import type BN from 'bn.js';
import type { TransactionControllerMessenger } from '../TransactionController.js';
import type { Layer1GasFeeFlowRequest, TransactionMeta } from '../types.js';
import { OracleLayer1GasFeeFlow } from './OracleLayer1GasFeeFlow.js';
/**
 * Mantle layer 1 gas fee flow.
 *
 * Mantle uses MNT as its native gas token, but the oracle's getL1Fee returns
 * values denominated in ETH. This subclass multiplies the L1 fee by the
 * tokenRatio (ETH/MNT exchange rate) from the oracle contract to convert
 * the fee to MNT.
 */
export declare class MantleLayer1GasFeeFlow extends OracleLayer1GasFeeFlow {
    matchesTransaction({ transactionMeta, }: {
        transactionMeta: TransactionMeta;
        messenger: TransactionControllerMessenger;
    }): Promise<boolean>;
    protected getOperatorFeeGas(transactionMeta: TransactionMeta): string | undefined;
    protected transformOracleFee(oracleFee: BN, request: Layer1GasFeeFlowRequest): Promise<BN>;
}
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