forked from cerc-io/plugeth
82 lines
2.8 KiB
Go
82 lines
2.8 KiB
Go
// Copyright 2016 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package bind
|
|
|
|
import (
|
|
"crypto/ecdsa"
|
|
"errors"
|
|
"io"
|
|
"io/ioutil"
|
|
|
|
"github.com/ethereum/go-ethereum/accounts"
|
|
"github.com/ethereum/go-ethereum/accounts/keystore"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
)
|
|
|
|
// NewTransactor is a utility method to easily create a transaction signer from
|
|
// an encrypted json key stream and the associated passphrase.
|
|
func NewTransactor(keyin io.Reader, passphrase string) (*TransactOpts, error) {
|
|
json, err := ioutil.ReadAll(keyin)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
key, err := keystore.DecryptKey(json, passphrase)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return NewKeyedTransactor(key.PrivateKey), nil
|
|
}
|
|
|
|
// NewKeystoreTransactor is a utility method to easily create a transaction signer from
|
|
// an decrypted key from a keystore
|
|
func NewKeyStoreTransactor(keystore *keystore.KeyStore, account accounts.Account) (*TransactOpts, error) {
|
|
return &TransactOpts{
|
|
From: account.Address,
|
|
Signer: func(signer types.Signer, address common.Address, tx *types.Transaction) (*types.Transaction, error) {
|
|
if address != account.Address {
|
|
return nil, errors.New("not authorized to sign this account")
|
|
}
|
|
signature, err := keystore.SignHash(account, signer.Hash(tx).Bytes())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return tx.WithSignature(signer, signature)
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
// NewKeyedTransactor is a utility method to easily create a transaction signer
|
|
// from a single private key.
|
|
func NewKeyedTransactor(key *ecdsa.PrivateKey) *TransactOpts {
|
|
keyAddr := crypto.PubkeyToAddress(key.PublicKey)
|
|
return &TransactOpts{
|
|
From: keyAddr,
|
|
Signer: func(signer types.Signer, address common.Address, tx *types.Transaction) (*types.Transaction, error) {
|
|
if address != keyAddr {
|
|
return nil, errors.New("not authorized to sign this account")
|
|
}
|
|
signature, err := crypto.Sign(signer.Hash(tx).Bytes(), key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return tx.WithSignature(signer, signature)
|
|
},
|
|
}
|
|
}
|