deth/dist/esm/vm/storage/DethBlockchain.js

Ethereum node focused on Developer Experience

import { bufferToHash, quantityToNumber } from '../../primitives';
/**
 * Simple, in memory, copyable blockchain
 */
export class DethBlockchain {
    constructor(blocks = []) {
        this.blocks = blocks;
    }
    getBlockByNumber(blockNumber) {
        return this.blocks[quantityToNumber(blockNumber)];
    }
    getBlockByHash(hash) {
        return this.blocks.filter(b => hash === bufferToHash(b.hash()))[0];
    }
    putBlock(block) {
        this.blocks.push(block);
        return block;
    }
    putGenesis(block) {
        if (this.blocks.length !== 0) {
            throw new Error(`Trying to put a genesis block on not empty chain! Chain has ${this.blocks.length} blocks already`);
        }
        this.blocks.push(block);
        return block;
    }
    getLatestBlock() {
        return this.blocks[this.blocks.length - 1];
    }
    copy() {
        return new DethBlockchain([...this.blocks]);
    }
}