noob-ethereum
Version:
A simple Ethereum library
77 lines (76 loc) • 3.09 kB
JavaScript
;
// newer version of testing compared to rlp-block-lib.ts
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.verifyBlockHeader = exports.calculateBlockHeader = void 0;
const constants_1 = require("../../constants");
const rlp = __importStar(require("../../lib/rlp/rlp"));
const keccak_1 = __importDefault(require("keccak"));
function prepareBlockTuple(block) {
const blockNumber = parseInt(block.number, 16);
const tuple = [
block.parentHash,
block.sha3Uncles,
block.miner,
block.stateRoot,
block.transactionsRoot,
block.receiptsRoot,
block.logsBloom,
block.difficulty,
block.number,
block.gasLimit,
block.gasUsed,
block.timestamp,
block.extraData,
block.mixHash,
block.nonce,
];
// If a block after London Hardfork, add base fee to block tuple prior to encoding
if (blockNumber >= constants_1.LONDON_HARDFORK_BLOCK)
tuple.push(block.baseFeePerGas);
return tuple;
}
function calculateBlockHeader(block) {
const tuple = prepareBlockTuple(block);
const encoded = rlp.encode(tuple);
// could also do keccak256(encoded).toString('hex') using the ethereum library
const calculated = (0, keccak_1.default)('keccak256').update(Buffer.from(encoded)).digest('hex');
return '0x' + calculated;
}
exports.calculateBlockHeader = calculateBlockHeader;
function verifyBlockHeader(block) {
const expected = block.hash;
const calculated = calculateBlockHeader(block);
return expected === calculated;
}
exports.verifyBlockHeader = verifyBlockHeader;
const _12964874_json_1 = __importDefault(require("../../seeder/blocks/legacy/12964874.json"));
const calculated = calculateBlockHeader(_12964874_json_1.default);
console.log(calculated);
const isValid = verifyBlockHeader(_12964874_json_1.default);
console.log(isValid);