implement key import and export

api/api.go

@@ -89,6 +89,8 @@ type FullNode interface {
 	WalletSign(context.Context, address.Address, []byte) (*types.Signature, error)
 	WalletSignMessage(context.Context, address.Address, *types.Message) (*types.SignedMessage, error)
 	WalletDefaultAddress(context.Context) (address.Address, error)
+	WalletExport(context.Context, address.Address) ([]byte, error)
+	WalletImport(context.Context, []byte) (address.Address, error)
 
 	// Other
 

api/struct.go

@@ -67,6 +67,9 @@ type FullNodeStruct struct {
 		WalletSign           func(context.Context, address.Address, []byte) (*types.Signature, error)             `perm:"sign"`
 		WalletSignMessage    func(context.Context, address.Address, *types.Message) (*types.SignedMessage, error) `perm:"sign"`
 		WalletDefaultAddress func(context.Context) (address.Address, error)                                       `perm:"write"`
+		WalletExport         func(context.Context, address.Address) ([]byte, error)                               `perm:"admin"`
+		WalletImport         func(context.Context, []byte) (address.Address, error)                               `perm:"admin"`
+
 		MpoolGetNonce func(context.Context, address.Address) (uint64, error) `perm:"read"`
 
 		ClientImport      func(ctx context.Context, path string) (cid.Cid, error)                                                                     `perm:"write"`
@@ -268,6 +271,14 @@ func (c *FullNodeStruct) WalletDefaultAddress(ctx context.Context) (address.Addr
 	return c.Internal.WalletDefaultAddress(ctx)
 }
 
+func (c *FullNodeStruct) WalletExport(ctx context.Context, a address.Address) ([]byte, error) {
+	return c.Internal.WalletExport(ctx, a)
+}
+
+func (c *FullNodeStruct) WalletImport(ctx context.Context, b []byte) (address.Address, error) {
+	return c.Internal.WalletImport(ctx, b)
+}
+
 func (c *FullNodeStruct) MpoolGetNonce(ctx context.Context, addr address.Address) (uint64, error) {
 	return c.Internal.MpoolGetNonce(ctx, addr)
 }

chain/wallet/wallet.go

@@ -2,8 +2,10 @@ package wallet
 
 import (
 	"context"
+	"encoding/json"
 	"sort"
 	"strings"
+	"sync"
 
 	"github.com/filecoin-project/go-bls-sigs"
 	"github.com/filecoin-project/go-lotus/node/repo"
@@ -23,6 +25,8 @@ const (
 type Wallet struct {
 	keys     map[address.Address]*Key
 	keystore types.KeyStore
+
+	lk sync.Mutex
 }
 
 func NewWallet(keystore types.KeyStore) (*Wallet, error) {
@@ -71,6 +75,9 @@ func (w *Wallet) Sign(ctx context.Context, addr address.Address, msg []byte) (*t
 }
 
 func (w *Wallet) findKey(addr address.Address) (*Key, error) {
+	w.lk.Lock()
+	defer w.lk.Unlock()
+
 	k, ok := w.keys[addr]
 	if ok {
 		return k, nil
@@ -91,11 +98,26 @@ func (w *Wallet) findKey(addr address.Address) (*Key, error) {
 }
 
 func (w *Wallet) Export(addr address.Address) ([]byte, error) {
-	panic("nyi")
+	k, err := w.findKey(addr)
+	if err != nil {
+		return nil, xerrors.Errorf("failed to find key to export: %w", err)
+	}
+
+	return json.Marshal(k)
 }
 
 func (w *Wallet) Import(kdata []byte) (address.Address, error) {
-	panic("nyi")
+	var ki types.KeyInfo
+	if err := json.Unmarshal(kdata, &ki); err != nil {
+		return address.Undef, xerrors.Errorf("failed to unmarshal input data: %w", err)
+	}
+
+	k, err := NewKey(ki)
+	if err != nil {
+		return address.Undef, xerrors.Errorf("failed to make key: %w", err)
+	}
+
+	return k.Address, nil
 }
 
 func (w *Wallet) ListAddrs() ([]address.Address, error) {
@@ -148,6 +170,9 @@ func GenerateKey(typ string) (*Key, error) {
 }
 
 func (w *Wallet) GenerateKey(typ string) (address.Address, error) {
+	w.lk.Lock()
+	defer w.lk.Unlock()
+
 	k, err := GenerateKey(typ)
 	if err != nil {
 		return address.Undef, err

cli/wallet.go

@@ -1,6 +1,7 @@
 package cli
 
 import (
+	"encoding/hex"
 	"fmt"
 
 	"github.com/filecoin-project/go-lotus/chain/address"
@@ -14,6 +15,8 @@ var walletCmd = &cli.Command{
 		walletNew,
 		walletList,
 		walletBalance,
+		walletExport,
+		walletImport,
 	},
 }
 
@@ -97,3 +100,63 @@ var walletBalance = &cli.Command{
 		return nil
 	},
 }
+
+var walletExport = &cli.Command{
+	Name:  "export",
+	Usage: "export keys",
+	Action: func(cctx *cli.Context) error {
+		api, closer, err := GetFullNodeAPI(cctx)
+		if err != nil {
+			return err
+		}
+		defer closer()
+		ctx := ReqContext(cctx)
+
+		if !cctx.Args().Present() {
+			return fmt.Errorf("must specify key to export")
+		}
+
+		addr, err := address.NewFromString(cctx.Args().First())
+		if err != nil {
+			return err
+		}
+
+		b, err := api.WalletExport(ctx, addr)
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(hex.EncodeToString(b))
+		return nil
+	},
+}
+
+var walletImport = &cli.Command{
+	Name:  "import",
+	Usage: "import keys",
+	Action: func(cctx *cli.Context) error {
+		api, closer, err := GetFullNodeAPI(cctx)
+		if err != nil {
+			return err
+		}
+		defer closer()
+		ctx := ReqContext(cctx)
+
+		if !cctx.Args().Present() {
+			return fmt.Errorf("must specify key import data")
+		}
+
+		data, err := hex.DecodeString(cctx.Args().First())
+		if err != nil {
+			return err
+		}
+
+		addr, err := api.WalletImport(ctx, data)
+		if err != nil {
+			return err
+		}
+
+		fmt.Printf("imported key %s successfully!", addr)
+		return nil
+	},
+}

node/impl/full/wallet.go

@@ -68,3 +68,11 @@ func (a *WalletAPI) WalletDefaultAddress(ctx context.Context) (address.Address,
 	// TODO: store a default address in the config or 'wallet' portion of the repo
 	return addrs[0], nil
 }
+
+func (a *WalletAPI) WalletExport(ctx context.Context, addr address.Address) ([]byte, error) {
+	return a.Wallet.Export(addr)
+}
+
+func (a *WalletAPI) WalletImport(ctx context.Context, b []byte) (address.Address, error) {
+	return a.Wallet.Import(b)
+}