115 lines
3.3 KiB
Go
115 lines
3.3 KiB
Go
// Copyright (c) 2017 The btcsuite developers
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// Copyright (c) 2016 The Decred developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package wallet
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import (
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"errors"
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"github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcutil"
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"github.com/btcsuite/btcwallet/waddrmgr"
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"github.com/btcsuite/btcwallet/walletdb"
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)
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// MakeMultiSigScript creates a multi-signature script that can be redeemed with
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// nRequired signatures of the passed keys and addresses. If the address is a
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// P2PKH address, the associated pubkey is looked up by the wallet if possible,
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// otherwise an error is returned for a missing pubkey.
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//
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// This function only works with pubkeys and P2PKH addresses derived from them.
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func (w *Wallet) MakeMultiSigScript(addrs []btcutil.Address, nRequired int) ([]byte, error) {
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pubKeys := make([]*btcutil.AddressPubKey, len(addrs))
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var dbtx walletdb.ReadTx
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var addrmgrNs walletdb.ReadBucket
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defer func() {
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if dbtx != nil {
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dbtx.Rollback()
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}
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}()
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// The address list will made up either of addreseses (pubkey hash), for
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// which we need to look up the keys in wallet, straight pubkeys, or a
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// mixture of the two.
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for i, addr := range addrs {
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switch addr := addr.(type) {
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default:
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return nil, errors.New("cannot make multisig script for " +
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"a non-secp256k1 public key or P2PKH address")
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case *btcutil.AddressPubKey:
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pubKeys[i] = addr
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case *btcutil.AddressPubKeyHash:
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if dbtx == nil {
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var err error
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dbtx, err = w.db.BeginReadTx()
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if err != nil {
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return nil, err
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}
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addrmgrNs = dbtx.ReadBucket(waddrmgrNamespaceKey)
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}
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addrInfo, err := w.Manager.Address(addrmgrNs, addr)
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if err != nil {
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return nil, err
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}
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serializedPubKey := addrInfo.(waddrmgr.ManagedPubKeyAddress).
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PubKey().SerializeCompressed()
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pubKeyAddr, err := btcutil.NewAddressPubKey(
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serializedPubKey, w.chainParams)
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if err != nil {
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return nil, err
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}
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pubKeys[i] = pubKeyAddr
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}
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}
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return txscript.MultiSigScript(pubKeys, nRequired)
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}
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// ImportP2SHRedeemScript adds a P2SH redeem script to the wallet.
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func (w *Wallet) ImportP2SHRedeemScript(script []byte) (*btcutil.AddressScriptHash, error) {
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var p2shAddr *btcutil.AddressScriptHash
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err := walletdb.Update(w.db, func(tx walletdb.ReadWriteTx) error {
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addrmgrNs := tx.ReadWriteBucket(waddrmgrNamespaceKey)
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// TODO(oga) blockstamp current block?
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bs := &waddrmgr.BlockStamp{
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Hash: *w.ChainParams().GenesisHash,
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Height: 0,
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}
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// As this is a regular P2SH script, we'll import this into the
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// BIP0044 scope.
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bip44Mgr, err := w.Manager.FetchScopedKeyManager(
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waddrmgr.KeyScopeBIP0084,
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)
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if err != nil {
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return err
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}
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addrInfo, err := bip44Mgr.ImportScript(addrmgrNs, script, bs)
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if err != nil {
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// Don't care if it's already there, but still have to
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// set the p2shAddr since the address manager didn't
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// return anything useful.
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if waddrmgr.IsError(err, waddrmgr.ErrDuplicateAddress) {
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// This function will never error as it always
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// hashes the script to the correct length.
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p2shAddr, _ = btcutil.NewAddressScriptHash(script,
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w.chainParams)
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return nil
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}
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return err
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}
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p2shAddr = addrInfo.Address().(*btcutil.AddressScriptHash)
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return nil
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})
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return p2shAddr, err
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}
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