Move files to /model
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Matias Pando
parent
994654e043
commit
06c83a8aba
24 changed files with 133 additions and 130 deletions
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@ -1,350 +0,0 @@
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'use strict';
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var bitcore = require('bitcore');
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var _ = require('underscore');
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var util = bitcore.util;
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var Transaction = bitcore.Transaction;
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var BuilderMockV0 = require('./BuilderMockV0');;
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var TransactionBuilder = bitcore.TransactionBuilder;
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var Script = bitcore.Script;
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var Key = bitcore.Key;
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var buffertools = bitcore.buffertools;
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var preconditions = require('preconditions').instance();
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var VERSION = 1;
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var CORE_FIELDS = ['builderObj', 'inputChainPaths', 'version', 'comment'];
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function TxProposal(opts) {
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preconditions.checkArgument(opts);
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preconditions.checkArgument(opts.inputChainPaths, 'no inputChainPaths');
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preconditions.checkArgument(opts.builder, 'no builder');
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preconditions.checkArgument(opts.inputChainPaths, 'no inputChainPaths');
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this.inputChainPaths = opts.inputChainPaths;
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this.version = opts.version;
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this.builder = opts.builder;
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this.createdTs = opts.createdTs;
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this.createdTs = opts.createdTs;
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this._inputSigners = [];
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// CopayerIds
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this.creator = opts.creator;
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this.signedBy = opts.signedBy || {};
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this.seenBy = opts.seenBy || {};
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this.rejectedBy = opts.rejectedBy || {};
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this.sentTs = opts.sentTs || null;
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this.sentTxid = opts.sentTxid || null;
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this.comment = opts.comment || null;
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this.readonly = opts.readonly || null;
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this.merchant = opts.merchant || null;
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this._sync();
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}
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TxProposal.prototype._check = function() {
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if (this.builder.signhash && this.builder.signhash !== Transaction.SIGHASH_ALL) {
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throw new Error('Invalid tx proposal');
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}
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var tx = this.builder.build();
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if (!tx.ins.length)
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throw new Error('Invalid tx proposal: no ins');
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_.each(tx.ins, function(value, index) {
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var scriptSig = value.s;
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if (!scriptSig || !scriptSig.length) {
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throw new Error('Invalid tx proposal: no signatures');
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}
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var hashType = tx.getHashType(index);
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if (hashType && hashType !== Transaction.SIGHASH_ALL)
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throw new Error('Invalid tx proposal: bad signatures');
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});
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};
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TxProposal.prototype.rejectCount = function() {
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return _.size(this.rejectedBy);
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};
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TxProposal.prototype.isPending = function(maxRejectCount) {
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preconditions.checkArgument(typeof maxRejectCount != 'undefined');
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if (this.rejectCount() > maxRejectCount || this.sentTxid)
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return false;
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return true;
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};
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TxProposal.prototype._updateSignedBy = function() {
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this._inputSigners = [];
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var tx = this.builder.build();
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for (var i in tx.ins) {
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var scriptSig = new Script(tx.ins[i].s);
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var signatureCount = scriptSig.countSignatures();
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var info = TxProposal._infoFromRedeemScript(scriptSig);
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var txSigHash = tx.hashForSignature(info.script, parseInt(i), Transaction.SIGHASH_ALL);
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var signersPubKey = TxProposal._verifySignatures(info.keys, scriptSig, txSigHash);
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if (signersPubKey.length !== signatureCount)
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throw new Error('Invalid signature');
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this._inputSigners[i] = signersPubKey;
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};
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};
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TxProposal.prototype._sync = function() {
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this._check();
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this._updateSignedBy();
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return this;
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}
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TxProposal.prototype.getId = function() {
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preconditions.checkState(this.builder);
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return this.builder.build().getNormalizedHash().toString('hex');
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};
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TxProposal.prototype.toObj = function() {
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var o = JSON.parse(JSON.stringify(this));
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delete o['builder'];
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o.builderObj = this.builder.toObj();
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return o;
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};
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TxProposal._trim = function(o) {
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var ret = {};
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CORE_FIELDS.forEach(function(k) {
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ret[k] = o[k];
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});
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return ret;
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};
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TxProposal.fromObj = function(o, forceOpts) {
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preconditions.checkArgument(o.builderObj);
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delete o['builder'];
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forceOpts = forceOpts || {};
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if (forceOpts){
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o.builderObj.opts = o.builderObj.opts || {};
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}
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// force opts is requested.
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for (var k in forceOpts) {
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o.builderObj.opts[k] = forceOpts[k];
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}
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// Handle undef options
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if (_.isUndefined(forceOpts.fee) && _.isUndefined(forceOpts.feeSat)) {
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if (o.builderObj.opts) {
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o.builderObj.opts.fee = undefined;
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o.builderObj.opts.feeSat = undefined;
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}
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}
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try {
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o.builder = TransactionBuilder.fromObj(o.builderObj);
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} catch (e) {
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// backwards (V0) compatatibility fix.
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if (!o.version) {
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o.builder = new BuilderMockV0(o.builderObj);
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o.readonly = 1;
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};
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}
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return new TxProposal(o);
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};
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TxProposal.fromUntrustedObj = function(o, forceOpts) {
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return TxProposal.fromObj(TxProposal._trim(o), forceOpts);
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};
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TxProposal.prototype.toObjTrim = function() {
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return TxProposal._trim(this.toObj());
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};
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TxProposal._formatKeys = function(keys) {
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var ret = [];
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for (var i in keys) {
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if (!Buffer.isBuffer(keys[i]))
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throw new Error('keys must be buffers');
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var k = new Key();
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k.public = keys[i];
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ret.push({
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keyObj: k,
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keyHex: keys[i].toString('hex'),
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});
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}
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return ret;
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};
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TxProposal._verifySignatures = function(inKeys, scriptSig, txSigHash) {
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preconditions.checkArgument(Buffer.isBuffer(txSigHash));
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preconditions.checkArgument(inKeys);
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preconditions.checkState(Buffer.isBuffer(inKeys[0]));
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if (scriptSig.chunks[0] !== 0)
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throw new Error('Invalid scriptSig');
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var keys = TxProposal._formatKeys(inKeys);
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var ret = [];
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for (var i = 1; i <= scriptSig.countSignatures(); i++) {
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var chunk = scriptSig.chunks[i];
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var sigRaw = new Buffer(chunk.slice(0, chunk.length - 1));
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for (var j in keys) {
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var k = keys[j];
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if (k.keyObj.verifySignatureSync(txSigHash, sigRaw)) {
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ret.push(k.keyHex);
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break;
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}
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}
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}
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return ret;
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};
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TxProposal._infoFromRedeemScript = function(s) {
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var redeemScript = new Script(s.chunks[s.chunks.length - 1]);
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if (!redeemScript)
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throw new Error('Bad scriptSig (no redeemscript)');
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var pubkeys = redeemScript.capture();
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if (!pubkeys || !pubkeys.length)
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throw new Error('Bad scriptSig (no pubkeys)');
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return {
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keys: pubkeys,
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script: redeemScript,
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};
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};
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TxProposal.prototype.mergeBuilder = function(incoming) {
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var b0 = this.builder;
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var b1 = incoming.builder;
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var before = JSON.stringify(b0.toObj());
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b0.merge(b1);
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var after = JSON.stringify(b0.toObj());
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return after !== before;
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};
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TxProposal.prototype.setSeen = function(copayerId) {
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if (!this.seenBy[copayerId])
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this.seenBy[copayerId] = Date.now();
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};
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TxProposal.prototype.setRejected = function(copayerId) {
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if (this.signedBy[copayerId])
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throw new Error('Can not reject a signed TX');
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if (!this.rejectedBy[copayerId])
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this.rejectedBy[copayerId] = Date.now();
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};
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TxProposal.prototype.setSent = function(sentTxid) {
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this.sentTxid = sentTxid;
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this.sentTs = Date.now();
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};
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TxProposal.prototype._allSignatures = function() {
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var ret = {};
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for (var i in this._inputSigners)
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for (var j in this._inputSigners[i])
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ret[this._inputSigners[i][j]] = true;
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return ret;
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};
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TxProposal.prototype.setCopayers = function(senderId, keyMap, readOnlyPeers) {
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var newCopayer = {},
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oldCopayers = {},
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newSignedBy = {},
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readOnlyPeers = {},
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isNew = 1;
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for (var k in this.signedBy) {
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oldCopayers[k] = 1;
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isNew = 0;
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};
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if (isNew == 0) {
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if (!this.creator || !this.createdTs)
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throw new Error('Existing TX has no creator');
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if (!this.signedBy[this.creator])
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throw new Error('Existing TX is not signed by creator');
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if (Object.keys(this.signedBy).length === 0)
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throw new Error('Existing TX has no signatures');
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}
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var iSig = this._inputSigners[0];
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for (var i in iSig) {
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var copayerId = keyMap[iSig[i]];
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if (!copayerId)
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throw new Error('Found unknown signature')
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if (oldCopayers[copayerId]) {
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//Already have it. Do nothing
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} else {
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newCopayer[copayerId] = Date.now();
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delete oldCopayers[i];
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}
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}
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// Seems unncessary to check this:
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// if (!newCopayer[senderId] && !readOnlyPeers[senderId])
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// throw new Error('TX must have a (new) senders signature')
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if (Object.keys(newCopayer).length > 1)
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throw new Error('New TX must have only 1 new signature');
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// Handler creator / createdTs.
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// from senderId, and must be signed by senderId
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if (isNew) {
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this.creator = Object.keys(newCopayer)[0];
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this.seenBy[this.creator] = this.createdTs = Date.now();
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}
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//Ended. Update this.
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for (var i in newCopayer) {
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this.signedBy[i] = newCopayer[i];
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}
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// signedBy has preference over rejectedBy
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for (var i in this.signedBy) {
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delete this.rejectedBy[i];
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}
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return Object.keys(newCopayer);
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};
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// merge will not merge any metadata.
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TxProposal.prototype.merge = function(incoming) {
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var hasChanged = this.mergeBuilder(incoming);
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this._sync();
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return hasChanged;
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};
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//This should be on bitcore / Transaction
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TxProposal.prototype.countSignatures = function() {
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var tx = this.builder.build();
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var ret = 0;
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for (var i in tx.ins) {
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ret += tx.countInputSignatures(i);
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}
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return ret;
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};
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module.exports = TxProposal;
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