/
auth.go
47 lines (43 loc) · 1.65 KB
/
auth.go
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// 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 (
"errors"
"math/big"
"crypto/ecdsa"
"github.com/taiyuechain/taiyuechain/common"
"github.com/taiyuechain/taiyuechain/core/types"
"github.com/taiyuechain/taiyuechain/crypto"
)
// NewKeyedTransactor is a utility method to easily create a transaction signer
// from a single private key.
func NewKeyedTransactor(key *ecdsa.PrivateKey, chainId *big.Int) *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)
},
signer: types.NewSigner(chainId),
}
}