67 lines
1.8 KiB
JavaScript
67 lines
1.8 KiB
JavaScript
var _ = require('lodash');
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var Bitcore = require('bitcore');
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var Address = Bitcore.Address;
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var PrivateKey = Bitcore.PrivateKey;
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var PublicKey = Bitcore.PublicKey;
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var crypto = Bitcore.crypto;
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var HDPath = require('./hdpath');
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function WalletUtils() {};
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/* TODO: It would be nice to be compatible with bitcoind signmessage. How
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* the hash is calculated there? */
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WalletUtils.hashMessage = function(text) {
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var buf = new Buffer(text);
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var ret = crypto.Hash.sha256sha256(buf);
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ret = new Bitcore.encoding.BufferReader(ret).readReverse();
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return ret;
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};
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WalletUtils.signMessage = function(text, privKey) {
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var priv = new PrivateKey(privKey);
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var hash = WalletUtils.hashMessage(text);
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return crypto.ECDSA.sign(hash, priv, 'little').toString();
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};
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WalletUtils.verifyMessage = function(text, signature, pubKey) {
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var pub = new PublicKey(pubKey);
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var hash = WalletUtils.hashMessage(text);
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try {
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var sig = new crypto.Signature.fromString(signature);
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return crypto.ECDSA.verify(hash, sig, pub, 'little');
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} catch (e) {
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return false;
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}
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};
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WalletUtils.deriveAddress = function(publicKeyRing, path, m, network) {
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var publicKeys = _.map(publicKeyRing, function(xPubKey) {
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var xpub = new Bitcore.HDPublicKey(xPubKey);
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return xpub.derive(path).publicKey;
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});
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var bitcoreAddress = Address.createMultisig(publicKeys, m, network);
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return {
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address: bitcoreAddress.toString(),
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path: path,
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publicKeys: _.invoke(publicKeys, 'toString'),
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};
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};
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WalletUtils.getProposalHash = function(toAddress, amount, message) {
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return toAddress + '|' + amount + '|' + (message || '');
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};
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WalletUtils.xPubToCopayerId = function(xpub) {
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return (new Bitcore.HDPublicKey(xpub)).derive(HDPath.IdBranch).publicKey.toString();
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};
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module.exports = WalletUtils;
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