import type { FetchGasFeeEstimateOptions, GasFeeState } from '@metamask/gas-fee-controller';
import type { Hex } from '@metamask/utils';
import type { TransactionControllerMessenger } from '../TransactionController.js';
import type { FeeMarketGasFeeEstimateForLevel, SavedGasFees, TransactionParams, TransactionMeta, GasFeeFlow } from '../types.js';
export type UpdateGasFeesRequest = {
    eip1559: boolean;
    gasFeeFlows: GasFeeFlow[];
    getGasFeeEstimates: (options: FetchGasFeeEstimateOptions) => Promise<GasFeeState>;
    getSavedGasFees: (transactionMeta: TransactionMeta) => SavedGasFees | undefined;
    messenger: TransactionControllerMessenger;
    txMeta: TransactionMeta;
};
export type GetGasFeeRequest = UpdateGasFeesRequest & {
    initialParams: TransactionParams;
    savedGasFees?: SavedGasFees;
    suggestedGasFees: SuggestedGasFees;
};
type SuggestedGasFees = {
    maxFeePerGas?: string;
    maxPriorityFeePerGas?: string;
    gasPrice?: string;
    /**
     * Whether the suggested fee was derived from a specific estimate level,
     * such as `low`/`medium`/`high`. This is `false` for estimate types that
     * do not support per-level pricing, such as a flat `eth_gasPrice` value,
     * or when the gas fee flow failed and a raw RPC fallback was used.
     */
    isEstimateLevelApplied?: boolean;
    low?: FeeMarketGasFeeEstimateForLevel;
};
/**
 * Update the gas fee properties of the provided transaction meta.
 *
 * @param request - The request object.
 */
export declare function updateGasFees(request: UpdateGasFeesRequest): Promise<void>;
/**
 * Convert GWEI from decimal string to WEI as hex string.
 *
 * @param value - The GWEI value as a decimal string.
 * @returns The WEI value in hex.
 */
export declare function gweiDecimalToWeiHex(value: string): Hex;
/**
 * Converts a value from Gwei decimal representation to Wei decimal representation
 *
 * @param gweiDecimal - The value in Gwei as a string or number
 * @returns The value in Wei as a string
 *
 * @example
 * // Convert 1.5 Gwei to Wei
 * gweiDecimalToWeiDecimal("1.5")
 * // Returns "1500000000"
 */
export declare function gweiDecimalToWeiDecimal(gweiDecimal: string | number): string;
export {};
//# sourceMappingURL=gas-fees.d.ts.map