diff --git a/.circleci/config.yml b/.circleci/config.yml
index e9e43c656..e91c41129 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -912,6 +912,8 @@ workflows:
             - build
           suite: itest-sector_pledge
           target: "./itests/sector_pledge_test.go"
+          get-params: true
+          
       - test:
           name: test-itest-sector_terminate
           requires:
diff --git a/.circleci/template.yml b/.circleci/template.yml
index 52086239a..71616f05f 100644
--- a/.circleci/template.yml
+++ b/.circleci/template.yml
@@ -545,7 +545,7 @@ workflows:
           [[- if or (eq $name "worker") (eq $name "deals_concurrent") (eq $name "wdpost_worker_config")]]
           executor: golang-2xl
           [[- end]]
-          [[- if (eq $name "wdpost")]]
+          [[- if or (eq $name "wdpost") (eq $name "sector_pledge")]]
           get-params: true
           [[end]]
       [[- end ]][[- end]]
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e0811bc4b..e6d540adf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,9 @@
 - fix: Add time slicing to splitstore purging step during compaction to reduce lock congestion [filecoin-project/lotus#11269](https://github.com/filecoin-project/lotus/pull/11269)
 - feat: Added instructions on how to setup Prometheus/Grafana for monitoring a local Lotus node [filecoin-project/lotus#11276](https://github.com/filecoin-project/lotus/pull/11276)
 
+## New features
+- feat: Add move-partition command ([filecoin-project/lotus#11290](https://github.com/filecoin-project/lotus/pull/11290))
+
 # v1.23.3 / 2023-08-01
 
 This feature release of Lotus includes numerous improvements and enhancements for node operators, ETH RPC-providers and storage providers.
diff --git a/api/api_full.go b/api/api_full.go
index 55dcc23df..f919bc13b 100644
--- a/api/api_full.go
+++ b/api/api_full.go
@@ -21,7 +21,6 @@ import (
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin/v8/paych"
 	"github.com/filecoin-project/go-state-types/builtin/v9/market"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
@@ -29,7 +28,7 @@ import (
 
 	apitypes "github.com/filecoin-project/lotus/api/types"
 	"github.com/filecoin-project/lotus/chain/actors/builtin"
-	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/actors/builtin/power"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/chain/types/ethtypes"
@@ -499,9 +498,9 @@ type FullNode interface {
 	// expiration epoch
 	StateSectorGetInfo(context.Context, address.Address, abi.SectorNumber, types.TipSetKey) (*miner.SectorOnChainInfo, error) //perm:read
 	// StateSectorExpiration returns epoch at which given sector will expire
-	StateSectorExpiration(context.Context, address.Address, abi.SectorNumber, types.TipSetKey) (*lminer.SectorExpiration, error) //perm:read
+	StateSectorExpiration(context.Context, address.Address, abi.SectorNumber, types.TipSetKey) (*miner.SectorExpiration, error) //perm:read
 	// StateSectorPartition finds deadline/partition with the specified sector
-	StateSectorPartition(ctx context.Context, maddr address.Address, sectorNumber abi.SectorNumber, tok types.TipSetKey) (*lminer.SectorLocation, error) //perm:read
+	StateSectorPartition(ctx context.Context, maddr address.Address, sectorNumber abi.SectorNumber, tok types.TipSetKey) (*miner.SectorLocation, error) //perm:read
 	// StateSearchMsg looks back up to limit epochs in the chain for a message, and returns its receipt and the tipset where it was executed
 	//
 	// NOTE: If a replacing message is found on chain, this method will return
diff --git a/api/api_gateway.go b/api/api_gateway.go
index 08199564d..27e725457 100644
--- a/api/api_gateway.go
+++ b/api/api_gateway.go
@@ -9,11 +9,11 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-jsonrpc"
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/dline"
 
 	apitypes "github.com/filecoin-project/lotus/api/types"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/chain/types/ethtypes"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
diff --git a/api/api_storage.go b/api/api_storage.go
index a9e632998..d5b3d5c1d 100644
--- a/api/api_storage.go
+++ b/api/api_storage.go
@@ -19,10 +19,10 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin/v9/market"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	abinetwork "github.com/filecoin-project/go-state-types/network"
 
 	builtinactors "github.com/filecoin-project/lotus/chain/actors/builtin"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/storage/pipeline/sealiface"
 	"github.com/filecoin-project/lotus/storage/sealer/fsutil"
@@ -461,10 +461,15 @@ type SectorOffset struct {
 
 // DealInfo is a tuple of deal identity and its schedule
 type PieceDealInfo struct {
+	// "Old" builtin-market deal info
 	PublishCid   *cid.Cid
 	DealID       abi.DealID
 	DealProposal *market.DealProposal
+
+	// Common deal info
 	DealSchedule DealSchedule
+
+	// Best-effort deal asks
 	KeepUnsealed bool
 }
 
diff --git a/api/cbor_gen.go b/api/cbor_gen.go
index 80392b212..fd2cb30b4 100644
--- a/api/cbor_gen.go
+++ b/api/cbor_gen.go
@@ -42,7 +42,7 @@ func (t *PaymentInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Channel"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Channel")); err != nil {
+	if _, err := cw.WriteString(string("Channel")); err != nil {
 		return err
 	}
 
@@ -58,7 +58,7 @@ func (t *PaymentInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Vouchers"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Vouchers")); err != nil {
+	if _, err := cw.WriteString(string("Vouchers")); err != nil {
 		return err
 	}
 
@@ -83,7 +83,7 @@ func (t *PaymentInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("WaitSentinel"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("WaitSentinel")); err != nil {
+	if _, err := cw.WriteString(string("WaitSentinel")); err != nil {
 		return err
 	}
 
@@ -163,13 +163,32 @@ func (t *PaymentInfo) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for i := 0; i < int(extra); i++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				var v paych.SignedVoucher
-				if err := v.UnmarshalCBOR(cr); err != nil {
-					return err
+					{
+
+						b, err := cr.ReadByte()
+						if err != nil {
+							return err
+						}
+						if b != cbg.CborNull[0] {
+							if err := cr.UnreadByte(); err != nil {
+								return err
+							}
+							t.Vouchers[i] = new(paych.SignedVoucher)
+							if err := t.Vouchers[i].UnmarshalCBOR(cr); err != nil {
+								return xerrors.Errorf("unmarshaling t.Vouchers[i] pointer: %w", err)
+							}
+						}
+
+					}
 				}
-
-				t.Vouchers[i] = &v
 			}
 
 			// t.WaitSentinel (cid.Cid) (struct)
@@ -214,7 +233,7 @@ func (t *SealedRef) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Size"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Size")); err != nil {
+	if _, err := cw.WriteString(string("Size")); err != nil {
 		return err
 	}
 
@@ -230,7 +249,7 @@ func (t *SealedRef) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Offset"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Offset")); err != nil {
+	if _, err := cw.WriteString(string("Offset")); err != nil {
 		return err
 	}
 
@@ -246,7 +265,7 @@ func (t *SealedRef) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("SectorID"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("SectorID")); err != nil {
+	if _, err := cw.WriteString(string("SectorID")); err != nil {
 		return err
 	}
 
@@ -369,7 +388,7 @@ func (t *SealedRefs) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Refs"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Refs")); err != nil {
+	if _, err := cw.WriteString(string("Refs")); err != nil {
 		return err
 	}
 
@@ -447,13 +466,22 @@ func (t *SealedRefs) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for i := 0; i < int(extra); i++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				var v SealedRef
-				if err := v.UnmarshalCBOR(cr); err != nil {
-					return err
+					{
+
+						if err := t.Refs[i].UnmarshalCBOR(cr); err != nil {
+							return xerrors.Errorf("unmarshaling t.Refs[i]: %w", err)
+						}
+
+					}
 				}
-
-				t.Refs[i] = v
 			}
 
 		default:
@@ -484,7 +512,7 @@ func (t *SealTicket) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Epoch"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Epoch")); err != nil {
+	if _, err := cw.WriteString(string("Epoch")); err != nil {
 		return err
 	}
 
@@ -506,7 +534,7 @@ func (t *SealTicket) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Value"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Value")); err != nil {
+	if _, err := cw.WriteString(string("Value")); err != nil {
 		return err
 	}
 
@@ -639,7 +667,7 @@ func (t *SealSeed) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Epoch"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Epoch")); err != nil {
+	if _, err := cw.WriteString(string("Epoch")); err != nil {
 		return err
 	}
 
@@ -661,7 +689,7 @@ func (t *SealSeed) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Value"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Value")); err != nil {
+	if _, err := cw.WriteString(string("Value")); err != nil {
 		return err
 	}
 
@@ -794,7 +822,7 @@ func (t *PieceDealInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("DealID"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("DealID")); err != nil {
+	if _, err := cw.WriteString(string("DealID")); err != nil {
 		return err
 	}
 
@@ -810,7 +838,7 @@ func (t *PieceDealInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PublishCid"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PublishCid")); err != nil {
+	if _, err := cw.WriteString(string("PublishCid")); err != nil {
 		return err
 	}
 
@@ -832,7 +860,7 @@ func (t *PieceDealInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("DealProposal"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("DealProposal")); err != nil {
+	if _, err := cw.WriteString(string("DealProposal")); err != nil {
 		return err
 	}
 
@@ -848,7 +876,7 @@ func (t *PieceDealInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("DealSchedule"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("DealSchedule")); err != nil {
+	if _, err := cw.WriteString(string("DealSchedule")); err != nil {
 		return err
 	}
 
@@ -864,7 +892,7 @@ func (t *PieceDealInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("KeepUnsealed"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("KeepUnsealed")); err != nil {
+	if _, err := cw.WriteString(string("KeepUnsealed")); err != nil {
 		return err
 	}
 
@@ -1027,7 +1055,7 @@ func (t *SectorPiece) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Piece"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Piece")); err != nil {
+	if _, err := cw.WriteString(string("Piece")); err != nil {
 		return err
 	}
 
@@ -1043,7 +1071,7 @@ func (t *SectorPiece) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("DealInfo"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("DealInfo")); err != nil {
+	if _, err := cw.WriteString(string("DealInfo")); err != nil {
 		return err
 	}
 
@@ -1150,7 +1178,7 @@ func (t *DealSchedule) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("EndEpoch"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("EndEpoch")); err != nil {
+	if _, err := cw.WriteString(string("EndEpoch")); err != nil {
 		return err
 	}
 
@@ -1172,7 +1200,7 @@ func (t *DealSchedule) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("StartEpoch"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("StartEpoch")); err != nil {
+	if _, err := cw.WriteString(string("StartEpoch")); err != nil {
 		return err
 	}
 
diff --git a/api/proxy_gen.go b/api/proxy_gen.go
index 1082e8f4c..2d1333495 100644
--- a/api/proxy_gen.go
+++ b/api/proxy_gen.go
@@ -26,7 +26,6 @@ import (
 	"github.com/filecoin-project/go-jsonrpc/auth"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/builtin/v8/paych"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
@@ -35,7 +34,7 @@ import (
 
 	apitypes "github.com/filecoin-project/lotus/api/types"
 	builtinactors "github.com/filecoin-project/lotus/chain/actors/builtin"
-	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/chain/types/ethtypes"
 	"github.com/filecoin-project/lotus/journal/alerting"
@@ -564,11 +563,11 @@ type FullNodeMethods struct {
 
 	StateSearchMsg func(p0 context.Context, p1 types.TipSetKey, p2 cid.Cid, p3 abi.ChainEpoch, p4 bool) (*MsgLookup, error) `perm:"read"`
 
-	StateSectorExpiration func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorExpiration, error) `perm:"read"`
+	StateSectorExpiration func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorExpiration, error) `perm:"read"`
 
 	StateSectorGetInfo func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorOnChainInfo, error) `perm:"read"`
 
-	StateSectorPartition func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorLocation, error) `perm:"read"`
+	StateSectorPartition func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorLocation, error) `perm:"read"`
 
 	StateSectorPreCommitInfo func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorPreCommitOnChainInfo, error) `perm:"read"`
 
@@ -3829,14 +3828,14 @@ func (s *FullNodeStub) StateSearchMsg(p0 context.Context, p1 types.TipSetKey, p2
 	return nil, ErrNotSupported
 }
 
-func (s *FullNodeStruct) StateSectorExpiration(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorExpiration, error) {
+func (s *FullNodeStruct) StateSectorExpiration(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorExpiration, error) {
 	if s.Internal.StateSectorExpiration == nil {
 		return nil, ErrNotSupported
 	}
 	return s.Internal.StateSectorExpiration(p0, p1, p2, p3)
 }
 
-func (s *FullNodeStub) StateSectorExpiration(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorExpiration, error) {
+func (s *FullNodeStub) StateSectorExpiration(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorExpiration, error) {
 	return nil, ErrNotSupported
 }
 
@@ -3851,14 +3850,14 @@ func (s *FullNodeStub) StateSectorGetInfo(p0 context.Context, p1 address.Address
 	return nil, ErrNotSupported
 }
 
-func (s *FullNodeStruct) StateSectorPartition(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorLocation, error) {
+func (s *FullNodeStruct) StateSectorPartition(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorLocation, error) {
 	if s.Internal.StateSectorPartition == nil {
 		return nil, ErrNotSupported
 	}
 	return s.Internal.StateSectorPartition(p0, p1, p2, p3)
 }
 
-func (s *FullNodeStub) StateSectorPartition(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorLocation, error) {
+func (s *FullNodeStub) StateSectorPartition(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorLocation, error) {
 	return nil, ErrNotSupported
 }
 
diff --git a/api/types.go b/api/types.go
index fd7ce0187..93ed4083f 100644
--- a/api/types.go
+++ b/api/types.go
@@ -19,8 +19,8 @@ import (
 	datatransfer "github.com/filecoin-project/go-data-transfer/v2"
 	"github.com/filecoin-project/go-fil-markets/retrievalmarket"
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
 )
diff --git a/api/v0api/full.go b/api/v0api/full.go
index 322f72449..d92d5a95c 100644
--- a/api/v0api/full.go
+++ b/api/v0api/full.go
@@ -15,7 +15,6 @@ import (
 	"github.com/filecoin-project/go-fil-markets/storagemarket"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/builtin/v8/paych"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
@@ -23,7 +22,7 @@ import (
 
 	"github.com/filecoin-project/lotus/api"
 	apitypes "github.com/filecoin-project/lotus/api/types"
-	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	marketevents "github.com/filecoin-project/lotus/markets/loggers"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
@@ -450,9 +449,9 @@ type FullNode interface {
 	// expiration epoch
 	StateSectorGetInfo(context.Context, address.Address, abi.SectorNumber, types.TipSetKey) (*miner.SectorOnChainInfo, error) //perm:read
 	// StateSectorExpiration returns epoch at which given sector will expire
-	StateSectorExpiration(context.Context, address.Address, abi.SectorNumber, types.TipSetKey) (*lminer.SectorExpiration, error) //perm:read
+	StateSectorExpiration(context.Context, address.Address, abi.SectorNumber, types.TipSetKey) (*miner.SectorExpiration, error) //perm:read
 	// StateSectorPartition finds deadline/partition with the specified sector
-	StateSectorPartition(ctx context.Context, maddr address.Address, sectorNumber abi.SectorNumber, tok types.TipSetKey) (*lminer.SectorLocation, error) //perm:read
+	StateSectorPartition(ctx context.Context, maddr address.Address, sectorNumber abi.SectorNumber, tok types.TipSetKey) (*miner.SectorLocation, error) //perm:read
 	// StateSearchMsg searches for a message in the chain, and returns its receipt and the tipset where it was executed
 	//
 	// NOTE: If a replacing message is found on chain, this method will return
diff --git a/api/v0api/gateway.go b/api/v0api/gateway.go
index df9153b8d..1a7f7d3ac 100644
--- a/api/v0api/gateway.go
+++ b/api/v0api/gateway.go
@@ -8,12 +8,12 @@ import (
 
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/dline"
 	abinetwork "github.com/filecoin-project/go-state-types/network"
 
 	"github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
 )
diff --git a/api/v0api/proxy_gen.go b/api/v0api/proxy_gen.go
index 22faa3acc..bd37f6429 100644
--- a/api/v0api/proxy_gen.go
+++ b/api/v0api/proxy_gen.go
@@ -17,7 +17,6 @@ import (
 	"github.com/filecoin-project/go-fil-markets/storagemarket"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/builtin/v8/paych"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
@@ -25,7 +24,7 @@ import (
 
 	"github.com/filecoin-project/lotus/api"
 	apitypes "github.com/filecoin-project/lotus/api/types"
-	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	marketevents "github.com/filecoin-project/lotus/markets/loggers"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
@@ -355,11 +354,11 @@ type FullNodeMethods struct {
 
 	StateSearchMsgLimited func(p0 context.Context, p1 cid.Cid, p2 abi.ChainEpoch) (*api.MsgLookup, error) `perm:"read"`
 
-	StateSectorExpiration func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorExpiration, error) `perm:"read"`
+	StateSectorExpiration func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorExpiration, error) `perm:"read"`
 
 	StateSectorGetInfo func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorOnChainInfo, error) `perm:"read"`
 
-	StateSectorPartition func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorLocation, error) `perm:"read"`
+	StateSectorPartition func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorLocation, error) `perm:"read"`
 
 	StateSectorPreCommitInfo func(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (miner.SectorPreCommitOnChainInfo, error) `perm:"read"`
 
@@ -2245,14 +2244,14 @@ func (s *FullNodeStub) StateSearchMsgLimited(p0 context.Context, p1 cid.Cid, p2
 	return nil, ErrNotSupported
 }
 
-func (s *FullNodeStruct) StateSectorExpiration(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorExpiration, error) {
+func (s *FullNodeStruct) StateSectorExpiration(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorExpiration, error) {
 	if s.Internal.StateSectorExpiration == nil {
 		return nil, ErrNotSupported
 	}
 	return s.Internal.StateSectorExpiration(p0, p1, p2, p3)
 }
 
-func (s *FullNodeStub) StateSectorExpiration(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorExpiration, error) {
+func (s *FullNodeStub) StateSectorExpiration(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorExpiration, error) {
 	return nil, ErrNotSupported
 }
 
@@ -2267,14 +2266,14 @@ func (s *FullNodeStub) StateSectorGetInfo(p0 context.Context, p1 address.Address
 	return nil, ErrNotSupported
 }
 
-func (s *FullNodeStruct) StateSectorPartition(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorLocation, error) {
+func (s *FullNodeStruct) StateSectorPartition(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorLocation, error) {
 	if s.Internal.StateSectorPartition == nil {
 		return nil, ErrNotSupported
 	}
 	return s.Internal.StateSectorPartition(p0, p1, p2, p3)
 }
 
-func (s *FullNodeStub) StateSectorPartition(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*lminer.SectorLocation, error) {
+func (s *FullNodeStub) StateSectorPartition(p0 context.Context, p1 address.Address, p2 abi.SectorNumber, p3 types.TipSetKey) (*miner.SectorLocation, error) {
 	return nil, ErrNotSupported
 }
 
diff --git a/api/v0api/v1_wrapper.go b/api/v0api/v1_wrapper.go
index f58b0420f..265674e71 100644
--- a/api/v0api/v1_wrapper.go
+++ b/api/v0api/v1_wrapper.go
@@ -12,11 +12,11 @@ import (
 	"github.com/filecoin-project/go-fil-markets/storagemarket"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/crypto"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/api/v1api"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	marketevents "github.com/filecoin-project/lotus/markets/loggers"
 )
diff --git a/blockstore/cbor_gen.go b/blockstore/cbor_gen.go
index b8ebdb474..221f13676 100644
--- a/blockstore/cbor_gen.go
+++ b/blockstore/cbor_gen.go
@@ -52,9 +52,11 @@ func (t *NetRpcReq) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.Cid {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.Cid: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 
 	// t.Data ([][]uint8) (slice)
@@ -151,12 +153,25 @@ func (t *NetRpcReq) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		c, err := cbg.ReadCid(cr)
-		if err != nil {
-			return xerrors.Errorf("reading cid field t.Cid failed: %w", err)
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.Cid[i]: %w", err)
+				}
+
+				t.Cid[i] = c
+
+			}
 		}
-		t.Cid[i] = c
 	}
 
 	// t.Data ([][]uint8) (slice)
@@ -183,6 +198,9 @@ func (t *NetRpcReq) UnmarshalCBOR(r io.Reader) (err error) {
 			var maj byte
 			var extra uint64
 			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
 			maj, extra, err = cr.ReadHeader()
 			if err != nil {
@@ -350,7 +368,7 @@ func (t *NetRpcErr) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Msg))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Msg)); err != nil {
+	if _, err := cw.WriteString(string(t.Msg)); err != nil {
 		return err
 	}
 
diff --git a/build/actors/v12.tar.zst b/build/actors/v12.tar.zst
index def521bd7..38cb85160 100644
Binary files a/build/actors/v12.tar.zst and b/build/actors/v12.tar.zst differ
diff --git a/build/bootstrap/butterflynet.pi b/build/bootstrap/butterflynet.pi
index c7e9b2e92..3f5033361 100644
--- a/build/bootstrap/butterflynet.pi
+++ b/build/bootstrap/butterflynet.pi
@@ -1,2 +1,2 @@
-/dns4/bootstrap-0.butterfly.fildev.network/tcp/1347/p2p/12D3KooWD5mtdmjHQ1Puj9Md7SEfoa7kWMpwqUhAKsyYsBP56LQC
-/dns4/bootstrap-1.butterfly.fildev.network/tcp/1347/p2p/12D3KooWEoYPkm6o87ES6AppFY7d7WHJUQg7XVPRAyQZjEU31efQ
+/dns4/bootstrap-0.butterfly.fildev.network/tcp/1347/p2p/12D3KooWRaoPgwJuZdPSN4A2iTeh8xzkZGCEBxan9vMkidHisUgn
+/dns4/bootstrap-1.butterfly.fildev.network/tcp/1347/p2p/12D3KooWMjLCZeEf3VzSWvQYuhe9VzCcrN6RENX9FgmQqiJfQDWs
diff --git a/build/builtin_actors_gen.go b/build/builtin_actors_gen.go
index 3eed5bcf7..0e1f4fe20 100644
--- a/build/builtin_actors_gen.go
+++ b/build/builtin_actors_gen.go
@@ -97,25 +97,25 @@ var EmbeddedBuiltinActorsMetadata []*BuiltinActorsMetadata = []*BuiltinActorsMet
 }, {
 	Network:      "butterflynet",
 	Version:      12,
-	BundleGitTag: "v11.0.0",
-	ManifestCid:  MustParseCid("bafy2bzaceaiy4dsxxus5xp5n5i4tjzkb7sc54mjz7qnk2efhgmsrobjesxnza"),
+	BundleGitTag: "v12.0.0-rc.1",
+	ManifestCid:  MustParseCid("bafy2bzaceb7s3k6zyuubqil7s2rwdcdyslqqx2fn2cj536yh3hexlyi4syyk6"),
 	Actors: map[string]cid.Cid{
-		"account":          MustParseCid("bafk2bzacecfdqb7p3jakhaa3cqnzpt7hxmhghrbxvafsylqno3febx55fnidw"),
-		"cron":             MustParseCid("bafk2bzaceavmqu2qihgbe3xdaotgypuzvdpiifnm7ll6rolks2u4lac6voosk"),
-		"datacap":          MustParseCid("bafk2bzacealtvh65rzb34fmyzw4m2np2htnio4w3pn4alzqovwxkdbf23dvpo"),
-		"eam":              MustParseCid("bafk2bzacedko6hcjmwpuwgma5pb4gr2wgyvregk3nqqjxit7dv4es6vh5cjoc"),
-		"ethaccount":       MustParseCid("bafk2bzacedhcei2xnr34poxr4xziypm2obqlibke4cs2cjfnr3sz6nf6h7fyy"),
-		"evm":              MustParseCid("bafk2bzacebn5lwxboiikhz67ajwa34v2lc4qevnhpwdnipbmrnutkvrrqkb46"),
-		"init":             MustParseCid("bafk2bzacea6vw4esh5tg7mprv5jkbx5xcyilcy4vvf64lss32mjyuvv2mh5ng"),
-		"multisig":         MustParseCid("bafk2bzacedq2afnwcfipay5twv5mgzjoio5bbjvyo4yqchdwqcr7wrareyx54"),
-		"paymentchannel":   MustParseCid("bafk2bzacebbsvr7i7mqmaadyjibe5wxnv7bwvvec2wlgknuwda6ep45amnd5w"),
+		"account":          MustParseCid("bafk2bzacebp7anjdtg2sohyt6lromx4xs7nujtwdfcsffnptphaayabx7ysxs"),
+		"cron":             MustParseCid("bafk2bzacecu2y3awtemmglpkroiglulc2fj3gpdn6eazdqr6avcautiaighrg"),
+		"datacap":          MustParseCid("bafk2bzacebbh5aynu3v3fluqqrcdsphleodoig42xkid2ccwdnff3avhbdop4"),
+		"eam":              MustParseCid("bafk2bzacebzwt4v4hqoltiblhliwrnttxpr2dggbu3wsrvq4pwzisp7idu5w4"),
+		"ethaccount":       MustParseCid("bafk2bzaceb5f6vgjkl7ic6ry5sjspqm2iij6qlcdovwi3haodb7wn37pgebii"),
+		"evm":              MustParseCid("bafk2bzacebygt6zh6p52rkg2ugehm4k5yuu6f56i2pu6ywrmjez4n4zsje4p4"),
+		"init":             MustParseCid("bafk2bzaceagyf3pwsthod7klfi25ow2zf2i5isfrrgr5ua3lvkgfojalrdbhw"),
+		"multisig":         MustParseCid("bafk2bzacedgfo5mw2zqjwi37lah27sfxj4cw2abylgtxf3ucep4dyhgnppmqe"),
+		"paymentchannel":   MustParseCid("bafk2bzacebm37tgu52cgzmiln6iip6etfmq73fd3qqz2j5gxlhtvachs7kw4c"),
 		"placeholder":      MustParseCid("bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro"),
-		"reward":           MustParseCid("bafk2bzaceafuh6idvaqqkj353vs4qdl42tcmvnymewu5zf4rq2nruxdyunses"),
-		"storagemarket":    MustParseCid("bafk2bzaceb7bx4honi3byjllpdk6fea32dpu3vqvil3okodybdk5m3erlnwjw"),
-		"storageminer":     MustParseCid("bafk2bzacebxjhofdr3sb2uhy2ky2vcijh4nhmwkh5xijtbgk6dzkknji2kn7a"),
-		"storagepower":     MustParseCid("bafk2bzaceabskmmkas6njbowols7t4ib3bipa5abpomk3jtgfwojtzd7mjzfm"),
-		"system":           MustParseCid("bafk2bzacedtuh7cht3fud7fb4avl4g2zbz57lc4ohiaufpaex6dkmdokn5rgo"),
-		"verifiedregistry": MustParseCid("bafk2bzaceb37hxeuoo5rgf6ansrdl2ykm5v5zp6kireubn4orcopr67jbxv6k"),
+		"reward":           MustParseCid("bafk2bzacedebvitdsztwebi44t5es4ls3p3hor252igzawr3s6uznmbvzh2ou"),
+		"storagemarket":    MustParseCid("bafk2bzaceb2tdeqtt2eqpzeb3gezuchb7g7uzbd52bgvcdt6bg3ckq7oisb74"),
+		"storageminer":     MustParseCid("bafk2bzaceaaztuglvw6pw5xohwfekbw47iyugbyftxrp6hwygsaiu6rebtcty"),
+		"storagepower":     MustParseCid("bafk2bzacedxvlj5xmhytdjrjqyonz37duvxb2ioyzk75c27yypkqalxuh3xh6"),
+		"system":           MustParseCid("bafk2bzacec3vwj2chzaram3iqupkbfiein5h2l5qiltlrngbju2vg5umelclm"),
+		"verifiedregistry": MustParseCid("bafk2bzacedv2irkql7nil3w5v3ohqq3e54w62pxeoppjmaktzokolaaoh5ksu"),
 	},
 }, {
 	Network: "calibrationnet",
@@ -203,25 +203,25 @@ var EmbeddedBuiltinActorsMetadata []*BuiltinActorsMetadata = []*BuiltinActorsMet
 }, {
 	Network:      "calibrationnet",
 	Version:      12,
-	BundleGitTag: "v11.0.0",
-	ManifestCid:  MustParseCid("bafy2bzacec5fl7crmxyw234qsmijvffhssgqwuphyaejulbryhel2pxxrxgey"),
+	BundleGitTag: "v12.0.0-rc.1",
+	ManifestCid:  MustParseCid("bafy2bzacedrunxfqta5skb7q7x32lnp4efz2oq7fn226ffm7fu5iqs62jkmvs"),
 	Actors: map[string]cid.Cid{
-		"account":          MustParseCid("bafk2bzacecrjovyiuh4jryepy4pxddzqjyrg2hfinxzbv37bpzlci54r5mkr6"),
-		"cron":             MustParseCid("bafk2bzacedy76woxmtalmsuaji4kog6wmq4h2kcgcyv5wpxbdz7f2ls2tjjmw"),
-		"datacap":          MustParseCid("bafk2bzacec2inqddxpfm3rufwqr752d2ok3ve4cxfhmloyosy6rj2krtkpwus"),
-		"eam":              MustParseCid("bafk2bzacea6sxno66egkqz5rqjq4e22obkeblxl7e3funjifljuinmrc2ztzg"),
-		"ethaccount":       MustParseCid("bafk2bzacecdsvs7xm3ncm66lsjqh65uzhr3rmu3dlux7qzdgpg737r4kslhxm"),
-		"evm":              MustParseCid("bafk2bzaceaz3b66m2znt27clmbp2zi5jsobw6g2x6fiezynyijgtkehgqhq3a"),
-		"init":             MustParseCid("bafk2bzacecdrw7uedx456hnowtyyhm63mkekdlkh3vmlhvqlya6pn6pokiq5y"),
-		"multisig":         MustParseCid("bafk2bzaceaxyxvmng5cel5huzy5nezscm34s7wuzn2fhndexurs3xjtp7xg5i"),
-		"paymentchannel":   MustParseCid("bafk2bzacedrmyc4c6u6ipdo7hwaagx3urr47r4pw6lwv257wqbj6roumwfvky"),
+		"account":          MustParseCid("bafk2bzacechwwxdqvggkdylm37zldjsra2ivkdzwp7fee56bzxbzs544wv6u6"),
+		"cron":             MustParseCid("bafk2bzacec4gdxxkqwxqqodsv6ug5dmdbqdfqwyqfek3yhxc2wweh5psxaeq6"),
+		"datacap":          MustParseCid("bafk2bzacecq5ppfskxgv3iea3jarsix6jdduuhwsn4fbvngtbmzelzmlygorm"),
+		"eam":              MustParseCid("bafk2bzacecb6cnwftvavpph4p34zs4psuy5xvbrhf7vszkva4npw6mw3c42xe"),
+		"ethaccount":       MustParseCid("bafk2bzaceajmc3y3sedsqymfla3dzzqzmbu5kmr2iskm26ga2u34ll5fpztfw"),
+		"evm":              MustParseCid("bafk2bzaced4sozr7m6rzcgpobzeiupghthfw6afumysu3oz6bxxirv74uo3vw"),
+		"init":             MustParseCid("bafk2bzaceaewh7b6zl2egclm7fqzx2lsqr57i75lb6cj43ndoa4mal3k5ld3m"),
+		"multisig":         MustParseCid("bafk2bzacednkwcpw5yzxjceoaliajgupzj6iqxe7ks2ll3unspbprbo5f2now"),
+		"paymentchannel":   MustParseCid("bafk2bzacebaxhk4itfiuvbftg7kz5zxugqnvdgerobitjq4vl6q4orcwk6wqg"),
 		"placeholder":      MustParseCid("bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro"),
-		"reward":           MustParseCid("bafk2bzacecq3bhrkatwash5zhy2275ksaj3criqb6rox5e3hsyvz7mrl2jh3o"),
-		"storagemarket":    MustParseCid("bafk2bzacedswrpkbh7jmttskllbblym7oj2ynxp7bxtj2fpbxsx55mraog6sc"),
-		"storageminer":     MustParseCid("bafk2bzacecki6ckm7gf4uje3fxvw6x5f77ukaqctvcsfha6oaecvl67veh3sg"),
-		"storagepower":     MustParseCid("bafk2bzacecjcvxwibkgpufeah33gfd2jzlqjx5rn2pguvvch2squon23u6kne"),
-		"system":           MustParseCid("bafk2bzaceavvlgqbcwhy3c24aa24z23wcbzggmb66gj7x5if7o3fbvddaocc4"),
-		"verifiedregistry": MustParseCid("bafk2bzacedmxdtnpy2mc63b6bi2h4vp4dfc6hxjckqnwaxyijgkpmangygcmk"),
+		"reward":           MustParseCid("bafk2bzacedra77pcglf7vdca2itcaa4vd6xrxynxmgfgdjdxqxfwqyhtoxehy"),
+		"storagemarket":    MustParseCid("bafk2bzacea7g46y7xxu2zjq2h75x6mmx3utz2uxnlvnwi6tzpsvulna3bmiva"),
+		"storageminer":     MustParseCid("bafk2bzacecnh2ouohmonvebq7uughh4h3ppmg4cjsk74dzxlbbtlcij4xbzxq"),
+		"storagepower":     MustParseCid("bafk2bzacedd3ka44k7d46ckbinjhv3diyuu2epgbyvhqqyjkc64qlrg3wlgzi"),
+		"system":           MustParseCid("bafk2bzacecioupndtcnyw6iq2hbrxag3aufvczlv5nobnfbkbywqzcyfaa376"),
+		"verifiedregistry": MustParseCid("bafk2bzaceavldupmf7bimeeacs67z5xdfdlfca6p7sn6bev3mt5ggepfqvhqo"),
 	},
 }, {
 	Network: "caterpillarnet",
@@ -318,25 +318,25 @@ var EmbeddedBuiltinActorsMetadata []*BuiltinActorsMetadata = []*BuiltinActorsMet
 }, {
 	Network:      "caterpillarnet",
 	Version:      12,
-	BundleGitTag: "v11.0.0",
-	ManifestCid:  MustParseCid("bafy2bzacebexc2jgzwr5ngn6jdnkwdqwwmcapajuypdgvopoe6bnvp4yxm4o2"),
+	BundleGitTag: "v12.0.0-rc.1",
+	ManifestCid:  MustParseCid("bafy2bzacedrimdbavexkdqldjwczbhlx4k5byshl363z62rrt6vkt7mbvnulu"),
 	Actors: map[string]cid.Cid{
-		"account":          MustParseCid("bafk2bzaceanjiq5m3feytue5m7hhxfkob2ofg2greoct5tr77reuhrjglo66g"),
-		"cron":             MustParseCid("bafk2bzaceavgd5qj6n744tukhdrvxejygzs3jnlizmcvjsdnxkgiimrd5jrys"),
-		"datacap":          MustParseCid("bafk2bzacedmdywxwrzop2gmf4ys5stydlmvbe35j3nyr2efmf273briksuvse"),
-		"eam":              MustParseCid("bafk2bzacec7qo7s72li7tqysllstlrxxm2dhfqv2w32pytel2e775cki4ozqm"),
-		"ethaccount":       MustParseCid("bafk2bzaceaygtkliu26ubb7ivljrvaeesp5sbjlis5okzl35ishxioa2tlx4w"),
-		"evm":              MustParseCid("bafk2bzacebo7iqzy2ophz4f3civzwlltec7q5fut7kmtfckr6vy33r6ic5eqe"),
-		"init":             MustParseCid("bafk2bzaceb7uzzlsquqwrqhb2vpbvk3jgr4wp5i3smu2splnag2v5sppdehns"),
-		"multisig":         MustParseCid("bafk2bzacebwibfqrytobl4pjtny244zkmfoomazbap3r5gddjryckx5js4csi"),
-		"paymentchannel":   MustParseCid("bafk2bzacecuaa5esuxpouigxoamyl5gire2qqqhvyhewsig2x2j73f6ksh7go"),
+		"account":          MustParseCid("bafk2bzacecereuhejfvodut5357cai4lmhsyr7uenhcxvmw6jpmhe6auuly32"),
+		"cron":             MustParseCid("bafk2bzacebo2whgy6jla4jsf5j4ovlqm2e4eepedlpw5wadas33yxmunis4b4"),
+		"datacap":          MustParseCid("bafk2bzacecjjncl7ftgj4mrzxxfxld74pt3pyfrxmcru7a5auab25b3aoixm6"),
+		"eam":              MustParseCid("bafk2bzacebyvawfzoxy7k4yxrj5nd3amg4rcopmnslxdwpzumfhsz5ezk4sws"),
+		"ethaccount":       MustParseCid("bafk2bzaceaccs76uc6osvb2iy6w2pumqei3wdjtxq7rgtsotobncmqoi7kzcg"),
+		"evm":              MustParseCid("bafk2bzaceawxgjzjkhbqwj36wzxeqbtngdh6y2tp4wsi27k7tbg2ujhw5rsjg"),
+		"init":             MustParseCid("bafk2bzacedws5od7o6ktqyo2hudmipxuubsv2lwxz45xxjn2zguze72t6zoik"),
+		"multisig":         MustParseCid("bafk2bzacecb4wk6n4lrmml3tssn6cszd4dc7ttux3kzjatrawhg4o6ovrng6w"),
+		"paymentchannel":   MustParseCid("bafk2bzacea3eb556mkjvosfbqfbyfg6dgu52rfnuctwzjy3b2bh2azredxzbo"),
 		"placeholder":      MustParseCid("bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro"),
-		"reward":           MustParseCid("bafk2bzaced4xxqhv63njf2ibvsqshlwikafctxev7aho5lgsfxyt2javjwvtw"),
-		"storagemarket":    MustParseCid("bafk2bzacedwtx3xokqmbgkgkoqkdt6lam4ymdjb3eznlbtec5wcrtx74l2bpc"),
-		"storageminer":     MustParseCid("bafk2bzacebbbe4sdo3xxkez7x7lkl6j46w34vx7eg7xswmdzhp7moa44p3wjg"),
-		"storagepower":     MustParseCid("bafk2bzacedfgz6n24tjsor4pcayomim2f5f3a3fgyatmjgwxxeejna7okndda"),
-		"system":           MustParseCid("bafk2bzacebxfzeom3d7ahcz2n2nlwp7ncv767bdbbrisugks4l6v7lcu2tmyg"),
-		"verifiedregistry": MustParseCid("bafk2bzacedaws3or3twy45ltcxucgvqijsje4x675ph6vup2w35smlfneamno"),
+		"reward":           MustParseCid("bafk2bzaceb2x5zgkrho373l3ippp6krs7brugssg6hj2tib22xmqjzdm2o25a"),
+		"storagemarket":    MustParseCid("bafk2bzaced5j6drzmsebpxbf2dtptrc5tyidlbftdljqxavxqb57s2qpbvdek"),
+		"storageminer":     MustParseCid("bafk2bzacedozwxc3c6nqqajafs3hsjviyijhthysd5two5ptm5fcdbwh224ag"),
+		"storagepower":     MustParseCid("bafk2bzaceagp6ilkltsltwii66nz6a4zen4qtfk7rdkvdv3gzq7fbv4ivox3u"),
+		"system":           MustParseCid("bafk2bzacedye5j5uxox7knb6zlnhseaadztyav76mjbyk5qslhhbpiy5cdtt2"),
+		"verifiedregistry": MustParseCid("bafk2bzacecduww5pirr7dvaijjijw4gf6ygf7vipgxh4scvv6vseo46gueb46"),
 	},
 }, {
 	Network: "devnet",
@@ -424,25 +424,25 @@ var EmbeddedBuiltinActorsMetadata []*BuiltinActorsMetadata = []*BuiltinActorsMet
 }, {
 	Network:      "devnet",
 	Version:      12,
-	BundleGitTag: "v11.0.0",
-	ManifestCid:  MustParseCid("bafy2bzaceay35go4xbjb45km6o46e5bib3bi46panhovcbedrynzwmm3drr4i"),
+	BundleGitTag: "v12.0.0-rc.1",
+	ManifestCid:  MustParseCid("bafy2bzacebk6yiirh4ennphzyka7b6g6jzn3lt4lr5ht7rjwulnrcthjihapo"),
 	Actors: map[string]cid.Cid{
-		"account":          MustParseCid("bafk2bzacecf2pprkbdlpm4e2xz3ufunxtgrgyh2ie3stuqiyhibsvdze7kvri"),
-		"cron":             MustParseCid("bafk2bzaceasr5d2skowvzv5mzsyak6waqrgc46ewj6rzbapkfi5woom6n6bwa"),
-		"datacap":          MustParseCid("bafk2bzaceaqd77gptubupda7rp7daxkxbkzwc253dxhiyoezxvj2tljmkgpny"),
-		"eam":              MustParseCid("bafk2bzacedve6p4ye6zxydjbfs4ode5r2equ7rqzpyltujsq2lu6wyxnijfx4"),
-		"ethaccount":       MustParseCid("bafk2bzacea25xfsxwew3h2crer6jlb4c5vwu2gtch2jh73ocuxjhupenyrugy"),
-		"evm":              MustParseCid("bafk2bzacece5hivtkmi757lyfahgti7xuqgofodb2u65pxgf6oizfwiiwlcsi"),
-		"init":             MustParseCid("bafk2bzacecxnr5y7qifzdqqiwfbjxv2yr7lbkcyu3e2mf5zjdncteupxdlquu"),
-		"multisig":         MustParseCid("bafk2bzaceayap4k4u3lbysaeeixct5fvhmafy3fa5eagvdpk3i4a7ubfdpobe"),
-		"paymentchannel":   MustParseCid("bafk2bzaceafgrz5wepbein35gie7rnsu7zttxvgllgdneuefmmy4j5izydtza"),
+		"account":          MustParseCid("bafk2bzacedki4apynvdxxuoigmqkgaktgy2erjftoxqxqaklnelgveyaqknfu"),
+		"cron":             MustParseCid("bafk2bzacebjpczf7qtcisy3zdp3sqoohxe75tgupmdo5dr26vh7orzrsjn3b2"),
+		"datacap":          MustParseCid("bafk2bzacecz4esatk7gizdc7yvl6soigkelhix7izbc75q6eqtb7gjzavpcqc"),
+		"eam":              MustParseCid("bafk2bzacebhtpd5mxfyovi7fgsfj62nhtmh4t5guob4sgq73ymgsk7473ltig"),
+		"ethaccount":       MustParseCid("bafk2bzacebvdbbw5ag4qnxd7cif5mtakrw4wzv63diwl7awta5plaidfay4vg"),
+		"evm":              MustParseCid("bafk2bzacebb7vrhprnshn52bzfmypjdpcrcfecapk232a6gapk3kghu2mp67q"),
+		"init":             MustParseCid("bafk2bzaceaw4iouukgqxmwukfpt3sakdvsu75ftjvw47swnwtdftz5oszbt4w"),
+		"multisig":         MustParseCid("bafk2bzaceahyjwf6re4mnuwhopglo3qzh6aboluboncpijm7vuiz3u4bkazho"),
+		"paymentchannel":   MustParseCid("bafk2bzaceaupjw3djghaqw3g3hd4tw7uuas3njkszgzx2fhmgqh5eh4e6q2by"),
 		"placeholder":      MustParseCid("bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro"),
-		"reward":           MustParseCid("bafk2bzacedwbtfqlx47fdkxjrb5mwiatheci44x3zkpx33smybc2cme23ymuo"),
-		"storagemarket":    MustParseCid("bafk2bzaceaj74fmooaf3gj3ebwon64ky7hhdh7kytdr3agclqfrqzmpzykh7g"),
-		"storageminer":     MustParseCid("bafk2bzacedb7bokkzzs7hnbhivp74pgcpermuy7j6b3ncodylksukkxtnn7ze"),
-		"storagepower":     MustParseCid("bafk2bzacedilnkegizkxz3nuutib4d4wwlk4bkla22loepia2h53yf4hysmq6"),
-		"system":           MustParseCid("bafk2bzacedpyoncjbl4oxkjm5e77ngvpy2xfajjc4myfsv2vltvzxioattlu2"),
-		"verifiedregistry": MustParseCid("bafk2bzacebdqi5tr5pjnem5nylg2zbqcugvi7oxi35bhnrfudx4y4ufhlit2k"),
+		"reward":           MustParseCid("bafk2bzacebzso6xkjxdscbpncw7el2d4hap6lfkgwqzrbc76lzp33vkwk6obc"),
+		"storagemarket":    MustParseCid("bafk2bzacebzg74vyk3gzbhnz4zviwvxblyar574mtd6ayognmsvlkriejmunu"),
+		"storageminer":     MustParseCid("bafk2bzaceajgt523lr2sf6cacvzo3goyalljlkaoeehyhxlv57wevkljw2cps"),
+		"storagepower":     MustParseCid("bafk2bzacebbtj2m2ajawfuzxqz5nmdep7xevjo2qfjqa5tx3vr5m6qojolya4"),
+		"system":           MustParseCid("bafk2bzacecnau5wddulbsvwn75tc3w75jrlvkybgrlxs4ngonqab6xq3eowvg"),
+		"verifiedregistry": MustParseCid("bafk2bzacec37mddea65nvh4htsagtryfa3sq6i67utcupslyhzbhjhoy6hopa"),
 	},
 }, {
 	Network: "hyperspace",
@@ -553,25 +553,25 @@ var EmbeddedBuiltinActorsMetadata []*BuiltinActorsMetadata = []*BuiltinActorsMet
 }, {
 	Network:      "mainnet",
 	Version:      12,
-	BundleGitTag: "v11.0.0",
-	ManifestCid:  MustParseCid("bafy2bzacecnhaiwcrpyjvzl4uv4q3jzoif26okl3m66q3cijp3dfwlcxwztwo"),
+	BundleGitTag: "v12.0.0-rc.1",
+	ManifestCid:  MustParseCid("bafy2bzacebxmnxdgt2usdrcrpotgodr75culawwv4eklaun4lu6vlxecql6h2"),
 	Actors: map[string]cid.Cid{
-		"account":          MustParseCid("bafk2bzacealnlr7st6lkwoh6wxpf2hnrlex5sknaopgmkr2tuhg7vmbfy45so"),
-		"cron":             MustParseCid("bafk2bzacebpewdvvgt6tk2o2u4rcovdgym67tadiis5usemlbejg7k3kt567o"),
-		"datacap":          MustParseCid("bafk2bzacebslykoyrb2hm7aacjngqgd5n2wmeii2goadrs5zaya3pvdf6pdnq"),
-		"eam":              MustParseCid("bafk2bzaceaelwt4yfsfvsu3pa3miwalsvy3cfkcjvmt4sqoeopsppnrmj2mf2"),
-		"ethaccount":       MustParseCid("bafk2bzaceclkmc4yidxc6lgcjpfypbde2eddnevcveo4j5kmh4ek6inqysz2k"),
-		"evm":              MustParseCid("bafk2bzacediwh6etwzwmb5pivtclpdplewdjzphouwqpppce6opisjv2fjqfe"),
-		"init":             MustParseCid("bafk2bzaceckwf3w6n2nw6eh77ktmsxqgsvshonvgnyk5q5syyngtetxvasfxg"),
-		"multisig":         MustParseCid("bafk2bzaceafajceqwg5ybiz7xw6rxammuirkgtuv625gzaehsqfprm4bazjmk"),
-		"paymentchannel":   MustParseCid("bafk2bzaceb4e6cnsnviegmqvsmoxzncruvhra54piq7bwiqfqevle6oob2gvo"),
+		"account":          MustParseCid("bafk2bzaceboftg75mdiba7xbo2i3uvgtca4brhnr3u5ptihonixgpnrvhpxoa"),
+		"cron":             MustParseCid("bafk2bzacechxjkfe2cehx4s7skj3wzfpzf7zolds64khrrrs66bhazsemktls"),
+		"datacap":          MustParseCid("bafk2bzacebpiwb2ml4qbnnaayxumtk43ryhc63exdgnhivy3hwgmzemawsmpq"),
+		"eam":              MustParseCid("bafk2bzaceb3elj4hfbbjp7g5bptc7su7mptszl4nlqfedilxvstjo5ungm6oe"),
+		"ethaccount":       MustParseCid("bafk2bzaceb4gkau2vgsijcxpfuq33bd7w3efr2rrhxrwiacjmns2ntdiamswq"),
+		"evm":              MustParseCid("bafk2bzacecmnyfiwb52tkbwmm2dsd7ysi3nvuxl3lmspy7pl26wxj4zj7w4wi"),
+		"init":             MustParseCid("bafk2bzacebllyegx5r6lggf6ymyetbp7amacwpuxakhtjvjtvoy2bfkzk3vms"),
+		"multisig":         MustParseCid("bafk2bzacecw5lyp3n3t67xdwrmo36h4z7afc3lobmmr6wg55w6yjzg5jhmh42"),
+		"paymentchannel":   MustParseCid("bafk2bzacectv4cm47bnhga5febf3lo3fq47g72kmmp2xd5s6tcxz7hiqdywa4"),
 		"placeholder":      MustParseCid("bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro"),
-		"reward":           MustParseCid("bafk2bzacebwjw2vxkobs7r2kwjdqqb42h2kucyuk6flbnyzw4odg5s4mogamo"),
-		"storagemarket":    MustParseCid("bafk2bzaceazu2j2zu4p24tr22btnqzkhzjvyjltlvsagaj6w3syevikeb5d7m"),
-		"storageminer":     MustParseCid("bafk2bzacec24okjqrp7c7rj3hbrs5ez5apvwah2ruka6haesgfngf37mhk6us"),
-		"storagepower":     MustParseCid("bafk2bzaceaxgloxuzg35vu7l7tohdgaq2frsfp4ejmuo7tkoxjp5zqrze6sf4"),
-		"system":           MustParseCid("bafk2bzaced7npe5mt5nh72jxr2igi2sofoa7gedt4w6kueeke7i3xxugqpjfm"),
-		"verifiedregistry": MustParseCid("bafk2bzacedej3dnr62g2je2abmyjg3xqv4otvh6e26du5fcrhvw7zgcaaez3a"),
+		"reward":           MustParseCid("bafk2bzacealqnxn5lwzwexd6reav4dppypquklx2ujlnvaxiqk2tzstyvkp5u"),
+		"storagemarket":    MustParseCid("bafk2bzacedylkg5am446lcuih4voyzdn4yjeqfsxfzh5b6mcuhx4mok5ph5c4"),
+		"storageminer":     MustParseCid("bafk2bzacea56yi2khvvorofkf2t4rb5fbmltahrjtauszirdjz4jbunt55xsk"),
+		"storagepower":     MustParseCid("bafk2bzacecsij5tpfzjpfuckxvccv2p3bdqjklkrfyyoei6lx5dyj5j4fvjm6"),
+		"system":           MustParseCid("bafk2bzacebfqrja2hip7esf4eafxjmu6xcogoqu5xxtgdg7xa5szgvvdguchu"),
+		"verifiedregistry": MustParseCid("bafk2bzacedudgflxc75c77c6zkmfyq4u2xuk7k6xw6dfdccarjrvxx453b77q"),
 	},
 }, {
 	Network: "testing",
@@ -659,25 +659,25 @@ var EmbeddedBuiltinActorsMetadata []*BuiltinActorsMetadata = []*BuiltinActorsMet
 }, {
 	Network:      "testing",
 	Version:      12,
-	BundleGitTag: "v11.0.0",
-	ManifestCid:  MustParseCid("bafy2bzacea2vxre32tg3xhpejrktiuzx4d3pcoe7yyazgscfibmegmchr6n42"),
+	BundleGitTag: "v12.0.0-rc.1",
+	ManifestCid:  MustParseCid("bafy2bzacebzcqzzlb5iwrledyuyy7pvob3xwzoxqsrvrbrnpaiejb52na5eza"),
 	Actors: map[string]cid.Cid{
-		"account":          MustParseCid("bafk2bzaceccerssb3tgel6ukdghlwvs7dxsolj4fpkgn7dh7owzwapqb6ejpw"),
-		"cron":             MustParseCid("bafk2bzacebtfl6fczxnitrqqjhyefskf3asyn3gzuvqcddieoqfsaddk5fd4q"),
-		"datacap":          MustParseCid("bafk2bzacediikc55y6uzmnhucf4mik6rqpjulwvgp5gdibogxjhgbvusmzff2"),
-		"eam":              MustParseCid("bafk2bzaceazqi5ezossp6kvqogaaba6hxlfarqgniktmb7iy5qonha3eflz6m"),
-		"ethaccount":       MustParseCid("bafk2bzaceb77ospgfqqmf67v23wkyeg7lr2mu53ybaacu3bslx7s7nhttdueo"),
-		"evm":              MustParseCid("bafk2bzacedvgt7mv22hux4vrnklylq7qmw43kfrqwam6wdsfzkdnaewr33qbu"),
-		"init":             MustParseCid("bafk2bzacealzb3nk2oypway5ubz3hs5py5ok5tuw545454vg4d3mwbslef4js"),
-		"multisig":         MustParseCid("bafk2bzacec45ppn4hrwizmopp2v2atkxw35tb6yem6uqhqilrv7aiaknnnxmu"),
-		"paymentchannel":   MustParseCid("bafk2bzaceajbr3t6cngzh3katqteflbcrtwtdgbthnlfemon5tg6rytf2uonw"),
+		"account":          MustParseCid("bafk2bzacea74qqkfvacykmq5emzqblh4f4nmxdkiyixxpzs7kkcfnbfa7cb6m"),
+		"cron":             MustParseCid("bafk2bzacecotbu7k6awdzfzakf7g5iaas6gswtunjnnb2xm2klqoshjgb4imy"),
+		"datacap":          MustParseCid("bafk2bzaceduhmqcyailiwdupt2ottfzh5hcrjoyeyiaipf3idk3mu7y3uz2mc"),
+		"eam":              MustParseCid("bafk2bzaceb2yzzw6dcmcmhnt3mqnm4kah66f23pc4escnto3vwa552t6ctr7i"),
+		"ethaccount":       MustParseCid("bafk2bzacebwkvvbmttkcjjlicp4ineozc52i5sc6d46pcoq6lzzs2p5i2youa"),
+		"evm":              MustParseCid("bafk2bzacedetwacs6wmoksxwjlbpp4442uav7fd3pagadejm2cph7ucym7eck"),
+		"init":             MustParseCid("bafk2bzacedhpoycn4sz7dragmbo5yqjspqriydxhplqdeguaqck2hmq5hgwqg"),
+		"multisig":         MustParseCid("bafk2bzaceacc3m23yvnpzoeekstqtr2acutfv4zvsgncorjdrsucymjohzxs4"),
+		"paymentchannel":   MustParseCid("bafk2bzaceac6i76vfexefqf6qgebkhkf2cb4g664d5nmfh2dric5spgykevd2"),
 		"placeholder":      MustParseCid("bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro"),
-		"reward":           MustParseCid("bafk2bzacea7ycf53kbq4robcuh3ziy7qwwhaqamc5krn3lugypgpxhlewdaiq"),
-		"storagemarket":    MustParseCid("bafk2bzacedskmbcpaeb6bezs32szh52jrukvihobluadauayroo5gzrt32tkm"),
-		"storageminer":     MustParseCid("bafk2bzaced3yg5lctmswnbkxyd6cleg3llyux7fu2vbddyd2ho36fpym423mq"),
-		"storagepower":     MustParseCid("bafk2bzacebvpdf372fzxgixztbz2r7ayxyvx7jmdxwlfuqt2cq7tnqgie3klw"),
-		"system":           MustParseCid("bafk2bzaceaatvscbnkv36ixhtt2zel4er5oskxevgumh5gegqkv7uzah36f24"),
-		"verifiedregistry": MustParseCid("bafk2bzacebp2r56wxadvfzpfbmqwfi3dlnwpmoc5u4tau2hfftbkuafkhye64"),
+		"reward":           MustParseCid("bafk2bzaceaajyncjxcrl7wbb6ukzkueyqz4uyekxpmtn4mpndkf7ksmggopzq"),
+		"storagemarket":    MustParseCid("bafk2bzaced6cexdcinwjhtfvuxgkxukiejp3goylaxtvhqfd24rs5z7g2z7dm"),
+		"storageminer":     MustParseCid("bafk2bzacecw6jvvfu62jkwsa4vzmn262cjrrxh6wza6nvjsyg5aeix7rzgmbe"),
+		"storagepower":     MustParseCid("bafk2bzacedexrf5qplrrl5xzijfrthjdqwodfs5e6zj5kpztc7qnywbqdyiii"),
+		"system":           MustParseCid("bafk2bzacecp4roanbxq3bflftlkipsoqqxio5etjjnzxus5pcu7lq43fnxb34"),
+		"verifiedregistry": MustParseCid("bafk2bzaceandytrgcnuvizfi47sijbqh6c243vjtzlzumexm6kjv7s7hye45g"),
 	},
 }, {
 	Network: "testing-fake-proofs",
@@ -765,24 +765,24 @@ var EmbeddedBuiltinActorsMetadata []*BuiltinActorsMetadata = []*BuiltinActorsMet
 }, {
 	Network:      "testing-fake-proofs",
 	Version:      12,
-	BundleGitTag: "v11.0.0",
-	ManifestCid:  MustParseCid("bafy2bzacecojemqglhzzhjnhgtrcbsgkyv67ziytvtbhwlr4ym4oxqofv7zui"),
+	BundleGitTag: "v12.0.0-rc.1",
+	ManifestCid:  MustParseCid("bafy2bzacedtskkmrkkzairdi66syrmvfpydg63ro4dlmmqeta5krnur4hcp3a"),
 	Actors: map[string]cid.Cid{
-		"account":          MustParseCid("bafk2bzaceccerssb3tgel6ukdghlwvs7dxsolj4fpkgn7dh7owzwapqb6ejpw"),
-		"cron":             MustParseCid("bafk2bzacebtfl6fczxnitrqqjhyefskf3asyn3gzuvqcddieoqfsaddk5fd4q"),
-		"datacap":          MustParseCid("bafk2bzacediikc55y6uzmnhucf4mik6rqpjulwvgp5gdibogxjhgbvusmzff2"),
-		"eam":              MustParseCid("bafk2bzaceazqi5ezossp6kvqogaaba6hxlfarqgniktmb7iy5qonha3eflz6m"),
-		"ethaccount":       MustParseCid("bafk2bzaceb77ospgfqqmf67v23wkyeg7lr2mu53ybaacu3bslx7s7nhttdueo"),
-		"evm":              MustParseCid("bafk2bzacedvgt7mv22hux4vrnklylq7qmw43kfrqwam6wdsfzkdnaewr33qbu"),
-		"init":             MustParseCid("bafk2bzacealzb3nk2oypway5ubz3hs5py5ok5tuw545454vg4d3mwbslef4js"),
-		"multisig":         MustParseCid("bafk2bzacec45ppn4hrwizmopp2v2atkxw35tb6yem6uqhqilrv7aiaknnnxmu"),
-		"paymentchannel":   MustParseCid("bafk2bzaceajbr3t6cngzh3katqteflbcrtwtdgbthnlfemon5tg6rytf2uonw"),
+		"account":          MustParseCid("bafk2bzacea74qqkfvacykmq5emzqblh4f4nmxdkiyixxpzs7kkcfnbfa7cb6m"),
+		"cron":             MustParseCid("bafk2bzacecotbu7k6awdzfzakf7g5iaas6gswtunjnnb2xm2klqoshjgb4imy"),
+		"datacap":          MustParseCid("bafk2bzaceduhmqcyailiwdupt2ottfzh5hcrjoyeyiaipf3idk3mu7y3uz2mc"),
+		"eam":              MustParseCid("bafk2bzaceb2yzzw6dcmcmhnt3mqnm4kah66f23pc4escnto3vwa552t6ctr7i"),
+		"ethaccount":       MustParseCid("bafk2bzacebwkvvbmttkcjjlicp4ineozc52i5sc6d46pcoq6lzzs2p5i2youa"),
+		"evm":              MustParseCid("bafk2bzacedetwacs6wmoksxwjlbpp4442uav7fd3pagadejm2cph7ucym7eck"),
+		"init":             MustParseCid("bafk2bzacedhpoycn4sz7dragmbo5yqjspqriydxhplqdeguaqck2hmq5hgwqg"),
+		"multisig":         MustParseCid("bafk2bzaceacc3m23yvnpzoeekstqtr2acutfv4zvsgncorjdrsucymjohzxs4"),
+		"paymentchannel":   MustParseCid("bafk2bzaceac6i76vfexefqf6qgebkhkf2cb4g664d5nmfh2dric5spgykevd2"),
 		"placeholder":      MustParseCid("bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro"),
-		"reward":           MustParseCid("bafk2bzacea7ycf53kbq4robcuh3ziy7qwwhaqamc5krn3lugypgpxhlewdaiq"),
-		"storagemarket":    MustParseCid("bafk2bzacedskmbcpaeb6bezs32szh52jrukvihobluadauayroo5gzrt32tkm"),
-		"storageminer":     MustParseCid("bafk2bzacebqeztpa5exztccqjwqhan5droiy7ga6zekm6f2gzxoe655vneczm"),
-		"storagepower":     MustParseCid("bafk2bzaceb2tlyuwxncdxsh3hc4fwcjnpxaijkiv54ustwdjbrqabxdsc27km"),
-		"system":           MustParseCid("bafk2bzaceaatvscbnkv36ixhtt2zel4er5oskxevgumh5gegqkv7uzah36f24"),
-		"verifiedregistry": MustParseCid("bafk2bzacebp2r56wxadvfzpfbmqwfi3dlnwpmoc5u4tau2hfftbkuafkhye64"),
+		"reward":           MustParseCid("bafk2bzaceaajyncjxcrl7wbb6ukzkueyqz4uyekxpmtn4mpndkf7ksmggopzq"),
+		"storagemarket":    MustParseCid("bafk2bzaced6cexdcinwjhtfvuxgkxukiejp3goylaxtvhqfd24rs5z7g2z7dm"),
+		"storageminer":     MustParseCid("bafk2bzacea54x727xteh3tl46mitigy6cldqusqjxiwni65wrpofidh62k2ds"),
+		"storagepower":     MustParseCid("bafk2bzacecdwijcbbryinjtm27pdinqqkyzoskri24pwsvsadwcq2alkkjpnc"),
+		"system":           MustParseCid("bafk2bzacecp4roanbxq3bflftlkipsoqqxio5etjjnzxus5pcu7lq43fnxb34"),
+		"verifiedregistry": MustParseCid("bafk2bzaceandytrgcnuvizfi47sijbqh6c243vjtzlzumexm6kjv7s7hye45g"),
 	},
 }}
diff --git a/build/genesis/butterflynet.car b/build/genesis/butterflynet.car
index 30ec609ec..962964c35 100644
Binary files a/build/genesis/butterflynet.car and b/build/genesis/butterflynet.car differ
diff --git a/build/openrpc/full.json.gz b/build/openrpc/full.json.gz
index b4c139b97..9bcb54b58 100644
Binary files a/build/openrpc/full.json.gz and b/build/openrpc/full.json.gz differ
diff --git a/build/openrpc/gateway.json.gz b/build/openrpc/gateway.json.gz
index 1c6f717c0..e0c6c61b8 100644
Binary files a/build/openrpc/gateway.json.gz and b/build/openrpc/gateway.json.gz differ
diff --git a/build/openrpc/miner.json.gz b/build/openrpc/miner.json.gz
index 3696821da..817595c7b 100644
Binary files a/build/openrpc/miner.json.gz and b/build/openrpc/miner.json.gz differ
diff --git a/build/openrpc/worker.json.gz b/build/openrpc/worker.json.gz
index 207ba656e..6adce6cb9 100644
Binary files a/build/openrpc/worker.json.gz and b/build/openrpc/worker.json.gz differ
diff --git a/build/params_butterfly.go b/build/params_butterfly.go
index 7d3b613c9..96b71d3c0 100644
--- a/build/params_butterfly.go
+++ b/build/params_butterfly.go
@@ -19,7 +19,7 @@ var DrandSchedule = map[abi.ChainEpoch]DrandEnum{
 	0: DrandMainnet,
 }
 
-const GenesisNetworkVersion = network.Version18
+const GenesisNetworkVersion = network.Version20
 
 var NetworkBundle = "butterflynet"
 var BundleOverrides map[actorstypes.Version]string
@@ -52,13 +52,10 @@ const UpgradeOhSnapHeight = -18
 const UpgradeSkyrHeight = -19
 const UpgradeSharkHeight = -20
 const UpgradeHyggeHeight = -21
+const UpgradeLightningHeight = -22
+const UpgradeThunderHeight = -23
 
-const UpgradeLightningHeight = 50
-
-const UpgradeThunderHeight = UpgradeLightningHeight + 360
-
-// ??????????
-const UpgradeWatermelonHeight = 999999999999999
+const UpgradeWatermelonHeight = 400
 
 var SupportedProofTypes = []abi.RegisteredSealProof{
 	abi.RegisteredSealProof_StackedDrg512MiBV1,
diff --git a/build/params_calibnet.go b/build/params_calibnet.go
index 4081d4c1d..5831d30bb 100644
--- a/build/params_calibnet.go
+++ b/build/params_calibnet.go
@@ -79,8 +79,8 @@ const UpgradeLightningHeight = 489094
 // 2023-04-21T16:00:00Z
 const UpgradeThunderHeight = UpgradeLightningHeight + 3120
 
-// ??????????
-const UpgradeWatermelonHeight = 999999999999999
+// 2023-10-19T13:00:00Z
+const UpgradeWatermelonHeight = 1013134
 
 var SupportedProofTypes = []abi.RegisteredSealProof{
 	abi.RegisteredSealProof_StackedDrg32GiBV1,
diff --git a/chain/actors/builtin/market/state.go.template b/chain/actors/builtin/market/state.go.template
index bbaa5c775..1eab9d743 100644
--- a/chain/actors/builtin/market/state.go.template
+++ b/chain/actors/builtin/market/state.go.template
@@ -19,7 +19,7 @@ import (
 	"github.com/filecoin-project/lotus/chain/actors/adt"
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/types"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 
 {{if (le .v 7)}}
diff --git a/chain/actors/builtin/market/v0.go b/chain/actors/builtin/market/v0.go
index c0a628b47..ca6970dfa 100644
--- a/chain/actors/builtin/market/v0.go
+++ b/chain/actors/builtin/market/v0.go
@@ -11,13 +11,13 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 	market0 "github.com/filecoin-project/specs-actors/actors/builtin/market"
 	adt0 "github.com/filecoin-project/specs-actors/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v10.go b/chain/actors/builtin/market/v10.go
index aaa0ee0f1..878f0d465 100644
--- a/chain/actors/builtin/market/v10.go
+++ b/chain/actors/builtin/market/v10.go
@@ -17,11 +17,11 @@ import (
 	market10 "github.com/filecoin-project/go-state-types/builtin/v10/market"
 	adt10 "github.com/filecoin-project/go-state-types/builtin/v10/util/adt"
 	markettypes "github.com/filecoin-project/go-state-types/builtin/v9/market"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v11.go b/chain/actors/builtin/market/v11.go
index a816e3409..a64272209 100644
--- a/chain/actors/builtin/market/v11.go
+++ b/chain/actors/builtin/market/v11.go
@@ -17,11 +17,11 @@ import (
 	market11 "github.com/filecoin-project/go-state-types/builtin/v11/market"
 	adt11 "github.com/filecoin-project/go-state-types/builtin/v11/util/adt"
 	markettypes "github.com/filecoin-project/go-state-types/builtin/v9/market"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v12.go b/chain/actors/builtin/market/v12.go
index 3532fc4f4..56e651a9b 100644
--- a/chain/actors/builtin/market/v12.go
+++ b/chain/actors/builtin/market/v12.go
@@ -17,11 +17,11 @@ import (
 	market12 "github.com/filecoin-project/go-state-types/builtin/v12/market"
 	adt12 "github.com/filecoin-project/go-state-types/builtin/v12/util/adt"
 	markettypes "github.com/filecoin-project/go-state-types/builtin/v9/market"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v2.go b/chain/actors/builtin/market/v2.go
index 89ffdde8f..ba84e3b03 100644
--- a/chain/actors/builtin/market/v2.go
+++ b/chain/actors/builtin/market/v2.go
@@ -11,13 +11,13 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 	market2 "github.com/filecoin-project/specs-actors/v2/actors/builtin/market"
 	adt2 "github.com/filecoin-project/specs-actors/v2/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v3.go b/chain/actors/builtin/market/v3.go
index f4d073ed8..f6a0891e7 100644
--- a/chain/actors/builtin/market/v3.go
+++ b/chain/actors/builtin/market/v3.go
@@ -11,13 +11,13 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 	market3 "github.com/filecoin-project/specs-actors/v3/actors/builtin/market"
 	adt3 "github.com/filecoin-project/specs-actors/v3/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v4.go b/chain/actors/builtin/market/v4.go
index 422a30cbb..629e833b6 100644
--- a/chain/actors/builtin/market/v4.go
+++ b/chain/actors/builtin/market/v4.go
@@ -11,13 +11,13 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 	market4 "github.com/filecoin-project/specs-actors/v4/actors/builtin/market"
 	adt4 "github.com/filecoin-project/specs-actors/v4/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v5.go b/chain/actors/builtin/market/v5.go
index b30decb03..892588979 100644
--- a/chain/actors/builtin/market/v5.go
+++ b/chain/actors/builtin/market/v5.go
@@ -11,13 +11,13 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 	market5 "github.com/filecoin-project/specs-actors/v5/actors/builtin/market"
 	adt5 "github.com/filecoin-project/specs-actors/v5/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v6.go b/chain/actors/builtin/market/v6.go
index 377b278ae..b57d49f91 100644
--- a/chain/actors/builtin/market/v6.go
+++ b/chain/actors/builtin/market/v6.go
@@ -13,13 +13,13 @@ import (
 	rlepluslazy "github.com/filecoin-project/go-bitfield/rle"
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 	market6 "github.com/filecoin-project/specs-actors/v6/actors/builtin/market"
 	adt6 "github.com/filecoin-project/specs-actors/v6/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v7.go b/chain/actors/builtin/market/v7.go
index cd4607cbe..56a1db328 100644
--- a/chain/actors/builtin/market/v7.go
+++ b/chain/actors/builtin/market/v7.go
@@ -13,13 +13,13 @@ import (
 	rlepluslazy "github.com/filecoin-project/go-bitfield/rle"
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 	market7 "github.com/filecoin-project/specs-actors/v7/actors/builtin/market"
 	adt7 "github.com/filecoin-project/specs-actors/v7/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v8.go b/chain/actors/builtin/market/v8.go
index 5cce06d3a..9c68ee1fd 100644
--- a/chain/actors/builtin/market/v8.go
+++ b/chain/actors/builtin/market/v8.go
@@ -16,11 +16,11 @@ import (
 	market8 "github.com/filecoin-project/go-state-types/builtin/v8/market"
 	adt8 "github.com/filecoin-project/go-state-types/builtin/v8/util/adt"
 	markettypes "github.com/filecoin-project/go-state-types/builtin/v9/market"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/market/v9.go b/chain/actors/builtin/market/v9.go
index 095c20850..d692c15cc 100644
--- a/chain/actors/builtin/market/v9.go
+++ b/chain/actors/builtin/market/v9.go
@@ -17,11 +17,11 @@ import (
 	market9 "github.com/filecoin-project/go-state-types/builtin/v9/market"
 	markettypes "github.com/filecoin-project/go-state-types/builtin/v9/market"
 	adt9 "github.com/filecoin-project/go-state-types/builtin/v9/util/adt"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/manifest"
 
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
+	verifregtypes "github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/chain/actors/builtin/miner/actor.go.template b/chain/actors/builtin/miner/actor.go.template
index 7319ee9c5..b4ad3a4b5 100644
--- a/chain/actors/builtin/miner/actor.go.template
+++ b/chain/actors/builtin/miner/actor.go.template
@@ -154,7 +154,7 @@ type Partition interface {
 
 type SectorOnChainInfo = minertypes.SectorOnChainInfo
 
-func PreferredSealProofTypeFromWindowPoStType(nver network.Version, proof abi.RegisteredPoStProof) (abi.RegisteredSealProof, error) {
+func PreferredSealProofTypeFromWindowPoStType(nver network.Version, proof abi.RegisteredPoStProof, configWantSynthetic bool) (abi.RegisteredSealProof, error) {
 	// We added support for the new proofs in network version 7, and removed support for the old
 	// ones in network version 8.
 	if nver < network.Version7 {
@@ -174,17 +174,34 @@ func PreferredSealProofTypeFromWindowPoStType(nver network.Version, proof abi.Re
 		}
 	}
 
+	if nver < MinSyntheticPoRepVersion || !configWantSynthetic {
+		switch proof {
+		case abi.RegisteredPoStProof_StackedDrgWindow2KiBV1, abi.RegisteredPoStProof_StackedDrgWindow2KiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg2KiBV1_1, nil
+		case abi.RegisteredPoStProof_StackedDrgWindow8MiBV1, abi.RegisteredPoStProof_StackedDrgWindow8MiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg8MiBV1_1, nil
+		case abi.RegisteredPoStProof_StackedDrgWindow512MiBV1, abi.RegisteredPoStProof_StackedDrgWindow512MiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg512MiBV1_1, nil
+		case abi.RegisteredPoStProof_StackedDrgWindow32GiBV1, abi.RegisteredPoStProof_StackedDrgWindow32GiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg32GiBV1_1, nil
+		case abi.RegisteredPoStProof_StackedDrgWindow64GiBV1, abi.RegisteredPoStProof_StackedDrgWindow64GiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg64GiBV1_1, nil
+		default:
+			return -1, xerrors.Errorf("unrecognized window post type: %d", proof)
+		}
+	}
+
 	switch proof {
 	case abi.RegisteredPoStProof_StackedDrgWindow2KiBV1, abi.RegisteredPoStProof_StackedDrgWindow2KiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg2KiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg2KiBV1_1_Feat_SyntheticPoRep, nil
 	case abi.RegisteredPoStProof_StackedDrgWindow8MiBV1, abi.RegisteredPoStProof_StackedDrgWindow8MiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg8MiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg8MiBV1_1_Feat_SyntheticPoRep, nil
 	case abi.RegisteredPoStProof_StackedDrgWindow512MiBV1, abi.RegisteredPoStProof_StackedDrgWindow512MiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg512MiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg512MiBV1_1_Feat_SyntheticPoRep, nil
 	case abi.RegisteredPoStProof_StackedDrgWindow32GiBV1, abi.RegisteredPoStProof_StackedDrgWindow32GiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg32GiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg32GiBV1_1_Feat_SyntheticPoRep, nil
 	case abi.RegisteredPoStProof_StackedDrgWindow64GiBV1, abi.RegisteredPoStProof_StackedDrgWindow64GiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg64GiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg64GiBV1_1_Feat_SyntheticPoRep, nil
 	default:
 		return -1, xerrors.Errorf("unrecognized window post type: %d", proof)
 	}
@@ -213,8 +230,37 @@ type PendingBeneficiaryChange = minertypes.PendingBeneficiaryChange
 type WorkerKeyChange = minertypes.WorkerKeyChange
 type SectorPreCommitOnChainInfo = minertypes.SectorPreCommitOnChainInfo
 type SectorPreCommitInfo = minertypes.SectorPreCommitInfo
+type SubmitWindowedPoStParams = minertypes.SubmitWindowedPoStParams
+type PoStPartition = minertypes.PoStPartition
+type RecoveryDeclaration = minertypes.RecoveryDeclaration
+type FaultDeclaration = minertypes.FaultDeclaration
+type DeclareFaultsRecoveredParams = minertypes.DeclareFaultsRecoveredParams
+type DeclareFaultsParams = minertypes.DeclareFaultsParams
+type ProveCommitAggregateParams = minertypes.ProveCommitAggregateParams
+type ProveCommitSectorParams = minertypes.ProveCommitSectorParams
+type ProveReplicaUpdatesParams = minertypes.ProveReplicaUpdatesParams
+type ReplicaUpdate = minertypes.ReplicaUpdate
+type PreCommitSectorBatchParams = minertypes.PreCommitSectorBatchParams
+type PreCommitSectorBatchParams2 = minertypes.PreCommitSectorBatchParams2
+type ExtendSectorExpiration2Params = minertypes.ExtendSectorExpiration2Params
+type SectorClaim = minertypes.SectorClaim
+type ExpirationExtension2 = minertypes.ExpirationExtension2
+type CompactPartitionsParams = minertypes.CompactPartitionsParams
+type WithdrawBalanceParams = minertypes.WithdrawBalanceParams
+
+var QAPowerMax = minertypes.QAPowerMax
+
 type WindowPostVerifyInfo = proof.WindowPoStVerifyInfo
 
+var WPoStProvingPeriod = func() abi.ChainEpoch { return minertypes.WPoStProvingPeriod }
+var WPoStChallengeWindow = func() abi.ChainEpoch { return minertypes.WPoStChallengeWindow }
+
+const WPoStPeriodDeadlines = minertypes.WPoStPeriodDeadlines
+const WPoStChallengeLookback = minertypes.WPoStChallengeLookback
+const FaultDeclarationCutoff = minertypes.FaultDeclarationCutoff
+const MinAggregatedSectors = minertypes.MinAggregatedSectors
+const MinSectorExpiration = minertypes.MinSectorExpiration
+
 type SectorExpiration struct {
 	OnTime abi.ChainEpoch
 
diff --git a/chain/actors/builtin/miner/miner.go b/chain/actors/builtin/miner/miner.go
index 3ad17b033..1637cdade 100644
--- a/chain/actors/builtin/miner/miner.go
+++ b/chain/actors/builtin/miner/miner.go
@@ -214,7 +214,7 @@ type Partition interface {
 
 type SectorOnChainInfo = minertypes.SectorOnChainInfo
 
-func PreferredSealProofTypeFromWindowPoStType(nver network.Version, proof abi.RegisteredPoStProof) (abi.RegisteredSealProof, error) {
+func PreferredSealProofTypeFromWindowPoStType(nver network.Version, proof abi.RegisteredPoStProof, configWantSynthetic bool) (abi.RegisteredSealProof, error) {
 	// We added support for the new proofs in network version 7, and removed support for the old
 	// ones in network version 8.
 	if nver < network.Version7 {
@@ -234,17 +234,34 @@ func PreferredSealProofTypeFromWindowPoStType(nver network.Version, proof abi.Re
 		}
 	}
 
+	if nver < MinSyntheticPoRepVersion || !configWantSynthetic {
+		switch proof {
+		case abi.RegisteredPoStProof_StackedDrgWindow2KiBV1, abi.RegisteredPoStProof_StackedDrgWindow2KiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg2KiBV1_1, nil
+		case abi.RegisteredPoStProof_StackedDrgWindow8MiBV1, abi.RegisteredPoStProof_StackedDrgWindow8MiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg8MiBV1_1, nil
+		case abi.RegisteredPoStProof_StackedDrgWindow512MiBV1, abi.RegisteredPoStProof_StackedDrgWindow512MiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg512MiBV1_1, nil
+		case abi.RegisteredPoStProof_StackedDrgWindow32GiBV1, abi.RegisteredPoStProof_StackedDrgWindow32GiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg32GiBV1_1, nil
+		case abi.RegisteredPoStProof_StackedDrgWindow64GiBV1, abi.RegisteredPoStProof_StackedDrgWindow64GiBV1_1:
+			return abi.RegisteredSealProof_StackedDrg64GiBV1_1, nil
+		default:
+			return -1, xerrors.Errorf("unrecognized window post type: %d", proof)
+		}
+	}
+
 	switch proof {
 	case abi.RegisteredPoStProof_StackedDrgWindow2KiBV1, abi.RegisteredPoStProof_StackedDrgWindow2KiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg2KiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg2KiBV1_1_Feat_SyntheticPoRep, nil
 	case abi.RegisteredPoStProof_StackedDrgWindow8MiBV1, abi.RegisteredPoStProof_StackedDrgWindow8MiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg8MiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg8MiBV1_1_Feat_SyntheticPoRep, nil
 	case abi.RegisteredPoStProof_StackedDrgWindow512MiBV1, abi.RegisteredPoStProof_StackedDrgWindow512MiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg512MiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg512MiBV1_1_Feat_SyntheticPoRep, nil
 	case abi.RegisteredPoStProof_StackedDrgWindow32GiBV1, abi.RegisteredPoStProof_StackedDrgWindow32GiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg32GiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg32GiBV1_1_Feat_SyntheticPoRep, nil
 	case abi.RegisteredPoStProof_StackedDrgWindow64GiBV1, abi.RegisteredPoStProof_StackedDrgWindow64GiBV1_1:
-		return abi.RegisteredSealProof_StackedDrg64GiBV1_1, nil
+		return abi.RegisteredSealProof_StackedDrg64GiBV1_1_Feat_SyntheticPoRep, nil
 	default:
 		return -1, xerrors.Errorf("unrecognized window post type: %d", proof)
 	}
@@ -273,8 +290,37 @@ type PendingBeneficiaryChange = minertypes.PendingBeneficiaryChange
 type WorkerKeyChange = minertypes.WorkerKeyChange
 type SectorPreCommitOnChainInfo = minertypes.SectorPreCommitOnChainInfo
 type SectorPreCommitInfo = minertypes.SectorPreCommitInfo
+type SubmitWindowedPoStParams = minertypes.SubmitWindowedPoStParams
+type PoStPartition = minertypes.PoStPartition
+type RecoveryDeclaration = minertypes.RecoveryDeclaration
+type FaultDeclaration = minertypes.FaultDeclaration
+type DeclareFaultsRecoveredParams = minertypes.DeclareFaultsRecoveredParams
+type DeclareFaultsParams = minertypes.DeclareFaultsParams
+type ProveCommitAggregateParams = minertypes.ProveCommitAggregateParams
+type ProveCommitSectorParams = minertypes.ProveCommitSectorParams
+type ProveReplicaUpdatesParams = minertypes.ProveReplicaUpdatesParams
+type ReplicaUpdate = minertypes.ReplicaUpdate
+type PreCommitSectorBatchParams = minertypes.PreCommitSectorBatchParams
+type PreCommitSectorBatchParams2 = minertypes.PreCommitSectorBatchParams2
+type ExtendSectorExpiration2Params = minertypes.ExtendSectorExpiration2Params
+type SectorClaim = minertypes.SectorClaim
+type ExpirationExtension2 = minertypes.ExpirationExtension2
+type CompactPartitionsParams = minertypes.CompactPartitionsParams
+type WithdrawBalanceParams = minertypes.WithdrawBalanceParams
+
+var QAPowerMax = minertypes.QAPowerMax
+
 type WindowPostVerifyInfo = proof.WindowPoStVerifyInfo
 
+var WPoStProvingPeriod = func() abi.ChainEpoch { return minertypes.WPoStProvingPeriod }
+var WPoStChallengeWindow = func() abi.ChainEpoch { return minertypes.WPoStChallengeWindow }
+
+const WPoStPeriodDeadlines = minertypes.WPoStPeriodDeadlines
+const WPoStChallengeLookback = minertypes.WPoStChallengeLookback
+const FaultDeclarationCutoff = minertypes.FaultDeclarationCutoff
+const MinAggregatedSectors = minertypes.MinAggregatedSectors
+const MinSectorExpiration = minertypes.MinSectorExpiration
+
 type SectorExpiration struct {
 	OnTime abi.ChainEpoch
 
diff --git a/chain/actors/builtin/miner/utils.go b/chain/actors/builtin/miner/utils.go
index dae3d3bc2..072eab986 100644
--- a/chain/actors/builtin/miner/utils.go
+++ b/chain/actors/builtin/miner/utils.go
@@ -8,6 +8,8 @@ import (
 	"github.com/filecoin-project/go-state-types/network"
 )
 
+var MinSyntheticPoRepVersion = network.Version21
+
 func AllPartSectors(mas State, sget func(Partition) (bitfield.BitField, error)) (bitfield.BitField, error) {
 	var parts []bitfield.BitField
 
@@ -31,7 +33,7 @@ func AllPartSectors(mas State, sget func(Partition) (bitfield.BitField, error))
 
 // SealProofTypeFromSectorSize returns preferred seal proof type for creating
 // new miner actors and new sectors
-func SealProofTypeFromSectorSize(ssize abi.SectorSize, nv network.Version) (abi.RegisteredSealProof, error) {
+func SealProofTypeFromSectorSize(ssize abi.SectorSize, nv network.Version, synthetic bool) (abi.RegisteredSealProof, error) {
 	switch {
 	case nv < network.Version7:
 		switch ssize {
@@ -49,25 +51,49 @@ func SealProofTypeFromSectorSize(ssize abi.SectorSize, nv network.Version) (abi.
 			return 0, xerrors.Errorf("unsupported sector size for miner: %v", ssize)
 		}
 	case nv >= network.Version7:
+		var v abi.RegisteredSealProof
 		switch ssize {
 		case 2 << 10:
-			return abi.RegisteredSealProof_StackedDrg2KiBV1_1, nil
+			v = abi.RegisteredSealProof_StackedDrg2KiBV1_1
 		case 8 << 20:
-			return abi.RegisteredSealProof_StackedDrg8MiBV1_1, nil
+			v = abi.RegisteredSealProof_StackedDrg8MiBV1_1
 		case 512 << 20:
-			return abi.RegisteredSealProof_StackedDrg512MiBV1_1, nil
+			v = abi.RegisteredSealProof_StackedDrg512MiBV1_1
 		case 32 << 30:
-			return abi.RegisteredSealProof_StackedDrg32GiBV1_1, nil
+			v = abi.RegisteredSealProof_StackedDrg32GiBV1_1
 		case 64 << 30:
-			return abi.RegisteredSealProof_StackedDrg64GiBV1_1, nil
+			v = abi.RegisteredSealProof_StackedDrg64GiBV1_1
 		default:
 			return 0, xerrors.Errorf("unsupported sector size for miner: %v", ssize)
 		}
+
+		if nv >= MinSyntheticPoRepVersion && synthetic {
+			return toSynthetic(v)
+		} else {
+			return v, nil
+		}
 	}
 
 	return 0, xerrors.Errorf("unsupported network version")
 }
 
+func toSynthetic(in abi.RegisteredSealProof) (abi.RegisteredSealProof, error) {
+	switch in {
+	case abi.RegisteredSealProof_StackedDrg2KiBV1_1:
+		return abi.RegisteredSealProof_StackedDrg2KiBV1_1_Feat_SyntheticPoRep, nil
+	case abi.RegisteredSealProof_StackedDrg8MiBV1_1:
+		return abi.RegisteredSealProof_StackedDrg8MiBV1_1_Feat_SyntheticPoRep, nil
+	case abi.RegisteredSealProof_StackedDrg512MiBV1_1:
+		return abi.RegisteredSealProof_StackedDrg512MiBV1_1_Feat_SyntheticPoRep, nil
+	case abi.RegisteredSealProof_StackedDrg32GiBV1_1:
+		return abi.RegisteredSealProof_StackedDrg32GiBV1_1_Feat_SyntheticPoRep, nil
+	case abi.RegisteredSealProof_StackedDrg64GiBV1_1:
+		return abi.RegisteredSealProof_StackedDrg64GiBV1_1_Feat_SyntheticPoRep, nil
+	default:
+		return 0, xerrors.Errorf("unsupported conversion to synthetic: %v", in)
+	}
+}
+
 // WindowPoStProofTypeFromSectorSize returns preferred post proof type for creating
 // new miner actors and new sectors
 func WindowPoStProofTypeFromSectorSize(ssize abi.SectorSize, nv network.Version) (abi.RegisteredPoStProof, error) {
diff --git a/chain/actors/builtin/verifreg/actor.go.template b/chain/actors/builtin/verifreg/actor.go.template
index 9b779a68d..991c6717b 100644
--- a/chain/actors/builtin/verifreg/actor.go.template
+++ b/chain/actors/builtin/verifreg/actor.go.template
@@ -97,4 +97,6 @@ func AllCodes() []cid.Cid {
 type Allocation = verifregtypes.Allocation
 type AllocationId = verifregtypes.AllocationId
 type Claim = verifregtypes.Claim
-type ClaimId = verifregtypes.ClaimId
\ No newline at end of file
+type ClaimId = verifregtypes.ClaimId
+
+const NoAllocationID = verifregtypes.NoAllocationID
diff --git a/chain/actors/builtin/verifreg/verifreg.go b/chain/actors/builtin/verifreg/verifreg.go
index e79a790c7..de906f521 100644
--- a/chain/actors/builtin/verifreg/verifreg.go
+++ b/chain/actors/builtin/verifreg/verifreg.go
@@ -168,3 +168,5 @@ type Allocation = verifregtypes.Allocation
 type AllocationId = verifregtypes.AllocationId
 type Claim = verifregtypes.Claim
 type ClaimId = verifregtypes.ClaimId
+
+const NoAllocationID = verifregtypes.NoAllocationID
diff --git a/chain/actors/policy/policy.go b/chain/actors/policy/policy.go
index d680def37..a0e4728fe 100644
--- a/chain/actors/policy/policy.go
+++ b/chain/actors/policy/policy.go
@@ -560,8 +560,53 @@ func GetWinningPoStSectorSetLookback(nwVer network.Version) abi.ChainEpoch {
 	return ChainFinality
 }
 
-func GetMaxSectorExpirationExtension() abi.ChainEpoch {
-	return miner12.MaxSectorExpirationExtension
+func GetMaxSectorExpirationExtension(nv network.Version) (abi.ChainEpoch, error) {
+	v, err := actorstypes.VersionForNetwork(nv)
+	if err != nil {
+		return 0, xerrors.Errorf("failed to get actors version: %w", err)
+	}
+	switch v {
+
+	case actorstypes.Version0:
+		return miner0.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version2:
+		return miner2.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version3:
+		return miner3.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version4:
+		return miner4.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version5:
+		return miner5.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version6:
+		return miner6.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version7:
+		return miner7.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version8:
+		return miner8.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version9:
+		return miner9.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version10:
+		return miner10.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version11:
+		return miner11.MaxSectorExpirationExtension, nil
+
+	case actorstypes.Version12:
+		return miner12.MaxSectorExpirationExtension, nil
+
+	default:
+		return 0, xerrors.Errorf("unsupported network version")
+	}
+
 }
 
 func GetMinSectorExpiration() abi.ChainEpoch {
@@ -577,7 +622,8 @@ func GetMaxPoStPartitions(nv network.Version, p abi.RegisteredPoStProof) (int, e
 	if err != nil {
 		return 0, err
 	}
-	return int(uint64(maxSectors) / sectorsPerPart), nil
+
+	return min(miner12.PoStedPartitionsMax, int(uint64(maxSectors)/sectorsPerPart)), nil
 }
 
 func GetDefaultAggregationProof() abi.RegisteredAggregationProof {
@@ -820,3 +866,10 @@ func AggregatePreCommitNetworkFee(nwVer network.Version, aggregateSize int, base
 		return big.Zero(), xerrors.Errorf("unsupported network version")
 	}
 }
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
diff --git a/chain/actors/policy/policy.go.template b/chain/actors/policy/policy.go.template
index 3eb39836a..8803c97e6 100644
--- a/chain/actors/policy/policy.go.template
+++ b/chain/actors/policy/policy.go.template
@@ -223,8 +223,20 @@ func GetWinningPoStSectorSetLookback(nwVer network.Version) abi.ChainEpoch {
 	return ChainFinality
 }
 
-func GetMaxSectorExpirationExtension() abi.ChainEpoch {
-	return miner{{.latestVersion}}.MaxSectorExpirationExtension
+func GetMaxSectorExpirationExtension(nv network.Version) (abi.ChainEpoch, error) {
+	v, err := actorstypes.VersionForNetwork(nv)
+	if err != nil {
+		return 0, xerrors.Errorf("failed to get actors version: %w", err)
+	}
+	switch v {
+		{{range .versions}}
+			case actorstypes.Version{{.}}:
+				return miner{{.}}.MaxSectorExpirationExtension, nil
+		{{end}}
+	default:
+		return 0, xerrors.Errorf("unsupported network version")
+	}
+
 }
 
 func GetMinSectorExpiration() abi.ChainEpoch {
@@ -240,7 +252,8 @@ func GetMaxPoStPartitions(nv network.Version, p abi.RegisteredPoStProof) (int, e
 	if err != nil {
 		return 0, err
 	}
-	return int(uint64(maxSectors) / sectorsPerPart), nil
+
+	return min(miner{{.latestVersion}}.PoStedPartitionsMax, int(uint64(maxSectors) / sectorsPerPart)), nil
 }
 
 func GetDefaultAggregationProof() abi.RegisteredAggregationProof {
@@ -329,3 +342,10 @@ func AggregatePreCommitNetworkFee(nwVer network.Version, aggregateSize int, base
 		return big.Zero(), xerrors.Errorf("unsupported network version")
 	}
 }
+
+func min(a, b int) int {
+    if a < b {
+        return a
+    }
+    return b
+}
\ No newline at end of file
diff --git a/chain/actors/policy/policy_test.go b/chain/actors/policy/policy_test.go
index 726fca95a..5fd4bd7b0 100644
--- a/chain/actors/policy/policy_test.go
+++ b/chain/actors/policy/policy_test.go
@@ -7,7 +7,6 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/go-state-types/network"
 	builtin0 "github.com/filecoin-project/specs-actors/actors/builtin"
 	miner0 "github.com/filecoin-project/specs-actors/actors/builtin/miner"
 	paych0 "github.com/filecoin-project/specs-actors/actors/builtin/paych"
@@ -74,13 +73,3 @@ func TestPartitionSizes(t *testing.T) {
 		require.Equal(t, sizeOld, sizeNew)
 	}
 }
-
-func TestPoStSize(t *testing.T) {
-	//stm: @BLOCKCHAIN_POLICY_GET_MAX_POST_PARTITIONS_001
-	v12PoStSize, err := GetMaxPoStPartitions(network.Version12, abi.RegisteredPoStProof_StackedDrgWindow64GiBV1)
-	require.Equal(t, 4, v12PoStSize)
-	require.NoError(t, err)
-	v13PoStSize, err := GetMaxPoStPartitions(network.Version13, abi.RegisteredPoStProof_StackedDrgWindow64GiBV1)
-	require.NoError(t, err)
-	require.Equal(t, 10, v13PoStSize)
-}
diff --git a/chain/exchange/cbor_gen.go b/chain/exchange/cbor_gen.go
index d1eb271e9..e66b6d798 100644
--- a/chain/exchange/cbor_gen.go
+++ b/chain/exchange/cbor_gen.go
@@ -43,9 +43,11 @@ func (t *Request) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.Head {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.Head: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 
 	// t.Length (uint64) (uint64)
@@ -106,12 +108,25 @@ func (t *Request) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		c, err := cbg.ReadCid(cr)
-		if err != nil {
-			return xerrors.Errorf("reading cid field t.Head failed: %w", err)
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.Head[i]: %w", err)
+				}
+
+				t.Head[i] = c
+
+			}
 		}
-		t.Head[i] = c
 	}
 
 	// t.Length (uint64) (uint64)
@@ -173,7 +188,7 @@ func (t *Response) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.ErrorMessage))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.ErrorMessage)); err != nil {
+	if _, err := cw.WriteString(string(t.ErrorMessage)); err != nil {
 		return err
 	}
 
@@ -260,13 +275,32 @@ func (t *Response) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v BSTipSet
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+					t.Chain[i] = new(BSTipSet)
+					if err := t.Chain[i].UnmarshalCBOR(cr); err != nil {
+						return xerrors.Errorf("unmarshaling t.Chain[i] pointer: %w", err)
+					}
+				}
+
+			}
 		}
-
-		t.Chain[i] = &v
 	}
 
 	return nil
@@ -317,9 +351,11 @@ func (t *CompactedMessages) MarshalCBOR(w io.Writer) error {
 			return err
 		}
 		for _, v := range v {
-			if err := cw.CborWriteHeader(cbg.MajUnsignedInt, uint64(v)); err != nil {
+
+			if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(v)); err != nil {
 				return err
 			}
+
 		}
 	}
 
@@ -354,9 +390,11 @@ func (t *CompactedMessages) MarshalCBOR(w io.Writer) error {
 			return err
 		}
 		for _, v := range v {
-			if err := cw.CborWriteHeader(cbg.MajUnsignedInt, uint64(v)); err != nil {
+
+			if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(v)); err != nil {
 				return err
 			}
+
 		}
 	}
 	return nil
@@ -405,13 +443,32 @@ func (t *CompactedMessages) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v types.Message
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+					t.Bls[i] = new(types.Message)
+					if err := t.Bls[i].UnmarshalCBOR(cr); err != nil {
+						return xerrors.Errorf("unmarshaling t.Bls[i] pointer: %w", err)
+					}
+				}
+
+			}
 		}
-
-		t.Bls[i] = &v
 	}
 
 	// t.BlsIncludes ([][]uint64) (slice)
@@ -438,6 +495,9 @@ func (t *CompactedMessages) UnmarshalCBOR(r io.Reader) (err error) {
 			var maj byte
 			var extra uint64
 			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
 			maj, extra, err = cr.ReadHeader()
 			if err != nil {
@@ -457,17 +517,27 @@ func (t *CompactedMessages) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for j := 0; j < int(extra); j++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				maj, val, err := cr.ReadHeader()
-				if err != nil {
-					return xerrors.Errorf("failed to read uint64 for t.BlsIncludes[i] slice: %w", err)
+					{
+
+						maj, extra, err = cr.ReadHeader()
+						if err != nil {
+							return err
+						}
+						if maj != cbg.MajUnsignedInt {
+							return fmt.Errorf("wrong type for uint64 field")
+						}
+						t.BlsIncludes[i][j] = uint64(extra)
+
+					}
 				}
-
-				if maj != cbg.MajUnsignedInt {
-					return xerrors.Errorf("value read for array t.BlsIncludes[i] was not a uint, instead got %d", maj)
-				}
-
-				t.BlsIncludes[i][j] = uint64(val)
 			}
 
 		}
@@ -493,13 +563,32 @@ func (t *CompactedMessages) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v types.SignedMessage
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+					t.Secpk[i] = new(types.SignedMessage)
+					if err := t.Secpk[i].UnmarshalCBOR(cr); err != nil {
+						return xerrors.Errorf("unmarshaling t.Secpk[i] pointer: %w", err)
+					}
+				}
+
+			}
 		}
-
-		t.Secpk[i] = &v
 	}
 
 	// t.SecpkIncludes ([][]uint64) (slice)
@@ -526,6 +615,9 @@ func (t *CompactedMessages) UnmarshalCBOR(r io.Reader) (err error) {
 			var maj byte
 			var extra uint64
 			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
 			maj, extra, err = cr.ReadHeader()
 			if err != nil {
@@ -545,17 +637,27 @@ func (t *CompactedMessages) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for j := 0; j < int(extra); j++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				maj, val, err := cr.ReadHeader()
-				if err != nil {
-					return xerrors.Errorf("failed to read uint64 for t.SecpkIncludes[i] slice: %w", err)
+					{
+
+						maj, extra, err = cr.ReadHeader()
+						if err != nil {
+							return err
+						}
+						if maj != cbg.MajUnsignedInt {
+							return fmt.Errorf("wrong type for uint64 field")
+						}
+						t.SecpkIncludes[i][j] = uint64(extra)
+
+					}
 				}
-
-				if maj != cbg.MajUnsignedInt {
-					return xerrors.Errorf("value read for array t.SecpkIncludes[i] was not a uint, instead got %d", maj)
-				}
-
-				t.SecpkIncludes[i][j] = uint64(val)
 			}
 
 		}
@@ -642,13 +744,32 @@ func (t *BSTipSet) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v types.BlockHeader
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+					t.Blocks[i] = new(types.BlockHeader)
+					if err := t.Blocks[i].UnmarshalCBOR(cr); err != nil {
+						return xerrors.Errorf("unmarshaling t.Blocks[i] pointer: %w", err)
+					}
+				}
+
+			}
 		}
-
-		t.Blocks[i] = &v
 	}
 
 	// t.Messages (exchange.CompactedMessages) (struct)
diff --git a/chain/gen/genesis/genesis.go b/chain/gen/genesis/genesis.go
index 3e8848021..8ec657479 100644
--- a/chain/gen/genesis/genesis.go
+++ b/chain/gen/genesis/genesis.go
@@ -578,7 +578,7 @@ func MakeGenesisBlock(ctx context.Context, j journal.Journal, bs bstore.Blocksto
 	}
 
 	// setup Storage Miners
-	stateroot, err = SetupStorageMiners(ctx, cs, sys, stateroot, template.Miners, template.NetworkVersion)
+	stateroot, err = SetupStorageMiners(ctx, cs, sys, stateroot, template.Miners, template.NetworkVersion, false)
 	if err != nil {
 		return nil, xerrors.Errorf("setup miners failed: %w", err)
 	}
diff --git a/chain/gen/genesis/miners.go b/chain/gen/genesis/miners.go
index 2d9942464..0bac282d2 100644
--- a/chain/gen/genesis/miners.go
+++ b/chain/gen/genesis/miners.go
@@ -79,7 +79,7 @@ func mkFakedSigSyscalls(base vm.SyscallBuilder) vm.SyscallBuilder {
 }
 
 // Note: Much of this is brittle, if the methodNum / param / return changes, it will break things
-func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sys vm.SyscallBuilder, sroot cid.Cid, miners []genesis.Miner, nv network.Version) (cid.Cid, error) {
+func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sys vm.SyscallBuilder, sroot cid.Cid, miners []genesis.Miner, nv network.Version, synthetic bool) (cid.Cid, error) {
 
 	cst := cbor.NewCborStore(cs.StateBlockstore())
 	av, err := actorstypes.VersionForNetwork(nv)
@@ -125,14 +125,18 @@ func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sys vm.Syscal
 		sectorWeight []abi.StoragePower
 	}, len(miners))
 
-	maxPeriods := policy.GetMaxSectorExpirationExtension() / minertypes.WPoStProvingPeriod
+	maxLifetime, err := policy.GetMaxSectorExpirationExtension(nv)
+	if err != nil {
+		return cid.Undef, xerrors.Errorf("failed to get max extension: %w", err)
+	}
+	maxPeriods := maxLifetime / minertypes.WPoStProvingPeriod
 	rawPow, qaPow := big.NewInt(0), big.NewInt(0)
 	for i, m := range miners {
 		// Create miner through power actor
 		i := i
 		m := m
 
-		spt, err := miner.SealProofTypeFromSectorSize(m.SectorSize, nv)
+		spt, err := miner.SealProofTypeFromSectorSize(m.SectorSize, nv, synthetic)
 		if err != nil {
 			return cid.Undef, err
 		}
diff --git a/chain/types/cbor_gen.go b/chain/types/cbor_gen.go
index a9040613f..fe8e7e3fe 100644
--- a/chain/types/cbor_gen.go
+++ b/chain/types/cbor_gen.go
@@ -91,9 +91,11 @@ func (t *BlockHeader) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.Parents {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.Parents: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 
 	// t.ParentWeight (big.Int) (struct)
@@ -249,13 +251,22 @@ func (t *BlockHeader) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v BeaconEntry
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				if err := t.BeaconEntries[i].UnmarshalCBOR(cr); err != nil {
+					return xerrors.Errorf("unmarshaling t.BeaconEntries[i]: %w", err)
+				}
+
+			}
 		}
-
-		t.BeaconEntries[i] = v
 	}
 
 	// t.WinPoStProof ([]proof.PoStProof) (slice)
@@ -278,13 +289,22 @@ func (t *BlockHeader) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v proof.PoStProof
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				if err := t.WinPoStProof[i].UnmarshalCBOR(cr); err != nil {
+					return xerrors.Errorf("unmarshaling t.WinPoStProof[i]: %w", err)
+				}
+
+			}
 		}
-
-		t.WinPoStProof[i] = v
 	}
 
 	// t.Parents ([]cid.Cid) (slice)
@@ -307,12 +327,25 @@ func (t *BlockHeader) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		c, err := cbg.ReadCid(cr)
-		if err != nil {
-			return xerrors.Errorf("reading cid field t.Parents failed: %w", err)
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.Parents[i]: %w", err)
+				}
+
+				t.Parents[i] = c
+
+			}
 		}
-		t.Parents[i] = c
 	}
 
 	// t.ParentWeight (big.Int) (struct)
@@ -1318,9 +1351,11 @@ func (t *BlockMsg) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.BlsMessages {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.BlsMessages: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 
 	// t.SecpkMessages ([]cid.Cid) (slice)
@@ -1332,9 +1367,11 @@ func (t *BlockMsg) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.SecpkMessages {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.SecpkMessages: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 	return nil
 }
@@ -1401,12 +1438,25 @@ func (t *BlockMsg) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		c, err := cbg.ReadCid(cr)
-		if err != nil {
-			return xerrors.Errorf("reading cid field t.BlsMessages failed: %w", err)
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.BlsMessages[i]: %w", err)
+				}
+
+				t.BlsMessages[i] = c
+
+			}
 		}
-		t.BlsMessages[i] = c
 	}
 
 	// t.SecpkMessages ([]cid.Cid) (slice)
@@ -1429,12 +1479,25 @@ func (t *BlockMsg) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		c, err := cbg.ReadCid(cr)
-		if err != nil {
-			return xerrors.Errorf("reading cid field t.SecpkMessages failed: %w", err)
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.SecpkMessages[i]: %w", err)
+				}
+
+				t.SecpkMessages[i] = c
+
+			}
 		}
-		t.SecpkMessages[i] = c
 	}
 
 	return nil
@@ -1463,9 +1526,11 @@ func (t *ExpTipSet) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.Cids {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.Cids: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 
 	// t.Blocks ([]*types.BlockHeader) (slice)
@@ -1538,12 +1603,25 @@ func (t *ExpTipSet) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		c, err := cbg.ReadCid(cr)
-		if err != nil {
-			return xerrors.Errorf("reading cid field t.Cids failed: %w", err)
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.Cids[i]: %w", err)
+				}
+
+				t.Cids[i] = c
+
+			}
 		}
-		t.Cids[i] = c
 	}
 
 	// t.Blocks ([]*types.BlockHeader) (slice)
@@ -1566,13 +1644,32 @@ func (t *ExpTipSet) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v BlockHeader
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+					t.Blocks[i] = new(BlockHeader)
+					if err := t.Blocks[i].UnmarshalCBOR(cr); err != nil {
+						return xerrors.Errorf("unmarshaling t.Blocks[i] pointer: %w", err)
+					}
+				}
+
+			}
 		}
-
-		t.Blocks[i] = &v
 	}
 
 	// t.Height (abi.ChainEpoch) (int64)
@@ -1933,13 +2030,22 @@ func (t *Event) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v EventEntry
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				if err := t.Entries[i].UnmarshalCBOR(cr); err != nil {
+					return xerrors.Errorf("unmarshaling t.Entries[i]: %w", err)
+				}
+
+			}
 		}
-
-		t.Entries[i] = v
 	}
 
 	return nil
@@ -1972,7 +2078,7 @@ func (t *EventEntry) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Key))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Key)); err != nil {
+	if _, err := cw.WriteString(string(t.Key)); err != nil {
 		return err
 	}
 
@@ -2103,7 +2209,7 @@ func (t *GasTrace) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Name))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Name)); err != nil {
+	if _, err := cw.WriteString(string(t.Name)); err != nil {
 		return err
 	}
 
@@ -2756,13 +2862,32 @@ func (t *ExecutionTrace) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v GasTrace
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+					t.GasCharges[i] = new(GasTrace)
+					if err := t.GasCharges[i].UnmarshalCBOR(cr); err != nil {
+						return xerrors.Errorf("unmarshaling t.GasCharges[i] pointer: %w", err)
+					}
+				}
+
+			}
 		}
-
-		t.GasCharges[i] = &v
 	}
 
 	// t.Subcalls ([]types.ExecutionTrace) (slice)
@@ -2785,13 +2910,22 @@ func (t *ExecutionTrace) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v ExecutionTrace
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				if err := t.Subcalls[i].UnmarshalCBOR(cr); err != nil {
+					return xerrors.Errorf("unmarshaling t.Subcalls[i]: %w", err)
+				}
+
+			}
 		}
-
-		t.Subcalls[i] = v
 	}
 
 	return nil
diff --git a/cmd/lotus-bench/main.go b/cmd/lotus-bench/main.go
index f9cbe0d8b..1db788498 100644
--- a/cmd/lotus-bench/main.go
+++ b/cmd/lotus-bench/main.go
@@ -553,7 +553,7 @@ var sealBenchCmd = &cli.Command{
 
 		if !skipc2 {
 			log.Info("generating winning post candidates")
-			wipt, err := spt(sectorSize).RegisteredWinningPoStProof()
+			wipt, err := spt(sectorSize, false).RegisteredWinningPoStProof()
 			if err != nil {
 				return err
 			}
@@ -771,7 +771,7 @@ func runSeals(sb *ffiwrapper.Sealer, sbfs *basicfs.Provider, numSectors int, par
 				Miner:  mid,
 				Number: i,
 			},
-			ProofType: spt(sectorSize),
+			ProofType: spt(sectorSize, false),
 		}
 
 		start := time.Now()
@@ -803,7 +803,7 @@ func runSeals(sb *ffiwrapper.Sealer, sbfs *basicfs.Provider, numSectors int, par
 							Miner:  mid,
 							Number: i,
 						},
-						ProofType: spt(sectorSize),
+						ProofType: spt(sectorSize, false),
 					}
 
 					start := time.Now()
@@ -1014,7 +1014,7 @@ var proveCmd = &cli.Command{
 				Miner:  abi.ActorID(mid),
 				Number: abi.SectorNumber(c2in.SectorNum),
 			},
-			ProofType: spt(abi.SectorSize(c2in.SectorSize)),
+			ProofType: spt(abi.SectorSize(c2in.SectorSize), false),
 		}
 
 		fmt.Printf("----\nstart proof computation\n")
@@ -1045,8 +1045,8 @@ func bps(sectorSize abi.SectorSize, sectorNum int, d time.Duration) string {
 	return types.SizeStr(types.BigInt{Int: bps}) + "/s"
 }
 
-func spt(ssize abi.SectorSize) abi.RegisteredSealProof {
-	spt, err := miner.SealProofTypeFromSectorSize(ssize, build.TestNetworkVersion)
+func spt(ssize abi.SectorSize, synth bool) abi.RegisteredSealProof {
+	spt, err := miner.SealProofTypeFromSectorSize(ssize, build.TestNetworkVersion, synth)
 	if err != nil {
 		panic(err)
 	}
diff --git a/cmd/lotus-bench/simple.go b/cmd/lotus-bench/simple.go
index 6e1dea0db..8ae5713ad 100644
--- a/cmd/lotus-bench/simple.go
+++ b/cmd/lotus-bench/simple.go
@@ -186,7 +186,7 @@ var simpleAddPiece = &cli.Command{
 				Miner:  mid,
 				Number: 1,
 			},
-			ProofType: spt(sectorSize),
+			ProofType: spt(sectorSize, false),
 		}
 
 		data, err := os.Open(cctx.Args().First())
@@ -223,6 +223,10 @@ var simplePreCommit1 = &cli.Command{
 			Usage: "pass miner address (only necessary if using existing sectorbuilder)",
 			Value: "t01000",
 		},
+		&cli.BoolFlag{
+			Name:  "synthetic",
+			Usage: "generate synthetic PoRep proofs",
+		},
 	},
 	ArgsUsage: "[unsealed] [sealed] [cache] [[piece cid] [piece size]]...",
 	Action: func(cctx *cli.Context) error {
@@ -259,7 +263,7 @@ var simplePreCommit1 = &cli.Command{
 				Miner:  mid,
 				Number: 1,
 			},
-			ProofType: spt(sectorSize),
+			ProofType: spt(sectorSize, cctx.Bool("synthetic")),
 		}
 
 		var ticket [32]byte // all zero
@@ -297,6 +301,10 @@ var simplePreCommit2 = &cli.Command{
 			Usage: "pass miner address (only necessary if using existing sectorbuilder)",
 			Value: "t01000",
 		},
+		&cli.BoolFlag{
+			Name:  "synthetic",
+			Usage: "generate synthetic PoRep proofs",
+		},
 	},
 	ArgsUsage: "[sealed] [cache] [pc1 out]",
 	Action: func(cctx *cli.Context) error {
@@ -337,7 +345,7 @@ var simplePreCommit2 = &cli.Command{
 				Miner:  mid,
 				Number: 1,
 			},
-			ProofType: spt(sectorSize),
+			ProofType: spt(sectorSize, cctx.Bool("synthetic")),
 		}
 
 		start := time.Now()
@@ -368,6 +376,10 @@ var simpleCommit1 = &cli.Command{
 			Usage: "pass miner address (only necessary if using existing sectorbuilder)",
 			Value: "t01000",
 		},
+		&cli.BoolFlag{
+			Name:  "synthetic",
+			Usage: "generate synthetic PoRep proofs",
+		},
 	},
 	ArgsUsage: "[sealed] [cache] [comm D] [comm R] [c1out.json]",
 	Action: func(cctx *cli.Context) error {
@@ -403,7 +415,7 @@ var simpleCommit1 = &cli.Command{
 				Miner:  mid,
 				Number: 1,
 			},
-			ProofType: spt(sectorSize),
+			ProofType: spt(sectorSize, cctx.Bool("synthetic")),
 		}
 
 		start := time.Now()
@@ -469,6 +481,10 @@ var simpleCommit2 = &cli.Command{
 			Usage: "pass miner address (only necessary if using existing sectorbuilder)",
 			Value: "t01000",
 		},
+		&cli.BoolFlag{
+			Name:  "synthetic",
+			Usage: "generate synthetic PoRep proofs",
+		},
 	},
 	Action: func(c *cli.Context) error {
 		if c.Bool("no-gpu") {
@@ -515,7 +531,7 @@ var simpleCommit2 = &cli.Command{
 				Miner:  abi.ActorID(mid),
 				Number: abi.SectorNumber(c2in.SectorNum),
 			},
-			ProofType: spt(abi.SectorSize(c2in.SectorSize)),
+			ProofType: spt(abi.SectorSize(c2in.SectorSize), c.Bool("synthetic")),
 		}
 
 		start := time.Now()
@@ -573,7 +589,7 @@ var simpleWindowPost = &cli.Command{
 			return xerrors.Errorf("parse commr: %w", err)
 		}
 
-		wpt, err := spt(sectorSize).RegisteredWindowPoStProof()
+		wpt, err := spt(sectorSize, false).RegisteredWindowPoStProof()
 		if err != nil {
 			return err
 		}
@@ -593,7 +609,7 @@ var simpleWindowPost = &cli.Command{
 
 		vp, err := ffi.GenerateSingleVanillaProof(ffi.PrivateSectorInfo{
 			SectorInfo: prf.SectorInfo{
-				SealProof:    spt(sectorSize),
+				SealProof:    spt(sectorSize, false),
 				SectorNumber: sn,
 				SealedCID:    commr,
 			},
@@ -660,7 +676,7 @@ var simpleWinningPost = &cli.Command{
 			return xerrors.Errorf("parse commr: %w", err)
 		}
 
-		wpt, err := spt(sectorSize).RegisteredWinningPoStProof()
+		wpt, err := spt(sectorSize, false).RegisteredWinningPoStProof()
 		if err != nil {
 			return err
 		}
@@ -680,7 +696,7 @@ var simpleWinningPost = &cli.Command{
 
 		vp, err := ffi.GenerateSingleVanillaProof(ffi.PrivateSectorInfo{
 			SectorInfo: prf.SectorInfo{
-				SealProof:    spt(sectorSize),
+				SealProof:    spt(sectorSize, false),
 				SectorNumber: sn,
 				SealedCID:    commr,
 			},
@@ -763,7 +779,7 @@ var simpleReplicaUpdate = &cli.Command{
 				Miner:  mid,
 				Number: 1,
 			},
-			ProofType: spt(sectorSize),
+			ProofType: spt(sectorSize, false),
 		}
 
 		start := time.Now()
@@ -831,7 +847,7 @@ var simpleProveReplicaUpdate1 = &cli.Command{
 				Miner:  mid,
 				Number: 1,
 			},
-			ProofType: spt(sectorSize),
+			ProofType: spt(sectorSize, false),
 		}
 
 		start := time.Now()
@@ -918,7 +934,7 @@ var simpleProveReplicaUpdate2 = &cli.Command{
 				Miner:  mid,
 				Number: 1,
 			},
-			ProofType: spt(sectorSize),
+			ProofType: spt(sectorSize, false),
 		}
 
 		start := time.Now()
diff --git a/cmd/lotus-miner/actor.go b/cmd/lotus-miner/actor.go
index f0c52278a..320c4e6de 100644
--- a/cmd/lotus-miner/actor.go
+++ b/cmd/lotus-miner/actor.go
@@ -21,6 +21,7 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin"
+	minerV12 "github.com/filecoin-project/go-state-types/builtin/v12/miner"
 	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/network"
 
@@ -49,6 +50,7 @@ var actorCmd = &cli.Command{
 		actorProposeChangeWorker,
 		actorConfirmChangeWorker,
 		actorCompactAllocatedCmd,
+		actorMovePartitionsCmd,
 		actorProposeChangeBeneficiary,
 		actorConfirmChangeBeneficiary,
 	},
@@ -1286,13 +1288,149 @@ var actorConfirmChangeBeneficiary = &cli.Command{
 	},
 }
 
+var actorMovePartitionsCmd = &cli.Command{
+	Name:  "move-partitions",
+	Usage: "move deadline of specified partitions from one to another",
+	Flags: []cli.Flag{
+		&cli.Int64SliceFlag{
+			Name:  "partition-indices",
+			Usage: "Indices of partitions to update, separated by comma",
+		},
+		&cli.Uint64Flag{
+			Name:  "orig-deadline",
+			Usage: "Deadline to move partition from",
+		},
+		&cli.Uint64Flag{
+			Name:  "dest-deadline",
+			Usage: "Deadline to move partition to",
+		},
+		&cli.BoolFlag{
+			Name:  "really-do-it",
+			Usage: "Actually send transaction performing the action",
+			Value: false,
+		},
+	},
+	Action: func(cctx *cli.Context) error {
+		if !cctx.Bool("really-do-it") {
+			fmt.Println("Pass --really-do-it to actually execute this action")
+			return nil
+		}
+
+		if cctx.Args().Present() {
+			return fmt.Errorf("please use flags to provide arguments")
+		}
+
+		ctx := lcli.ReqContext(cctx)
+
+		minerApi, closer, err := lcli.GetStorageMinerAPI(cctx)
+		if err != nil {
+			return err
+		}
+		defer closer()
+
+		maddr, err := minerApi.ActorAddress(ctx)
+		if err != nil {
+			return err
+		}
+
+		fmt.Printf("Miner: %s\n", color.BlueString("%s", maddr))
+
+		fullNodeApi, acloser, err := lcli.GetFullNodeAPI(cctx)
+		if err != nil {
+			return err
+		}
+		defer acloser()
+
+		minfo, err := fullNodeApi.StateMinerInfo(ctx, maddr, types.EmptyTSK)
+		if err != nil {
+			return err
+		}
+
+		origDeadline := cctx.Uint64("orig-deadline")
+		if origDeadline > miner.WPoStPeriodDeadlines {
+			return fmt.Errorf("orig-deadline %d out of range", origDeadline)
+		}
+		destDeadline := cctx.Uint64("dest-deadline")
+		if destDeadline > miner.WPoStPeriodDeadlines {
+			return fmt.Errorf("dest-deadline %d out of range", destDeadline)
+		}
+		if origDeadline == destDeadline {
+			return fmt.Errorf("dest-desdline cannot be the same as orig-deadline")
+		}
+
+		partitions := cctx.Int64Slice("partition-indices")
+		if len(partitions) == 0 {
+			return fmt.Errorf("must include at least one partition to move")
+		}
+
+		curPartitions, err := fullNodeApi.StateMinerPartitions(ctx, maddr, origDeadline, types.EmptyTSK)
+		if err != nil {
+			return fmt.Errorf("getting partitions for deadline %d: %w", origDeadline, err)
+		}
+		if len(partitions) > len(curPartitions) {
+			return fmt.Errorf("partition size(%d) cannot be bigger than current partition size(%d) for deadline %d", len(partitions), len(curPartitions), origDeadline)
+		}
+
+		fmt.Printf("Moving %d paritions\n", len(partitions))
+
+		partitionsBf := bitfield.New()
+		for _, partition := range partitions {
+			if partition >= int64(len(curPartitions)) {
+				return fmt.Errorf("partition index(%d) doesn't exist", partition)
+			}
+			partitionsBf.Set(uint64(partition))
+		}
+
+		params := minerV12.MovePartitionsParams{
+			OrigDeadline: origDeadline,
+			DestDeadline: destDeadline,
+			Partitions:   partitionsBf,
+		}
+
+		serializedParams, err := actors.SerializeParams(&params)
+		if err != nil {
+			return fmt.Errorf("serializing params: %w", err)
+		}
+
+		smsg, err := fullNodeApi.MpoolPushMessage(ctx, &types.Message{
+			From:   minfo.Worker,
+			To:     maddr,
+			Method: builtin.MethodsMiner.MovePartitions,
+			Value:  big.Zero(),
+			Params: serializedParams,
+		}, nil)
+		if err != nil {
+			return fmt.Errorf("mpool push: %w", err)
+		}
+
+		fmt.Println("MovePartitions Message CID:", smsg.Cid())
+
+		// wait for it to get mined into a block
+		fmt.Println("Waiting for block confirmation...")
+		wait, err := fullNodeApi.StateWaitMsg(ctx, smsg.Cid(), build.MessageConfidence)
+		if err != nil {
+			return err
+		}
+
+		// check it executed successfully
+		if wait.Receipt.ExitCode.IsError() {
+			fmt.Println("Moving partitions failed!")
+			return err
+		}
+
+		fmt.Println("Move partition confirmed")
+
+		return nil
+	},
+}
+
 var actorCompactAllocatedCmd = &cli.Command{
 	Name:  "compact-allocated",
 	Usage: "compact allocated sectors bitfield",
 	Flags: []cli.Flag{
 		&cli.Uint64Flag{
 			Name:  "mask-last-offset",
-			Usage: "Mask sector IDs from 0 to 'higest_allocated - offset'",
+			Usage: "Mask sector IDs from 0 to 'highest_allocated - offset'",
 		},
 		&cli.Uint64Flag{
 			Name:  "mask-upto-n",
diff --git a/cmd/lotus-miner/precommits-info.go b/cmd/lotus-miner/precommits-info.go
index 0ce757537..3f9e8c927 100644
--- a/cmd/lotus-miner/precommits-info.go
+++ b/cmd/lotus-miner/precommits-info.go
@@ -7,7 +7,6 @@ import (
 	cbor "github.com/ipfs/go-ipld-cbor"
 	"github.com/urfave/cli/v2"
 
-	minertypes "github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/specs-actors/v7/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/blockstore"
@@ -39,8 +38,8 @@ var sectorPreCommitsCmd = &cli.Command{
 		if err != nil {
 			return err
 		}
-		preCommitSector := make([]minertypes.SectorPreCommitOnChainInfo, 0)
-		err = mst.ForEachPrecommittedSector(func(info minertypes.SectorPreCommitOnChainInfo) error {
+		preCommitSector := make([]miner.SectorPreCommitOnChainInfo, 0)
+		err = mst.ForEachPrecommittedSector(func(info miner.SectorPreCommitOnChainInfo) error {
 			preCommitSector = append(preCommitSector, info)
 			return err
 		})
diff --git a/cmd/lotus-miner/sectors.go b/cmd/lotus-miner/sectors.go
index 96e132bbd..07cc2e795 100644
--- a/cmd/lotus-miner/sectors.go
+++ b/cmd/lotus-miner/sectors.go
@@ -24,14 +24,13 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/network"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/blockstore"
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
-	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/actors/policy"
 	"github.com/filecoin-project/lotus/chain/types"
@@ -193,14 +192,14 @@ var sectorsStatusCmd = &cli.Command{
 			}
 
 			tbs := blockstore.NewTieredBstore(blockstore.NewAPIBlockstore(fullApi), blockstore.NewMemory())
-			mas, err := lminer.Load(adt.WrapStore(ctx, cbor.NewCborStore(tbs)), mact)
+			mas, err := miner.Load(adt.WrapStore(ctx, cbor.NewCborStore(tbs)), mact)
 			if err != nil {
 				return err
 			}
 
 			errFound := errors.New("found")
-			if err := mas.ForEachDeadline(func(dlIdx uint64, dl lminer.Deadline) error {
-				return dl.ForEachPartition(func(partIdx uint64, part lminer.Partition) error {
+			if err := mas.ForEachDeadline(func(dlIdx uint64, dl miner.Deadline) error {
+				return dl.ForEachPartition(func(partIdx uint64, part miner.Partition) error {
 					pas, err := part.AllSectors()
 					if err != nil {
 						return err
@@ -847,7 +846,12 @@ var sectorsCheckExpireCmd = &cli.Command{
 
 		for _, sector := range sectors {
 			MaxExpiration := sector.Activation + policy.GetSectorMaxLifetime(sector.SealProof, nv)
-			MaxExtendNow := currEpoch + policy.GetMaxSectorExpirationExtension()
+			maxExtension, err := policy.GetMaxSectorExpirationExtension(nv)
+			if err != nil {
+				return xerrors.Errorf("failed to get max extension: %w", err)
+			}
+
+			MaxExtendNow := currEpoch + maxExtension
 
 			if MaxExtendNow > MaxExpiration {
 				MaxExtendNow = MaxExpiration
@@ -1075,22 +1079,22 @@ var sectorsExtendCmd = &cli.Command{
 
 		tbs := blockstore.NewTieredBstore(blockstore.NewAPIBlockstore(fullApi), blockstore.NewMemory())
 		adtStore := adt.WrapStore(ctx, cbor.NewCborStore(tbs))
-		mas, err := lminer.Load(adtStore, mact)
+		mas, err := miner.Load(adtStore, mact)
 		if err != nil {
 			return err
 		}
 
-		activeSectorsLocation := make(map[abi.SectorNumber]*lminer.SectorLocation, len(activeSet))
+		activeSectorsLocation := make(map[abi.SectorNumber]*miner.SectorLocation, len(activeSet))
 
-		if err := mas.ForEachDeadline(func(dlIdx uint64, dl lminer.Deadline) error {
-			return dl.ForEachPartition(func(partIdx uint64, part lminer.Partition) error {
+		if err := mas.ForEachDeadline(func(dlIdx uint64, dl miner.Deadline) error {
+			return dl.ForEachPartition(func(partIdx uint64, part miner.Partition) error {
 				pas, err := part.ActiveSectors()
 				if err != nil {
 					return err
 				}
 
 				return pas.ForEach(func(i uint64) error {
-					activeSectorsLocation[abi.SectorNumber(i)] = &lminer.SectorLocation{
+					activeSectorsLocation[abi.SectorNumber(i)] = &miner.SectorLocation{
 						Deadline:  dlIdx,
 						Partition: partIdx,
 					}
@@ -1177,7 +1181,7 @@ var sectorsExtendCmd = &cli.Command{
 			return diff <= abi.ChainEpoch(cctx.Int64("tolerance"))
 		}
 
-		extensions := map[lminer.SectorLocation]map[abi.ChainEpoch][]abi.SectorNumber{}
+		extensions := map[miner.SectorLocation]map[abi.ChainEpoch][]abi.SectorNumber{}
 		for _, si := range sis {
 			extension := abi.ChainEpoch(cctx.Int64("extension"))
 			newExp := si.Expiration + extension
@@ -1186,7 +1190,12 @@ var sectorsExtendCmd = &cli.Command{
 				newExp = abi.ChainEpoch(cctx.Int64("new-expiration"))
 			}
 
-			maxExtendNow := currEpoch + policy.GetMaxSectorExpirationExtension()
+			maxExtension, err := policy.GetMaxSectorExpirationExtension(nv)
+			if err != nil {
+				return xerrors.Errorf("failed to get max extension: %w", err)
+			}
+
+			maxExtendNow := currEpoch + maxExtension
 			if newExp > maxExtendNow {
 				newExp = maxExtendNow
 			}
@@ -1741,7 +1750,7 @@ var sectorsCapacityCollateralCmd = &cli.Command{
 			return err
 		}
 
-		spt, err := lminer.PreferredSealProofTypeFromWindowPoStType(nv, mi.WindowPoStProofType)
+		spt, err := miner.PreferredSealProofTypeFromWindowPoStType(nv, mi.WindowPoStProofType, false)
 		if err != nil {
 			return err
 		}
@@ -1756,7 +1765,12 @@ var sectorsCapacityCollateralCmd = &cli.Command{
 				return err
 			}
 
-			pci.Expiration = policy.GetMaxSectorExpirationExtension() + h.Height()
+			maxExtension, err := policy.GetMaxSectorExpirationExtension(nv)
+			if err != nil {
+				return xerrors.Errorf("failed to get max extension: %w", err)
+			}
+
+			pci.Expiration = maxExtension + h.Height()
 		}
 
 		pc, err := nApi.StateMinerInitialPledgeCollateral(ctx, maddr, pci, types.EmptyTSK)
@@ -1910,7 +1924,7 @@ var sectorsExpiredCmd = &cli.Command{
 		}
 
 		tbs := blockstore.NewTieredBstore(blockstore.NewAPIBlockstore(fullApi), blockstore.NewMemory())
-		mas, err := lminer.Load(adt.WrapStore(ctx, cbor.NewCborStore(tbs)), mact)
+		mas, err := miner.Load(adt.WrapStore(ctx, cbor.NewCborStore(tbs)), mact)
 		if err != nil {
 			return err
 		}
@@ -1926,8 +1940,8 @@ var sectorsExpiredCmd = &cli.Command{
 			return xerrors.Errorf("intersecting bitfields: %w", err)
 		}
 
-		if err := mas.ForEachDeadline(func(dlIdx uint64, dl lminer.Deadline) error {
-			return dl.ForEachPartition(func(partIdx uint64, part lminer.Partition) error {
+		if err := mas.ForEachDeadline(func(dlIdx uint64, dl miner.Deadline) error {
+			return dl.ForEachPartition(func(partIdx uint64, part miner.Partition) error {
 				live, err := part.LiveSectors()
 				if err != nil {
 					return err
diff --git a/cmd/lotus-seed/main.go b/cmd/lotus-seed/main.go
index 863a508f2..d362804c9 100644
--- a/cmd/lotus-seed/main.go
+++ b/cmd/lotus-seed/main.go
@@ -137,7 +137,9 @@ var preSealCmd = &cli.Command{
 			nv = network.Version(c.Uint64("network-version"))
 		}
 
-		spt, err := miner.SealProofTypeFromSectorSize(sectorSize, nv)
+		var synthetic = false // there's little reason to have this for a seed.
+
+		spt, err := miner.SealProofTypeFromSectorSize(sectorSize, nv, synthetic)
 		if err != nil {
 			return err
 		}
diff --git a/cmd/lotus-shed/main.go b/cmd/lotus-shed/main.go
index aab3d1ef3..a5b66a096 100644
--- a/cmd/lotus-shed/main.go
+++ b/cmd/lotus-shed/main.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
+	"runtime/pprof"
 
 	logging "github.com/ipfs/go-log/v2"
 	"github.com/urfave/cli/v2"
@@ -116,10 +117,31 @@ func main() {
 				Name:  "log-level",
 				Value: "info",
 			},
+			&cli.StringFlag{
+				Name:  "pprof",
+				Usage: "specify name of file for writing cpu profile to",
+			},
 		},
 		Before: func(cctx *cli.Context) error {
+			if prof := cctx.String("pprof"); prof != "" {
+				profile, err := os.Create(prof)
+				if err != nil {
+					return err
+				}
+
+				if err := pprof.StartCPUProfile(profile); err != nil {
+					return err
+				}
+			}
+
 			return logging.SetLogLevel("lotus-shed", cctx.String("log-level"))
 		},
+		After: func(cctx *cli.Context) error {
+			if prof := cctx.String("pprof"); prof != "" {
+				pprof.StopCPUProfile()
+			}
+			return nil
+		},
 	}
 
 	// terminate early on ctrl+c
diff --git a/cmd/lotus-shed/migrations.go b/cmd/lotus-shed/migrations.go
index 82a1afddf..96e4747b7 100644
--- a/cmd/lotus-shed/migrations.go
+++ b/cmd/lotus-shed/migrations.go
@@ -21,6 +21,7 @@ import (
 	"github.com/filecoin-project/go-state-types/builtin"
 	v10 "github.com/filecoin-project/go-state-types/builtin/v10"
 	v11 "github.com/filecoin-project/go-state-types/builtin/v11"
+	v12 "github.com/filecoin-project/go-state-types/builtin/v12"
 	market8 "github.com/filecoin-project/go-state-types/builtin/v8/market"
 	adt8 "github.com/filecoin-project/go-state-types/builtin/v8/util/adt"
 	v9 "github.com/filecoin-project/go-state-types/builtin/v9"
@@ -243,6 +244,8 @@ func getMigrationFuncsForNetwork(nv network.Version) (UpgradeActorsFunc, PreUpgr
 		return filcns.UpgradeActorsV10, filcns.PreUpgradeActorsV10, checkNv18Invariants, nil
 	case network.Version19:
 		return filcns.UpgradeActorsV11, filcns.PreUpgradeActorsV11, checkNv19Invariants, nil
+	case network.Version21:
+		return filcns.UpgradeActorsV12, filcns.PreUpgradeActorsV12, checkNv21Invariants, nil
 	default:
 		return nil, nil, nil, xerrors.Errorf("migration not implemented for nv%d", nv)
 	}
@@ -252,6 +255,38 @@ type UpgradeActorsFunc = func(context.Context, *stmgr.StateManager, stmgr.Migrat
 type PreUpgradeActorsFunc = func(context.Context, *stmgr.StateManager, stmgr.MigrationCache, cid.Cid, abi.ChainEpoch, *types.TipSet) error
 type CheckInvariantsFunc = func(context.Context, cid.Cid, cid.Cid, blockstore.Blockstore, abi.ChainEpoch) error
 
+func checkNv21Invariants(ctx context.Context, oldStateRootCid cid.Cid, newStateRootCid cid.Cid, bs blockstore.Blockstore, epoch abi.ChainEpoch) error {
+
+	actorStore := store.ActorStore(ctx, bs)
+	startTime := time.Now()
+
+	// Load the new state root.
+	var newStateRoot types.StateRoot
+	if err := actorStore.Get(ctx, newStateRootCid, &newStateRoot); err != nil {
+		return xerrors.Errorf("failed to decode state root: %w", err)
+	}
+
+	actorCodeCids, err := actors.GetActorCodeIDs(actorstypes.Version12)
+	if err != nil {
+		return err
+	}
+	newActorTree, err := builtin.LoadTree(actorStore, newStateRoot.Actors)
+	if err != nil {
+		return err
+	}
+	messages, err := v12.CheckStateInvariants(newActorTree, epoch, actorCodeCids)
+	if err != nil {
+		return xerrors.Errorf("checking state invariants: %w", err)
+	}
+
+	for _, message := range messages.Messages() {
+		fmt.Println("got the following error: ", message)
+	}
+
+	fmt.Println("completed invariant checks, took ", time.Since(startTime))
+
+	return nil
+}
 func checkNv19Invariants(ctx context.Context, oldStateRootCid cid.Cid, newStateRootCid cid.Cid, bs blockstore.Blockstore, epoch abi.ChainEpoch) error {
 
 	actorStore := store.ActorStore(ctx, bs)
diff --git a/cmd/lotus-shed/shedgen/cbor_gen.go b/cmd/lotus-shed/shedgen/cbor_gen.go
index a04d52c8e..f2a79fe7d 100644
--- a/cmd/lotus-shed/shedgen/cbor_gen.go
+++ b/cmd/lotus-shed/shedgen/cbor_gen.go
@@ -38,7 +38,7 @@ func (t *CarbNode) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Sub"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Sub")); err != nil {
+	if _, err := cw.WriteString(string("Sub")); err != nil {
 		return err
 	}
 
@@ -50,9 +50,11 @@ func (t *CarbNode) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.Sub {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.Sub: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 	return nil
 }
@@ -116,12 +118,25 @@ func (t *CarbNode) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for i := 0; i < int(extra); i++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				c, err := cbg.ReadCid(cr)
-				if err != nil {
-					return xerrors.Errorf("reading cid field t.Sub failed: %w", err)
+					{
+
+						c, err := cbg.ReadCid(cr)
+						if err != nil {
+							return xerrors.Errorf("failed to read cid field t.Sub[i]: %w", err)
+						}
+
+						t.Sub[i] = c
+
+					}
 				}
-				t.Sub[i] = c
 			}
 
 		default:
diff --git a/cmd/lotus-sim/simulation/stages/precommit_stage.go b/cmd/lotus-sim/simulation/stages/precommit_stage.go
index 8f82d8988..1a89413d7 100644
--- a/cmd/lotus-sim/simulation/stages/precommit_stage.go
+++ b/cmd/lotus-sim/simulation/stages/precommit_stage.go
@@ -165,7 +165,7 @@ func (stage *PreCommitStage) packMiner(
 
 	// Generate pre-commits.
 	sealType, err := miner.PreferredSealProofTypeFromWindowPoStType(
-		nv, minerInfo.WindowPoStProofType,
+		nv, minerInfo.WindowPoStProofType, false,
 	)
 	if err != nil {
 		return 0, false, err
@@ -176,7 +176,12 @@ func (stage *PreCommitStage) packMiner(
 		return 0, false, err
 	}
 
-	expiration := epoch + policy.GetMaxSectorExpirationExtension()
+	maxExtension, err := policy.GetMaxSectorExpirationExtension(nv)
+	if err != nil {
+		return 0, false, xerrors.Errorf("failed to get max extension: %w", err)
+	}
+
+	expiration := epoch + maxExtension
 	infos := make([]minertypes.PreCommitSectorParams, len(sectorNos))
 	for i, sno := range sectorNos {
 		infos[i] = minertypes.PreCommitSectorParams{
diff --git a/conformance/chaos/cbor_gen.go b/conformance/chaos/cbor_gen.go
index 5da16e16f..d74ae0946 100644
--- a/conformance/chaos/cbor_gen.go
+++ b/conformance/chaos/cbor_gen.go
@@ -44,7 +44,7 @@ func (t *State) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Value))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Value)); err != nil {
+	if _, err := cw.WriteString(string(t.Value)); err != nil {
 		return err
 	}
 
@@ -117,13 +117,32 @@ func (t *State) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v UnmarshallableCBOR
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+					t.Unmarshallable[i] = new(UnmarshallableCBOR)
+					if err := t.Unmarshallable[i].UnmarshalCBOR(cr); err != nil {
+						return xerrors.Errorf("unmarshaling t.Unmarshallable[i] pointer: %w", err)
+					}
+				}
+
+			}
 		}
-
-		t.Unmarshallable[i] = &v
 	}
 
 	return nil
@@ -177,9 +196,11 @@ func (t *CallerValidationArgs) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.Types {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.Types: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 	return nil
 }
@@ -252,13 +273,22 @@ func (t *CallerValidationArgs) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		var v address.Address
-		if err := v.UnmarshalCBOR(cr); err != nil {
-			return err
+			{
+
+				if err := t.Addrs[i].UnmarshalCBOR(cr); err != nil {
+					return xerrors.Errorf("unmarshaling t.Addrs[i]: %w", err)
+				}
+
+			}
 		}
-
-		t.Addrs[i] = v
 	}
 
 	// t.Types ([]cid.Cid) (slice)
@@ -281,12 +311,25 @@ func (t *CallerValidationArgs) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		c, err := cbg.ReadCid(cr)
-		if err != nil {
-			return xerrors.Errorf("reading cid field t.Types failed: %w", err)
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.Types[i]: %w", err)
+				}
+
+				t.Types[i] = c
+
+			}
 		}
-		t.Types[i] = c
 	}
 
 	return nil
@@ -746,7 +789,7 @@ func (t *MutateStateArgs) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Value))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Value)); err != nil {
+	if _, err := cw.WriteString(string(t.Value)); err != nil {
 		return err
 	}
 
@@ -857,7 +900,7 @@ func (t *AbortWithArgs) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Message))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Message)); err != nil {
+	if _, err := cw.WriteString(string(t.Message)); err != nil {
 		return err
 	}
 
diff --git a/documentation/en/api-v0-methods-miner.md b/documentation/en/api-v0-methods-miner.md
index 04c037bc5..57070caed 100644
--- a/documentation/en/api-v0-methods-miner.md
+++ b/documentation/en/api-v0-methods-miner.md
@@ -4213,6 +4213,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
+              "MaxConcurrent": 0
+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 8388608,
+              "MaxConcurrent": 0
+            },
+            "12": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1610612736,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 10737418240,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 32212254720,
+              "MaxMemory": 103079215104,
+              "GPUUtilization": 1,
+              "MaxParallelism": -1,
+              "MaxParallelismGPU": 6,
+              "BaseMinMemory": 34359738368,
+              "MaxConcurrent": 0
+            },
+            "14": {
+              "MinMemory": 64424509440,
+              "MaxMemory": 128849018880,
+              "GPUUtilization": 1,
+              "MaxParallelism": -1,
+              "MaxParallelismGPU": 6,
+              "BaseMinMemory": 68719476736,
+              "MaxConcurrent": 0
+            },
             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1610612736,
@@ -4305,6 +4350,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
+              "MaxConcurrent": 0
+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 8388608,
+              "MaxConcurrent": 0
+            },
+            "12": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 10737418240,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
+              "GPUUtilization": 1,
+              "MaxParallelism": -1,
+              "MaxParallelismGPU": 6,
+              "BaseMinMemory": 34359738368,
+              "MaxConcurrent": 0
+            },
+            "14": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
+              "GPUUtilization": 1,
+              "MaxParallelism": -1,
+              "MaxParallelismGPU": 6,
+              "BaseMinMemory": 68719476736,
+              "MaxConcurrent": 0
+            },
             "2": {
               "MinMemory": 2048,
               "MaxMemory": 2048,
@@ -4397,6 +4487,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
+              "MaxConcurrent": 0
+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 8388608,
+              "MaxConcurrent": 0
+            },
+            "12": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 4294967296,
+              "MaxMemory": 4294967296,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "14": {
+              "MinMemory": 8589934592,
+              "MaxMemory": 8589934592,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1073741824,
@@ -4489,6 +4624,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
+              "MaxConcurrent": 0
+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 8388608,
+              "MaxConcurrent": 0
+            },
+            "12": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "14": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1073741824,
@@ -4581,6 +4761,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
+              "MaxConcurrent": 0
+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 8388608,
+              "MaxConcurrent": 0
+            },
+            "12": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1610612736,
+              "GPUUtilization": 1,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 10737418240,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 32212254720,
+              "MaxMemory": 161061273600,
+              "GPUUtilization": 1,
+              "MaxParallelism": -1,
+              "MaxParallelismGPU": 6,
+              "BaseMinMemory": 34359738368,
+              "MaxConcurrent": 0
+            },
+            "14": {
+              "MinMemory": 64424509440,
+              "MaxMemory": 204010946560,
+              "GPUUtilization": 1,
+              "MaxParallelism": -1,
+              "MaxParallelismGPU": 6,
+              "BaseMinMemory": 68719476736,
+              "MaxConcurrent": 0
+            },
             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1610612736,
@@ -4673,6 +4898,51 @@ Response:
               "BaseMinMemory": 1073741824,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 4294967296,
+              "MaxMemory": 4294967296,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "11": {
+              "MinMemory": 4294967296,
+              "MaxMemory": 4294967296,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "12": {
+              "MinMemory": 4294967296,
+              "MaxMemory": 4294967296,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 4294967296,
+              "MaxMemory": 4294967296,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "14": {
+              "MinMemory": 4294967296,
+              "MaxMemory": 4294967296,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
             "2": {
               "MinMemory": 4294967296,
               "MaxMemory": 4294967296,
@@ -4765,6 +5035,51 @@ Response:
               "BaseMinMemory": 0,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 1048576,
+              "MaxMemory": 1048576,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 0,
+              "MaxConcurrent": 0
+            },
+            "11": {
+              "MinMemory": 1048576,
+              "MaxMemory": 1048576,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 0,
+              "MaxConcurrent": 0
+            },
+            "12": {
+              "MinMemory": 1048576,
+              "MaxMemory": 1048576,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 0,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 1048576,
+              "MaxMemory": 1048576,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 0,
+              "MaxConcurrent": 0
+            },
+            "14": {
+              "MinMemory": 1048576,
+              "MaxMemory": 1048576,
+              "GPUUtilization": 0,
+              "MaxParallelism": 0,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 0,
+              "MaxConcurrent": 0
+            },
             "2": {
               "MinMemory": 1048576,
               "MaxMemory": 1048576,
@@ -4857,6 +5172,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
+              "MaxConcurrent": 0
+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 8388608,
+              "MaxConcurrent": 0
+            },
+            "12": {
+              "MinMemory": 805306368,
+              "MaxMemory": 1073741824,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1048576,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 60129542144,
+              "MaxMemory": 68719476736,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 10485760,
+              "MaxConcurrent": 0
+            },
+            "14": {
+              "MinMemory": 120259084288,
+              "MaxMemory": 137438953472,
+              "GPUUtilization": 0,
+              "MaxParallelism": 1,
+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 10485760,
+              "MaxConcurrent": 0
+            },
             "2": {
               "MinMemory": 805306368,
               "MaxMemory": 1073741824,
@@ -4949,6 +5309,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 0,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
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+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
+              "GPUUtilization": 0,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 8388608,
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+            },
+            "12": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1610612736,
+              "GPUUtilization": 0,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
+            },
+            "13": {
+              "MinMemory": 16106127360,
+              "MaxMemory": 16106127360,
+              "GPUUtilization": 1,
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+              "MaxParallelismGPU": 6,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
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+            "14": {
+              "MinMemory": 32212254720,
+              "MaxMemory": 32212254720,
+              "GPUUtilization": 1,
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+              "MaxParallelismGPU": 6,
+              "BaseMinMemory": 1073741824,
+              "MaxConcurrent": 0
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             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1610612736,
@@ -5041,6 +5446,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 0,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
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+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
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+            "12": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
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+            "13": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
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+            "14": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
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             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1073741824,
@@ -5133,6 +5583,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 1,
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+              "BaseMinMemory": 2048,
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+            },
+            "11": {
+              "MinMemory": 8388608,
+              "MaxMemory": 8388608,
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+            "12": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1610612736,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 10737418240,
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+            },
+            "13": {
+              "MinMemory": 32212254720,
+              "MaxMemory": 161061273600,
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+              "MaxParallelismGPU": 6,
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+            "14": {
+              "MinMemory": 64424509440,
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+            },
             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1610612736,
@@ -5225,6 +5720,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
+              "GPUUtilization": 1,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 2048,
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+            },
+            "11": {
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+            "12": {
+              "MinMemory": 1073741824,
+              "MaxMemory": 1073741824,
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+              "MaxParallelismGPU": 0,
+              "BaseMinMemory": 1073741824,
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+            "13": {
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+            "14": {
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             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1073741824,
@@ -5317,6 +5857,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
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+            "11": {
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+            "12": {
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+              "MaxMemory": 1073741824,
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+            "13": {
+              "MinMemory": 4294967296,
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+            "14": {
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             "2": {
               "MinMemory": 1073741824,
               "MaxMemory": 1073741824,
@@ -5409,6 +5994,51 @@ Response:
               "BaseMinMemory": 8388608,
               "MaxConcurrent": 0
             },
+            "10": {
+              "MinMemory": 2048,
+              "MaxMemory": 2048,
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+            },
+            "11": {
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+            "12": {
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+            "13": {
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+            "14": {
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diff --git a/documentation/en/api-v0-methods-worker.md b/documentation/en/api-v0-methods-worker.md
index d7d0f092e..1c2100c9c 100644
--- a/documentation/en/api-v0-methods-worker.md
+++ b/documentation/en/api-v0-methods-worker.md
@@ -138,6 +138,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
+          "MinMemory": 2048,
+          "MaxMemory": 2048,
+          "GPUUtilization": 1,
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+        "11": {
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+        "12": {
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+        "13": {
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         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1610612736,
@@ -230,6 +275,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
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+        },
+        "11": {
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+        "13": {
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         "2": {
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           "MaxMemory": 2048,
@@ -322,6 +412,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
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         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1073741824,
@@ -414,6 +549,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
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+        "11": {
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+        "13": {
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         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1073741824,
@@ -506,6 +686,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
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         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1610612736,
@@ -598,6 +823,51 @@ Response:
           "BaseMinMemory": 1073741824,
           "MaxConcurrent": 0
         },
+        "10": {
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         "2": {
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           "MaxMemory": 4294967296,
@@ -690,6 +960,51 @@ Response:
           "BaseMinMemory": 0,
           "MaxConcurrent": 0
         },
+        "10": {
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         "2": {
           "MinMemory": 1048576,
           "MaxMemory": 1048576,
@@ -782,6 +1097,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
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         "2": {
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@@ -874,6 +1234,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
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+        },
+        "12": {
+          "MinMemory": 1073741824,
+          "MaxMemory": 1610612736,
+          "GPUUtilization": 0,
+          "MaxParallelism": -1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
+        "13": {
+          "MinMemory": 16106127360,
+          "MaxMemory": 16106127360,
+          "GPUUtilization": 1,
+          "MaxParallelism": -1,
+          "MaxParallelismGPU": 6,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
+        "14": {
+          "MinMemory": 32212254720,
+          "MaxMemory": 32212254720,
+          "GPUUtilization": 1,
+          "MaxParallelism": -1,
+          "MaxParallelismGPU": 6,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1610612736,
@@ -966,6 +1371,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
+          "MinMemory": 2048,
+          "MaxMemory": 2048,
+          "GPUUtilization": 0,
+          "MaxParallelism": 0,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 2048,
+          "MaxConcurrent": 0
+        },
+        "11": {
+          "MinMemory": 8388608,
+          "MaxMemory": 8388608,
+          "GPUUtilization": 0,
+          "MaxParallelism": 0,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 8388608,
+          "MaxConcurrent": 0
+        },
+        "12": {
+          "MinMemory": 1073741824,
+          "MaxMemory": 1073741824,
+          "GPUUtilization": 0,
+          "MaxParallelism": 0,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
+        "13": {
+          "MinMemory": 1073741824,
+          "MaxMemory": 1073741824,
+          "GPUUtilization": 0,
+          "MaxParallelism": 0,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
+        "14": {
+          "MinMemory": 1073741824,
+          "MaxMemory": 1073741824,
+          "GPUUtilization": 0,
+          "MaxParallelism": 0,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1073741824,
@@ -1058,6 +1508,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
+          "MinMemory": 2048,
+          "MaxMemory": 2048,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 2048,
+          "MaxConcurrent": 0
+        },
+        "11": {
+          "MinMemory": 8388608,
+          "MaxMemory": 8388608,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 8388608,
+          "MaxConcurrent": 0
+        },
+        "12": {
+          "MinMemory": 1073741824,
+          "MaxMemory": 1610612736,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 10737418240,
+          "MaxConcurrent": 0
+        },
+        "13": {
+          "MinMemory": 32212254720,
+          "MaxMemory": 161061273600,
+          "GPUUtilization": 1,
+          "MaxParallelism": -1,
+          "MaxParallelismGPU": 6,
+          "BaseMinMemory": 34359738368,
+          "MaxConcurrent": 0
+        },
+        "14": {
+          "MinMemory": 64424509440,
+          "MaxMemory": 204010946560,
+          "GPUUtilization": 1,
+          "MaxParallelism": -1,
+          "MaxParallelismGPU": 6,
+          "BaseMinMemory": 68719476736,
+          "MaxConcurrent": 0
+        },
         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1610612736,
@@ -1150,6 +1645,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
+          "MinMemory": 2048,
+          "MaxMemory": 2048,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 2048,
+          "MaxConcurrent": 0
+        },
+        "11": {
+          "MinMemory": 8388608,
+          "MaxMemory": 8388608,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 8388608,
+          "MaxConcurrent": 0
+        },
+        "12": {
+          "MinMemory": 1073741824,
+          "MaxMemory": 1073741824,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
+        "13": {
+          "MinMemory": 4294967296,
+          "MaxMemory": 4294967296,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 6,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
+        "14": {
+          "MinMemory": 8589934592,
+          "MaxMemory": 8589934592,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 6,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1073741824,
@@ -1242,6 +1782,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
+          "MinMemory": 2048,
+          "MaxMemory": 2048,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 2048,
+          "MaxConcurrent": 0
+        },
+        "11": {
+          "MinMemory": 8388608,
+          "MaxMemory": 8388608,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 8388608,
+          "MaxConcurrent": 0
+        },
+        "12": {
+          "MinMemory": 1073741824,
+          "MaxMemory": 1073741824,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
+        "13": {
+          "MinMemory": 4294967296,
+          "MaxMemory": 4294967296,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 6,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
+        "14": {
+          "MinMemory": 8589934592,
+          "MaxMemory": 8589934592,
+          "GPUUtilization": 1,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 6,
+          "BaseMinMemory": 1073741824,
+          "MaxConcurrent": 0
+        },
         "2": {
           "MinMemory": 1073741824,
           "MaxMemory": 1073741824,
@@ -1334,6 +1919,51 @@ Response:
           "BaseMinMemory": 8388608,
           "MaxConcurrent": 0
         },
+        "10": {
+          "MinMemory": 2048,
+          "MaxMemory": 2048,
+          "GPUUtilization": 0,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 2048,
+          "MaxConcurrent": 0
+        },
+        "11": {
+          "MinMemory": 8388608,
+          "MaxMemory": 8388608,
+          "GPUUtilization": 0,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 8388608,
+          "MaxConcurrent": 0
+        },
+        "12": {
+          "MinMemory": 805306368,
+          "MaxMemory": 1073741824,
+          "GPUUtilization": 0,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 1048576,
+          "MaxConcurrent": 0
+        },
+        "13": {
+          "MinMemory": 60129542144,
+          "MaxMemory": 68719476736,
+          "GPUUtilization": 0,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 10485760,
+          "MaxConcurrent": 0
+        },
+        "14": {
+          "MinMemory": 120259084288,
+          "MaxMemory": 137438953472,
+          "GPUUtilization": 0,
+          "MaxParallelism": 1,
+          "MaxParallelismGPU": 0,
+          "BaseMinMemory": 10485760,
+          "MaxConcurrent": 0
+        },
         "2": {
           "MinMemory": 805306368,
           "MaxMemory": 1073741824,
diff --git a/documentation/en/cli-lotus-miner.md b/documentation/en/cli-lotus-miner.md
index 8406b07cc..6e5942eb2 100644
--- a/documentation/en/cli-lotus-miner.md
+++ b/documentation/en/cli-lotus-miner.md
@@ -223,6 +223,7 @@ COMMANDS:
    propose-change-worker       Propose a worker address change
    confirm-change-worker       Confirm a worker address change
    compact-allocated           compact allocated sectors bitfield
+   move-partitions             move deadline of specified partitions from one to another
    propose-change-beneficiary  Propose a beneficiary address change
    confirm-change-beneficiary  Confirm a beneficiary address change
    help, h                     Shows a list of commands or help for one command
@@ -366,12 +367,28 @@ USAGE:
    lotus-miner actor compact-allocated [command options] [arguments...]
 
 OPTIONS:
-   --mask-last-offset value  Mask sector IDs from 0 to 'higest_allocated - offset' (default: 0)
+   --mask-last-offset value  Mask sector IDs from 0 to 'highest_allocated - offset' (default: 0)
    --mask-upto-n value       Mask sector IDs from 0 to 'n' (default: 0)
    --really-do-it            Actually send transaction performing the action (default: false)
    --help, -h                show help
 ```
 
+### lotus-miner actor move-partitions
+```
+NAME:
+   lotus-miner actor move-partitions - move deadline of specified partitions from one to another
+
+USAGE:
+   lotus-miner actor move-partitions [command options] [arguments...]
+
+OPTIONS:
+   --partition-indices value [ --partition-indices value ]  Indices of partitions to update, separated by comma
+   --orig-deadline value                                    Deadline to move partition from (default: 0)
+   --dest-deadline value                                    Deadline to move partition to (default: 0)
+   --really-do-it                                           Actually send transaction performing the action (default: false)
+   --help, -h                                               show help
+```
+
 ### lotus-miner actor propose-change-beneficiary
 ```
 NAME:
diff --git a/documentation/en/default-lotus-miner-config.toml b/documentation/en/default-lotus-miner-config.toml
index 68bb76f1a..f0e3fa3f0 100644
--- a/documentation/en/default-lotus-miner-config.toml
+++ b/documentation/en/default-lotus-miner-config.toml
@@ -427,13 +427,10 @@
   # env var: LOTUS_PROVING_DISABLEWDPOSTPRECHECKS
   #DisableWDPoStPreChecks = false
 
-  # Maximum number of partitions to prove in a single SubmitWindowPoSt messace. 0 = network limit (10 in nv16)
+  # Maximum number of partitions to prove in a single SubmitWindowPoSt messace. 0 = network limit (3 in nv21)
   # 
   # A single partition may contain up to 2349 32GiB sectors, or 2300 64GiB sectors.
-  # 
-  # The maximum number of sectors which can be proven in a single PoSt message is 25000 in network version 16, which
-  # means that a single message can prove at most 10 partitions
-  # 
+  # //
   # Note that setting this value lower may result in less efficient gas use - more messages will be sent,
   # to prove each deadline, resulting in more total gas use (but each message will have lower gas limit)
   # 
@@ -523,7 +520,7 @@
 
   # CommittedCapacitySectorLifetime is the duration a Committed Capacity (CC) sector will
   # live before it must be extended or converted into sector containing deals before it is
-  # terminated. Value must be between 180-540 days inclusive
+  # terminated. Value must be between 180-1278 days (1278 in nv21, 540 before nv21).
   #
   # type: Duration
   # env var: LOTUS_SEALING_COMMITTEDCAPACITYSECTORLIFETIME
@@ -666,6 +663,12 @@
   # env var: LOTUS_SEALING_TERMINATEBATCHWAIT
   #TerminateBatchWait = "5m0s"
 
+  # UseSyntheticPoRep, when set to true, will reduce the amount of cache data held on disk after the completion of PreCommit 2 to 11GiB.
+  #
+  # type: bool
+  # env var: LOTUS_SEALING_USESYNTHETICPOREP
+  #UseSyntheticPoRep = false
+
 
 [Storage]
   # type: int
diff --git a/extern/filecoin-ffi b/extern/filecoin-ffi
index bf5edd551..441fa8e61 160000
--- a/extern/filecoin-ffi
+++ b/extern/filecoin-ffi
@@ -1 +1 @@
-Subproject commit bf5edd551d23901fa565aac4ce94433afe0c278e
+Subproject commit 441fa8e61189dc32c2960c1f8d8ba56269f20366
diff --git a/go.mod b/go.mod
index bf8f912ba..ab9e5d4fa 100644
--- a/go.mod
+++ b/go.mod
@@ -45,7 +45,7 @@ require (
 	github.com/filecoin-project/go-jsonrpc v0.3.1
 	github.com/filecoin-project/go-padreader v0.0.1
 	github.com/filecoin-project/go-paramfetch v0.0.4
-	github.com/filecoin-project/go-state-types v0.12.1
+	github.com/filecoin-project/go-state-types v0.12.4
 	github.com/filecoin-project/go-statemachine v1.0.3
 	github.com/filecoin-project/go-statestore v0.2.0
 	github.com/filecoin-project/go-storedcounter v0.1.0
@@ -138,7 +138,7 @@ require (
 	github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7
 	github.com/urfave/cli/v2 v2.25.5
 	github.com/whyrusleeping/bencher v0.0.0-20190829221104-bb6607aa8bba
-	github.com/whyrusleeping/cbor-gen v0.0.0-20230126041949-52956bd4c9aa
+	github.com/whyrusleeping/cbor-gen v0.0.0-20230923211252-36a87e1ba72f
 	github.com/whyrusleeping/ledger-filecoin-go v0.9.1-0.20201010031517-c3dcc1bddce4
 	github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7
 	github.com/xeipuuv/gojsonschema v1.2.0
diff --git a/go.sum b/go.sum
index b5020432d..4a3f99cbc 100644
--- a/go.sum
+++ b/go.sum
@@ -337,9 +337,9 @@ github.com/filecoin-project/go-state-types v0.0.0-20201102161440-c8033295a1fc/go
 github.com/filecoin-project/go-state-types v0.1.0/go.mod h1:ezYnPf0bNkTsDibL/psSz5dy4B5awOJ/E7P2Saeep8g=
 github.com/filecoin-project/go-state-types v0.1.6/go.mod h1:UwGVoMsULoCK+bWjEdd/xLCvLAQFBC7EDT477SKml+Q=
 github.com/filecoin-project/go-state-types v0.1.10/go.mod h1:UwGVoMsULoCK+bWjEdd/xLCvLAQFBC7EDT477SKml+Q=
-github.com/filecoin-project/go-state-types v0.11.1/go.mod h1:SyNPwTsU7I22gL2r0OAPcImvLoTVfgRwdK/Y5rR1zz8=
-github.com/filecoin-project/go-state-types v0.12.1 h1:/1ip/jXIP4QzWd3hlaQ7RGp1DHKKYG3+NOhd/r08UJY=
-github.com/filecoin-project/go-state-types v0.12.1/go.mod h1:KOBGyvCalT8uHBS7KSKOVbjsilD90bBZHgLAqrzz6gU=
+github.com/filecoin-project/go-state-types v0.11.2-0.20230712101859-8f37624fa540/go.mod h1:SyNPwTsU7I22gL2r0OAPcImvLoTVfgRwdK/Y5rR1zz8=
+github.com/filecoin-project/go-state-types v0.12.4 h1:F1yQRCgFGvg+UmBGWxskHcvNswjh061Ok/kOk0OWhQY=
+github.com/filecoin-project/go-state-types v0.12.4/go.mod h1:iJTqGdWDvzXhuVf64Lw0hzt4TIoitMo0VgHdxdjNDZI=
 github.com/filecoin-project/go-statemachine v0.0.0-20200925024713-05bd7c71fbfe/go.mod h1:FGwQgZAt2Gh5mjlwJUlVB62JeYdo+if0xWxSEfBD9ig=
 github.com/filecoin-project/go-statemachine v1.0.3 h1:N07o6alys+V1tNoSTi4WuuoeNC4erS/6jE74+NsgQuk=
 github.com/filecoin-project/go-statemachine v1.0.3/go.mod h1:jZdXXiHa61n4NmgWFG4w8tnqgvZVHYbJ3yW7+y8bF54=
@@ -1637,8 +1637,8 @@ github.com/whyrusleeping/cbor-gen v0.0.0-20200826160007-0b9f6c5fb163/go.mod h1:f
 github.com/whyrusleeping/cbor-gen v0.0.0-20210118024343-169e9d70c0c2/go.mod h1:fgkXqYy7bV2cFeIEOkVTZS/WjXARfBqSH6Q2qHL33hQ=
 github.com/whyrusleeping/cbor-gen v0.0.0-20210303213153-67a261a1d291/go.mod h1:fgkXqYy7bV2cFeIEOkVTZS/WjXARfBqSH6Q2qHL33hQ=
 github.com/whyrusleeping/cbor-gen v0.0.0-20220323183124-98fa8256a799/go.mod h1:fgkXqYy7bV2cFeIEOkVTZS/WjXARfBqSH6Q2qHL33hQ=
-github.com/whyrusleeping/cbor-gen v0.0.0-20230126041949-52956bd4c9aa h1:EyA027ZAkuaCLoxVX4r1TZMPy1d31fM6hbfQ4OU4I5o=
-github.com/whyrusleeping/cbor-gen v0.0.0-20230126041949-52956bd4c9aa/go.mod h1:fgkXqYy7bV2cFeIEOkVTZS/WjXARfBqSH6Q2qHL33hQ=
+github.com/whyrusleeping/cbor-gen v0.0.0-20230923211252-36a87e1ba72f h1:SBuSxXJL0/ZJMtTxbXZgHZkThl9dNrzyaNhlyaqscRo=
+github.com/whyrusleeping/cbor-gen v0.0.0-20230923211252-36a87e1ba72f/go.mod h1:fgkXqYy7bV2cFeIEOkVTZS/WjXARfBqSH6Q2qHL33hQ=
 github.com/whyrusleeping/chunker v0.0.0-20181014151217-fe64bd25879f h1:jQa4QT2UP9WYv2nzyawpKMOCl+Z/jW7djv2/J50lj9E=
 github.com/whyrusleeping/chunker v0.0.0-20181014151217-fe64bd25879f/go.mod h1:p9UJB6dDgdPgMJZs7UjUOdulKyRr9fqkS+6JKAInPy8=
 github.com/whyrusleeping/go-keyspace v0.0.0-20160322163242-5b898ac5add1 h1:EKhdznlJHPMoKr0XTrX+IlJs1LH3lyx2nfr1dOlZ79k=
@@ -2265,6 +2265,7 @@ gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
diff --git a/itests/fevm_test.go b/itests/fevm_test.go
index 1512c3277..cb69c036c 100644
--- a/itests/fevm_test.go
+++ b/itests/fevm_test.go
@@ -618,9 +618,9 @@ func TestFEVMRecursiveActorCall(t *testing.T) {
 	t.Run("n=251,r=32", testN(251, 32, exitcode.Ok))
 
 	t.Run("n=0,r=252", testN(0, 252, exitcode.Ok))
-	t.Run("n=251,r=166", testN(251, 166, exitcode.Ok))
+	t.Run("n=251,r=164", testN(251, 164, exitcode.Ok))
 
-	t.Run("n=0,r=253-fails", testN(0, 254, exitcode.ExitCode(33))) // 33 means transaction reverted
+	t.Run("n=0,r=255-fails", testN(0, 255, exitcode.ExitCode(33))) // 33 means transaction reverted
 	t.Run("n=251,r=167-fails", testN(251, 167, exitcode.ExitCode(33)))
 }
 
diff --git a/itests/kit/ensemble.go b/itests/kit/ensemble.go
index 18b8fd734..45f21786d 100644
--- a/itests/kit/ensemble.go
+++ b/itests/kit/ensemble.go
@@ -260,7 +260,7 @@ func (n *Ensemble) MinerEnroll(minerNode *TestMiner, full *TestFullNode, opts ..
 		)
 
 		// Will use 2KiB sectors by default (default value of sectorSize).
-		proofType, err := miner.SealProofTypeFromSectorSize(options.sectorSize, n.genesis.version)
+		proofType, err := miner.SealProofTypeFromSectorSize(options.sectorSize, n.genesis.version, false)
 		require.NoError(n.t, err)
 
 		// Create the preseal commitment.
diff --git a/itests/migration_test.go b/itests/migration_test.go
index 4082792ce..68991a579 100644
--- a/itests/migration_test.go
+++ b/itests/migration_test.go
@@ -34,6 +34,7 @@ import (
 	"github.com/filecoin-project/lotus/chain/actors/builtin/datacap"
 	"github.com/filecoin-project/lotus/chain/actors/builtin/market"
 	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/system"
 	"github.com/filecoin-project/lotus/chain/actors/builtin/verifreg"
 	"github.com/filecoin-project/lotus/chain/consensus/filcns"
 	"github.com/filecoin-project/lotus/chain/state"
@@ -301,7 +302,7 @@ func TestMigrationNV17(t *testing.T) {
 	minerInfo, err := testClient.StateMinerInfo(ctx, testMiner.ActorAddr, types.EmptyTSK)
 	require.NoError(t, err)
 
-	spt, err := miner.SealProofTypeFromSectorSize(minerInfo.SectorSize, network.Version17)
+	spt, err := miner.SealProofTypeFromSectorSize(minerInfo.SectorSize, network.Version17, false)
 	require.NoError(t, err)
 
 	preCommitParams := miner9.PreCommitSectorParams{
@@ -762,3 +763,68 @@ waitForProof20:
 	require.Equal(t, v1proof, minerInfo.WindowPoStProofType)
 
 }
+
+func TestMigrationNV21(t *testing.T) {
+	kit.QuietMiningLogs()
+
+	nv21epoch := abi.ChainEpoch(100)
+	testClient, _, ens := kit.EnsembleMinimal(t, kit.MockProofs(),
+		kit.UpgradeSchedule(stmgr.Upgrade{
+			Network: network.Version20,
+			Height:  -1,
+		}, stmgr.Upgrade{
+			Network:   network.Version21,
+			Height:    nv21epoch,
+			Migration: filcns.UpgradeActorsV12,
+		},
+		))
+
+	ens.InterconnectAll().BeginMining(10 * time.Millisecond)
+
+	clientApi := testClient.FullNode.(*impl.FullNodeAPI)
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	testClient.WaitTillChain(ctx, kit.HeightAtLeast(nv21epoch+5))
+
+	// Now that we have upgraded, we need to verify:
+	// - Sector info changes executed successfully
+	// - Direct data onboarding correct
+
+	bs := blockstore.NewAPIBlockstore(testClient)
+	ctxStore := gstStore.WrapBlockStore(ctx, bs)
+
+	currTs, err := clientApi.ChainHead(ctx)
+	require.NoError(t, err)
+
+	newStateTree, err := state.LoadStateTree(ctxStore, currTs.Blocks()[0].ParentStateRoot)
+	require.NoError(t, err)
+
+	require.Equal(t, types.StateTreeVersion5, newStateTree.Version())
+
+	// check the system actor
+	systemAct, err := newStateTree.GetActor(builtin.SystemActorAddr)
+	require.NoError(t, err)
+
+	systemCode, ok := actors.GetActorCodeID(actorstypes.Version12, manifest.SystemKey)
+	require.True(t, ok)
+
+	require.Equal(t, systemCode, systemAct.Code)
+
+	systemSt, err := system.Load(ctxStore, systemAct)
+	require.NoError(t, err)
+
+	manifest12Cid, ok := actors.GetManifest(actorstypes.Version12)
+	require.True(t, ok)
+
+	manifest12, err := actors.LoadManifest(ctx, manifest12Cid, ctxStore)
+	require.NoError(t, err)
+	require.Equal(t, manifest12.Data, systemSt.GetBuiltinActors())
+
+	// start post migration checks
+
+	//todo @aayush sector info changes
+
+	//todo @zen Direct data onboarding tests
+
+}
diff --git a/itests/sector_import_full_test.go b/itests/sector_import_full_test.go
index e4ec5e141..c9bd96afd 100644
--- a/itests/sector_import_full_test.go
+++ b/itests/sector_import_full_test.go
@@ -88,7 +88,7 @@ func TestSectorImport(t *testing.T) {
 			require.NoError(t, err)
 			ver, err := client.StateNetworkVersion(ctx, types.EmptyTSK)
 			require.NoError(t, err)
-			spt, err := lminer.PreferredSealProofTypeFromWindowPoStType(ver, mi.WindowPoStProofType)
+			spt, err := lminer.PreferredSealProofTypeFromWindowPoStType(ver, mi.WindowPoStProofType, false)
 			require.NoError(t, err)
 
 			ssize, err := spt.SectorSize()
diff --git a/itests/sector_import_simple_test.go b/itests/sector_import_simple_test.go
index f34438694..fb1a77a14 100644
--- a/itests/sector_import_simple_test.go
+++ b/itests/sector_import_simple_test.go
@@ -63,7 +63,7 @@ func TestSectorImportAfterPC2(t *testing.T) {
 	require.NoError(t, err)
 	ver, err := client.StateNetworkVersion(ctx, types.EmptyTSK)
 	require.NoError(t, err)
-	spt, err := lminer.PreferredSealProofTypeFromWindowPoStType(ver, mi.WindowPoStProofType)
+	spt, err := lminer.PreferredSealProofTypeFromWindowPoStType(ver, mi.WindowPoStProofType, false)
 	require.NoError(t, err)
 
 	ssize, err := spt.SectorSize()
diff --git a/itests/sector_pledge_test.go b/itests/sector_pledge_test.go
index a2e74ef72..1e045c79d 100644
--- a/itests/sector_pledge_test.go
+++ b/itests/sector_pledge_test.go
@@ -18,6 +18,7 @@ import (
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/itests/kit"
+	"github.com/filecoin-project/lotus/node/config"
 	"github.com/filecoin-project/lotus/node/impl"
 	sealing "github.com/filecoin-project/lotus/storage/pipeline"
 )
@@ -195,3 +196,30 @@ func TestPledgeMaxBatching(t *testing.T) {
 
 	t.Run("Force max prove commit aggregate size", runTest)
 }
+
+func TestPledgeSynth(t *testing.T) {
+	kit.QuietMiningLogs()
+
+	blockTime := 50 * time.Millisecond
+
+	runTest := func(t *testing.T, nSectors int) {
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+
+		_, miner, ens := kit.EnsembleMinimal(t, kit.MutateSealingConfig(func(sc *config.SealingConfig) {
+			sc.UseSyntheticPoRep = true
+		})) // no mock proofs
+
+		ens.InterconnectAll().BeginMiningMustPost(blockTime)
+
+		miner.PledgeSectors(ctx, nSectors, 0, nil)
+	}
+
+	t.Run("1", func(t *testing.T) {
+		runTest(t, 1)
+	})
+
+	t.Run("3", func(t *testing.T) {
+		runTest(t, 3)
+	})
+}
diff --git a/markets/storageadapter/provider.go b/markets/storageadapter/provider.go
index a5022613b..bdfce6f55 100644
--- a/markets/storageadapter/provider.go
+++ b/markets/storageadapter/provider.go
@@ -186,7 +186,10 @@ func (n *ProviderNodeAdapter) GetProofType(ctx context.Context, maddr address.Ad
 		return 0, err
 	}
 
-	return miner.PreferredSealProofTypeFromWindowPoStType(nver, mi.WindowPoStProofType)
+	// false because this variance is not consumed.
+	const configWantSynthetic = false
+
+	return miner.PreferredSealProofTypeFromWindowPoStType(nver, mi.WindowPoStProofType, configWantSynthetic)
 }
 
 func (n *ProviderNodeAdapter) SignBytes(ctx context.Context, signer address.Address, b []byte) (*crypto.Signature, error) {
diff --git a/node/config/def.go b/node/config/def.go
index d85b44f69..47c0df98f 100644
--- a/node/config/def.go
+++ b/node/config/def.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
+	"github.com/filecoin-project/go-state-types/network"
 	miner5 "github.com/filecoin-project/specs-actors/v5/actors/builtin/miner"
 
 	"github.com/filecoin-project/lotus/chain/actors/builtin"
@@ -122,6 +123,8 @@ func DefaultFullNode() *FullNode {
 }
 
 func DefaultStorageMiner() *StorageMiner {
+	// TODO: Should we increase this to nv21, which would push it to 3.5 years?
+	maxSectorExtentsion, _ := policy.GetMaxSectorExpirationExtension(network.Version20)
 	cfg := &StorageMiner{
 		Common: defCommon(),
 
@@ -143,7 +146,7 @@ func DefaultStorageMiner() *StorageMiner {
 			// XXX snap deals wait deals slack if first
 			PreCommitBatchSlack: Duration(3 * time.Hour), // time buffer for forceful batch submission before sectors/deals in batch would start expiring, higher value will lower the chances for message fail due to expiration
 
-			CommittedCapacitySectorLifetime: Duration(builtin.EpochDurationSeconds * uint64(policy.GetMaxSectorExpirationExtension()) * uint64(time.Second)),
+			CommittedCapacitySectorLifetime: Duration(builtin.EpochDurationSeconds * uint64(maxSectorExtentsion) * uint64(time.Second)),
 
 			AggregateCommits: true,
 			MinCommitBatch:   miner5.MinAggregatedSectors, // per FIP13, we must have at least four proofs to aggregate, where 4 is the cross over point where aggregation wins out on single provecommit gas costs
@@ -158,6 +161,7 @@ func DefaultStorageMiner() *StorageMiner {
 			TerminateBatchMax:                      100,
 			TerminateBatchWait:                     Duration(5 * time.Minute),
 			MaxSectorProveCommitsSubmittedPerEpoch: 20,
+			UseSyntheticPoRep:                      false,
 		},
 
 		Proving: ProvingConfig{
diff --git a/node/config/doc_gen.go b/node/config/doc_gen.go
index 26bcdd073..5a5bd4a8c 100644
--- a/node/config/doc_gen.go
+++ b/node/config/doc_gen.go
@@ -859,13 +859,10 @@ After changing this option, confirm that the new value works in your setup by in
 			Name: "MaxPartitionsPerPoStMessage",
 			Type: "int",
 
-			Comment: `Maximum number of partitions to prove in a single SubmitWindowPoSt messace. 0 = network limit (10 in nv16)
+			Comment: `Maximum number of partitions to prove in a single SubmitWindowPoSt messace. 0 = network limit (3 in nv21)
 
 A single partition may contain up to 2349 32GiB sectors, or 2300 64GiB sectors.
-
-The maximum number of sectors which can be proven in a single PoSt message is 25000 in network version 16, which
-means that a single message can prove at most 10 partitions
-
+//
 Note that setting this value lower may result in less efficient gas use - more messages will be sent,
 to prove each deadline, resulting in more total gas use (but each message will have lower gas limit)
 
@@ -1156,7 +1153,7 @@ required to have expiration of at least the soonest-ending deal`,
 
 			Comment: `CommittedCapacitySectorLifetime is the duration a Committed Capacity (CC) sector will
 live before it must be extended or converted into sector containing deals before it is
-terminated. Value must be between 180-540 days inclusive`,
+terminated. Value must be between 180-1278 days (1278 in nv21, 540 before nv21).`,
 		},
 		{
 			Name: "WaitDealsDelay",
@@ -1301,6 +1298,12 @@ Submitting a smaller number of prove commits per epoch would reduce the possibil
 
 			Comment: ``,
 		},
+		{
+			Name: "UseSyntheticPoRep",
+			Type: "bool",
+
+			Comment: `UseSyntheticPoRep, when set to true, will reduce the amount of cache data held on disk after the completion of PreCommit 2 to 11GiB.`,
+		},
 	},
 	"Splitstore": []DocField{
 		{
diff --git a/node/config/types.go b/node/config/types.go
index bec3a0bc9..013e2db1a 100644
--- a/node/config/types.go
+++ b/node/config/types.go
@@ -290,13 +290,10 @@ type ProvingConfig struct {
 	// 'lotus-miner proving compute window-post 0'
 	DisableWDPoStPreChecks bool
 
-	// Maximum number of partitions to prove in a single SubmitWindowPoSt messace. 0 = network limit (10 in nv16)
+	// Maximum number of partitions to prove in a single SubmitWindowPoSt messace. 0 = network limit (3 in nv21)
 	//
 	// A single partition may contain up to 2349 32GiB sectors, or 2300 64GiB sectors.
-	//
-	// The maximum number of sectors which can be proven in a single PoSt message is 25000 in network version 16, which
-	// means that a single message can prove at most 10 partitions
-	//
+	//	//
 	// Note that setting this value lower may result in less efficient gas use - more messages will be sent,
 	// to prove each deadline, resulting in more total gas use (but each message will have lower gas limit)
 	//
@@ -358,7 +355,7 @@ type SealingConfig struct {
 
 	// CommittedCapacitySectorLifetime is the duration a Committed Capacity (CC) sector will
 	// live before it must be extended or converted into sector containing deals before it is
-	// terminated. Value must be between 180-540 days inclusive
+	// terminated. Value must be between 180-1278 days (1278 in nv21, 540 before nv21).
 	CommittedCapacitySectorLifetime Duration
 
 	// Period of time that a newly created sector will wait for more deals to be packed in to before it starts to seal.
@@ -429,6 +426,9 @@ type SealingConfig struct {
 	// todo TargetSealingSectors uint64
 
 	// todo TargetSectors - stop auto-pleding new sectors after this many sectors are sealed, default CC upgrade for deals sectors if above
+
+	// UseSyntheticPoRep, when set to true, will reduce the amount of cache data held on disk after the completion of PreCommit 2 to 11GiB.
+	UseSyntheticPoRep bool
 }
 
 type SealerConfig struct {
diff --git a/node/hello/cbor_gen.go b/node/hello/cbor_gen.go
index 5b0697f55..78e950f6f 100644
--- a/node/hello/cbor_gen.go
+++ b/node/hello/cbor_gen.go
@@ -43,9 +43,11 @@ func (t *HelloMessage) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 	for _, v := range t.HeaviestTipSet {
-		if err := cbg.WriteCid(w, v); err != nil {
-			return xerrors.Errorf("failed writing cid field t.HeaviestTipSet: %w", err)
+
+		if err := cbg.WriteCid(cw, v); err != nil {
+			return xerrors.Errorf("failed to write cid field v: %w", err)
 		}
+
 	}
 
 	// t.HeaviestTipSetHeight (abi.ChainEpoch) (int64)
@@ -116,12 +118,25 @@ func (t *HelloMessage) UnmarshalCBOR(r io.Reader) (err error) {
 	}
 
 	for i := 0; i < int(extra); i++ {
+		{
+			var maj byte
+			var extra uint64
+			var err error
+			_ = maj
+			_ = extra
+			_ = err
 
-		c, err := cbg.ReadCid(cr)
-		if err != nil {
-			return xerrors.Errorf("reading cid field t.HeaviestTipSet failed: %w", err)
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.HeaviestTipSet[i]: %w", err)
+				}
+
+				t.HeaviestTipSet[i] = c
+
+			}
 		}
-		t.HeaviestTipSet[i] = c
 	}
 
 	// t.HeaviestTipSetHeight (abi.ChainEpoch) (int64)
diff --git a/node/impl/client/client.go b/node/impl/client/client.go
index fff46acc7..c7bb252a1 100644
--- a/node/impl/client/client.go
+++ b/node/impl/client/client.go
@@ -197,7 +197,7 @@ func (a *API) dealStarter(ctx context.Context, params *api.StartDealParams, isSt
 		return nil, xerrors.Errorf("failed to get network version: %w", err)
 	}
 
-	st, err := miner.PreferredSealProofTypeFromWindowPoStType(networkVersion, mi.WindowPoStProofType)
+	st, err := miner.PreferredSealProofTypeFromWindowPoStType(networkVersion, mi.WindowPoStProofType, false)
 	if err != nil {
 		return nil, xerrors.Errorf("failed to get seal proof type: %w", err)
 	}
diff --git a/node/impl/full/state.go b/node/impl/full/state.go
index 514951675..0e92c8e5b 100644
--- a/node/impl/full/state.go
+++ b/node/impl/full/state.go
@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"math"
 	"strconv"
 
 	"github.com/ipfs/go-cid"
@@ -19,8 +20,7 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
 	"github.com/filecoin-project/go-state-types/big"
-	minertypes "github.com/filecoin-project/go-state-types/builtin/v9/miner"
-	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
+	market12 "github.com/filecoin-project/go-state-types/builtin/v12/market"
 	"github.com/filecoin-project/go-state-types/cbor"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
@@ -794,7 +794,7 @@ func (a *StateAPI) StateGetAllocationForPendingDeal(ctx context.Context, dealId
 	if err != nil {
 		return nil, err
 	}
-	if allocationId == verifregtypes.NoAllocationID {
+	if allocationId == verifreg.NoAllocationID {
 		return nil, nil
 	}
 
@@ -914,32 +914,31 @@ func (a *StateAPI) StateComputeDataCID(ctx context.Context, maddr address.Addres
 		return cid.Cid{}, err
 	}
 
-	var ccparams []byte
 	if nv < network.Version13 {
-		ccparams, err = actors.SerializeParams(&market2.ComputeDataCommitmentParams{
-			DealIDs:    deals,
-			SectorType: sectorType,
-		})
+		return a.stateComputeDataCIDv1(ctx, maddr, sectorType, deals, tsk)
+	} else if nv < network.Version21 {
+		return a.stateComputeDataCIDv2(ctx, maddr, sectorType, deals, tsk)
 	} else {
-		ccparams, err = actors.SerializeParams(&market5.ComputeDataCommitmentParams{
-			Inputs: []*market5.SectorDataSpec{
-				{
-					DealIDs:    deals,
-					SectorType: sectorType,
-				},
-			},
-		})
+		return a.stateComputeDataCIDv3(ctx, maddr, sectorType, deals, tsk)
 	}
+}
+
+func (a *StateAPI) stateComputeDataCIDv1(ctx context.Context, maddr address.Address, sectorType abi.RegisteredSealProof, deals []abi.DealID, tsk types.TipSetKey) (cid.Cid, error) {
+	var err error
+	ccparams, err := actors.SerializeParams(&market2.ComputeDataCommitmentParams{
+		DealIDs:    deals,
+		SectorType: sectorType,
+	})
 
 	if err != nil {
 		return cid.Undef, xerrors.Errorf("computing params for ComputeDataCommitment: %w", err)
 	}
-
 	ccmt := &types.Message{
-		To:     market.Address,
-		From:   maddr,
-		Value:  types.NewInt(0),
-		Method: market.Methods.ComputeDataCommitment,
+		To:    market.Address,
+		From:  maddr,
+		Value: types.NewInt(0),
+		// Hard coded, because the method has since been deprecated
+		Method: 8,
 		Params: ccparams,
 	}
 	r, err := a.StateCall(ctx, ccmt, tsk)
@@ -950,13 +949,42 @@ func (a *StateAPI) StateComputeDataCID(ctx context.Context, maddr address.Addres
 		return cid.Undef, xerrors.Errorf("receipt for ComputeDataCommitment had exit code %d", r.MsgRct.ExitCode)
 	}
 
-	if nv < network.Version13 {
-		var c cbg.CborCid
-		if err := c.UnmarshalCBOR(bytes.NewReader(r.MsgRct.Return)); err != nil {
-			return cid.Undef, xerrors.Errorf("failed to unmarshal CBOR to CborCid: %w", err)
-		}
+	var c cbg.CborCid
+	if err := c.UnmarshalCBOR(bytes.NewReader(r.MsgRct.Return)); err != nil {
+		return cid.Undef, xerrors.Errorf("failed to unmarshal CBOR to CborCid: %w", err)
+	}
 
-		return cid.Cid(c), nil
+	return cid.Cid(c), nil
+}
+
+func (a *StateAPI) stateComputeDataCIDv2(ctx context.Context, maddr address.Address, sectorType abi.RegisteredSealProof, deals []abi.DealID, tsk types.TipSetKey) (cid.Cid, error) {
+	var err error
+	ccparams, err := actors.SerializeParams(&market5.ComputeDataCommitmentParams{
+		Inputs: []*market5.SectorDataSpec{
+			{
+				DealIDs:    deals,
+				SectorType: sectorType,
+			},
+		},
+	})
+
+	if err != nil {
+		return cid.Undef, xerrors.Errorf("computing params for ComputeDataCommitment: %w", err)
+	}
+	ccmt := &types.Message{
+		To:    market.Address,
+		From:  maddr,
+		Value: types.NewInt(0),
+		// Hard coded, because the method has since been deprecated
+		Method: 8,
+		Params: ccparams,
+	}
+	r, err := a.StateCall(ctx, ccmt, tsk)
+	if err != nil {
+		return cid.Undef, xerrors.Errorf("calling ComputeDataCommitment: %w", err)
+	}
+	if r.MsgRct.ExitCode != 0 {
+		return cid.Undef, xerrors.Errorf("receipt for ComputeDataCommitment had exit code %d", r.MsgRct.ExitCode)
 	}
 
 	var cr market5.ComputeDataCommitmentReturn
@@ -971,6 +999,52 @@ func (a *StateAPI) StateComputeDataCID(ctx context.Context, maddr address.Addres
 	return cid.Cid(cr.CommDs[0]), nil
 }
 
+func (a *StateAPI) stateComputeDataCIDv3(ctx context.Context, maddr address.Address, sectorType abi.RegisteredSealProof, deals []abi.DealID, tsk types.TipSetKey) (cid.Cid, error) {
+	if len(deals) == 0 {
+		return cid.Undef, nil
+	}
+
+	var err error
+	ccparams, err := actors.SerializeParams(&market12.VerifyDealsForActivationParams{
+		Sectors: []market12.SectorDeals{{
+			SectorType:   sectorType,
+			SectorExpiry: math.MaxInt64,
+			DealIDs:      deals,
+		}},
+	})
+
+	if err != nil {
+		return cid.Undef, xerrors.Errorf("computing params for VerifyDealsForActivation: %w", err)
+	}
+	ccmt := &types.Message{
+		To:     market.Address,
+		From:   maddr,
+		Value:  types.NewInt(0),
+		Method: market.Methods.VerifyDealsForActivation,
+		Params: ccparams,
+	}
+	r, err := a.StateCall(ctx, ccmt, tsk)
+	if err != nil {
+		return cid.Undef, xerrors.Errorf("calling VerifyDealsForActivation: %w", err)
+	}
+	if r.MsgRct.ExitCode != 0 {
+		return cid.Undef, xerrors.Errorf("receipt for VerifyDealsForActivation had exit code %d", r.MsgRct.ExitCode)
+	}
+
+	var cr market12.VerifyDealsForActivationReturn
+	if err := cr.UnmarshalCBOR(bytes.NewReader(r.MsgRct.Return)); err != nil {
+		return cid.Undef, xerrors.Errorf("failed to unmarshal CBOR to VerifyDealsForActivationReturn: %w", err)
+	}
+	if len(cr.UnsealedCIDs) != 1 {
+		return cid.Undef, xerrors.Errorf("Sectors output must have 1 entry")
+	}
+	ucid := cr.UnsealedCIDs[0]
+	if ucid == nil {
+		return cid.Undef, xerrors.Errorf("computed data CID is nil")
+	}
+	return *ucid, nil
+}
+
 func (a *StateAPI) StateChangedActors(ctx context.Context, old cid.Cid, new cid.Cid) (map[string]types.Actor, error) {
 	store := a.Chain.ActorStore(ctx)
 
@@ -1040,7 +1114,7 @@ func (a *StateAPI) StateMinerAllocated(ctx context.Context, addr address.Address
 	return mas.GetAllocatedSectors()
 }
 
-func (a *StateAPI) StateSectorPreCommitInfo(ctx context.Context, maddr address.Address, n abi.SectorNumber, tsk types.TipSetKey) (*minertypes.SectorPreCommitOnChainInfo, error) {
+func (a *StateAPI) StateSectorPreCommitInfo(ctx context.Context, maddr address.Address, n abi.SectorNumber, tsk types.TipSetKey) (*miner.SectorPreCommitOnChainInfo, error) {
 	ts, err := a.Chain.GetTipSetFromKey(ctx, tsk)
 	if err != nil {
 		return nil, xerrors.Errorf("loading tipset %s: %w", tsk, err)
@@ -1315,7 +1389,7 @@ func (m *StateModule) MsigGetPending(ctx context.Context, addr address.Address,
 var initialPledgeNum = types.NewInt(110)
 var initialPledgeDen = types.NewInt(100)
 
-func (a *StateAPI) StateMinerPreCommitDepositForPower(ctx context.Context, maddr address.Address, pci minertypes.SectorPreCommitInfo, tsk types.TipSetKey) (types.BigInt, error) {
+func (a *StateAPI) StateMinerPreCommitDepositForPower(ctx context.Context, maddr address.Address, pci miner.SectorPreCommitInfo, tsk types.TipSetKey) (types.BigInt, error) {
 	ts, err := a.Chain.GetTipSetFromKey(ctx, tsk)
 	if err != nil {
 		return types.EmptyInt, xerrors.Errorf("loading tipset %s: %w", tsk, err)
@@ -1347,7 +1421,7 @@ func (a *StateAPI) StateMinerPreCommitDepositForPower(ctx context.Context, maddr
 			sectorWeight = builtin.QAPowerForWeight(ssize, duration, w, vw)
 		}
 	} else {
-		sectorWeight = minertypes.QAPowerMax(ssize)
+		sectorWeight = miner.QAPowerMax(ssize)
 	}
 
 	var powerSmoothed builtin.FilterEstimate
@@ -1379,7 +1453,7 @@ func (a *StateAPI) StateMinerPreCommitDepositForPower(ctx context.Context, maddr
 	return types.BigDiv(types.BigMul(deposit, initialPledgeNum), initialPledgeDen), nil
 }
 
-func (a *StateAPI) StateMinerInitialPledgeCollateral(ctx context.Context, maddr address.Address, pci minertypes.SectorPreCommitInfo, tsk types.TipSetKey) (types.BigInt, error) {
+func (a *StateAPI) StateMinerInitialPledgeCollateral(ctx context.Context, maddr address.Address, pci miner.SectorPreCommitInfo, tsk types.TipSetKey) (types.BigInt, error) {
 	// TODO: this repeats a lot of the previous function. Fix that.
 	ts, err := a.Chain.GetTipSetFromKey(ctx, tsk)
 	if err != nil {
diff --git a/node/impl/storminer.go b/node/impl/storminer.go
index 069cdff7f..6fd6045b4 100644
--- a/node/impl/storminer.go
+++ b/node/impl/storminer.go
@@ -35,7 +35,6 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	builtintypes "github.com/filecoin-project/go-state-types/builtin"
-	minertypes "github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/network"
 
 	"github.com/filecoin-project/lotus/api"
@@ -43,6 +42,7 @@ import (
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/builtin"
+	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/gen"
 	"github.com/filecoin-project/lotus/chain/types"
 	mktsdagstore "github.com/filecoin-project/lotus/markets/dagstore"
@@ -497,7 +497,7 @@ func (sm *StorageMinerAPI) SectorReceive(ctx context.Context, meta api.RemoteSec
 	return err
 }
 
-func (sm *StorageMinerAPI) ComputeWindowPoSt(ctx context.Context, dlIdx uint64, tsk types.TipSetKey) ([]minertypes.SubmitWindowedPoStParams, error) {
+func (sm *StorageMinerAPI) ComputeWindowPoSt(ctx context.Context, dlIdx uint64, tsk types.TipSetKey) ([]lminer.SubmitWindowedPoStParams, error) {
 	var ts *types.TipSet
 	var err error
 	if tsk == types.EmptyTSK {
@@ -1404,7 +1404,7 @@ func (sm *StorageMinerAPI) withdrawBalance(ctx context.Context, amount abi.Token
 		amount = available
 	}
 
-	params, err := actors.SerializeParams(&minertypes.WithdrawBalanceParams{
+	params, err := actors.SerializeParams(&lminer.WithdrawBalanceParams{
 		AmountRequested: amount,
 	})
 	if err != nil {
diff --git a/node/modules/storageminer.go b/node/modules/storageminer.go
index 29345d035..12879cd64 100644
--- a/node/modules/storageminer.go
+++ b/node/modules/storageminer.go
@@ -157,7 +157,8 @@ func SealProofType(maddr dtypes.MinerAddress, fnapi v1api.FullNode) (abi.Registe
 		return 0, err
 	}
 
-	return miner.PreferredSealProofTypeFromWindowPoStType(networkVersion, mi.WindowPoStProofType)
+	// node seal proof type does not decide whether or not we use synthetic porep
+	return miner.PreferredSealProofTypeFromWindowPoStType(networkVersion, mi.WindowPoStProofType, false)
 }
 
 func AddressSelector(addrConf *config.MinerAddressConfig) func() (*ctladdr.AddressSelector, error) {
@@ -1016,6 +1017,7 @@ func NewSetSealConfigFunc(r repo.LockedRepo) (dtypes.SetSealingConfigFunc, error
 				TerminateBatchMin:                      cfg.TerminateBatchMin,
 				TerminateBatchWait:                     config.Duration(cfg.TerminateBatchWait),
 				MaxSectorProveCommitsSubmittedPerEpoch: cfg.MaxSectorProveCommitsSubmittedPerEpoch,
+				UseSyntheticPoRep:                      cfg.UseSyntheticPoRep,
 			}
 			c.SetSealingConfig(newCfg)
 		})
@@ -1060,6 +1062,7 @@ func ToSealingConfig(dealmakingCfg config.DealmakingConfig, sealingCfg config.Se
 		TerminateBatchMax:  sealingCfg.TerminateBatchMax,
 		TerminateBatchMin:  sealingCfg.TerminateBatchMin,
 		TerminateBatchWait: time.Duration(sealingCfg.TerminateBatchWait),
+		UseSyntheticPoRep:  sealingCfg.UseSyntheticPoRep,
 	}
 }
 
diff --git a/paychmgr/cbor_gen.go b/paychmgr/cbor_gen.go
index b3880aa10..f97c176a3 100644
--- a/paychmgr/cbor_gen.go
+++ b/paychmgr/cbor_gen.go
@@ -41,7 +41,7 @@ func (t *VoucherInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Proof"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Proof")); err != nil {
+	if _, err := cw.WriteString(string("Proof")); err != nil {
 		return err
 	}
 
@@ -65,7 +65,7 @@ func (t *VoucherInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Voucher"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Voucher")); err != nil {
+	if _, err := cw.WriteString(string("Voucher")); err != nil {
 		return err
 	}
 
@@ -81,7 +81,7 @@ func (t *VoucherInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Submitted"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Submitted")); err != nil {
+	if _, err := cw.WriteString(string("Submitted")); err != nil {
 		return err
 	}
 
@@ -218,7 +218,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Amount"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Amount")); err != nil {
+	if _, err := cw.WriteString(string("Amount")); err != nil {
 		return err
 	}
 
@@ -234,7 +234,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Target"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Target")); err != nil {
+	if _, err := cw.WriteString(string("Target")); err != nil {
 		return err
 	}
 
@@ -250,7 +250,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Channel"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Channel")); err != nil {
+	if _, err := cw.WriteString(string("Channel")); err != nil {
 		return err
 	}
 
@@ -266,7 +266,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Control"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Control")); err != nil {
+	if _, err := cw.WriteString(string("Control")); err != nil {
 		return err
 	}
 
@@ -282,7 +282,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("NextLane"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("NextLane")); err != nil {
+	if _, err := cw.WriteString(string("NextLane")); err != nil {
 		return err
 	}
 
@@ -298,7 +298,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Settling"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Settling")); err != nil {
+	if _, err := cw.WriteString(string("Settling")); err != nil {
 		return err
 	}
 
@@ -314,7 +314,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Vouchers"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Vouchers")); err != nil {
+	if _, err := cw.WriteString(string("Vouchers")); err != nil {
 		return err
 	}
 
@@ -339,7 +339,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("ChannelID"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("ChannelID")); err != nil {
+	if _, err := cw.WriteString(string("ChannelID")); err != nil {
 		return err
 	}
 
@@ -350,7 +350,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.ChannelID))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.ChannelID)); err != nil {
+	if _, err := cw.WriteString(string(t.ChannelID)); err != nil {
 		return err
 	}
 
@@ -362,7 +362,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("CreateMsg"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("CreateMsg")); err != nil {
+	if _, err := cw.WriteString(string("CreateMsg")); err != nil {
 		return err
 	}
 
@@ -384,7 +384,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Direction"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Direction")); err != nil {
+	if _, err := cw.WriteString(string("Direction")); err != nil {
 		return err
 	}
 
@@ -400,7 +400,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("AddFundsMsg"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("AddFundsMsg")); err != nil {
+	if _, err := cw.WriteString(string("AddFundsMsg")); err != nil {
 		return err
 	}
 
@@ -422,7 +422,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PendingAmount"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PendingAmount")); err != nil {
+	if _, err := cw.WriteString(string("PendingAmount")); err != nil {
 		return err
 	}
 
@@ -438,7 +438,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("AvailableAmount"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("AvailableAmount")); err != nil {
+	if _, err := cw.WriteString(string("AvailableAmount")); err != nil {
 		return err
 	}
 
@@ -454,7 +454,7 @@ func (t *ChannelInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PendingAvailableAmount"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PendingAvailableAmount")); err != nil {
+	if _, err := cw.WriteString(string("PendingAvailableAmount")); err != nil {
 		return err
 	}
 
@@ -606,13 +606,32 @@ func (t *ChannelInfo) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for i := 0; i < int(extra); i++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				var v VoucherInfo
-				if err := v.UnmarshalCBOR(cr); err != nil {
-					return err
+					{
+
+						b, err := cr.ReadByte()
+						if err != nil {
+							return err
+						}
+						if b != cbg.CborNull[0] {
+							if err := cr.UnreadByte(); err != nil {
+								return err
+							}
+							t.Vouchers[i] = new(VoucherInfo)
+							if err := t.Vouchers[i].UnmarshalCBOR(cr); err != nil {
+								return xerrors.Errorf("unmarshaling t.Vouchers[i] pointer: %w", err)
+							}
+						}
+
+					}
 				}
-
-				t.Vouchers[i] = &v
 			}
 
 			// t.ChannelID (string) (string)
@@ -746,7 +765,7 @@ func (t *MsgInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Err"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Err")); err != nil {
+	if _, err := cw.WriteString(string("Err")); err != nil {
 		return err
 	}
 
@@ -757,7 +776,7 @@ func (t *MsgInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Err))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Err)); err != nil {
+	if _, err := cw.WriteString(string(t.Err)); err != nil {
 		return err
 	}
 
@@ -769,7 +788,7 @@ func (t *MsgInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("MsgCid"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("MsgCid")); err != nil {
+	if _, err := cw.WriteString(string("MsgCid")); err != nil {
 		return err
 	}
 
@@ -785,7 +804,7 @@ func (t *MsgInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Received"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Received")); err != nil {
+	if _, err := cw.WriteString(string("Received")); err != nil {
 		return err
 	}
 
@@ -801,7 +820,7 @@ func (t *MsgInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("ChannelID"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("ChannelID")); err != nil {
+	if _, err := cw.WriteString(string("ChannelID")); err != nil {
 		return err
 	}
 
@@ -812,7 +831,7 @@ func (t *MsgInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.ChannelID))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.ChannelID)); err != nil {
+	if _, err := cw.WriteString(string(t.ChannelID)); err != nil {
 		return err
 	}
 	return nil
diff --git a/storage/pipeline/cbor_gen.go b/storage/pipeline/cbor_gen.go
index 57a668ae6..c832f8a14 100644
--- a/storage/pipeline/cbor_gen.go
+++ b/storage/pipeline/cbor_gen.go
@@ -43,7 +43,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Log"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Log")); err != nil {
+	if _, err := cw.WriteString(string("Log")); err != nil {
 		return err
 	}
 
@@ -68,7 +68,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("CommD"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("CommD")); err != nil {
+	if _, err := cw.WriteString(string("CommD")); err != nil {
 		return err
 	}
 
@@ -90,7 +90,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("CommR"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("CommR")); err != nil {
+	if _, err := cw.WriteString(string("CommR")); err != nil {
 		return err
 	}
 
@@ -112,7 +112,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Proof"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Proof")); err != nil {
+	if _, err := cw.WriteString(string("Proof")); err != nil {
 		return err
 	}
 
@@ -136,7 +136,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("State"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("State")); err != nil {
+	if _, err := cw.WriteString(string("State")); err != nil {
 		return err
 	}
 
@@ -147,7 +147,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.State))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.State)); err != nil {
+	if _, err := cw.WriteString(string(t.State)); err != nil {
 		return err
 	}
 
@@ -159,7 +159,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Pieces"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Pieces")); err != nil {
+	if _, err := cw.WriteString(string("Pieces")); err != nil {
 		return err
 	}
 
@@ -184,7 +184,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Return"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Return")); err != nil {
+	if _, err := cw.WriteString(string("Return")); err != nil {
 		return err
 	}
 
@@ -195,7 +195,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Return))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Return)); err != nil {
+	if _, err := cw.WriteString(string(t.Return)); err != nil {
 		return err
 	}
 
@@ -207,7 +207,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("LastErr"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("LastErr")); err != nil {
+	if _, err := cw.WriteString(string("LastErr")); err != nil {
 		return err
 	}
 
@@ -218,7 +218,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.LastErr))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.LastErr)); err != nil {
+	if _, err := cw.WriteString(string(t.LastErr)); err != nil {
 		return err
 	}
 
@@ -230,7 +230,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("CCPieces"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("CCPieces")); err != nil {
+	if _, err := cw.WriteString(string("CCPieces")); err != nil {
 		return err
 	}
 
@@ -255,7 +255,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("CCUpdate"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("CCUpdate")); err != nil {
+	if _, err := cw.WriteString(string("CCUpdate")); err != nil {
 		return err
 	}
 
@@ -271,7 +271,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("SeedEpoch"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("SeedEpoch")); err != nil {
+	if _, err := cw.WriteString(string("SeedEpoch")); err != nil {
 		return err
 	}
 
@@ -293,7 +293,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("SeedValue"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("SeedValue")); err != nil {
+	if _, err := cw.WriteString(string("SeedValue")); err != nil {
 		return err
 	}
 
@@ -317,7 +317,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("SectorType"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("SectorType")); err != nil {
+	if _, err := cw.WriteString(string("SectorType")); err != nil {
 		return err
 	}
 
@@ -339,7 +339,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("TicketEpoch"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("TicketEpoch")); err != nil {
+	if _, err := cw.WriteString(string("TicketEpoch")); err != nil {
 		return err
 	}
 
@@ -361,7 +361,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("TicketValue"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("TicketValue")); err != nil {
+	if _, err := cw.WriteString(string("TicketValue")); err != nil {
 		return err
 	}
 
@@ -385,7 +385,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("CreationTime"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("CreationTime")); err != nil {
+	if _, err := cw.WriteString(string("CreationTime")); err != nil {
 		return err
 	}
 
@@ -407,7 +407,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("SectorNumber"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("SectorNumber")); err != nil {
+	if _, err := cw.WriteString(string("SectorNumber")); err != nil {
 		return err
 	}
 
@@ -423,7 +423,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("TerminatedAt"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("TerminatedAt")); err != nil {
+	if _, err := cw.WriteString(string("TerminatedAt")); err != nil {
 		return err
 	}
 
@@ -445,7 +445,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("UpdateSealed"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("UpdateSealed")); err != nil {
+	if _, err := cw.WriteString(string("UpdateSealed")); err != nil {
 		return err
 	}
 
@@ -467,7 +467,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("CommitMessage"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("CommitMessage")); err != nil {
+	if _, err := cw.WriteString(string("CommitMessage")); err != nil {
 		return err
 	}
 
@@ -489,7 +489,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("InvalidProofs"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("InvalidProofs")); err != nil {
+	if _, err := cw.WriteString(string("InvalidProofs")); err != nil {
 		return err
 	}
 
@@ -505,7 +505,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PreCommit1Out"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PreCommit1Out")); err != nil {
+	if _, err := cw.WriteString(string("PreCommit1Out")); err != nil {
 		return err
 	}
 
@@ -529,7 +529,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("FaultReportMsg"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("FaultReportMsg")); err != nil {
+	if _, err := cw.WriteString(string("FaultReportMsg")); err != nil {
 		return err
 	}
 
@@ -551,7 +551,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("UpdateUnsealed"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("UpdateUnsealed")); err != nil {
+	if _, err := cw.WriteString(string("UpdateUnsealed")); err != nil {
 		return err
 	}
 
@@ -573,7 +573,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PreCommit1Fails"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PreCommit1Fails")); err != nil {
+	if _, err := cw.WriteString(string("PreCommit1Fails")); err != nil {
 		return err
 	}
 
@@ -589,7 +589,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PreCommit2Fails"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PreCommit2Fails")); err != nil {
+	if _, err := cw.WriteString(string("PreCommit2Fails")); err != nil {
 		return err
 	}
 
@@ -605,7 +605,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PreCommitTipSet"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PreCommitTipSet")); err != nil {
+	if _, err := cw.WriteString(string("PreCommitTipSet")); err != nil {
 		return err
 	}
 
@@ -621,7 +621,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("RemoteDataCache"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("RemoteDataCache")); err != nil {
+	if _, err := cw.WriteString(string("RemoteDataCache")); err != nil {
 		return err
 	}
 
@@ -637,7 +637,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PreCommitDeposit"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PreCommitDeposit")); err != nil {
+	if _, err := cw.WriteString(string("PreCommitDeposit")); err != nil {
 		return err
 	}
 
@@ -653,7 +653,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("PreCommitMessage"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("PreCommitMessage")); err != nil {
+	if _, err := cw.WriteString(string("PreCommitMessage")); err != nil {
 		return err
 	}
 
@@ -675,7 +675,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("RemoteDataSealed"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("RemoteDataSealed")); err != nil {
+	if _, err := cw.WriteString(string("RemoteDataSealed")); err != nil {
 		return err
 	}
 
@@ -691,7 +691,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("TerminateMessage"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("TerminateMessage")); err != nil {
+	if _, err := cw.WriteString(string("TerminateMessage")); err != nil {
 		return err
 	}
 
@@ -713,7 +713,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("RemoteDataUnsealed"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("RemoteDataUnsealed")); err != nil {
+	if _, err := cw.WriteString(string("RemoteDataUnsealed")); err != nil {
 		return err
 	}
 
@@ -729,7 +729,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("ReplicaUpdateProof"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("ReplicaUpdateProof")); err != nil {
+	if _, err := cw.WriteString(string("ReplicaUpdateProof")); err != nil {
 		return err
 	}
 
@@ -753,7 +753,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("RemoteDataFinalized"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("RemoteDataFinalized")); err != nil {
+	if _, err := cw.WriteString(string("RemoteDataFinalized")); err != nil {
 		return err
 	}
 
@@ -769,7 +769,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("ReplicaUpdateMessage"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("ReplicaUpdateMessage")); err != nil {
+	if _, err := cw.WriteString(string("ReplicaUpdateMessage")); err != nil {
 		return err
 	}
 
@@ -791,7 +791,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("RemoteCommit1Endpoint"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("RemoteCommit1Endpoint")); err != nil {
+	if _, err := cw.WriteString(string("RemoteCommit1Endpoint")); err != nil {
 		return err
 	}
 
@@ -802,7 +802,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.RemoteCommit1Endpoint))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.RemoteCommit1Endpoint)); err != nil {
+	if _, err := cw.WriteString(string(t.RemoteCommit1Endpoint)); err != nil {
 		return err
 	}
 
@@ -814,7 +814,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("RemoteCommit2Endpoint"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("RemoteCommit2Endpoint")); err != nil {
+	if _, err := cw.WriteString(string("RemoteCommit2Endpoint")); err != nil {
 		return err
 	}
 
@@ -825,7 +825,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.RemoteCommit2Endpoint))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.RemoteCommit2Endpoint)); err != nil {
+	if _, err := cw.WriteString(string(t.RemoteCommit2Endpoint)); err != nil {
 		return err
 	}
 
@@ -837,7 +837,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("RemoteSealingDoneEndpoint"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("RemoteSealingDoneEndpoint")); err != nil {
+	if _, err := cw.WriteString(string("RemoteSealingDoneEndpoint")); err != nil {
 		return err
 	}
 
@@ -848,7 +848,7 @@ func (t *SectorInfo) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.RemoteSealingDoneEndpoint))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.RemoteSealingDoneEndpoint)); err != nil {
+	if _, err := cw.WriteString(string(t.RemoteSealingDoneEndpoint)); err != nil {
 		return err
 	}
 	return nil
@@ -913,13 +913,22 @@ func (t *SectorInfo) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for i := 0; i < int(extra); i++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				var v Log
-				if err := v.UnmarshalCBOR(cr); err != nil {
-					return err
+					{
+
+						if err := t.Log[i].UnmarshalCBOR(cr); err != nil {
+							return xerrors.Errorf("unmarshaling t.Log[i]: %w", err)
+						}
+
+					}
 				}
-
-				t.Log[i] = v
 			}
 
 			// t.CommD (cid.Cid) (struct)
@@ -1022,13 +1031,22 @@ func (t *SectorInfo) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for i := 0; i < int(extra); i++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				var v api.SectorPiece
-				if err := v.UnmarshalCBOR(cr); err != nil {
-					return err
+					{
+
+						if err := t.Pieces[i].UnmarshalCBOR(cr); err != nil {
+							return xerrors.Errorf("unmarshaling t.Pieces[i]: %w", err)
+						}
+
+					}
 				}
-
-				t.Pieces[i] = v
 			}
 
 			// t.Return (sealing.ReturnState) (string)
@@ -1074,13 +1092,22 @@ func (t *SectorInfo) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for i := 0; i < int(extra); i++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				var v api.SectorPiece
-				if err := v.UnmarshalCBOR(cr); err != nil {
-					return err
+					{
+
+						if err := t.CCPieces[i].UnmarshalCBOR(cr); err != nil {
+							return xerrors.Errorf("unmarshaling t.CCPieces[i]: %w", err)
+						}
+
+					}
 				}
-
-				t.CCPieces[i] = v
 			}
 
 			// t.CCUpdate (bool) (bool)
@@ -1700,7 +1727,7 @@ func (t *Log) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Kind"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Kind")); err != nil {
+	if _, err := cw.WriteString(string("Kind")); err != nil {
 		return err
 	}
 
@@ -1711,7 +1738,7 @@ func (t *Log) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Kind))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Kind)); err != nil {
+	if _, err := cw.WriteString(string(t.Kind)); err != nil {
 		return err
 	}
 
@@ -1723,7 +1750,7 @@ func (t *Log) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Trace"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Trace")); err != nil {
+	if _, err := cw.WriteString(string("Trace")); err != nil {
 		return err
 	}
 
@@ -1734,7 +1761,7 @@ func (t *Log) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Trace))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Trace)); err != nil {
+	if _, err := cw.WriteString(string(t.Trace)); err != nil {
 		return err
 	}
 
@@ -1746,7 +1773,7 @@ func (t *Log) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Message"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Message")); err != nil {
+	if _, err := cw.WriteString(string("Message")); err != nil {
 		return err
 	}
 
@@ -1757,7 +1784,7 @@ func (t *Log) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Message))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Message)); err != nil {
+	if _, err := cw.WriteString(string(t.Message)); err != nil {
 		return err
 	}
 
@@ -1769,7 +1796,7 @@ func (t *Log) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Timestamp"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Timestamp")); err != nil {
+	if _, err := cw.WriteString(string("Timestamp")); err != nil {
 		return err
 	}
 
diff --git a/storage/pipeline/checks.go b/storage/pipeline/checks.go
index b243804cc..ecd160231 100644
--- a/storage/pipeline/checks.go
+++ b/storage/pipeline/checks.go
@@ -106,13 +106,15 @@ func checkPrecommit(ctx context.Context, maddr address.Address, si SectorInfo, t
 		return err
 	}
 
-	commD, err := api.StateComputeDataCID(ctx, maddr, si.SectorType, si.dealIDs(), tsk)
-	if err != nil {
-		return &ErrApi{xerrors.Errorf("calling StateComputeDataCommitment: %w", err)}
-	}
+	if si.hasDeals() {
+		commD, err := api.StateComputeDataCID(ctx, maddr, si.SectorType, si.dealIDs(), tsk)
+		if err != nil {
+			return &ErrApi{xerrors.Errorf("calling StateComputeDataCommitment: %w", err)}
+		}
 
-	if si.CommD == nil || !commD.Equals(*si.CommD) {
-		return &ErrBadCommD{xerrors.Errorf("on chain CommD differs from sector: %s != %s", commD, si.CommD)}
+		if si.CommD == nil || !commD.Equals(*si.CommD) {
+			return &ErrBadCommD{xerrors.Errorf("on chain CommD differs from sector: %s != %s", commD, si.CommD)}
+		}
 	}
 
 	pci, err := api.StateSectorPreCommitInfo(ctx, maddr, si.SectorNumber, tsk)
diff --git a/storage/pipeline/commit_batch.go b/storage/pipeline/commit_batch.go
index 9948b5432..754f31763 100644
--- a/storage/pipeline/commit_batch.go
+++ b/storage/pipeline/commit_batch.go
@@ -16,12 +16,12 @@ import (
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/network"
 	"github.com/filecoin-project/go-state-types/proof"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/actors/policy"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/node/config"
diff --git a/storage/pipeline/precommit_batch.go b/storage/pipeline/precommit_batch.go
index 7e25d500b..3a86c8628 100644
--- a/storage/pipeline/precommit_batch.go
+++ b/storage/pipeline/precommit_batch.go
@@ -13,12 +13,12 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/network"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/actors/policy"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/node/config"
diff --git a/storage/pipeline/precommit_policy.go b/storage/pipeline/precommit_policy.go
index e1b6e6be7..6e234f930 100644
--- a/storage/pipeline/precommit_policy.go
+++ b/storage/pipeline/precommit_policy.go
@@ -85,10 +85,15 @@ func (p *BasicPreCommitPolicy) Expiration(ctx context.Context, ps ...api.SectorP
 	}
 
 	if end == nil {
-		// no deal pieces, get expiration for committed capacity sector
-		expirationDuration, err := p.getCCSectorLifetime()
+		nv, err := p.api.StateNetworkVersion(ctx, types.EmptyTSK)
 		if err != nil {
-			return 0, err
+			return 0, xerrors.Errorf("failed to get network version: %w", err)
+		}
+
+		// no deal pieces, get expiration for committed capacity sector
+		expirationDuration, err := p.getCCSectorLifetime(nv)
+		if err != nil {
+			return 0, xerrors.Errorf("failed to get cc sector lifetime: %w", err)
 		}
 
 		tmp := ts.Height() + expirationDuration
@@ -105,25 +110,30 @@ func (p *BasicPreCommitPolicy) Expiration(ctx context.Context, ps ...api.SectorP
 	return *end, nil
 }
 
-func (p *BasicPreCommitPolicy) getCCSectorLifetime() (abi.ChainEpoch, error) {
+func (p *BasicPreCommitPolicy) getCCSectorLifetime(nv network.Version) (abi.ChainEpoch, error) {
 	c, err := p.getSealingConfig()
 	if err != nil {
 		return 0, xerrors.Errorf("sealing config load error: %w", err)
 	}
 
+	maxCommitment, err := policy.GetMaxSectorExpirationExtension(nv)
+	if err != nil {
+		return 0, xerrors.Errorf("failed to get max extension: %w", err)
+	}
+
 	var ccLifetimeEpochs = abi.ChainEpoch(uint64(c.CommittedCapacitySectorLifetime.Seconds()) / builtin.EpochDurationSeconds)
 	// if zero value in config, assume default sector extension
 	if ccLifetimeEpochs == 0 {
-		ccLifetimeEpochs = policy.GetMaxSectorExpirationExtension()
+		ccLifetimeEpochs = maxCommitment
 	}
 
 	if minExpiration := abi.ChainEpoch(miner.MinSectorExpiration); ccLifetimeEpochs < minExpiration {
 		log.Warnf("value for CommittedCapacitySectorLiftime is too short, using default minimum (%d epochs)", minExpiration)
 		return minExpiration, nil
 	}
-	if maxExpiration := policy.GetMaxSectorExpirationExtension(); ccLifetimeEpochs > maxExpiration {
-		log.Warnf("value for CommittedCapacitySectorLiftime is too long, using default maximum (%d epochs)", maxExpiration)
-		return maxExpiration, nil
+	if ccLifetimeEpochs > maxCommitment {
+		log.Warnf("value for CommittedCapacitySectorLiftime is too long, using default maximum (%d epochs)", maxCommitment)
+		return maxCommitment, nil
 	}
 
 	return ccLifetimeEpochs - p.provingBuffer, nil
diff --git a/storage/pipeline/precommit_policy_test.go b/storage/pipeline/precommit_policy_test.go
index 9f23e58d6..7865560de 100644
--- a/storage/pipeline/precommit_policy_test.go
+++ b/storage/pipeline/precommit_policy_test.go
@@ -68,7 +68,9 @@ func TestBasicPolicyEmptySector(t *testing.T) {
 	require.NoError(t, err)
 
 	// as set when there are no deal pieces
-	expected := h + policy.GetMaxSectorExpirationExtension() - pBuffer
+	maxExtension, err := policy.GetMaxSectorExpirationExtension(build.TestNetworkVersion)
+	assert.NoError(t, err)
+	expected := h + maxExtension - pBuffer
 	assert.Equal(t, int(expected), int(exp))
 }
 
@@ -132,7 +134,7 @@ func TestBasicPolicyMostConstrictiveSchedule(t *testing.T) {
 
 func TestBasicPolicyIgnoresExistingScheduleIfExpired(t *testing.T) {
 	cfg := fakeConfigGetter(nil)
-	policy := pipeline.NewBasicPreCommitPolicy(&fakeChain{
+	pcp := pipeline.NewBasicPreCommitPolicy(&fakeChain{
 		h: abi.ChainEpoch(55),
 	}, cfg, 0)
 
@@ -152,11 +154,14 @@ func TestBasicPolicyIgnoresExistingScheduleIfExpired(t *testing.T) {
 		},
 	}
 
-	exp, err := policy.Expiration(context.Background(), pieces...)
+	exp, err := pcp.Expiration(context.Background(), pieces...)
+	require.NoError(t, err)
+
+	maxLifetime, err := policy.GetMaxSectorExpirationExtension(build.TestNetworkVersion)
 	require.NoError(t, err)
 
 	// Treated as a CC sector, so expiration becomes currEpoch + maxLifetime = 55 + 1555200
-	assert.Equal(t, 1555255, int(exp))
+	assert.Equal(t, 55+maxLifetime, exp)
 }
 
 func TestMissingDealIsIgnored(t *testing.T) {
diff --git a/storage/pipeline/sealiface/config.go b/storage/pipeline/sealiface/config.go
index 99715fc28..e41b143ec 100644
--- a/storage/pipeline/sealiface/config.go
+++ b/storage/pipeline/sealiface/config.go
@@ -60,4 +60,6 @@ type Config struct {
 	TerminateBatchMax  uint64
 	TerminateBatchMin  uint64
 	TerminateBatchWait time.Duration
+
+	UseSyntheticPoRep bool
 }
diff --git a/storage/pipeline/sealing.go b/storage/pipeline/sealing.go
index d664de1e2..65d3fb14b 100644
--- a/storage/pipeline/sealing.go
+++ b/storage/pipeline/sealing.go
@@ -15,7 +15,6 @@ import (
 	"github.com/filecoin-project/go-bitfield"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
@@ -24,6 +23,7 @@ import (
 	"github.com/filecoin-project/go-storedcounter"
 
 	"github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/events"
 	"github.com/filecoin-project/lotus/chain/types"
@@ -339,7 +339,12 @@ func (m *Sealing) currentSealProof(ctx context.Context) (abi.RegisteredSealProof
 		return 0, err
 	}
 
-	return lminer.PreferredSealProofTypeFromWindowPoStType(ver, mi.WindowPoStProofType)
+	c, err := m.getConfig()
+	if err != nil {
+		return 0, err
+	}
+
+	return lminer.PreferredSealProofTypeFromWindowPoStType(ver, mi.WindowPoStProofType, c.UseSyntheticPoRep)
 }
 
 func (m *Sealing) minerSector(spt abi.RegisteredSealProof, num abi.SectorNumber) storiface.SectorRef {
diff --git a/storage/pipeline/states_failed.go b/storage/pipeline/states_failed.go
index 203f14910..3323c4c9b 100644
--- a/storage/pipeline/states_failed.go
+++ b/storage/pipeline/states_failed.go
@@ -10,12 +10,12 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-commp-utils/zerocomm"
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/exitcode"
 	"github.com/filecoin-project/go-statemachine"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/chain/actors/builtin/market"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/storage/sealer/storiface"
 )
diff --git a/storage/pipeline/states_replica_update.go b/storage/pipeline/states_replica_update.go
index e1b9cfc30..6717f49a6 100644
--- a/storage/pipeline/states_replica_update.go
+++ b/storage/pipeline/states_replica_update.go
@@ -10,12 +10,12 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/exitcode"
 	"github.com/filecoin-project/go-statemachine"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/actors/policy"
 	"github.com/filecoin-project/lotus/chain/types"
 )
diff --git a/storage/pipeline/states_sealing.go b/storage/pipeline/states_sealing.go
index 48d024f85..a562e635c 100644
--- a/storage/pipeline/states_sealing.go
+++ b/storage/pipeline/states_sealing.go
@@ -17,7 +17,6 @@ import (
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/exitcode"
 	"github.com/filecoin-project/go-state-types/network"
@@ -26,6 +25,7 @@ import (
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/actors/policy"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/storage/pipeline/lib/nullreader"
@@ -399,7 +399,12 @@ func (m *Sealing) preCommitInfo(ctx statemachine.Context, sector SectorInfo) (*m
 	}
 
 	// Assume: both precommit msg & commit msg land on chain as early as possible
-	maxExpiration := ts.Height() + policy.GetPreCommitChallengeDelay() + policy.GetMaxSectorExpirationExtension()
+	maxExtension, err := policy.GetMaxSectorExpirationExtension(nv)
+	if err != nil {
+		return nil, big.Zero(), types.EmptyTSK, ctx.Send(SectorSealPreCommit1Failed{xerrors.Errorf("failed to get max extension: %w", err)})
+	}
+
+	maxExpiration := ts.Height() + policy.GetPreCommitChallengeDelay() + maxExtension
 	if expiration > maxExpiration {
 		expiration = maxExpiration
 	}
@@ -630,6 +635,7 @@ func (m *Sealing) handleCommitting(ctx statemachine.Context, sector SectorInfo)
 
 		porepProof, err = m.sealer.SealCommit2(sector.sealingCtx(ctx.Context()), m.minerSector(sector.SectorType, sector.SectorNumber), c2in)
 		if err != nil {
+			log.Errorw("Commit2 error", "error", err)
 			return ctx.Send(SectorComputeProofFailed{xerrors.Errorf("computing seal proof failed(2): %w", err)})
 		}
 	} else {
diff --git a/storage/sealer/cbor_gen.go b/storage/sealer/cbor_gen.go
index 4fa7fd980..22da1b520 100644
--- a/storage/sealer/cbor_gen.go
+++ b/storage/sealer/cbor_gen.go
@@ -40,7 +40,7 @@ func (t *Call) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("ID"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("ID")); err != nil {
+	if _, err := cw.WriteString(string("ID")); err != nil {
 		return err
 	}
 
@@ -56,7 +56,7 @@ func (t *Call) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("State"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("State")); err != nil {
+	if _, err := cw.WriteString(string("State")); err != nil {
 		return err
 	}
 
@@ -72,7 +72,7 @@ func (t *Call) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Result"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Result")); err != nil {
+	if _, err := cw.WriteString(string("Result")); err != nil {
 		return err
 	}
 
@@ -88,7 +88,7 @@ func (t *Call) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("RetType"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("RetType")); err != nil {
+	if _, err := cw.WriteString(string("RetType")); err != nil {
 		return err
 	}
 
@@ -99,7 +99,7 @@ func (t *Call) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.RetType))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.RetType)); err != nil {
+	if _, err := cw.WriteString(string(t.RetType)); err != nil {
 		return err
 	}
 	return nil
@@ -228,7 +228,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("ID"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("ID")); err != nil {
+	if _, err := cw.WriteString(string("ID")); err != nil {
 		return err
 	}
 
@@ -244,7 +244,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Status"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Status")); err != nil {
+	if _, err := cw.WriteString(string("Status")); err != nil {
 		return err
 	}
 
@@ -255,7 +255,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Status))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Status)); err != nil {
+	if _, err := cw.WriteString(string(t.Status)); err != nil {
 		return err
 	}
 
@@ -267,7 +267,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("StartTime"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("StartTime")); err != nil {
+	if _, err := cw.WriteString(string("StartTime")); err != nil {
 		return err
 	}
 
@@ -289,7 +289,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("WorkError"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("WorkError")); err != nil {
+	if _, err := cw.WriteString(string("WorkError")); err != nil {
 		return err
 	}
 
@@ -300,7 +300,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.WorkError))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.WorkError)); err != nil {
+	if _, err := cw.WriteString(string(t.WorkError)); err != nil {
 		return err
 	}
 
@@ -312,7 +312,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("WorkerCall"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("WorkerCall")); err != nil {
+	if _, err := cw.WriteString(string("WorkerCall")); err != nil {
 		return err
 	}
 
@@ -328,7 +328,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("WorkerHostname"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("WorkerHostname")); err != nil {
+	if _, err := cw.WriteString(string("WorkerHostname")); err != nil {
 		return err
 	}
 
@@ -339,7 +339,7 @@ func (t *WorkState) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.WorkerHostname))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.WorkerHostname)); err != nil {
+	if _, err := cw.WriteString(string(t.WorkerHostname)); err != nil {
 		return err
 	}
 	return nil
@@ -491,7 +491,7 @@ func (t *WorkID) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Method"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Method")); err != nil {
+	if _, err := cw.WriteString(string("Method")); err != nil {
 		return err
 	}
 
@@ -502,7 +502,7 @@ func (t *WorkID) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Method))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Method)); err != nil {
+	if _, err := cw.WriteString(string(t.Method)); err != nil {
 		return err
 	}
 
@@ -514,7 +514,7 @@ func (t *WorkID) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Params"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Params")); err != nil {
+	if _, err := cw.WriteString(string("Params")); err != nil {
 		return err
 	}
 
@@ -525,7 +525,7 @@ func (t *WorkID) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Params))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Params)); err != nil {
+	if _, err := cw.WriteString(string(t.Params)); err != nil {
 		return err
 	}
 	return nil
diff --git a/storage/sealer/ffiwrapper/sealer_cgo.go b/storage/sealer/ffiwrapper/sealer_cgo.go
index b11dec9ce..fec12f231 100644
--- a/storage/sealer/ffiwrapper/sealer_cgo.go
+++ b/storage/sealer/ffiwrapper/sealer_cgo.go
@@ -896,15 +896,49 @@ func (sb *Sealer) SealPreCommit2(ctx context.Context, sector storiface.SectorRef
 		return storiface.SectorCids{}, xerrors.Errorf("unmarshaling pc1 output: %w", err)
 	}
 
-	var ticket abi.SealRandomness
 	ti, found := p1odec["_lotus_SealRandomness"]
 
+	if abi.Synthetic[sector.ProofType] {
+		if !found {
+			return storiface.SectorCids{}, xerrors.Errorf("synthetic mode: ticket not found")
+		}
+	}
+
 	if found {
-		ticket, err = base64.StdEncoding.DecodeString(ti.(string))
+		ticket, err := base64.StdEncoding.DecodeString(ti.(string))
 		if err != nil {
 			return storiface.SectorCids{}, xerrors.Errorf("decoding ticket: %w", err)
 		}
 
+		if abi.Synthetic[sector.ProofType] {
+			// note: we generate synth porep challenges first because the C1 check below reads from those
+
+			err = ffi.GenerateSynthProofs(
+				sector.ProofType,
+				sealedCID,
+				unsealedCID,
+				paths.Cache,
+				paths.Sealed,
+				sector.ID.Number,
+				sector.ID.Miner, ticket,
+				[]abi.PieceInfo{{Size: abi.PaddedPieceSize(ssize), PieceCID: unsealedCID}})
+			if err != nil {
+				log.Warn("GenerateSynthProofs() failed: ", err)
+				log.Warnf("num:%d tkt:%v, sealedCID:%v, unsealedCID:%v", sector.ID.Number, ticket, sealedCID, unsealedCID)
+				return storiface.SectorCids{}, xerrors.Errorf("generate synth proofs: %w", err)
+			}
+
+			if err = ffi.ClearLayerData(ssize, paths.Cache); err != nil {
+				log.Warn("failed to GenerateSynthProofs(): ", err)
+				log.Warnf("num:%d tkt:%v, sealedCID:%v, unsealedCID:%v", sector.ID.Number, ticket, sealedCID, unsealedCID)
+				return storiface.SectorCids{
+					Unsealed: unsealedCID,
+					Sealed:   sealedCID,
+				}, nil
+				// Note: non-fatal error.
+			}
+		}
+
 		for i := 0; i < PC2CheckRounds; i++ {
 			var sd [32]byte
 			_, _ = rand.Read(sd[:])
@@ -960,6 +994,7 @@ func (sb *Sealer) SealCommit1(ctx context.Context, sector storiface.SectorRef, t
 
 		return nil, xerrors.Errorf("StandaloneSealCommit: %w", err)
 	}
+
 	return output, nil
 }
 
@@ -1149,6 +1184,13 @@ func (sb *Sealer) FinalizeSector(ctx context.Context, sector storiface.SectorRef
 	}
 	defer done()
 
+	if abi.Synthetic[sector.ProofType] {
+		if err = ffi.ClearSyntheticProofs(uint64(ssize), paths.Cache); err != nil {
+			log.Warn("Unable to delete Synth cache:", err)
+			// Pass-Thru on error.
+		}
+	}
+
 	return ffi.ClearCache(uint64(ssize), paths.Cache)
 }
 
@@ -1187,6 +1229,13 @@ func (sb *Sealer) FinalizeSectorInto(ctx context.Context, sector storiface.Secto
 		}
 	}
 
+	if abi.Synthetic[sector.ProofType] {
+		if err = ffi.ClearSyntheticProofs(uint64(ssize), dest); err != nil {
+			log.Warn("Unable to delete Synth cache:", err)
+			// Pass-Thru on error.
+		}
+	}
+
 	return ffi.ClearCache(uint64(ssize), dest)
 }
 
@@ -1203,6 +1252,12 @@ func (sb *Sealer) FinalizeReplicaUpdate(ctx context.Context, sector storiface.Se
 		}
 		defer done()
 
+		if abi.Synthetic[sector.ProofType] {
+			if err = ffi.ClearSyntheticProofs(uint64(ssize), paths.Cache); err != nil {
+				return xerrors.Errorf("clear synth cache: %w", err)
+			}
+		}
+
 		if err := ffi.ClearCache(uint64(ssize), paths.Cache); err != nil {
 			return xerrors.Errorf("clear cache: %w", err)
 		}
@@ -1215,6 +1270,8 @@ func (sb *Sealer) FinalizeReplicaUpdate(ctx context.Context, sector storiface.Se
 		}
 		defer done()
 
+		// note: synth cache is not a thing for snapdeals
+
 		if err := ffi.ClearCache(uint64(ssize), paths.UpdateCache); err != nil {
 			return xerrors.Errorf("clear cache: %w", err)
 		}
diff --git a/storage/sealer/ffiwrapper/sealer_test.go b/storage/sealer/ffiwrapper/sealer_test.go
index 78c0ffb06..745cc7375 100644
--- a/storage/sealer/ffiwrapper/sealer_test.go
+++ b/storage/sealer/ffiwrapper/sealer_test.go
@@ -1087,7 +1087,111 @@ func TestDCAPCloses(t *testing.T) {
 		require.Equal(t, "baga6ea4seaqeje7jy4hufnybpo7ckxzujaigqbcxhdjq7ojb4b6xzgqdugkyciq", c.PieceCID.String())
 		require.True(t, clr.closed)
 	})
+}
 
+func TestSealAndVerifySynth(t *testing.T) {
+	sealProofType = abi.RegisteredSealProof_StackedDrg2KiBV1_1_Feat_SyntheticPoRep
+
+	if testing.Short() {
+		t.Skip("skipping test in short mode")
+	}
+
+	defer requireFDsClosed(t, openFDs(t))
+
+	if runtime.NumCPU() < 10 && os.Getenv("CI") == "" { // don't bother on slow hardware
+		t.Skip("this is slow")
+	}
+	_ = os.Setenv("RUST_LOG", "info")
+
+	getGrothParamFileAndVerifyingKeys(sectorSize)
+
+	cdir, err := os.MkdirTemp("", "sbtest-c-")
+	if err != nil {
+		t.Fatal(err)
+	}
+	miner := abi.ActorID(123)
+
+	synthPorRepVProofsName := "syn-porep-vanilla-proofs.dat"
+
+	printFileList := func(stage string, expectSynthPorep bool) {
+		var hasSynthPorep bool
+
+		fmt.Println("----file list:", stage)
+		err := filepath.Walk(cdir, func(path string, info os.FileInfo, err error) error {
+			if strings.Contains(path, synthPorRepVProofsName) {
+				hasSynthPorep = true
+			}
+			fmt.Println(path)
+			return nil
+		})
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		require.Equal(t, expectSynthPorep, hasSynthPorep)
+
+		fmt.Println("----")
+	}
+
+	sp := &basicfs.Provider{
+		Root: cdir,
+	}
+	sb, err := New(sp)
+	if err != nil {
+		t.Fatalf("%+v", err)
+	}
+	t.Cleanup(func() {
+		if t.Failed() {
+			fmt.Printf("not removing %s\n", cdir)
+			return
+		}
+		if err := os.RemoveAll(cdir); err != nil {
+			t.Error(err)
+		}
+	})
+
+	si := storiface.SectorRef{
+		ID:        abi.SectorID{Miner: miner, Number: 1},
+		ProofType: sealProofType,
+	}
+
+	s := seal{ref: si}
+
+	start := time.Now()
+
+	s.precommit(t, sb, si, func() {})
+
+	printFileList("precommit", true)
+
+	precommit := time.Now()
+
+	s.commit(t, sb, func() {})
+
+	printFileList("commit", true)
+
+	commit := time.Now()
+
+	post(t, sb, nil, s)
+
+	printFileList("post", true)
+
+	epost := time.Now()
+
+	post(t, sb, nil, s)
+
+	if err := sb.FinalizeSector(context.TODO(), si); err != nil {
+		t.Fatalf("%+v", err)
+	}
+
+	printFileList("finalize", false)
+
+	s.unseal(t, sb, sp, si, func() {})
+
+	printFileList("unseal", false)
+
+	fmt.Printf("PreCommit: %s\n", precommit.Sub(start).String())
+	fmt.Printf("Commit: %s\n", commit.Sub(precommit).String())
+	fmt.Printf("EPoSt: %s\n", epost.Sub(commit).String())
 }
 
 type closeAssertReader struct {
diff --git a/storage/sealer/storiface/cbor_gen.go b/storage/sealer/storiface/cbor_gen.go
index 2f82da3e6..0b42136ea 100644
--- a/storage/sealer/storiface/cbor_gen.go
+++ b/storage/sealer/storiface/cbor_gen.go
@@ -38,7 +38,7 @@ func (t *CallID) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("ID"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("ID")); err != nil {
+	if _, err := cw.WriteString(string("ID")); err != nil {
 		return err
 	}
 
@@ -62,7 +62,7 @@ func (t *CallID) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Sector"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Sector")); err != nil {
+	if _, err := cw.WriteString(string("Sector")); err != nil {
 		return err
 	}
 
@@ -173,7 +173,7 @@ func (t *SecDataHttpHeader) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Key"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Key")); err != nil {
+	if _, err := cw.WriteString(string("Key")); err != nil {
 		return err
 	}
 
@@ -184,7 +184,7 @@ func (t *SecDataHttpHeader) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Key))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Key)); err != nil {
+	if _, err := cw.WriteString(string(t.Key)); err != nil {
 		return err
 	}
 
@@ -196,7 +196,7 @@ func (t *SecDataHttpHeader) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Value"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Value")); err != nil {
+	if _, err := cw.WriteString(string("Value")); err != nil {
 		return err
 	}
 
@@ -207,7 +207,7 @@ func (t *SecDataHttpHeader) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Value))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.Value)); err != nil {
+	if _, err := cw.WriteString(string(t.Value)); err != nil {
 		return err
 	}
 	return nil
@@ -302,7 +302,7 @@ func (t *SectorLocation) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("URL"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("URL")); err != nil {
+	if _, err := cw.WriteString(string("URL")); err != nil {
 		return err
 	}
 
@@ -313,7 +313,7 @@ func (t *SectorLocation) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.URL))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string(t.URL)); err != nil {
+	if _, err := cw.WriteString(string(t.URL)); err != nil {
 		return err
 	}
 
@@ -325,7 +325,7 @@ func (t *SectorLocation) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Local"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Local")); err != nil {
+	if _, err := cw.WriteString(string("Local")); err != nil {
 		return err
 	}
 
@@ -341,7 +341,7 @@ func (t *SectorLocation) MarshalCBOR(w io.Writer) error {
 	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("Headers"))); err != nil {
 		return err
 	}
-	if _, err := io.WriteString(w, string("Headers")); err != nil {
+	if _, err := cw.WriteString(string("Headers")); err != nil {
 		return err
 	}
 
@@ -448,13 +448,22 @@ func (t *SectorLocation) UnmarshalCBOR(r io.Reader) (err error) {
 			}
 
 			for i := 0; i < int(extra); i++ {
+				{
+					var maj byte
+					var extra uint64
+					var err error
+					_ = maj
+					_ = extra
+					_ = err
 
-				var v SecDataHttpHeader
-				if err := v.UnmarshalCBOR(cr); err != nil {
-					return err
+					{
+
+						if err := t.Headers[i].UnmarshalCBOR(cr); err != nil {
+							return xerrors.Errorf("unmarshaling t.Headers[i]: %w", err)
+						}
+
+					}
 				}
-
-				t.Headers[i] = v
 			}
 
 		default:
diff --git a/storage/sealer/storiface/resources.go b/storage/sealer/storiface/resources.go
index 0fd80d79a..6f8d83265 100644
--- a/storage/sealer/storiface/resources.go
+++ b/storage/sealer/storiface/resources.go
@@ -587,13 +587,18 @@ func init() {
 		ResourceTable[sealtasks.TTDataCid][proof] = ResourceTable[sealtasks.TTAddPiece][abi.RegisteredSealProof_StackedDrg32GiBV1]
 	}
 
-	// V1_1 is the same as V1
+	// V1_1 and SynthethicpoRep is the same as V1
 	for _, m := range ResourceTable {
 		m[abi.RegisteredSealProof_StackedDrg2KiBV1_1] = m[abi.RegisteredSealProof_StackedDrg2KiBV1]
+		m[abi.RegisteredSealProof_StackedDrg2KiBV1_1_Feat_SyntheticPoRep] = m[abi.RegisteredSealProof_StackedDrg2KiBV1]
 		m[abi.RegisteredSealProof_StackedDrg8MiBV1_1] = m[abi.RegisteredSealProof_StackedDrg8MiBV1]
+		m[abi.RegisteredSealProof_StackedDrg8MiBV1_1_Feat_SyntheticPoRep] = m[abi.RegisteredSealProof_StackedDrg8MiBV1]
 		m[abi.RegisteredSealProof_StackedDrg512MiBV1_1] = m[abi.RegisteredSealProof_StackedDrg512MiBV1]
+		m[abi.RegisteredSealProof_StackedDrg512MiBV1_1_Feat_SyntheticPoRep] = m[abi.RegisteredSealProof_StackedDrg512MiBV1]
 		m[abi.RegisteredSealProof_StackedDrg32GiBV1_1] = m[abi.RegisteredSealProof_StackedDrg32GiBV1]
+		m[abi.RegisteredSealProof_StackedDrg32GiBV1_1_Feat_SyntheticPoRep] = m[abi.RegisteredSealProof_StackedDrg32GiBV1]
 		m[abi.RegisteredSealProof_StackedDrg64GiBV1_1] = m[abi.RegisteredSealProof_StackedDrg64GiBV1]
+		m[abi.RegisteredSealProof_StackedDrg64GiBV1_1_Feat_SyntheticPoRep] = m[abi.RegisteredSealProof_StackedDrg64GiBV1]
 	}
 }
 
diff --git a/storage/wdpost/wdpost_changehandler.go b/storage/wdpost/wdpost_changehandler.go
index 266b8b042..5f4b0ca0c 100644
--- a/storage/wdpost/wdpost_changehandler.go
+++ b/storage/wdpost/wdpost_changehandler.go
@@ -6,9 +6,9 @@ import (
 
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/dline"
 
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
@@ -531,12 +531,12 @@ func nextDeadline(currentDeadline *dline.Info) *dline.Info {
 	newDeadline := currentDeadline.Index + 1
 	if newDeadline == miner.WPoStPeriodDeadlines {
 		newDeadline = 0
-		periodStart = periodStart + miner.WPoStProvingPeriod
+		periodStart = periodStart + miner.WPoStProvingPeriod()
 	}
 
 	return NewDeadlineInfo(periodStart, newDeadline, currentDeadline.CurrentEpoch)
 }
 
 func NewDeadlineInfo(periodStart abi.ChainEpoch, deadlineIdx uint64, currEpoch abi.ChainEpoch) *dline.Info {
-	return dline.NewInfo(periodStart, deadlineIdx, currEpoch, miner.WPoStPeriodDeadlines, miner.WPoStProvingPeriod, miner.WPoStChallengeWindow, miner.WPoStChallengeLookback, miner.FaultDeclarationCutoff)
+	return dline.NewInfo(periodStart, deadlineIdx, currEpoch, miner.WPoStPeriodDeadlines, miner.WPoStProvingPeriod(), miner.WPoStChallengeWindow(), miner.WPoStChallengeLookback, miner.FaultDeclarationCutoff)
 }
diff --git a/storage/wdpost/wdpost_journal.go b/storage/wdpost/wdpost_journal.go
index 406628f68..68cad3fcf 100644
--- a/storage/wdpost/wdpost_journal.go
+++ b/storage/wdpost/wdpost_journal.go
@@ -4,8 +4,9 @@ import (
 	"github.com/ipfs/go-cid"
 
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/dline"
+
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 )
 
 // SchedulerState defines the possible states in which the scheduler could be,
diff --git a/storage/wdpost/wdpost_run.go b/storage/wdpost/wdpost_run.go
index 8871d832d..e8a59f629 100644
--- a/storage/wdpost/wdpost_run.go
+++ b/storage/wdpost/wdpost_run.go
@@ -15,7 +15,6 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
 	"github.com/filecoin-project/go-state-types/network"
@@ -25,6 +24,7 @@ import (
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/actors"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/actors/policy"
 	"github.com/filecoin-project/lotus/chain/messagepool"
 	"github.com/filecoin-project/lotus/chain/types"
diff --git a/storage/wdpost/wdpost_run_faults.go b/storage/wdpost/wdpost_run_faults.go
index 582e61f9d..3a41cc4cc 100644
--- a/storage/wdpost/wdpost_run_faults.go
+++ b/storage/wdpost/wdpost_run_faults.go
@@ -14,12 +14,12 @@ import (
 	"github.com/filecoin-project/go-bitfield"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/builtin"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/dline"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/actors"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 )
 
diff --git a/storage/wdpost/wdpost_run_test.go b/storage/wdpost/wdpost_run_test.go
index bfc9ef9c1..a3847a6f6 100644
--- a/storage/wdpost/wdpost_run_test.go
+++ b/storage/wdpost/wdpost_run_test.go
@@ -298,7 +298,7 @@ func TestWDPostDoPostPartLimitConfig(t *testing.T) {
 	//stm: @CHAIN_SYNCER_COLLECT_CHAIN_001, @CHAIN_SYNCER_COLLECT_HEADERS_001, @CHAIN_SYNCER_VALIDATE_TIPSET_001
 	//stm: @CHAIN_SYNCER_NEW_PEER_HEAD_001, @CHAIN_SYNCER_VALIDATE_MESSAGE_META_001, @CHAIN_SYNCER_STOP_001
 	ctx := context.Background()
-	expectedMsgCount := 364
+	expectedMsgCount := 8
 
 	proofType := abi.RegisteredPoStProof_StackedDrgWindow2KiBV1
 	postAct := tutils.NewIDAddr(t, 100)
@@ -318,15 +318,15 @@ func TestWDPostDoPostPartLimitConfig(t *testing.T) {
 		partitionsPerMsg = minertypes.AddressedPartitionsMax
 	}
 
-	partitionCount := 4 * partitionsPerMsg
+	partitionCount := 5 * partitionsPerMsg
 
 	// Assert that user config is less than network limit
-	userPartLimit := 33
-	lastMsgParts := 21
-	require.Greater(t, partitionCount, userPartLimit)
+	userPartLimit := 2
+	lastMsgParts := 1
+	require.Greater(t, partitionsPerMsg, userPartLimit)
 
 	// Assert that we consts are correct
-	require.Equal(t, (expectedMsgCount-1)*userPartLimit+lastMsgParts, 4*partitionsPerMsg)
+	require.Equal(t, (expectedMsgCount-1)*userPartLimit+lastMsgParts, partitionCount)
 
 	var partitions []api.Partition
 	for p := 0; p < partitionCount; p++ {
@@ -398,7 +398,7 @@ func TestBatchPartitionsRecoverySectors(t *testing.T) {
 
 	mockStgMinerAPI := newMockStorageMinerAPI()
 
-	userPartLimit := 4
+	userPartLimit := 2
 
 	scheduler := &WindowPoStScheduler{
 		api:          mockStgMinerAPI,
@@ -426,12 +426,12 @@ func TestBatchPartitionsRecoverySectors(t *testing.T) {
 	}
 	partitions = append(partitions, generatePartition(100, 10))
 
-	expectedBatchLens := []int{4, 1, 1, 4, 2, 1}
+	expectedBatchLens := []int{2, 2, 1, 1, 2, 2, 2, 1}
 
-	batches, err := scheduler.BatchPartitions(partitions, network.Version16)
+	batches, err := scheduler.BatchPartitions(partitions, network.Version21)
 	require.NoError(t, err)
 
-	require.Equal(t, len(batches), 6)
+	require.Equal(t, len(batches), len(expectedBatchLens))
 
 	for i, batch := range batches {
 		require.Equal(t, len(batch), expectedBatchLens[i])
diff --git a/storage/wdpost/wdpost_sched.go b/storage/wdpost/wdpost_sched.go
index 059b1bf0c..aaa7361b4 100644
--- a/storage/wdpost/wdpost_sched.go
+++ b/storage/wdpost/wdpost_sched.go
@@ -12,14 +12,13 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-bitfield"
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/go-state-types/builtin/v9/miner"
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
 	"github.com/filecoin-project/go-state-types/network"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
-	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/store"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/journal"
@@ -45,7 +44,7 @@ type NodeAPI interface {
 	StateMinerPartitions(context.Context, address.Address, uint64, types.TipSetKey) ([]api.Partition, error)
 	StateLookupID(context.Context, address.Address, types.TipSetKey) (address.Address, error)
 	StateAccountKey(context.Context, address.Address, types.TipSetKey) (address.Address, error)
-	StateSectorPartition(ctx context.Context, maddr address.Address, sectorNumber abi.SectorNumber, tok types.TipSetKey) (*lminer.SectorLocation, error)
+	StateSectorPartition(ctx context.Context, maddr address.Address, sectorNumber abi.SectorNumber, tok types.TipSetKey) (*miner.SectorLocation, error)
 
 	MpoolPushMessage(context.Context, *types.Message, *api.MessageSendSpec) (*types.SignedMessage, error)