store-block.js

const addBlock = async (hashedBlock : string) => {
    const verifiedBlock = await verifyHashAndUnpack(hashedBlock);
    const verifiedTransactions = await asyncMap(verifiedBlock.transactions, verifySignatureAndUnpack);

    const fullyVerifiedBlock = {
        ...verifiedBlock,
        transactions: verifiedTransactions
    };

    const headNode = root.findValueByID(fullyVerifiedBlock.parentid);
    const hash = unpackHash(hashedBlock);

    if (headNode && divisibleBy(hash, headNode.getValue().difficulty)) {
        headNode.addChildNodeValue(fullyVerifiedBlock);
    }
};