@ethereumjs/mpt/dist/esm/util/genesisState.js

Implementation of the modified merkle patricia tree as specified in Ethereum's yellow paper.

import { RLP } from '@ethereumjs/rlp';
import { Account, hexToBytes, isHexString, unpadBytes, unprefixedHexToBytes, } from '@ethereumjs/util';
import { keccak256 } from 'ethereum-cryptography/keccak.js';
import { MerklePatriciaTrie } from "../mpt.js";
/**
 * Derives the stateRoot of the genesis block based on genesis allocations
 */
export async function genesisMPTStateRoot(genesisState) {
    const trie = new MerklePatriciaTrie({ useKeyHashing: true });
    for (const [key, value] of Object.entries(genesisState)) {
        const address = isHexString(key) ? hexToBytes(key) : unprefixedHexToBytes(key);
        const account = new Account();
        if (typeof value === 'string') {
            account.balance = BigInt(value);
        }
        else {
            const [balance, code, storage, nonce] = value;
            if (balance !== undefined) {
                account.balance = BigInt(balance);
            }
            if (code !== undefined) {
                const codeBytes = isHexString(code) ? hexToBytes(code) : unprefixedHexToBytes(code);
                account.codeHash = keccak256(codeBytes);
            }
            if (storage !== undefined) {
                const storageTrie = new MerklePatriciaTrie({ useKeyHashing: true });
                for (const [k, val] of storage) {
                    const storageKey = isHexString(k) ? hexToBytes(k) : unprefixedHexToBytes(k);
                    const storageVal = RLP.encode(unpadBytes(isHexString(val) ? hexToBytes(val) : unprefixedHexToBytes(val)));
                    await storageTrie.put(storageKey, storageVal);
                }
                account.storageRoot = storageTrie.root();
            }
            if (nonce !== undefined) {
                account.nonce = BigInt(nonce);
            }
        }
        await trie.put(address, account.serialize());
    }
    return trie.root();
}
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