100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
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/*
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This file is part of go-ethereum
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go-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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go-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @authors
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* Gustav Simonsson <gustav.simonsson@gmail.com>
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* @date 2015
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*
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*/
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/*
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This abstracts part of a user's interaction with an account she controls.
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It's not an abstraction of core Ethereum accounts data type / logic -
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for that see the core processing code of blocks / txs.
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Currently this is pretty much a passthrough to the KeyStore2 interface,
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and accounts persistence is derived from stored keys' addresses
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*/
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package accounts
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import (
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crand "crypto/rand"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/crypto/secp256k1"
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)
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// TODO: better name for this struct?
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type UserAccount struct {
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Addr []byte
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}
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type AccountManager struct {
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keyStore crypto.KeyStore2
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}
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// TODO: get key by addr - modify KeyStore2 GetKey to work with addr
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// TODO: pass through passphrase for APIs which require access to private key?
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func NewAccountManager(keyStore crypto.KeyStore2) AccountManager {
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am := &AccountManager{
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keyStore: keyStore,
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}
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return *am
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}
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func (am *AccountManager) Sign(fromAddr []byte, keyAuth string, toSign []byte) (signature []byte, err error) {
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key, err := am.keyStore.GetKey(fromAddr, keyAuth)
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if err != nil {
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return nil, err
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}
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privKey := crypto.FromECDSA(key.PrivateKey)
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// TODO: what is second value?
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signature, err = secp256k1.Sign(toSign, privKey)
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return signature, err
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}
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func (am AccountManager) NewAccount(auth string) (*UserAccount, error) {
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key, err := am.keyStore.GenerateNewKey(crand.Reader, auth)
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if err != nil {
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return nil, err
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}
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ua := &UserAccount{
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Addr: key.Address,
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}
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return ua, err
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}
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// set of accounts == set of keys in given key store
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// TODO: do we need persistence of accounts as well?
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func (am *AccountManager) Accounts() ([]UserAccount, error) {
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addresses, err := am.keyStore.GetKeyAddresses()
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if err != nil {
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return nil, err
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}
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accounts := make([]UserAccount, len(addresses))
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for i, addr := range addresses {
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ua := &UserAccount{
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Addr: addr,
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}
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accounts[i] = *ua
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}
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return accounts, err
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}
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