diff --git a/.circleci/config.yml b/.circleci/config.yml
index b35d2ceb4..3b8c78592 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -8,7 +8,6 @@ commands:
     steps:
       - go/install-ssh
       - go/install: {package: git}
-      - go/install: {package: bzr}
   prepare:
     steps:
       - checkout
diff --git a/api/api.go b/api/api.go
index ff6017571..d2c2ad424 100644
--- a/api/api.go
+++ b/api/api.go
@@ -26,6 +26,11 @@ type Import struct {
 	Size     uint64
 }
 
+type MsgWait struct {
+	InBlock cid.Cid
+	Receipt types.MessageReceipt
+}
+
 // API is a low-level interface to the Filecoin network
 type API interface {
 	// chain
@@ -33,6 +38,7 @@ type API interface {
 	ChainHead(context.Context) (*chain.TipSet, error)                // TODO: check serialization
 	ChainSubmitBlock(ctx context.Context, blk *chain.BlockMsg) error // TODO: check serialization
 	ChainGetRandomness(context.Context, *chain.TipSet) ([]byte, error)
+	ChainWaitMsg(context.Context, cid.Cid) (*MsgWait, error)
 
 	// messages
 
@@ -42,6 +48,7 @@ type API interface {
 	// // mpool
 	// // // ls / show / rm
 	MpoolPending(context.Context, *chain.TipSet) ([]*chain.SignedMessage, error)
+	MpoolPush(context.Context, *chain.SignedMessage) error
 
 	// dag
 
@@ -74,6 +81,12 @@ type API interface {
 	WalletNew(context.Context, string) (address.Address, error)
 	WalletList(context.Context) ([]address.Address, error)
 	WalletBalance(context.Context, address.Address) (types.BigInt, error)
+	WalletSign(context.Context, address.Address, []byte) (*chain.Signature, error)
+	WalletDefaultAddress(context.Context) (address.Address, error)
+
+	// Really not sure where this belongs. It could go on the wallet, or the message pool, or the chain...
+	MpoolGetNonce(context.Context, address.Address) (uint64, error)
+
 	// // import
 	// // export
 	// // (on cli - cmd to list associations)
diff --git a/api/struct.go b/api/struct.go
index 8a44f193d..7783bcabc 100644
--- a/api/struct.go
+++ b/api/struct.go
@@ -20,15 +20,20 @@ type Struct struct {
 		ChainSubmitBlock   func(ctx context.Context, blk *chain.BlockMsg) error
 		ChainHead          func(context.Context) (*chain.TipSet, error)
 		ChainGetRandomness func(context.Context, *chain.TipSet) ([]byte, error)
+		ChainWaitMsg       func(context.Context, cid.Cid) (*MsgWait, error)
 
 		MpoolPending func(context.Context, *chain.TipSet) ([]*chain.SignedMessage, error)
+		MpoolPush    func(context.Context, *chain.SignedMessage) error
 
 		MinerStart       func(context.Context, address.Address) error
 		MinerCreateBlock func(context.Context, address.Address, *chain.TipSet, []chain.Ticket, chain.ElectionProof, []*chain.SignedMessage) (*chain.BlockMsg, error)
 
-		WalletNew     func(context.Context, string) (address.Address, error)
-		WalletList    func(context.Context) ([]address.Address, error)
-		WalletBalance func(context.Context, address.Address) (types.BigInt, error)
+		WalletNew            func(context.Context, string) (address.Address, error)
+		WalletList           func(context.Context) ([]address.Address, error)
+		WalletBalance        func(context.Context, address.Address) (types.BigInt, error)
+		WalletSign           func(context.Context, address.Address, []byte) (*chain.Signature, error)
+		WalletDefaultAddress func(context.Context) (address.Address, error)
+		MpoolGetNonce        func(context.Context, address.Address) (uint64, error)
 
 		ClientImport      func(ctx context.Context, path string) (cid.Cid, error)
 		ClientListImports func(ctx context.Context) ([]Import, error)
@@ -51,6 +56,10 @@ func (c *Struct) MpoolPending(ctx context.Context, ts *chain.TipSet) ([]*chain.S
 	return c.Internal.MpoolPending(ctx, ts)
 }
 
+func (c *Struct) MpoolPush(ctx context.Context, smsg *chain.SignedMessage) error {
+	return c.Internal.MpoolPush(ctx, smsg)
+}
+
 func (c *Struct) MinerStart(ctx context.Context, addr address.Address) error {
 	return c.Internal.MinerStart(ctx, addr)
 }
@@ -83,6 +92,10 @@ func (c *Struct) ChainGetRandomness(ctx context.Context, pts *chain.TipSet) ([]b
 	return c.Internal.ChainGetRandomness(ctx, pts)
 }
 
+func (c *Struct) ChainWaitMsg(ctx context.Context, msgc cid.Cid) (*MsgWait, error) {
+	return c.Internal.ChainWaitMsg(ctx, msgc)
+}
+
 // ID implements API.ID
 func (c *Struct) ID(ctx context.Context) (peer.ID, error) {
 	return c.Internal.ID(ctx)
@@ -105,4 +118,16 @@ func (c *Struct) WalletBalance(ctx context.Context, a address.Address) (types.Bi
 	return c.Internal.WalletBalance(ctx, a)
 }
 
+func (c *Struct) WalletSign(ctx context.Context, k address.Address, msg []byte) (*chain.Signature, error) {
+	return c.Internal.WalletSign(ctx, k, msg)
+}
+
+func (c *Struct) WalletDefaultAddress(ctx context.Context) (address.Address, error) {
+	return c.Internal.WalletDefaultAddress(ctx)
+}
+
+func (c *Struct) MpoolGetNonce(ctx context.Context, addr address.Address) (uint64, error) {
+	return c.Internal.MpoolGetNonce(ctx, addr)
+}
+
 var _ API = &Struct{}
diff --git a/chain/chain.go b/chain/chain.go
index a971b0e4d..9c2e5f200 100644
--- a/chain/chain.go
+++ b/chain/chain.go
@@ -2,6 +2,7 @@ package chain
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"sync"
 
@@ -220,7 +221,7 @@ type ChainStore struct {
 
 	bestTips *pubsub.PubSub
 
-	headChange func(rev, app []*TipSet) error
+	headChangeNotifs []func(rev, app []*TipSet) error
 }
 
 func NewChainStore(bs bstore.Blockstore, ds dstore.Batching) *ChainStore {
@@ -231,8 +232,42 @@ func NewChainStore(bs bstore.Blockstore, ds dstore.Batching) *ChainStore {
 	}
 }
 
-func (cs *ChainStore) SubNewTips() chan interface{} {
-	return cs.bestTips.Sub("best")
+func (cs *ChainStore) SubNewTips() chan *TipSet {
+	subch := cs.bestTips.Sub("best")
+	out := make(chan *TipSet)
+	go func() {
+		defer close(out)
+		for val := range subch {
+			out <- val.(*TipSet)
+		}
+	}()
+	return out
+}
+
+const (
+	HCRevert = "revert"
+	HCApply  = "apply"
+)
+
+type HeadChange struct {
+	Type string
+	Val  *TipSet
+}
+
+func (cs *ChainStore) SubHeadChanges() chan *HeadChange {
+	subch := cs.bestTips.Sub("headchange")
+	out := make(chan *HeadChange, 16)
+	go func() {
+		defer close(out)
+		for val := range subch {
+			out <- val.(*HeadChange)
+		}
+	}()
+	return out
+}
+
+func (cs *ChainStore) SubscribeHeadChanges(f func(rev, app []*TipSet) error) {
+	cs.headChangeNotifs = append(cs.headChangeNotifs, f)
 }
 
 func (cs *ChainStore) SetGenesis(b *BlockHeader) error {
@@ -275,7 +310,9 @@ func (cs *ChainStore) maybeTakeHeavierTipSet(ts *TipSet) error {
 		if err != nil {
 			return err
 		}
-		cs.headChange(revert, apply)
+		for _, hcf := range cs.headChangeNotifs {
+			hcf(revert, apply)
+		}
 		log.Infof("New heaviest tipset! %s", ts.Cids())
 		cs.heaviest = ts
 	}
@@ -470,7 +507,7 @@ func (cs *ChainStore) GetMessage(c cid.Cid) (*SignedMessage, error) {
 	return DecodeSignedMessage(sb.RawData())
 }
 
-func (cs *ChainStore) MessagesForBlock(b *BlockHeader) ([]*SignedMessage, error) {
+func (cs *ChainStore) MessageCidsForBlock(b *BlockHeader) ([]cid.Cid, error) {
 	cst := hamt.CSTFromBstore(cs.bs)
 	shar, err := sharray.Load(context.TODO(), b.Messages, 4, cst)
 	if err != nil {
@@ -491,9 +528,43 @@ func (cs *ChainStore) MessagesForBlock(b *BlockHeader) ([]*SignedMessage, error)
 		return nil, err
 	}
 
+	return cids, nil
+}
+
+func (cs *ChainStore) MessagesForBlock(b *BlockHeader) ([]*SignedMessage, error) {
+	cids, err := cs.MessageCidsForBlock(b)
+	if err != nil {
+		return nil, err
+	}
+
 	return cs.LoadMessagesFromCids(cids)
 }
 
+func (cs *ChainStore) GetReceipt(b *BlockHeader, i int) (*types.MessageReceipt, error) {
+	cst := hamt.CSTFromBstore(cs.bs)
+	shar, err := sharray.Load(context.TODO(), b.MessageReceipts, 4, cst)
+	if err != nil {
+		return nil, errors.Wrap(err, "sharray load")
+	}
+
+	ival, err := shar.Get(context.TODO(), i)
+	if err != nil {
+		return nil, err
+	}
+
+	// @warpfork, @EricMyhre help me. save me.
+	out, err := json.Marshal(ival)
+	if err != nil {
+		return nil, err
+	}
+	var r types.MessageReceipt
+	if err := json.Unmarshal(out, &r); err != nil {
+		return nil, err
+	}
+
+	return &r, nil
+}
+
 func (cs *ChainStore) LoadMessagesFromCids(cids []cid.Cid) ([]*SignedMessage, error) {
 	msgs := make([]*SignedMessage, 0, len(cids))
 	for _, c := range cids {
@@ -528,3 +599,66 @@ func (cs *ChainStore) GetBalance(addr address.Address) (types.BigInt, error) {
 
 	return act.Balance, nil
 }
+
+func (cs *ChainStore) WaitForMessage(ctx context.Context, mcid cid.Cid) (cid.Cid, *types.MessageReceipt, error) {
+	tsub := cs.SubHeadChanges()
+
+	head := cs.GetHeaviestTipSet()
+
+	bc, r, err := cs.tipsetContainsMsg(head, mcid)
+	if err != nil {
+		return cid.Undef, nil, err
+	}
+
+	if r != nil {
+		return bc, r, nil
+	}
+
+	for {
+		select {
+		case val := <-tsub:
+			switch val.Type {
+			case HCRevert:
+				continue
+			case HCApply:
+				bc, r, err := cs.tipsetContainsMsg(val.Val, mcid)
+				if err != nil {
+					return cid.Undef, nil, err
+				}
+				if r != nil {
+					return bc, r, nil
+				}
+			}
+		case <-ctx.Done():
+			return cid.Undef, nil, ctx.Err()
+		}
+	}
+}
+
+func (cs *ChainStore) tipsetContainsMsg(ts *TipSet, msg cid.Cid) (cid.Cid, *types.MessageReceipt, error) {
+	for _, b := range ts.Blocks() {
+		r, err := cs.blockContainsMsg(b, msg)
+		if err != nil {
+			return cid.Undef, nil, err
+		}
+		if r != nil {
+			return b.Cid(), r, nil
+		}
+	}
+	return cid.Undef, nil, nil
+}
+
+func (cs *ChainStore) blockContainsMsg(blk *BlockHeader, msg cid.Cid) (*types.MessageReceipt, error) {
+	msgs, err := cs.MessageCidsForBlock(blk)
+	if err != nil {
+		return nil, err
+	}
+
+	for i, mc := range msgs {
+		if mc == msg {
+			return cs.GetReceipt(blk, i)
+		}
+	}
+
+	return nil, nil
+}
diff --git a/chain/messagepool.go b/chain/messagepool.go
index 19d3154e6..84af33e41 100644
--- a/chain/messagepool.go
+++ b/chain/messagepool.go
@@ -4,6 +4,7 @@ import (
 	"sync"
 
 	"github.com/filecoin-project/go-lotus/chain/address"
+	hamt "github.com/ipfs/go-hamt-ipld"
 )
 
 type MessagePool struct {
@@ -37,7 +38,7 @@ func NewMessagePool(cs *ChainStore) *MessagePool {
 		pending: make(map[address.Address]*msgSet),
 		cs:      cs,
 	}
-	cs.headChange = mp.HeadChange
+	cs.SubscribeHeadChanges(mp.HeadChange)
 
 	return mp
 }
@@ -74,6 +75,36 @@ func (mp *MessagePool) Add(m *SignedMessage) error {
 	return nil
 }
 
+func (mp *MessagePool) GetNonce(addr address.Address) (uint64, error) {
+	mp.lk.Lock()
+	defer mp.lk.Unlock()
+
+	mset, ok := mp.pending[addr]
+	if ok {
+		return mset.startNonce + uint64(len(mset.msgs)), nil
+	}
+
+	head := mp.cs.GetHeaviestTipSet()
+
+	state, err := mp.cs.TipSetState(head.Cids())
+	if err != nil {
+		return 0, err
+	}
+
+	cst := hamt.CSTFromBstore(mp.cs.bs)
+	st, err := LoadStateTree(cst, state)
+	if err != nil {
+		return 0, err
+	}
+
+	act, err := st.GetActor(addr)
+	if err != nil {
+		return 0, err
+	}
+
+	return act.Nonce, nil
+}
+
 func (mp *MessagePool) Remove(m *SignedMessage) {
 	mp.lk.Lock()
 	defer mp.lk.Unlock()
diff --git a/chain/types/bigint.go b/chain/types/bigint.go
index ae2efc470..5e5b54dc5 100644
--- a/chain/types/bigint.go
+++ b/chain/types/bigint.go
@@ -71,6 +71,9 @@ func (bi *BigInt) UnmarshalJSON(b []byte) error {
 
 	i, ok := big.NewInt(0).SetString(s, 10)
 	if !ok {
+		if string(s) == "<nil>" {
+			return nil
+		}
 		return fmt.Errorf("failed to parse bigint string")
 	}
 
diff --git a/chain/types_test.go b/chain/types_test.go
new file mode 100644
index 000000000..99bbb8212
--- /dev/null
+++ b/chain/types_test.go
@@ -0,0 +1,36 @@
+package chain
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/filecoin-project/go-lotus/chain/address"
+	"github.com/filecoin-project/go-lotus/chain/types"
+)
+
+func TestSignedMessageJsonRoundtrip(t *testing.T) {
+	to, _ := address.NewIDAddress(5234623)
+	from, _ := address.NewIDAddress(603911192)
+	smsg := &SignedMessage{
+		Message: types.Message{
+			To:       to,
+			From:     from,
+			Params:   []byte("some bytes, idk"),
+			Method:   1235126,
+			Value:    types.NewInt(123123),
+			GasPrice: types.NewInt(1234),
+			GasLimit: types.NewInt(9992969384),
+			Nonce:    123123,
+		},
+	}
+
+	out, err := json.Marshal(smsg)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var osmsg SignedMessage
+	if err := json.Unmarshal(out, &osmsg); err != nil {
+		t.Fatal(err)
+	}
+}
diff --git a/cli/cmd.go b/cli/cmd.go
index eae207d06..ddba0a542 100644
--- a/cli/cmd.go
+++ b/cli/cmd.go
@@ -66,4 +66,5 @@ var Commands = []*cli.Command{
 	mpoolCmd,
 	minerCmd,
 	walletCmd,
+	createMinerCmd,
 }
diff --git a/cli/createminer.go b/cli/createminer.go
new file mode 100644
index 000000000..f22931627
--- /dev/null
+++ b/cli/createminer.go
@@ -0,0 +1,121 @@
+package cli
+
+import (
+	"fmt"
+	"strconv"
+
+	"golang.org/x/xerrors"
+	"gopkg.in/urfave/cli.v2"
+
+	"github.com/filecoin-project/go-lotus/chain"
+	actors "github.com/filecoin-project/go-lotus/chain/actors"
+	address "github.com/filecoin-project/go-lotus/chain/address"
+	types "github.com/filecoin-project/go-lotus/chain/types"
+
+	"github.com/libp2p/go-libp2p-core/peer"
+)
+
+var createMinerCmd = &cli.Command{
+	Name:  "createminer",
+	Usage: "Create a new storage market actor",
+	Action: func(cctx *cli.Context) error {
+		if cctx.Args().Len() != 4 {
+			return fmt.Errorf("must pass four arguments: worker address, owner address, sector size, peer ID")
+		}
+
+		api, err := getAPI(cctx)
+		if err != nil {
+			return err
+		}
+
+		args := cctx.Args().Slice()
+
+		worker, err := address.NewFromString(args[0])
+		if err != nil {
+			return err
+		}
+
+		owner, err := address.NewFromString(args[1])
+		if err != nil {
+			return err
+		}
+
+		ssize, err := strconv.ParseUint(args[2], 10, 64)
+		if err != nil {
+			return err
+		}
+
+		pid, err := peer.IDB58Decode(args[3])
+		if err != nil {
+			return err
+		}
+
+		createMinerArgs := actors.CreateStorageMinerParams{
+			Worker:     worker,
+			Owner:      owner,
+			SectorSize: types.NewInt(ssize),
+			PeerID:     pid,
+		}
+
+		ctx := reqContext(cctx)
+		addr, err := api.WalletDefaultAddress(ctx)
+		if err != nil {
+			return xerrors.Errorf("failed to get default address: %w", err)
+		}
+
+		params, err := actors.SerializeParams(createMinerArgs)
+		if err != nil {
+			return err
+		}
+
+		nonce, err := api.MpoolGetNonce(ctx, addr)
+		if err != nil {
+			return xerrors.Errorf("failed to get account nonce: %w", err)
+		}
+
+		msg := types.Message{
+			To:       actors.StorageMarketAddress,
+			From:     addr,
+			Method:   1, // TODO: constants pls
+			Params:   params,
+			Value:    types.NewInt(0),
+			Nonce:    nonce,
+			GasPrice: types.NewInt(1),
+			GasLimit: types.NewInt(1),
+		}
+
+		msgbytes, err := msg.Serialize()
+		if err != nil {
+			return err
+		}
+
+		sig, err := api.WalletSign(ctx, addr, msgbytes)
+		if err != nil {
+			return xerrors.Errorf("failed to sign message: %w", err)
+		}
+
+		smsg := &chain.SignedMessage{
+			Message:   msg,
+			Signature: *sig,
+		}
+
+		if err := api.MpoolPush(ctx, smsg); err != nil {
+			return xerrors.Errorf("failed to push signed message: %w", err)
+		}
+
+		mwait, err := api.ChainWaitMsg(ctx, smsg.Cid())
+		if err != nil {
+			return xerrors.Errorf("failed waiting for message inclusion: %w", err)
+		}
+
+		maddr, err := address.NewFromBytes(mwait.Receipt.Return)
+		if err != nil {
+			return err
+		}
+
+		fmt.Printf("miner created in block %s\n", mwait.InBlock)
+		fmt.Printf("new miner address: %s\n", maddr)
+
+		return nil
+	},
+}
diff --git a/go.mod b/go.mod
index 451de0c25..052eacd27 100644
--- a/go.mod
+++ b/go.mod
@@ -59,7 +59,7 @@ require (
 	github.com/stretchr/testify v1.3.0
 	github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7
 	github.com/whyrusleeping/pubsub v0.0.0-20131020042734-02de8aa2db3d
-	github.com/whyrusleeping/sharray v0.0.0-20190520213710-bd32aab369f8
+	github.com/whyrusleeping/sharray v0.0.0-20190718051354-e41931821e33
 	go.opencensus.io v0.22.0 // indirect
 	go.uber.org/dig v1.7.0 // indirect
 	go.uber.org/fx v1.9.0
diff --git a/go.sum b/go.sum
index e7a0cdfd0..a6aa7f2a8 100644
--- a/go.sum
+++ b/go.sum
@@ -418,8 +418,8 @@ github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7 h1:
 github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7/go.mod h1:X2c0RVCI1eSUFI8eLcY3c0423ykwiUdxLJtkDvruhjI=
 github.com/whyrusleeping/pubsub v0.0.0-20131020042734-02de8aa2db3d h1:wnjWu1N8UTNf2zzF5FWlEyNNbNw5GMVHaHaaLdvdTdA=
 github.com/whyrusleeping/pubsub v0.0.0-20131020042734-02de8aa2db3d/go.mod h1:g7ckxrjiFh8mi1AY7ox23PZD0g6QU/TxW3U3unX7I3A=
-github.com/whyrusleeping/sharray v0.0.0-20190520213710-bd32aab369f8 h1:n89ErB+0d4SBbyD8ykr7Q/j+C41ysUttZG3l9/2ufC4=
-github.com/whyrusleeping/sharray v0.0.0-20190520213710-bd32aab369f8/go.mod h1:c1pwhNePDPlcYJZinQlfLTOKwTmVf45nfdTg73yOOcA=
+github.com/whyrusleeping/sharray v0.0.0-20190718051354-e41931821e33 h1:7Bsg3GZnFAhdadeyRie9ReenkK2XbC2FlOpJQgTzpbA=
+github.com/whyrusleeping/sharray v0.0.0-20190718051354-e41931821e33/go.mod h1:c1pwhNePDPlcYJZinQlfLTOKwTmVf45nfdTg73yOOcA=
 github.com/whyrusleeping/timecache v0.0.0-20160911033111-cfcb2f1abfee h1:lYbXeSvJi5zk5GLKVuid9TVjS9a0OmLIDKTfoZBL6Ow=
 github.com/whyrusleeping/timecache v0.0.0-20160911033111-cfcb2f1abfee/go.mod h1:m2aV4LZI4Aez7dP5PMyVKEHhUyEJ/RjmPEDOpDvudHg=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
diff --git a/lib/jsonrpc/util.go b/lib/jsonrpc/util.go
index ece0af7de..03b0bf7bd 100644
--- a/lib/jsonrpc/util.go
+++ b/lib/jsonrpc/util.go
@@ -2,6 +2,7 @@ package jsonrpc
 
 import (
 	"encoding/json"
+	"fmt"
 	"reflect"
 )
 
@@ -42,7 +43,8 @@ func processFuncOut(funcType reflect.Type) (valOut int, errOut int, n int) {
 			panic("expected error as second return value")
 		}
 	default:
-		panic("too many error values")
+		errstr := fmt.Sprintf("too many return values: %s", funcType)
+		panic(errstr)
 	}
 
 	return
diff --git a/node/api.go b/node/api.go
index e2700fb8f..ee0954ee6 100644
--- a/node/api.go
+++ b/node/api.go
@@ -11,6 +11,7 @@ import (
 	"github.com/filecoin-project/go-lotus/miner"
 	"github.com/filecoin-project/go-lotus/node/client"
 
+	"github.com/ipfs/go-cid"
 	"github.com/libp2p/go-libp2p-core/host"
 	"github.com/libp2p/go-libp2p-core/peer"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
@@ -50,6 +51,10 @@ func (a *API) ChainGetRandomness(ctx context.Context, pts *chain.TipSet) ([]byte
 	return []byte("foo bar random"), nil
 }
 
+func (a *API) ChainWaitMsg(ctx context.Context, msg cid.Cid) (*api.MsgWait, error) {
+	panic("TODO")
+}
+
 func (a *API) ID(context.Context) (peer.ID, error) {
 	return a.Host.ID(), nil
 }
@@ -66,6 +71,19 @@ func (a *API) MpoolPending(ctx context.Context, ts *chain.TipSet) ([]*chain.Sign
 	return a.Mpool.Pending(), nil
 }
 
+func (a *API) MpoolPush(ctx context.Context, smsg *chain.SignedMessage) error {
+	msgb, err := smsg.Serialize()
+	if err != nil {
+		return err
+	}
+
+	return a.PubSub.Publish("/fil/messages", msgb)
+}
+
+func (a *API) MpoolGetNonce(ctx context.Context, addr address.Address) (uint64, error) {
+	return a.Mpool.GetNonce(addr)
+}
+
 func (a *API) MinerStart(ctx context.Context, addr address.Address) error {
 	// hrm...
 	m := miner.NewMiner(a, addr)
@@ -118,6 +136,20 @@ func (a *API) WalletBalance(ctx context.Context, addr address.Address) (types.Bi
 	return a.Chain.GetBalance(addr)
 }
 
+func (a *API) WalletSign(ctx context.Context, k address.Address, msg []byte) (*chain.Signature, error) {
+	return a.Wallet.Sign(k, msg)
+}
+
+func (a *API) WalletDefaultAddress(ctx context.Context) (address.Address, error) {
+	addrs, err := a.Wallet.ListAddrs()
+	if err != nil {
+		return address.Undef, err
+	}
+
+	// TODO: store a default address in the config or 'wallet' portion of the repo
+	return addrs[0], nil
+}
+
 func (a *API) NetConnect(ctx context.Context, p peer.AddrInfo) error {
 	return a.Host.Connect(ctx, p)
 }