101 lines
3.2 KiB
JavaScript
101 lines
3.2 KiB
JavaScript
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var binpack = require('binpack');
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var merkleTree = require('./merkleTree.js');
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var transactions = require('./transactions.js');
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var util = require('./util.js');
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var BlockTemplate = module.exports = function BlockTemplate(jobId, rpcData, publicKey, reward, extraNoncePlaceholder){
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//private members
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var submits = [];
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function getMerkleHashes(steps){
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return steps.map(function(step){
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return util.reverseBuffer(step).toString('hex');
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});
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}
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function getTransactionBuffers(txs){
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var txHashes = txs.map(function(tx){
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return util.uint256BufferFromHash(tx.hash);
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});
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return [null].concat(txHashes);
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}
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//public members
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this.rpcData = rpcData;
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this.jobId = jobId;
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this.target = util.bignumFromBits(rpcData.bits);
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this.previousHashBuffer = util.reverseHex(rpcData.previousblockhash);
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this.transactionData = Buffer.concat(rpcData.transactions.map(function(tx){
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return new Buffer(tx.data, 'hex');
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}));
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this.merkleTree = new merkleTree(getTransactionBuffers(rpcData.transactions));
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this.merkleBranch = getMerkleHashes(this.merkleTree.steps);
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this.generationTransaction = new transactions.Generation(
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rpcData,
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publicKey,
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reward,
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extraNoncePlaceholder
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);
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this.serializeCoinbase = function(extraNonce1, extraNonce2){
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return Buffer.concat([
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this.generationTransaction.coinbase[0],
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extraNonce1,
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extraNonce2,
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this.generationTransaction.coinbase[1]
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]);
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};
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this.serializeHeader = function(merkleRootBuffer, nTimeBuffer, nonceBuffer){
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return Buffer.concat([
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binpack.packInt32(rpcData.version, 'big'),
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this.previousHashBuffer,
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merkleRootBuffer,
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nTimeBuffer,
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new Buffer(this.rpcData.bits, 'hex'),
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nonceBuffer
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]);
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};
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this.serializeBlock = function(header, coinbase){
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return Buffer.concat([
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header,
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util.varIntBuffer(this.rpcData.transaction.length + 1),
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coinbase,
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this.transactionData
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]);
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};
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this.registerSubmit = function(extraNonce1Buffer, extraNonce2, nTime, nonce){
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var submission = extraNonce1Buffer.toString('hex') + extraNonce2 + nTime + nonce;
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if (submits.indexOf(submission) === -1){
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submits.push(submission);
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return true;
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}
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return false;
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};
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this.getJobParams = function(){
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if (!this.jobParams){
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this.jobParams = [
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this.jobId,
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this.previousHashBuffer,
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this.generationTransaction.coinbase[0].toString('hex'),
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this.generationTransaction.coinbase[1].toString('hex'),
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this.merkleBranch,
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binpack.packInt32(this.rpcData.version, 'big').toString('hex'),
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this.rpcData.bits,
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binpack.packUInt32(this.rpcData.curtime, 'big').toString('hex'),
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true
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];
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}
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return this.jobParams;
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}
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} |