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accounts: added transactorFromKeyStore (#19685)

This commit is contained in:
Marius van der Wijden 2019-06-08 15:19:26 +02:00 committed by Guillaume Ballet
parent afb9e6513f
commit 6f80629383
1 changed files with 19 additions and 0 deletions
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19
accounts/abi/bind/auth.go
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@ -22,6 +22,7 @@ import (
"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"
@ -42,6 +43,24 @@ func NewTransactor(keyin io.Reader, passphrase string) (*TransactOpts, error) {
return NewKeyedTransactor(key.PrivateKey), nil
}
// NewTransactor is a utility method to easily create a transaction signer from
// an decrypted key from a keystore
func NewTransactorFromKeyStore(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 {