195 lines
7.3 KiB
Go
195 lines
7.3 KiB
Go
package personal
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import (
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"context"
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"fmt"
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"os"
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"time"
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"github.com/tharsis/ethermint/crypto/hd"
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ethermint "github.com/tharsis/ethermint/types"
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"github.com/tendermint/tendermint/libs/log"
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sdkcrypto "github.com/cosmos/cosmos-sdk/crypto"
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"github.com/cosmos/cosmos-sdk/crypto/keyring"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/tharsis/ethermint/crypto/ethsecp256k1"
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"github.com/tharsis/ethermint/ethereum/rpc/namespaces/eth"
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rpctypes "github.com/tharsis/ethermint/ethereum/rpc/types"
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)
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// PrivateAccountAPI is the personal_ prefixed set of APIs in the Web3 JSON-RPC spec.
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type PrivateAccountAPI struct {
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ethAPI *eth.PublicAPI
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logger log.Logger
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}
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// NewAPI creates an instance of the public Personal Eth API.
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func NewAPI(logger log.Logger, ethAPI *eth.PublicAPI) *PrivateAccountAPI {
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return &PrivateAccountAPI{
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ethAPI: ethAPI,
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logger: logger.With("api", "personal"),
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}
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}
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// ImportRawKey armors and encrypts a given raw hex encoded ECDSA key and stores it into the key directory.
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// The name of the key will have the format "personal_<length-keys>", where <length-keys> is the total number of
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// keys stored on the keyring.
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//
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// NOTE: The key will be both armored and encrypted using the same passphrase.
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func (api *PrivateAccountAPI) ImportRawKey(privkey, password string) (common.Address, error) {
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api.logger.Debug("personal_importRawKey")
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priv, err := crypto.HexToECDSA(privkey)
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if err != nil {
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return common.Address{}, err
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}
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privKey := ðsecp256k1.PrivKey{Key: crypto.FromECDSA(priv)}
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addr := sdk.AccAddress(privKey.PubKey().Address().Bytes())
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ethereumAddr := common.BytesToAddress(addr)
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// return if the key has already been imported
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if _, err := api.ethAPI.ClientCtx().Keyring.KeyByAddress(addr); err == nil {
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return ethereumAddr, nil
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}
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// ignore error as we only care about the length of the list
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list, _ := api.ethAPI.ClientCtx().Keyring.List()
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privKeyName := fmt.Sprintf("personal_%d", len(list))
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armor := sdkcrypto.EncryptArmorPrivKey(privKey, password, ethsecp256k1.KeyType)
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if err := api.ethAPI.ClientCtx().Keyring.ImportPrivKey(privKeyName, armor, password); err != nil {
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return common.Address{}, err
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}
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api.logger.Info("key successfully imported", "name", privKeyName, "address", ethereumAddr.String())
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return ethereumAddr, nil
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}
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// ListAccounts will return a list of addresses for accounts this node manages.
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func (api *PrivateAccountAPI) ListAccounts() ([]common.Address, error) {
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api.logger.Debug("personal_listAccounts")
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addrs := []common.Address{}
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list, err := api.ethAPI.ClientCtx().Keyring.List()
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if err != nil {
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return nil, err
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}
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for _, info := range list {
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addrs = append(addrs, common.BytesToAddress(info.GetPubKey().Address()))
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}
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return addrs, nil
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}
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// LockAccount will lock the account associated with the given address when it's unlocked.
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// It removes the key corresponding to the given address from the API's local keys.
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func (api *PrivateAccountAPI) LockAccount(address common.Address) bool { // nolint: interfacer
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api.logger.Debug("personal_lockAccount", "address", address.String())
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api.logger.Info("personal_lockAccount not supported")
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// TODO: Not supported. See underlying issue https://github.com/99designs/keyring/issues/85
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return false
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}
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// NewAccount will create a new account and returns the address for the new account.
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func (api *PrivateAccountAPI) NewAccount(password string) (common.Address, error) {
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api.logger.Debug("personal_newAccount")
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name := "key_" + time.Now().UTC().Format(time.RFC3339)
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// create the mnemonic and save the account
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info, _, err := api.ethAPI.ClientCtx().Keyring.NewMnemonic(name, keyring.English, ethermint.BIP44HDPath, password, hd.EthSecp256k1)
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if err != nil {
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return common.Address{}, err
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}
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addr := common.BytesToAddress(info.GetPubKey().Address().Bytes())
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api.logger.Info("Your new key was generated", "address", addr.String())
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api.logger.Info("Please backup your key file!", "path", os.Getenv("HOME")+"/.ethermint/"+name)
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api.logger.Info("Please remember your password!")
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return addr, nil
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}
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// UnlockAccount will unlock the account associated with the given address with
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// the given password for duration seconds. If duration is nil it will use a
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// default of 300 seconds. It returns an indication if the account was unlocked.
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func (api *PrivateAccountAPI) UnlockAccount(_ context.Context, addr common.Address, _ string, _ *uint64) (bool, error) { // nolint: interfacer
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api.logger.Debug("personal_unlockAccount", "address", addr.String())
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// TODO: Not supported. See underlying issue https://github.com/99designs/keyring/issues/85
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return false, nil
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}
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// SendTransaction will create a transaction from the given arguments and
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// tries to sign it with the key associated with args.To. If the given password isn't
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// able to decrypt the key it fails.
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func (api *PrivateAccountAPI) SendTransaction(_ context.Context, args rpctypes.SendTxArgs, pwrd string) (common.Hash, error) {
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return api.ethAPI.SendTransaction(args)
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}
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// Sign calculates an Ethereum ECDSA signature for:
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// keccak256("\x19Ethereum Signed Message:\n" + len(message) + message))
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//
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// Note, the produced signature conforms to the secp256k1 curve R, S and V values,
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// where the V value will be 27 or 28 for legacy reasons.
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//
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// The key used to calculate the signature is decrypted with the given password.
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//
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// https://github.com/ethereum/go-ethereum/wiki/Management-APIs#personal_sign
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func (api *PrivateAccountAPI) Sign(_ context.Context, data hexutil.Bytes, addr common.Address, pwrd string) (hexutil.Bytes, error) {
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api.logger.Debug("personal_sign", "data", data, "address", addr.String())
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cosmosAddr := sdk.AccAddress(addr.Bytes())
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sig, _, err := api.ethAPI.ClientCtx().Keyring.SignByAddress(cosmosAddr, accounts.TextHash(data))
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if err != nil {
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api.logger.Error("failed to sign with key", "data", data, "address", addr.String(), "error", err.Error())
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return nil, err
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}
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sig[crypto.RecoveryIDOffset] += 27 // transform V from 0/1 to 27/28
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return sig, nil
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}
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// EcRecover returns the address for the account that was used to create the signature.
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// Note, this function is compatible with eth_sign and personal_sign. As such it recovers
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// the address of:
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// hash = keccak256("\x19Ethereum Signed Message:\n"${message length}${message})
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// addr = ecrecover(hash, signature)
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//
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// Note, the signature must conform to the secp256k1 curve R, S and V values, where
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// the V value must be 27 or 28 for legacy reasons.
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//
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// https://github.com/ethereum/go-ethereum/wiki/Management-APIs#personal_ecRecove
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func (api *PrivateAccountAPI) EcRecover(_ context.Context, data, sig hexutil.Bytes) (common.Address, error) {
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api.logger.Debug("personal_ecRecover", "data", data, "sig", sig)
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if len(sig) != crypto.SignatureLength {
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return common.Address{}, fmt.Errorf("signature must be %d bytes long", crypto.SignatureLength)
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}
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if sig[crypto.RecoveryIDOffset] != 27 && sig[crypto.RecoveryIDOffset] != 28 {
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return common.Address{}, fmt.Errorf("invalid Ethereum signature (V is not 27 or 28)")
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}
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sig[crypto.RecoveryIDOffset] -= 27 // Transform yellow paper V from 27/28 to 0/1
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pubkey, err := crypto.SigToPub(accounts.TextHash(data), sig)
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if err != nil {
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return common.Address{}, err
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}
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return crypto.PubkeyToAddress(*pubkey), nil
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}
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