52 lines
1.8 KiB
Go
52 lines
1.8 KiB
Go
// Copyright 2018 Weald Technology Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package util
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import (
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"crypto/ecdsa"
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"errors"
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"math/big"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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)
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// KeySigner generates a signer using a private key
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func KeySigner(chainID *big.Int, key *ecdsa.PrivateKey) (signerfn bind.SignerFn) {
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signerfn = func(address common.Address, tx *types.Transaction) (*types.Transaction, error) {
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keyAddr := crypto.PubkeyToAddress(key.PublicKey)
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if address != keyAddr {
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return nil, errors.New("not authorized to sign this account")
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}
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return types.SignTx(tx, types.NewEIP155Signer(chainID), key)
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}
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return
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}
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// AccountSigner generates a signer using an account
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func AccountSigner(chainID *big.Int, wallet *accounts.Wallet, account *accounts.Account, passphrase string) (signerfn bind.SignerFn) {
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signerfn = func(address common.Address, tx *types.Transaction) (*types.Transaction, error) {
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if address != account.Address {
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return nil, errors.New("not authorized to sign this account")
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}
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return (*wallet).SignTxWithPassphrase(*account, passphrase, tx, chainID)
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}
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return
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}
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