feat: added functionality to ask a client to sign a transaction and an endpoint to continue sending using provided signature

This functionality is needed in case the user wants to send a transaction and
signs it using the signature provided by the keycard (or any other compatible way).

api/geth_backend.go

@@ -1897,7 +1897,7 @@ func (b *GethStatusBackend) SendTransactionWithChainID(chainID uint64, sendArgs
 }
 
 func (b *GethStatusBackend) SendTransactionWithSignature(sendArgs transactions.SendTxArgs, sig []byte) (hash types.Hash, err error) {
-	hash, err = b.transactor.SendTransactionWithSignature(sendArgs, sig)
+	hash, err = b.transactor.SendTransactionWithSignature(b.transactor.NetworkID(), sendArgs, sig)
 	if err != nil {
 		return
 	}

go.mod

@@ -2,7 +2,7 @@ module github.com/status-im/status-go
 
 go 1.19
 
-replace github.com/ethereum/go-ethereum v1.10.26 => github.com/status-im/go-ethereum v1.10.25-status.7
+replace github.com/ethereum/go-ethereum v1.10.26 => github.com/status-im/go-ethereum v1.10.25-status.9
 
 replace github.com/docker/docker => github.com/docker/engine v1.4.2-0.20190717161051-705d9623b7c1
 

go.sum

@@ -1982,8 +1982,8 @@ github.com/spf13/viper v1.4.0/go.mod h1:PTJ7Z/lr49W6bUbkmS1V3by4uWynFiR9p7+dSq/y
 github.com/spf13/viper v1.7.0/go.mod h1:8WkrPz2fc9jxqZNCJI/76HCieCp4Q8HaLFoCha5qpdg=
 github.com/status-im/doubleratchet v3.0.0+incompatible h1:aJ1ejcSERpSzmWZBgtfYtiU2nF0Q8ZkGyuEPYETXkCY=
 github.com/status-im/doubleratchet v3.0.0+incompatible/go.mod h1:1sqR0+yhiM/bd+wrdX79AOt2csZuJOni0nUDzKNuqOU=
-github.com/status-im/go-ethereum v1.10.25-status.7 h1:egCCdvUQSdfnnDcv2vP1RCuIDr184eYlBvyucxuKJj8=
+github.com/status-im/go-ethereum v1.10.25-status.9 h1:NDuRs5TC4JjqPcYE8/sUtspdA+OwV1JRy3bbRLdIcL0=
-github.com/status-im/go-ethereum v1.10.25-status.7/go.mod h1:Dt4K5JYMhJRdtXJwBEyGZLZn9iz/chSOZyjVmt5ZhwQ=
+github.com/status-im/go-ethereum v1.10.25-status.9/go.mod h1:Dt4K5JYMhJRdtXJwBEyGZLZn9iz/chSOZyjVmt5ZhwQ=
 github.com/status-im/go-multiaddr-ethv4 v1.2.5 h1:pN+ey6wYKbvNNu5/xq9+VL0N8Yq0pZUTbZp0URg+Yn4=
 github.com/status-im/go-multiaddr-ethv4 v1.2.5/go.mod h1:Fhe/18yWU5QwlAYiOO3Bb1BLe0bn5YobcNBHsjRr4kk=
 github.com/status-im/go-sqlcipher/v4 v4.5.4-status.2 h1:Oi9JTAI2DZEe5UKlpUcvKBCCSn3ULsLIrix7jPnEoPE=

services/wallet/api.go

@@ -553,6 +553,11 @@ func (api *API) CreateMultiTransaction(ctx context.Context, multiTransactionComm
 	return api.s.transactionManager.CreateMultiTransactionFromCommand(ctx, multiTransactionCommand, data, api.router.bridges, password)
 }
 
+func (api *API) ProceedWithTransactionsSignatures(ctx context.Context, signatures map[string]transfer.SignatureDetails) (*transfer.MultiTransactionCommandResult, error) {
+	log.Debug("[WalletAPI:: ProceedWithTransactionsSignatures] sign with signatures and send multi transaction")
+	return api.s.transactionManager.ProceedWithTransactionsSignatures(ctx, signatures)
+}
+
 func (api *API) GetMultiTransactions(ctx context.Context, transactionIDs []transfer.MultiTransactionIDType) ([]*transfer.MultiTransaction, error) {
 	log.Debug("wallet.api.GetMultiTransactions", "IDs.len", len(transactionIDs))
 	return api.s.transactionManager.GetMultiTransactions(ctx, transactionIDs)

services/wallet/bridge/bridge.go

@@ -94,4 +94,5 @@ type Bridge interface {
 	CalculateAmountOut(from, to *params.Network, amountIn *big.Int, symbol string) (*big.Int, error)
 	Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (types.Hash, error)
 	GetContractAddress(network *params.Network, token *token.Token) *common.Address
+	BuildTransaction(sendArgs *TransactionBridge) (*ethTypes.Transaction, error)
 }

services/wallet/bridge/cbridge.go

@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	ethTypes "github.com/ethereum/go-ethereum/core/types"
@@ -244,33 +245,32 @@ func (s *CBridge) GetContractAddress(network *params.Network, token *token.Token
 	return nil
 }
 
-func (s *CBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (types.Hash, error) {
+func (s *CBridge) sendOrBuild(sendArgs *TransactionBridge, signerFn bind.SignerFn) (*ethTypes.Transaction, error) {
 	fromNetwork := s.rpcClient.NetworkManager.Find(sendArgs.ChainID)
 	if fromNetwork == nil {
-		return types.HexToHash(""), errors.New("network not found")
+		return nil, errors.New("network not found")
 	}
 	tk := s.tokenManager.FindToken(fromNetwork, sendArgs.CbridgeTx.Symbol)
 	if tk == nil {
-		return types.HexToHash(""), errors.New("token not found")
+		return nil, errors.New("token not found")
 	}
 	addrs := s.GetContractAddress(fromNetwork, nil)
 	if addrs == nil {
-		return types.HexToHash(""), errors.New("contract not found")
+		return nil, errors.New("contract not found")
 	}
 
 	backend, err := s.rpcClient.EthClient(sendArgs.ChainID)
 	if err != nil {
-		return types.HexToHash(""), err
+		return nil, err
 	}
 	contract, err := celer.NewCeler(*addrs, backend)
 	if err != nil {
-		return types.HexToHash(""), err
+		return nil, err
 	}
 
-	txOpts := sendArgs.CbridgeTx.ToTransactOpts(getSigner(sendArgs.ChainID, sendArgs.CbridgeTx.From, verifiedAccount))
+	txOpts := sendArgs.CbridgeTx.ToTransactOpts(signerFn)
-	var tx *ethTypes.Transaction
 	if tk.IsNative() {
-		tx, err = contract.SendNative(
+		return contract.SendNative(
 			txOpts,
 			sendArgs.CbridgeTx.Recipient,
 			(*big.Int)(sendArgs.CbridgeTx.Amount),
@@ -278,17 +278,21 @@ func (s *CBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.Sel
 			uint64(time.Now().UnixMilli()),
 			500,
 		)
-	} else {
-		tx, err = contract.Send(
-			txOpts,
-			sendArgs.CbridgeTx.Recipient,
-			tk.Address,
-			(*big.Int)(sendArgs.CbridgeTx.Amount),
-			sendArgs.CbridgeTx.ChainID,
-			uint64(time.Now().UnixMilli()),
-			500,
-		)
 	}
+
+	return contract.Send(
+		txOpts,
+		sendArgs.CbridgeTx.Recipient,
+		tk.Address,
+		(*big.Int)(sendArgs.CbridgeTx.Amount),
+		sendArgs.CbridgeTx.ChainID,
+		uint64(time.Now().UnixMilli()),
+		500,
+	)
+}
+
+func (s *CBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (types.Hash, error) {
+	tx, err := s.sendOrBuild(sendArgs, getSigner(sendArgs.ChainID, sendArgs.CbridgeTx.From, verifiedAccount))
 	if err != nil {
 		return types.HexToHash(""), err
 	}
@@ -296,6 +300,10 @@ func (s *CBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.Sel
 	return types.Hash(tx.Hash()), nil
 }
 
+func (s *CBridge) BuildTransaction(sendArgs *TransactionBridge) (*ethTypes.Transaction, error) {
+	return s.sendOrBuild(sendArgs, nil)
+}
+
 func (s *CBridge) CalculateAmountOut(from, to *params.Network, amountIn *big.Int, symbol string) (*big.Int, error) {
 	amt, err := s.estimateAmt(from, to, amountIn, symbol)
 	if err != nil {

services/wallet/bridge/erc721_transfer.go

@@ -3,8 +3,10 @@ package bridge
 import (
 	"math/big"
 
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	ethTypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/status-im/status-go/account"
 	"github.com/status-im/status-go/contracts/community-tokens/collectibles"
 	"github.com/status-im/status-go/eth-node/types"
@@ -74,32 +76,43 @@ func (s *ERC721TransferBridge) EstimateGas(from, to *params.Network, account com
 	return 80000, nil
 }
 
-func (s *ERC721TransferBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (hash types.Hash, err error) {
+func (s *ERC721TransferBridge) sendOrBuild(sendArgs *TransactionBridge, signerFn bind.SignerFn) (tx *ethTypes.Transaction, err error) {
 	ethClient, err := s.rpcClient.EthClient(sendArgs.ChainID)
 	if err != nil {
-		return hash, err
+		return tx, err
 	}
+
 	contract, err := collectibles.NewCollectibles(common.Address(*sendArgs.ERC721TransferTx.To), ethClient)
 	if err != nil {
-		return hash, err
+		return tx, err
 	}
+
 	nonce, unlock, err := s.transactor.NextNonce(s.rpcClient, sendArgs.ChainID, sendArgs.ERC721TransferTx.From)
 	if err != nil {
-		return hash, err
+		return tx, err
 	}
 	defer func() {
 		unlock(err == nil, nonce)
 	}()
 	argNonce := hexutil.Uint64(nonce)
 	sendArgs.ERC721TransferTx.Nonce = &argNonce
-	txOpts := sendArgs.ERC721TransferTx.ToTransactOpts(getSigner(sendArgs.ChainID, sendArgs.ERC721TransferTx.From, verifiedAccount))
+	txOpts := sendArgs.ERC721TransferTx.ToTransactOpts(signerFn)
-	tx, err := contract.SafeTransferFrom(txOpts, common.Address(sendArgs.ERC721TransferTx.From), sendArgs.ERC721TransferTx.Recipient, sendArgs.ERC721TransferTx.TokenID.ToInt())
+	return contract.SafeTransferFrom(txOpts, common.Address(sendArgs.ERC721TransferTx.From), sendArgs.ERC721TransferTx.Recipient,
+		sendArgs.ERC721TransferTx.TokenID.ToInt())
+}
+
+func (s *ERC721TransferBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (hash types.Hash, err error) {
+	tx, err := s.sendOrBuild(sendArgs, getSigner(sendArgs.ChainID, sendArgs.ERC721TransferTx.From, verifiedAccount))
 	if err != nil {
 		return hash, err
 	}
 	return types.Hash(tx.Hash()), nil
 }
 
+func (s *ERC721TransferBridge) BuildTransaction(sendArgs *TransactionBridge) (*ethTypes.Transaction, error) {
+	return s.sendOrBuild(sendArgs, nil)
+}
+
 func (s *ERC721TransferBridge) CalculateAmountOut(from, to *params.Network, amountIn *big.Int, symbol string) (*big.Int, error) {
 	return amountIn, nil
 }

services/wallet/bridge/hop.go

@@ -9,6 +9,7 @@ import (
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	ethTypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/status-im/status-go/account"
 	"github.com/status-im/status-go/contracts"
 	"github.com/status-im/status-go/contracts/hop"
@@ -173,15 +174,15 @@ func (h *HopBridge) GetContractAddress(network *params.Network, token *token.Tok
 	return &address
 }
 
-func (h *HopBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (hash types.Hash, err error) {
+func (h *HopBridge) sendOrBuild(sendArgs *TransactionBridge, signerFn bind.SignerFn) (tx *ethTypes.Transaction, err error) {
 	fromNetwork := h.contractMaker.RPCClient.NetworkManager.Find(sendArgs.ChainID)
 	if fromNetwork == nil {
-		return hash, err
+		return tx, err
 	}
 
 	nonce, unlock, err := h.transactor.NextNonce(h.contractMaker.RPCClient, sendArgs.ChainID, sendArgs.HopTx.From)
 	if err != nil {
-		return hash, err
+		return tx, err
 	}
 	defer func() {
 		unlock(err == nil, nonce)
@@ -191,25 +192,37 @@ func (h *HopBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.S
 
 	token := h.tokenManager.FindToken(fromNetwork, sendArgs.HopTx.Symbol)
 	if fromNetwork.Layer == 1 {
-		hash, err = h.sendToL2(sendArgs.ChainID, sendArgs.HopTx, verifiedAccount, token)
+		tx, err = h.sendToL2(sendArgs.ChainID, sendArgs.HopTx, signerFn, token)
-		return hash, err
+		return tx, err
 	}
-	hash, err = h.swapAndSend(sendArgs.ChainID, sendArgs.HopTx, verifiedAccount, token)
+	tx, err = h.swapAndSend(sendArgs.ChainID, sendArgs.HopTx, signerFn, token)
-	return hash, err
+	return tx, err
 }
 
-func (h *HopBridge) sendToL2(chainID uint64, hopArgs *HopTxArgs, verifiedAccount *account.SelectedExtKey, token *token.Token) (hash types.Hash, err error) {
+func (h *HopBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (hash types.Hash, err error) {
+	tx, err := h.sendOrBuild(sendArgs, getSigner(sendArgs.ChainID, sendArgs.HopTx.From, verifiedAccount))
+	if err != nil {
+		return types.Hash{}, err
+	}
+	return types.Hash(tx.Hash()), nil
+}
+
+func (h *HopBridge) BuildTransaction(sendArgs *TransactionBridge) (*ethTypes.Transaction, error) {
+	return h.sendOrBuild(sendArgs, nil)
+}
+
+func (h *HopBridge) sendToL2(chainID uint64, hopArgs *HopTxArgs, signerFn bind.SignerFn, token *token.Token) (tx *ethTypes.Transaction, err error) {
 	bridge, err := h.contractMaker.NewHopL1Bridge(chainID, hopArgs.Symbol)
 	if err != nil {
-		return hash, err
+		return tx, err
 	}
-	txOpts := hopArgs.ToTransactOpts(getSigner(chainID, hopArgs.From, verifiedAccount))
+	txOpts := hopArgs.ToTransactOpts(signerFn)
 	if token.IsNative() {
 		txOpts.Value = (*big.Int)(hopArgs.Amount)
 	}
 	now := time.Now()
 	deadline := big.NewInt(now.Unix() + 604800)
-	tx, err := bridge.SendToL2(
+	tx, err = bridge.SendToL2(
 		txOpts,
 		big.NewInt(int64(hopArgs.ChainID)),
 		hopArgs.Recipient,
@@ -220,25 +233,22 @@ func (h *HopBridge) sendToL2(chainID uint64, hopArgs *HopTxArgs, verifiedAccount
 		big.NewInt(0),
 	)
 
-	if err != nil {
+	return tx, err
-		return hash, err
-	}
-	return types.Hash(tx.Hash()), nil
 }
 
-func (h *HopBridge) swapAndSend(chainID uint64, hopArgs *HopTxArgs, verifiedAccount *account.SelectedExtKey, token *token.Token) (hash types.Hash, err error) {
+func (h *HopBridge) swapAndSend(chainID uint64, hopArgs *HopTxArgs, signerFn bind.SignerFn, token *token.Token) (tx *ethTypes.Transaction, err error) {
 	ammWrapper, err := h.contractMaker.NewHopL2AmmWrapper(chainID, hopArgs.Symbol)
 	if err != nil {
-		return hash, err
+		return tx, err
 	}
 
-	txOpts := hopArgs.ToTransactOpts(getSigner(chainID, hopArgs.From, verifiedAccount))
+	txOpts := hopArgs.ToTransactOpts(signerFn)
 	if token.IsNative() {
 		txOpts.Value = (*big.Int)(hopArgs.Amount)
 	}
 	now := time.Now()
 	deadline := big.NewInt(now.Unix() + 604800)
-	tx, err := ammWrapper.SwapAndSend(
+	tx, err = ammWrapper.SwapAndSend(
 		txOpts,
 		big.NewInt(int64(hopArgs.ChainID)),
 		hopArgs.Recipient,
@@ -250,11 +260,7 @@ func (h *HopBridge) swapAndSend(chainID uint64, hopArgs *HopTxArgs, verifiedAcco
 		deadline,
 	)
 
-	if err != nil {
+	return tx, err
-		return hash, err
-	}
-
-	return types.Hash(tx.Hash()), nil
 }
 
 // CalculateBonderFees logics come from: https://docs.hop.exchange/fee-calculation

services/wallet/bridge/transfer.go

@@ -4,6 +4,7 @@ import (
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
+	ethTypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/status-im/status-go/account"
 	"github.com/status-im/status-go/eth-node/types"
 	"github.com/status-im/status-go/params"
@@ -44,6 +45,10 @@ func (s *TransferBridge) Send(sendArgs *TransactionBridge, verifiedAccount *acco
 	return s.transactor.SendTransactionWithChainID(sendArgs.ChainID, *sendArgs.TransferTx, verifiedAccount)
 }
 
+func (s *TransferBridge) BuildTransaction(sendArgs *TransactionBridge) (*ethTypes.Transaction, error) {
+	return s.transactor.ValidateAndBuildTransaction(sendArgs.ChainID, *sendArgs.TransferTx)
+}
+
 func (s *TransferBridge) CalculateAmountOut(from, to *params.Network, amountIn *big.Int, symbol string) (*big.Int, error) {
 	return amountIn, nil
 }

services/wallet/transfer/commands_sequential_test.go

@@ -715,7 +715,7 @@ func TestFindBlocksCommand(t *testing.T) {
 
 		db, err := helpers.SetupTestMemorySQLDB(walletdatabase.DbInitializer{})
 		require.NoError(t, err)
-		tm := &TransactionManager{db, nil, nil, nil, nil, nil, nil}
+		tm := &TransactionManager{db, nil, nil, nil, nil, nil, nil, nil, nil, nil}
 
 		wdb := NewDB(db)
 		tc := &TestClient{

services/wallet/transfer/transaction.go

@@ -3,17 +3,21 @@ package transfer
 import (
 	"context"
 	"database/sql"
+	"encoding/hex"
 	"errors"
 	"fmt"
 	"math/big"
 	"strings"
 	"time"
 
+	ethTypes "github.com/ethereum/go-ethereum/core/types"
+
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/status-im/status-go/account"
+	"github.com/status-im/status-go/eth-node/crypto"
 	"github.com/status-im/status-go/eth-node/types"
 	"github.com/status-im/status-go/multiaccounts/accounts"
 	"github.com/status-im/status-go/params"
@@ -21,6 +25,7 @@ import (
 	"github.com/status-im/status-go/services/wallet/bridge"
 	wallet_common "github.com/status-im/status-go/services/wallet/common"
 	"github.com/status-im/status-go/services/wallet/walletevent"
+	"github.com/status-im/status-go/signal"
 	"github.com/status-im/status-go/transactions"
 )
 
@@ -33,6 +38,18 @@ const (
 	EventMTTransactionUpdate walletevent.EventType = "multi-transaction-update"
 )
 
+type SignatureDetails struct {
+	R string `json:"r"`
+	S string `json:"s"`
+	V string `json:"v"`
+}
+
+type TransactionDescription struct {
+	chainID   uint64
+	builtTx   *ethTypes.Transaction
+	signature []byte
+}
+
 type TransactionManager struct {
 	db             *sql.DB
 	gethManager    *account.GethManager
@@ -41,6 +58,10 @@ type TransactionManager struct {
 	accountsDB     *accounts.Database
 	pendingTracker *transactions.PendingTxTracker
 	eventFeed      *event.Feed
+
+	multiTransactionForKeycardSigning *MultiTransaction
+	transactionsBridgeData            []*bridge.TransactionBridge
+	transactionsForKeycardSingning    map[common.Hash]*TransactionDescription
 }
 
 func NewTransactionManager(
@@ -271,6 +292,7 @@ func (tm *TransactionManager) UpdateMultiTransaction(multiTransaction *MultiTran
 	return updateMultiTransaction(tm.db, multiTransaction)
 }
 
+// In case of keycard account, password should be empty
 func (tm *TransactionManager) CreateMultiTransactionFromCommand(ctx context.Context, command *MultiTransactionCommand,
 	data []*bridge.TransactionBridge, bridges map[string]bridge.Bridge, password string) (*MultiTransactionCommandResult, error) {
 
@@ -286,6 +308,33 @@ func (tm *TransactionManager) CreateMultiTransactionFromCommand(ctx context.Cont
 	}
 
 	multiTransaction.ID = uint(multiTransactionID)
+	if password == "" {
+		acc, err := tm.accountsDB.GetAccountByAddress(types.Address(multiTransaction.FromAddress))
+		if err != nil {
+			return nil, err
+		}
+
+		kp, err := tm.accountsDB.GetKeypairByKeyUID(acc.KeyUID)
+		if err != nil {
+			return nil, err
+		}
+
+		if !kp.MigratedToKeycard() {
+			return nil, fmt.Errorf("account being used is not migrated to a keycard, password is required")
+		}
+
+		tm.multiTransactionForKeycardSigning = multiTransaction
+		tm.transactionsBridgeData = data
+		hashes, err := tm.buildTransactions(bridges)
+		if err != nil {
+			return nil, err
+		}
+
+		signal.SendTransactionsForSigningEvent(hashes)
+
+		return nil, nil
+	}
+
 	hashes, err := tm.sendTransactions(multiTransaction, data, bridges, password)
 	if err != nil {
 		return nil, err
@@ -302,6 +351,61 @@ func (tm *TransactionManager) CreateMultiTransactionFromCommand(ctx context.Cont
 	}, nil
 }
 
+func (tm *TransactionManager) ProceedWithTransactionsSignatures(ctx context.Context, signatures map[string]SignatureDetails) (*MultiTransactionCommandResult, error) {
+	if tm.multiTransactionForKeycardSigning == nil {
+		return nil, errors.New("no multi transaction to proceed with")
+	}
+	if len(tm.transactionsBridgeData) == 0 {
+		return nil, errors.New("no transactions bridge data to proceed with")
+	}
+	if len(tm.transactionsForKeycardSingning) == 0 {
+		return nil, errors.New("no transactions to proceed with")
+	}
+	if len(signatures) != len(tm.transactionsForKeycardSingning) {
+		return nil, errors.New("not all transactions have been signed")
+	}
+
+	// check if all transactions have been signed
+	for hash, desc := range tm.transactionsForKeycardSingning {
+		sigDetails, ok := signatures[hash.String()]
+		if !ok {
+			return nil, fmt.Errorf("missing signature for transaction %s", hash)
+		}
+
+		rBytes, _ := hex.DecodeString(sigDetails.R)
+		sBytes, _ := hex.DecodeString(sigDetails.S)
+		vByte := byte(0)
+		if sigDetails.V == "1" {
+			vByte = 1
+		}
+
+		desc.signature = make([]byte, crypto.SignatureLength)
+		copy(desc.signature[32-len(rBytes):32], rBytes)
+		copy(desc.signature[64-len(rBytes):64], sBytes)
+		desc.signature[64] = vByte
+	}
+
+	// send transactions
+	hashes := make(map[uint64][]types.Hash)
+	for _, desc := range tm.transactionsForKeycardSingning {
+		hash, err := tm.transactor.SendBuiltTransactionWithSignature(desc.chainID, desc.builtTx, desc.signature)
+		if err != nil {
+			return nil, err
+		}
+		hashes[desc.chainID] = append(hashes[desc.chainID], hash)
+	}
+
+	err := tm.storePendingTransactions(tm.multiTransactionForKeycardSigning, hashes, tm.transactionsBridgeData)
+	if err != nil {
+		return nil, err
+	}
+
+	return &MultiTransactionCommandResult{
+		ID:     int64(tm.multiTransactionForKeycardSigning.ID),
+		Hashes: hashes,
+	}, nil
+}
+
 func (tm *TransactionManager) storePendingTransactions(multiTransaction *MultiTransaction,
 	hashes map[uint64][]types.Hash, data []*bridge.TransactionBridge) error {
 
@@ -359,6 +463,29 @@ func multiTransactionFromCommand(command *MultiTransactionCommand) *MultiTransac
 	return multiTransaction
 }
 
+func (tm *TransactionManager) buildTransactions(bridges map[string]bridge.Bridge) ([]string, error) {
+	tm.transactionsForKeycardSingning = make(map[common.Hash]*TransactionDescription)
+	var hashes []string
+	for _, bridgeTx := range tm.transactionsBridgeData {
+		builtTx, err := bridges[bridgeTx.BridgeName].BuildTransaction(bridgeTx)
+		if err != nil {
+			return hashes, err
+		}
+
+		signer := ethTypes.NewLondonSigner(big.NewInt(int64(bridgeTx.ChainID)))
+		txHash := signer.Hash(builtTx)
+
+		tm.transactionsForKeycardSingning[txHash] = &TransactionDescription{
+			chainID: bridgeTx.ChainID,
+			builtTx: builtTx,
+		}
+
+		hashes = append(hashes, txHash.String())
+	}
+
+	return hashes, nil
+}
+
 func (tm *TransactionManager) sendTransactions(multiTransaction *MultiTransaction,
 	data []*bridge.TransactionBridge, bridges map[string]bridge.Bridge, password string) (
 	map[uint64][]types.Hash, error) {

services/wallet/transfer/transaction_test.go

@@ -17,7 +17,7 @@ import (
 func setupTestTransactionDB(t *testing.T) (*TransactionManager, func()) {
 	db, err := helpers.SetupTestMemorySQLDB(walletdatabase.DbInitializer{})
 	require.NoError(t, err)
-	return &TransactionManager{db, nil, nil, nil, nil, nil, nil}, func() {
+	return &TransactionManager{db, nil, nil, nil, nil, nil, nil, nil, nil, nil}, func() {
 		require.NoError(t, db.Close())
 	}
 }

signal/events_wallet.go

@@ -4,7 +4,16 @@ const (
 	walletEvent = "wallet"
 )
 
+type UnsignedTransactions struct {
+	Type         string   `json:"type"`
+	Transactions []string `json:"transactions"`
+}
+
 // SendWalletEvent sends event from services/wallet/events.
 func SendWalletEvent(event interface{}) {
 	send(walletEvent, event)
 }
+
+func SendTransactionsForSigningEvent(transactions []string) {
+	send(walletEvent, UnsignedTransactions{Type: "sing-transactions", Transactions: transactions})
+}

transactions/transactor.go

@@ -26,7 +26,7 @@ const (
 
 	defaultGas = 90000
 
-	validSignatureSize = 65
+	ValidSignatureSize = 65
 )
 
 // ErrInvalidSignatureSize is returned if a signature is not 65 bytes to avoid panic from go-ethereum
@@ -93,23 +93,50 @@ func (t *Transactor) SendTransactionWithChainID(chainID uint64, sendArgs SendTxA
 	return
 }
 
+func (t *Transactor) ValidateAndBuildTransaction(chainID uint64, sendArgs SendTxArgs) (tx *gethtypes.Transaction, err error) {
+	wrapper := newRPCWrapper(t.rpcWrapper.RPCClient, chainID)
+	tx, err = t.validateAndBuildTransaction(wrapper, sendArgs)
+	return
+}
+
+func (t *Transactor) SendBuiltTransactionWithSignature(chainID uint64, tx *gethtypes.Transaction, sig []byte) (hash types.Hash, err error) {
+	if len(sig) != ValidSignatureSize {
+		return hash, ErrInvalidSignatureSize
+	}
+
+	rpcWrapper := newRPCWrapper(t.rpcWrapper.RPCClient, chainID)
+	chID := big.NewInt(int64(rpcWrapper.chainID))
+
+	signer := gethtypes.NewLondonSigner(chID)
+	signedTx, err := tx.WithSignature(signer, sig)
+	if err != nil {
+		return hash, err
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), t.rpcCallTimeout)
+	defer cancel()
+
+	if err := rpcWrapper.SendTransaction(ctx, signedTx); err != nil {
+		return hash, err
+	}
+	return types.Hash(signedTx.Hash()), nil
+}
+
 // SendTransactionWithSignature receive a transaction and a signature, serialize them together and propage it to the network.
 // It's different from eth_sendRawTransaction because it receives a signature and not a serialized transaction with signature.
 // Since the transactions is already signed, we assume it was validated and used the right nonce.
-func (t *Transactor) SendTransactionWithSignature(args SendTxArgs, sig []byte) (hash types.Hash, err error) {
+func (t *Transactor) SendTransactionWithSignature(chainID uint64, args SendTxArgs, sig []byte) (hash types.Hash, err error) {
 	if !args.Valid() {
 		return hash, ErrInvalidSendTxArgs
 	}
 
-	if len(sig) != validSignatureSize {
+	if len(sig) != ValidSignatureSize {
 		return hash, ErrInvalidSignatureSize
 	}
 
-	chainID := big.NewInt(int64(t.networkID))
-	signer := gethtypes.NewLondonSigner(chainID)
-
 	tx := t.buildTransaction(args)
-	expectedNonce, unlock, err := t.nonce.Next(t.rpcWrapper, args.From)
+	rpcWrapper := newRPCWrapper(t.rpcWrapper.RPCClient, chainID)
+	expectedNonce, unlock, err := t.nonce.Next(rpcWrapper, args.From)
 	if err != nil {
 		return hash, err
 	}
@@ -121,18 +148,7 @@ func (t *Transactor) SendTransactionWithSignature(args SendTxArgs, sig []byte) (
 		return hash, &ErrBadNonce{tx.Nonce(), expectedNonce}
 	}
 
-	signedTx, err := tx.WithSignature(signer, sig)
+	return t.SendBuiltTransactionWithSignature(chainID, tx, sig)
-	if err != nil {
-		return hash, err
-	}
-
-	ctx, cancel := context.WithTimeout(context.Background(), t.rpcCallTimeout)
-	defer cancel()
-
-	if err := t.rpcWrapper.SendTransaction(ctx, signedTx); err != nil {
-		return hash, err
-	}
-	return types.Hash(signedTx.Hash()), nil
 }
 
 func (t *Transactor) HashTransaction(args SendTxArgs) (validatedArgs SendTxArgs, hash types.Hash, err error) {
@@ -235,18 +251,14 @@ func (t *Transactor) validateAccount(args SendTxArgs, selectedAccount *account.S
 	return nil
 }
 
-func (t *Transactor) validateAndPropagate(rpcWrapper *rpcWrapper, selectedAccount *account.SelectedExtKey, args SendTxArgs) (hash types.Hash, err error) {
+func (t *Transactor) validateAndBuildTransaction(rpcWrapper *rpcWrapper, args SendTxArgs) (tx *gethtypes.Transaction, err error) {
-	if err = t.validateAccount(args, selectedAccount); err != nil {
-		return hash, err
-	}
-
 	if !args.Valid() {
-		return hash, ErrInvalidSendTxArgs
+		return tx, ErrInvalidSendTxArgs
 	}
 
 	nonce, unlock, err := t.nonce.Next(rpcWrapper, args.From)
 	if err != nil {
-		return hash, err
+		return tx, err
 	}
 	if args.Nonce != nil {
 		nonce = uint64(*args.Nonce)
@@ -261,10 +273,10 @@ func (t *Transactor) validateAndPropagate(rpcWrapper *rpcWrapper, selectedAccoun
 	if !args.IsDynamicFeeTx() && args.GasPrice == nil {
 		gasPrice, err = rpcWrapper.SuggestGasPrice(ctx)
 		if err != nil {
-			return hash, err
+			return tx, err
 		}
 	}
-	chainID := big.NewInt(int64(rpcWrapper.chainID))
+
 	value := (*big.Int)(args.Value)
 	var gas uint64
 	if args.Gas != nil {
@@ -289,20 +301,34 @@ func (t *Transactor) validateAndPropagate(rpcWrapper *rpcWrapper, selectedAccoun
 			Data:     args.GetInput(),
 		})
 		if err != nil {
-			return hash, err
+			return tx, err
 		}
 		if gas < defaultGas {
 			t.log.Info("default gas will be used because estimated is lower", "estimated", gas, "default", defaultGas)
 			gas = defaultGas
 		}
 	}
-	tx := t.buildTransactionWithOverrides(nonce, value, gas, gasPrice, args)
+	tx = t.buildTransactionWithOverrides(nonce, value, gas, gasPrice, args)
+	return tx, nil
+}
+
+func (t *Transactor) validateAndPropagate(rpcWrapper *rpcWrapper, selectedAccount *account.SelectedExtKey, args SendTxArgs) (hash types.Hash, err error) {
+	if err = t.validateAccount(args, selectedAccount); err != nil {
+		return hash, err
+	}
+
+	tx, err := t.validateAndBuildTransaction(rpcWrapper, args)
+	if err != nil {
+		return hash, err
+	}
+
+	chainID := big.NewInt(int64(rpcWrapper.chainID))
 	signedTx, err := gethtypes.SignTx(tx, gethtypes.NewLondonSigner(chainID), selectedAccount.AccountKey.PrivateKey)
 	if err != nil {
 		return hash, err
 	}
-	// ctx, cancel = context.WithTimeout(context.Background(), t.rpcCallTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), t.rpcCallTimeout)
-	// defer cancel()
+	defer cancel()
 
 	if err := rpcWrapper.SendTransaction(ctx, signedTx); err != nil {
 		return hash, err

transactions/transactor_test.go

@@ -374,7 +374,7 @@ func (s *TransactorSuite) TestSendTransactionWithSignature() {
 					Return(common.Hash{}, nil)
 			}
 
-			_, err = s.manager.SendTransactionWithSignature(args, sig)
+			_, err = s.manager.SendTransactionWithSignature(s.nodeConfig.NetworkID, args, sig)
 			if scenario.expectError {
 				s.Error(err)
 				// local nonce should not be incremented
@@ -393,7 +393,7 @@ func (s *TransactorSuite) TestSendTransactionWithSignature() {
 
 func (s *TransactorSuite) TestSendTransactionWithSignature_InvalidSignature() {
 	args := SendTxArgs{}
-	_, err := s.manager.SendTransactionWithSignature(args, []byte{})
+	_, err := s.manager.SendTransactionWithSignature(1, args, []byte{})
 	s.Equal(ErrInvalidSignatureSize, err)
 }
 

transactions/types.go

@@ -106,6 +106,11 @@ func (args SendTxArgs) ToTransactOpts(signerFn bind.SignerFn) *bind.TransactOpts
 		gasLimit = uint64(*args.Gas)
 	}
 
+	var noSign = false
+	if signerFn == nil {
+		noSign = true
+	}
+
 	return &bind.TransactOpts{
 		From:      common.Address(args.From),
 		Signer:    signerFn,
@@ -114,6 +119,7 @@ func (args SendTxArgs) ToTransactOpts(signerFn bind.SignerFn) *bind.TransactOpts
 		GasFeeCap: gasFeeCap,
 		GasTipCap: gasTipCap,
 		Nonce:     nonce,
+		NoSign:    noSign,
 	}
 }
 

vendor/github.com/ethereum/go-ethereum/accounts/abi/bind/base.go

@@ -61,6 +61,7 @@ type TransactOpts struct {
 
 	Context context.Context // Network context to support cancellation and timeouts (nil = no timeout)
 
+	NoSign bool // Do all transact steps but do not sign or send the transaction
 	NoSend bool // Do all transact steps but do not send the transaction
 }
 
@@ -387,6 +388,9 @@ func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, i
 	if err != nil {
 		return nil, err
 	}
+	if opts.NoSign {
+		return rawTx, nil
+	}
 	// Sign the transaction and schedule it for execution
 	if opts.Signer == nil {
 		return nil, errors.New("no signer to authorize the transaction with")

vendor/modules.txt

@@ -208,7 +208,7 @@ github.com/edsrzf/mmap-go
 ## explicit; go 1.14
 github.com/elastic/gosigar
 github.com/elastic/gosigar/sys/windows
-# github.com/ethereum/go-ethereum v1.10.26 => github.com/status-im/go-ethereum v1.10.25-status.7
+# github.com/ethereum/go-ethereum v1.10.26 => github.com/status-im/go-ethereum v1.10.25-status.9
 ## explicit; go 1.17
 github.com/ethereum/go-ethereum
 github.com/ethereum/go-ethereum/accounts