import type { TransactionMeta } from "@metamask/transaction-controller";
import type { Hex } from "@metamask/utils";
import type { TransactionPayControllerMessenger } from "../index.cjs";
import type { FiatValue } from "../types.cjs";
/**
 *
 * Calculate the estimated gas cost for a given transaction in fiat.
 *
 * @param transaction - Transaction to calculate gas cost for
 * @param messenger - Controller messenger.
 * @returns Estimated gas cost for the transaction.
 */
export declare function calculateGasCost(transaction: TransactionMeta, messenger: TransactionPayControllerMessenger): FiatValue;
/**
 * Get gas fee estimates for a given chain.
 *
 * @param chainId - Chain ID.
 * @param messenger - Controller messenger.
 * @returns Gas fee estimates for the chain.
 */
export declare function getGasFee(chainId: Hex, messenger: TransactionPayControllerMessenger): {
    estimatedBaseFee: string | undefined;
    maxFeePerGas: string | undefined;
    maxPriorityFeePerGas: string | undefined;
};
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