Fees and cost surface

HieroKit exposes helpers to work with the SDK cost APIs and transaction records.

estimateExecutableCost(client, executable)

import { estimateExecutableCost } from "hierokit";
import {
  AccountBalanceQuery,
} from "@hiero-ledger/sdk";

const query = new AccountBalanceQuery().setAccountId("0.0.xxxx");
const cost = await estimateExecutableCost(client, query);

This wraps executable.getCost(client.raw) and returns an Hbar cost.

extractFeeFromRecord(record)

import { extractFeeFromRecord } from "hierokit";

type FeeBreakdown = {
  maxFee: Hbar | null;
  chargedFee: Hbar | null;
};

Given a TransactionRecord, returns the configured max transaction fee and the charged fee when available.