import type { Hex } from '@metamask/utils';
import type { TransactionControllerMessenger } from '../TransactionController.js';
import type { GasFeeFlow, GasFeeFlowRequest, GasFeeFlowResponse, TransactionMeta } from '../types.js';
/**
 * Implementation of a gas fee flow that randomises the last digits of gas fee estimations
 */
export declare class RandomisedEstimationsGasFeeFlow implements GasFeeFlow {
    #private;
    matchesTransaction({ transactionMeta, messenger, }: {
        transactionMeta: TransactionMeta;
        messenger: TransactionControllerMessenger;
    }): boolean;
    getGasFees(request: GasFeeFlowRequest): Promise<GasFeeFlowResponse>;
}
/**
 * Randomises the least significant digits of a decimal gas fee value and converts it to a hexadecimal Wei value.
 *
 * This function preserves the more significant digits while randomizing only the least significant ones,
 * ensuring that fees remain close to the original estimation while providing randomisation.
 * The randomisation is performed in Wei units for more precision.
 *
 * @param gweiDecimalValue - The original gas fee value in Gwei (decimal)
 * @param numberOfDigitsToRandomizeAtTheEnd - The number of least significant digits to randomise
 * @param preservedNumberOfDigits - The number of most significant digits to preserve
 * @returns The randomised value converted to Wei in hexadecimal format
 */
export declare function randomiseDecimalGWEIAndConvertToHex(gweiDecimalValue: string | number, numberOfDigitsToRandomizeAtTheEnd: number, preservedNumberOfDigits: number): Hex;
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