@ledgerhq/coin-icon/lib-es/getFeesForTransaction.js

Ledger Icon Coin integration

import { BigNumber } from "bignumber.js";
import { getFees } from "./api/node";
import { buildTransaction } from "./buildTransaction";
import { getStepPrice } from "./api/node";
import { FEES_SAFETY_BUFFER, calculateAmount } from "./logic";
import { getAbandonSeedAddress } from "@ledgerhq/cryptoassets";
/**
 * Fetch the transaction fees for a transaction
 *
 * @param {IconAccount} account
 * @param {Transaction} transaction
 */
const getEstimatedFees = async ({ account, transaction, }) => {
    const tx = {
        ...transaction,
        recipient: getAbandonSeedAddress(account.currency.id),
        // Always use a fake recipient to estimate fees
        amount: calculateAmount({
            account,
            transaction: {
                ...transaction,
                fees: new BigNumber(0),
            },
        }), // Remove fees if present since we are fetching fees
    };
    try {
        const { unsigned } = await buildTransaction(account, tx);
        const stepLimit = await getFees(unsigned, account);
        transaction.stepLimit = stepLimit;
        const stepPrice = await getStepPrice(account);
        return stepLimit.multipliedBy(stepPrice);
    }
    catch (_error) {
        // Fix ME, the API of Icon throws an error when getting the fee with maximum balance
        return FEES_SAFETY_BUFFER;
    }
};
export default getEstimatedFees;
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