Add Commands (#1731)

This commit adds handling of Transaction commands.

VERSION

@@ -1 +1 @@
-0.39.1
+0.39.2

eth-node/core/types/transaction.go

@@ -0,0 +1,39 @@
+package types
+
+import (
+	"github.com/status-im/status-go/eth-node/types"
+	"math/big"
+)
+
+type Message struct {
+	to         *types.Address
+	from       types.Address
+	nonce      uint64
+	amount     *big.Int
+	gasLimit   uint64
+	gasPrice   *big.Int
+	data       []byte
+	checkNonce bool
+}
+
+func NewMessage(from types.Address, to *types.Address, nonce uint64, amount *big.Int, gasLimit uint64, gasPrice *big.Int, data []byte, checkNonce bool) Message {
+	return Message{
+		from:       from,
+		to:         to,
+		nonce:      nonce,
+		amount:     amount,
+		gasLimit:   gasLimit,
+		gasPrice:   gasPrice,
+		data:       data,
+		checkNonce: checkNonce,
+	}
+}
+
+func (m Message) From() types.Address { return m.from }
+func (m Message) To() *types.Address  { return m.to }
+func (m Message) GasPrice() *big.Int  { return m.gasPrice }
+func (m Message) Value() *big.Int     { return m.amount }
+func (m Message) Gas() uint64         { return m.gasLimit }
+func (m Message) Nonce() uint64       { return m.nonce }
+func (m Message) Data() []byte        { return m.data }
+func (m Message) CheckNonce() bool    { return m.checkNonce }

eth-node/crypto/crypto.go

@@ -1,13 +1,16 @@
 package crypto
 
 import (
+	"context"
 	"crypto/aes"
 	"crypto/cipher"
 	"crypto/ecdsa"
 	"crypto/rand"
 	"encoding/hex"
 	"errors"
 	"fmt"
+	types "github.com/status-im/status-go/eth-node/types"
+	"golang.org/x/crypto/sha3"
 
 	gethcrypto "github.com/ethereum/go-ethereum/crypto"
 )
@@ -192,3 +195,56 @@ func generateSecureRandomData(length int) ([]byte, error) {
 
 	return res, nil
 }
+
+// TextHash is a helper function that calculates a hash for the given message that can be
+// safely used to calculate a signature from.
+//
+// The hash is calulcated as
+//   keccak256("\x19Ethereum Signed Message:\n"${message length}${message}).
+//
+// This gives context to the signed message and prevents signing of transactions.
+func TextHash(data []byte) []byte {
+	hash, _ := TextAndHash(data)
+	return hash
+}
+
+// TextAndHash is a helper function that calculates a hash for the given message that can be
+// safely used to calculate a signature from.
+//
+// The hash is calulcated as
+//   keccak256("\x19Ethereum Signed Message:\n"${message length}${message}).
+//
+// This gives context to the signed message and prevents signing of transactions.
+func TextAndHash(data []byte) ([]byte, string) {
+	msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), string(data))
+	hasher := sha3.NewLegacyKeccak256()
+	hasher.Write([]byte(msg))
+	return hasher.Sum(nil), msg
+}
+
+func EcRecover(ctx context.Context, data types.HexBytes, sig types.HexBytes) (types.Address, error) {
+	// Returns the address for the Account that was used to create the signature.
+	//
+	// Note, this function is compatible with eth_sign and personal_sign. As such it recovers
+	// the address of:
+	// hash = keccak256("\x19${byteVersion}Ethereum Signed Message:\n${message length}${message}")
+	// addr = ecrecover(hash, signature)
+	//
+	// Note, the signature must conform to the secp256k1 curve R, S and V values, where
+	// the V value must be be 27 or 28 for legacy reasons.
+	//
+	// https://github.com/ethereum/go-ethereum/wiki/Management-APIs#personal_ecRecover
+	if len(sig) != 65 {
+		return types.Address{}, fmt.Errorf("signature must be 65 bytes long")
+	}
+	if sig[64] != 27 && sig[64] != 28 {
+		return types.Address{}, fmt.Errorf("invalid Ethereum signature (V is not 27 or 28)")
+	}
+	sig[64] -= 27 // Transform yellow paper V from 27/28 to 0/1
+	hash := TextHash(data)
+	rpk, err := SigToPub(hash, sig)
+	if err != nil {
+		return types.Address{}, err
+	}
+	return PubkeyToAddress(*rpk), nil
+}

eth-node/go.sum

@@ -257,6 +257,7 @@ github.com/status-im/doubleratchet v3.0.0+incompatible h1:aJ1ejcSERpSzmWZBgtfYti
 github.com/status-im/doubleratchet v3.0.0+incompatible/go.mod h1:1sqR0+yhiM/bd+wrdX79AOt2csZuJOni0nUDzKNuqOU=
 github.com/status-im/go-ethereum v1.9.5-status.6 h1:ytuTO1yBIAuTVRtRQoc2mrdyngtP+XOQ9IHIibbz7/I=
 github.com/status-im/go-ethereum v1.9.5-status.6/go.mod h1:08JvQWE+IOnAFSe4UD4ACLNe2fDd9XmWMCq5Yzy9mk0=
+github.com/status-im/go-ethereum v1.9.5-status.7 h1:DKH1GiF52LwaZaw6YDBliFEgm/JDsbIT+hn7ph6X94Q=
 github.com/status-im/go-ethereum v1.9.5-status.7/go.mod h1:YyH5DKB6+z+Vaya7eIm67pnuPZ1oiUMbbsZW41ktN0g=
 github.com/status-im/keycard-go v0.0.0-20190424133014-d95853db0f48 h1:ju5UTwk5Odtm4trrY+4Ca4RMj5OyXbmVeDAVad2T0Jw=
 github.com/status-im/keycard-go v0.0.0-20190424133014-d95853db0f48/go.mod h1:RZLeN1LMWmRsyYjvAu+I6Dm9QmlDaIIt+Y+4Kd7Tp+Q=

go.mod

@@ -23,20 +23,16 @@ replace github.com/status-im/status-go/waku => ./waku
 require (
 	github.com/beevik/ntp v0.2.0
 	github.com/ethereum/go-ethereum v1.9.5
-	github.com/go-playground/universal-translator v0.17.0 // indirect
 	github.com/golang/mock v1.3.1
-	github.com/leodido/go-urn v1.2.0 // indirect
 	github.com/lib/pq v1.2.0
-	github.com/libp2p/go-libp2p v0.4.0 // indirect; indirect
-	github.com/libp2p/go-libp2p-core v0.2.3
+	github.com/libp2p/go-libp2p v0.4.2 // indirect
+	github.com/libp2p/go-libp2p-core v0.2.4
 	github.com/multiformats/go-multiaddr v0.1.1
 	github.com/mutecomm/go-sqlcipher v0.0.0-20190227152316-55dbde17881f
 	github.com/okzk/sdnotify v0.0.0-20180710141335-d9becc38acbd
 	github.com/pborman/uuid v1.2.0
 	github.com/pkg/errors v0.8.1
 	github.com/prometheus/client_golang v1.2.1
-	github.com/russolsen/ohyeah v0.0.0-20160324131710-f4938c005315 // indirect
-	github.com/russolsen/same v0.0.0-20160222130632-f089df61f51d // indirect
 	github.com/russolsen/transit v0.0.0-20180705123435-0794b4c4505a
 	github.com/status-im/migrate/v4 v4.6.2-status.2
 	github.com/status-im/rendezvous v1.3.0
@@ -50,9 +46,6 @@ require (
 	github.com/syndtr/goleveldb v1.0.0
 	go.uber.org/zap v1.13.0
 	golang.org/x/crypto v0.0.0-20191122220453-ac88ee75c92c
-	golang.org/x/net v0.0.0-20190930134127-c5a3c61f89f3 // indirect
-	golang.org/x/tools v0.0.0-20191213032237-7093a17b0467 // indirect
-	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
 	gopkg.in/go-playground/validator.v9 v9.29.1
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 )