b4c2a0c88d
concurrent mining validity checks for new transactions/blocks/metadata rdf store stores quads smarter clearing of transactions from pool when a new block is mined change querying to be readonly and generic moved some things around
90 lines
2.6 KiB
JavaScript
90 lines
2.6 KiB
JavaScript
const Wallet = require('../wallet');
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const Transaction = require('../wallet/transaction');
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const Block = require('../blockchain/block');
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class Miner {
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static STATE_WAITING = 0;
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static STATE_RUNNING = 1;
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static STATE_INTERRUPTED = 2;
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static STATE_RESTARTING = 3;
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constructor(blockchain, transactionPool, wallet, p2pServer) {
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this.blockchain = blockchain;
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this.transactionPool = transactionPool;
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this.wallet = wallet;
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this.p2pServer = p2pServer;
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this.state = Miner.STATE_WAITING;
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this.mining = [[], []];
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this.lastBlock = null;
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}
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interrupt() {
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if (this.state === Miner.STATE_RUNNING) {
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this.state = Miner.STATE_INTERRUPTED;
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}
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}
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interruptIfContainsTransaction(transaction) {
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if (this.state === Miner.STATE_RUNNING && this.mining[0].find(t => t.id === transaction.id)) {
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this.state = Miner.STATE_INTERRUPTED;
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}
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}
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interruptIfContainsMetadata(metadata) {
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if (this.state === Miner.STATE_RUNNING && this.mining[1].find(t => t.id === metadata.id)) {
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this.state = Miner.STATE_INTERRUPTED;
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}
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}
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startMine() {
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//only continue if state is waiting or restarting
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if (this.state !== Miner.STATE_WAITING && this.state !== Miner.STATE_RESTARTING) {
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return;
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}
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const validTransactions = this.transactionPool.validTransactions();
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const validMetadataS = this.transactionPool.validMetadataS();
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if (validTransactions.length === 0 && validMetadataS.length === 0) {
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this.state = Miner.STATE_WAITING;
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return;
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}
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validTransactions.push(
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Transaction.rewardTransaction(this.wallet, Wallet.blockchainWallet())
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);
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this.lastBlock = this.blockchain.chain[this.blockchain.chain.length - 1];
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this.state = Miner.STATE_RUNNING;
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this.mining = [validTransactions, validMetadataS];
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this.nonce = 0;
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this.mine();
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}
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mine() {
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if (this.state !== Miner.STATE_RUNNING) {
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this.state = Miner.STATE_RESTARTING;
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startMine();
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return;
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}
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const timestamp = Date.now();
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const difficulty = Block.adjustDifficulty(this.lastBlock, timestamp);
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const hash = Block.hash(timestamp, this.lastBlock.hash, this.mining, this.nonce, difficulty);
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if (hash.substring(0, difficulty) === '0'.repeat(difficulty)) {
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//success
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this.p2pServer.newBlock(new Block(timestamp, this.lastBlock.hash, hash, this.mining, this.nonce, difficulty));
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this.state = Miner.STATE_RESTARTING;
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setImmediate(() => { this.startMine() });
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} else {
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//failure
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this.nonce++;
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setImmediate(() => { this.mine() });
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}
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}
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}
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module.exports = Miner;
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