bitcoin-calculate-balances.js

const getBalances = async () : Promise<Counter> => {
    const balances = new Counter();

    for (let { miner, reward, transactions } of root.getLongestChainAsValues()) {
        balances.add(miner, reward);

        for (let { receiver, amount, fee, sender } of transactions) {
            balances.add(miner, fee);
            balances.add(receiver, amount);
            balances.subtract(sender, amount);
            balances.subtract(sender, fee);
        }
    }

    return balances;
};