import type { NetworkClientId } from '@metamask/network-controller';
import type { Hex } from '@metamask/utils';
import type { GasFeeToken, TransactionControllerMessenger, TransactionMeta } from '../index.js';
import type { GetSimulationConfig } from '../types.js';
export type GetGasFeeTokensRequest = {
    chainId: Hex;
    isEIP7702GasFeeTokensEnabled: (transactionMeta: TransactionMeta) => Promise<boolean>;
    getSimulationConfig: GetSimulationConfig;
    messenger: TransactionControllerMessenger;
    publicKeyEIP7702?: Hex;
    transactionMeta: TransactionMeta;
};
/**
 * Get gas fee tokens for a transaction.
 *
 * @param request - The request object.
 * @param request.chainId - The chain ID of the transaction.
 * @param request.isEIP7702GasFeeTokensEnabled - Callback to check if EIP-7702 gas fee tokens are enabled.
 * @param request.messenger - The messenger instance.
 * @param request.publicKeyEIP7702 - Public key to validate EIP-7702 contract signatures.
 * @param request.transactionMeta - The transaction metadata.
 * @param request.getSimulationConfig - Optional transaction simulation parameters.
 * @returns An array of gas fee tokens.
 */
export declare function getGasFeeTokens({ chainId, isEIP7702GasFeeTokensEnabled, messenger, publicKeyEIP7702, transactionMeta, getSimulationConfig, }: GetGasFeeTokensRequest): Promise<{
    gasFeeTokens: GasFeeToken[];
    isGasFeeSponsored: boolean;
}>;
/**
 * Check and update gas fee token selection before publishing a transaction.
 *
 * @param request - Request object.
 * @param request.messenger - The transaction controller messenger.
 * @param request.networkClientId - The network client ID.
 * @param request.fetchGasFeeTokens - Function to fetch gas fee tokens.
 * @param request.transaction - Transaction metadata.
 * @param request.updateTransaction - Function to update the transaction.
 */
export declare function checkGasFeeTokenBeforePublish({ messenger, networkClientId, fetchGasFeeTokens, transaction, updateTransaction, }: {
    messenger: TransactionControllerMessenger;
    networkClientId: NetworkClientId;
    fetchGasFeeTokens: (transaction: TransactionMeta) => Promise<GasFeeToken[]>;
    transaction: TransactionMeta;
    updateTransaction: (transactionId: string, fn: (tx: TransactionMeta) => void) => void;
}): Promise<void>;
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