diff --git a/build/bootstrap/bootstrappers.pi b/build/bootstrap/bootstrappers.pi
index 465f3b5e9..d8756c95c 100644
--- a/build/bootstrap/bootstrappers.pi
+++ b/build/bootstrap/bootstrappers.pi
@@ -4,3 +4,7 @@
 /dns4/bootstrap-4.testnet.fildev.network/tcp/1347/p2p/12D3KooWPkL9LrKRQgHtq7kn9ecNhGU9QaziG8R5tX8v9v7t3h34
 /dns4/bootstrap-3.testnet.fildev.network/tcp/1347/p2p/12D3KooWKYSsbpgZ3HAjax5M1BXCwXLa6gVkUARciz7uN3FNtr7T
 /dns4/bootstrap-5.testnet.fildev.network/tcp/1347/p2p/12D3KooWQYzqnLASJAabyMpPb1GcWZvNSe7JDcRuhdRqonFoiK9W
+/dns4/lotus-bootstrap.forceup.cn/tcp/41778/p2p/12D3KooWFQsv3nRMUevZNWWsY1Wu6NUzUbawnWU5NcRhgKuJA37C
+/dns4/bootstrap-0.starpool.in/tcp/12757/p2p/12D3KooWGHpBMeZbestVEWkfdnC9u7p6uFHXL1n7m1ZBqsEmiUzz
+/dns4/bootstrap-1.starpool.in/tcp/12757/p2p/12D3KooWQZrGH1PxSNZPum99M1zNvjNFM33d1AAu5DcvdHptuU7u
+/dns4/node.glif.io/tcp/1235/p2p/12D3KooWBF8cpp65hp2u9LK5mh19x67ftAam84z9LsfaquTDSBpt
diff --git a/build/params_shared_funcs.go b/build/params_shared_funcs.go
index 0e9739914..28567d3d1 100644
--- a/build/params_shared_funcs.go
+++ b/build/params_shared_funcs.go
@@ -3,6 +3,8 @@ package build
 import (
 	"sort"
 
+	"github.com/filecoin-project/go-address"
+
 	"github.com/libp2p/go-libp2p-core/protocol"
 
 	"github.com/filecoin-project/go-state-types/abi"
@@ -44,3 +46,7 @@ func UseNewestNetwork() bool {
 	}
 	return false
 }
+
+func SetAddressNetwork(n address.Network) {
+	address.CurrentNetwork = n
+}
diff --git a/build/params_shared_vals.go b/build/params_shared_vals.go
index 95c347281..33828f954 100644
--- a/build/params_shared_vals.go
+++ b/build/params_shared_vals.go
@@ -4,6 +4,9 @@ package build
 
 import (
 	"math/big"
+	"os"
+
+	"github.com/filecoin-project/go-address"
 
 	"github.com/filecoin-project/go-state-types/network"
 
@@ -60,6 +63,11 @@ const TicketRandomnessLookback = abi.ChainEpoch(1)
 
 const WinningPoStSectorSetLookback = abi.ChainEpoch(10)
 
+// /////
+// Address
+
+const AddressMainnetEnvVar = "_mainnet_"
+
 // /////
 // Devnet settings
 
@@ -77,6 +85,10 @@ var InitialRewardBalance *big.Int
 func init() {
 	InitialRewardBalance = big.NewInt(int64(FilAllocStorageMining))
 	InitialRewardBalance = InitialRewardBalance.Mul(InitialRewardBalance, big.NewInt(int64(FilecoinPrecision)))
+
+	if os.Getenv("LOTUS_ADDRESS_TYPE") == AddressMainnetEnvVar {
+		SetAddressNetwork(address.Mainnet)
+	}
 }
 
 // Sync
diff --git a/chain/store/store.go b/chain/store/store.go
index fce8a650f..1dbf69547 100644
--- a/chain/store/store.go
+++ b/chain/store/store.go
@@ -15,9 +15,11 @@ import (
 
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/specs-actors/actors/builtin"
 	"github.com/filecoin-project/specs-actors/actors/util/adt"
 
 	"github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/vm"
 	"github.com/filecoin-project/lotus/journal"
 	bstore "github.com/filecoin-project/lotus/lib/blockstore"
@@ -1183,6 +1185,7 @@ func (cs *ChainStore) Export(ctx context.Context, ts *types.TipSet, inclRecentRo
 	}
 
 	blocksToWalk := ts.Cids()
+	currentMinHeight := ts.Height()
 
 	walkChain := func(blk cid.Cid) error {
 		if !seen.Visit(blk) {
@@ -1203,6 +1206,13 @@ func (cs *ChainStore) Export(ctx context.Context, ts *types.TipSet, inclRecentRo
 			return xerrors.Errorf("unmarshaling block header (cid=%s): %w", blk, err)
 		}
 
+		if currentMinHeight > b.Height {
+			currentMinHeight = b.Height
+			if currentMinHeight%builtin.EpochsInDay == 0 {
+				log.Infow("export", "height", currentMinHeight)
+			}
+		}
+
 		var cids []cid.Cid
 		if !skipOldMsgs || b.Height > ts.Height()-inclRecentRoots {
 			mcids, err := recurseLinks(cs.bs, walked, b.Messages, []cid.Cid{b.Messages})
@@ -1251,6 +1261,9 @@ func (cs *ChainStore) Export(ctx context.Context, ts *types.TipSet, inclRecentRo
 		return nil
 	}
 
+	log.Infow("export started")
+	exportStart := build.Clock.Now()
+
 	for len(blocksToWalk) > 0 {
 		next := blocksToWalk[0]
 		blocksToWalk = blocksToWalk[1:]
@@ -1259,6 +1272,8 @@ func (cs *ChainStore) Export(ctx context.Context, ts *types.TipSet, inclRecentRo
 		}
 	}
 
+	log.Infow("export finished", "duration", build.Clock.Now().Sub(exportStart).Seconds())
+
 	return nil
 }
 
diff --git a/chain/types_test.go b/chain/types_test.go
index 7d68da68d..b47471c9d 100644
--- a/chain/types_test.go
+++ b/chain/types_test.go
@@ -1,9 +1,12 @@
 package chain
 
 import (
+	"crypto/rand"
 	"encoding/json"
 	"testing"
 
+	"github.com/filecoin-project/lotus/build"
+
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/lotus/chain/types"
 )
@@ -35,3 +38,40 @@ func TestSignedMessageJsonRoundtrip(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func TestAddressType(t *testing.T) {
+	build.SetAddressNetwork(address.Testnet)
+	addr, err := makeRandomAddress()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if string(addr[0]) != address.TestnetPrefix {
+		t.Fatalf("address should start with %s", address.TestnetPrefix)
+	}
+
+	build.SetAddressNetwork(address.Mainnet)
+	addr, err = makeRandomAddress()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if string(addr[0]) != address.MainnetPrefix {
+		t.Fatalf("address should start with %s", address.MainnetPrefix)
+	}
+}
+
+func makeRandomAddress() (string, error) {
+	bytes := make([]byte, 32)
+	_, err := rand.Read(bytes)
+	if err != nil {
+		return "", err
+	}
+
+	addr, err := address.NewActorAddress(bytes)
+	if err != nil {
+		return "", err
+	}
+
+	return addr.String(), nil
+}
diff --git a/cli/state.go b/cli/state.go
index b25a5e4a7..7baf57df2 100644
--- a/cli/state.go
+++ b/cli/state.go
@@ -821,6 +821,10 @@ var stateComputeStateCmd = &cli.Command{
 			Name:  "html",
 			Usage: "generate html report",
 		},
+		&cli.BoolFlag{
+			Name:  "json",
+			Usage: "generate json output",
+		},
 	},
 	Action: func(cctx *cli.Context) error {
 		api, closer, err := GetFullNodeAPI(cctx)
@@ -865,6 +869,15 @@ var stateComputeStateCmd = &cli.Command{
 			return err
 		}
 
+		if cctx.Bool("json") {
+			out, err := json.Marshal(stout)
+			if err != nil {
+				return err
+			}
+			fmt.Println(string(out))
+			return nil
+		}
+
 		if cctx.Bool("html") {
 			st, err := state.LoadStateTree(cbor.NewCborStore(apibstore.NewAPIBlockstore(api)), stout.Root)
 			if err != nil {
diff --git a/cmd/lotus-bench/main.go b/cmd/lotus-bench/main.go
index 2516bfd26..e409dfe5a 100644
--- a/cmd/lotus-bench/main.go
+++ b/cmd/lotus-bench/main.go
@@ -76,8 +76,6 @@ func main() {
 
 	log.Info("Starting lotus-bench")
 
-	policy.AddSupportedProofTypes(abi.RegisteredSealProof_StackedDrg2KiBV1)
-
 	app := &cli.App{
 		Name:    "lotus-bench",
 		Usage:   "Benchmark performance of lotus on your hardware",
@@ -147,6 +145,8 @@ var sealBenchCmd = &cli.Command{
 		},
 	},
 	Action: func(c *cli.Context) error {
+		policy.AddSupportedProofTypes(abi.RegisteredSealProof_StackedDrg2KiBV1)
+
 		if c.Bool("no-gpu") {
 			err := os.Setenv("BELLMAN_NO_GPU", "1")
 			if err != nil {
diff --git a/extern/fil-blst b/extern/fil-blst
index 5f93488fc..8609119cf 160000
--- a/extern/fil-blst
+++ b/extern/fil-blst
@@ -1 +1 @@
-Subproject commit 5f93488fc0dbfb450f2355269f18fc67010d59bb
+Subproject commit 8609119cf4595d1741139c24378fcd8bc4f1c475
diff --git a/extern/filecoin-ffi b/extern/filecoin-ffi
index f640612a1..57e38efe4 160000
--- a/extern/filecoin-ffi
+++ b/extern/filecoin-ffi
@@ -1 +1 @@
-Subproject commit f640612a1a1f7a2dd8b3a49e1531db0aa0f63447
+Subproject commit 57e38efe4943f09d3127dcf6f0edd614e6acf68e
diff --git a/go.mod b/go.mod
index b0de7dfd6..67d87347f 100644
--- a/go.mod
+++ b/go.mod
@@ -21,7 +21,7 @@ require (
 	github.com/elastic/go-sysinfo v1.3.0
 	github.com/fatih/color v1.8.0
 	github.com/filecoin-project/filecoin-ffi v0.30.4-0.20200716204036-cddc56607e1d
-	github.com/filecoin-project/go-address v0.0.3
+	github.com/filecoin-project/go-address v0.0.4
 	github.com/filecoin-project/go-bitfield v0.2.0
 	github.com/filecoin-project/go-cbor-util v0.0.0-20191219014500-08c40a1e63a2
 	github.com/filecoin-project/go-crypto v0.0.0-20191218222705-effae4ea9f03
diff --git a/go.sum b/go.sum
index 6412fe743..05e643708 100644
--- a/go.sum
+++ b/go.sum
@@ -214,6 +214,8 @@ github.com/fatih/color v1.8.0/go.mod h1:3l45GVGkyrnYNl9HoIjnp2NnNWvh6hLAqD8yTfGj
 github.com/fd/go-nat v1.0.0/go.mod h1:BTBu/CKvMmOMUPkKVef1pngt2WFH/lg7E6yQnulfp6E=
 github.com/filecoin-project/go-address v0.0.3 h1:eVfbdjEbpbzIrbiSa+PiGUY+oDK9HnUn+M1R/ggoHf8=
 github.com/filecoin-project/go-address v0.0.3/go.mod h1:jr8JxKsYx+lQlQZmF5i2U0Z+cGQ59wMIps/8YW/lDj8=
+github.com/filecoin-project/go-address v0.0.4 h1:gSNMv0qWwH16fGQs7ycOUrDjY6YCSsgLUl0I0KLjo8w=
+github.com/filecoin-project/go-address v0.0.4/go.mod h1:jr8JxKsYx+lQlQZmF5i2U0Z+cGQ59wMIps/8YW/lDj8=
 github.com/filecoin-project/go-amt-ipld/v2 v2.1.0 h1:t6qDiuGYYngDqaLc2ZUvdtAg4UNxPeOYaXhBWSNsVaM=
 github.com/filecoin-project/go-amt-ipld/v2 v2.1.0/go.mod h1:nfFPoGyX0CU9SkXX8EoCcSuHN1XcbN0c6KBh7yvP5fs=
 github.com/filecoin-project/go-bitfield v0.2.0 h1:gCtLcjskIPtdg4NfN7gQZSQF9yrBQ7mkT0qCJxzGI2Q=