/** Fee-token decimals: TIP-20 fixes 6 (1 token unit = 1 microdollar). */
export declare const tokenDecimals = 6;
/** Scaling between attodollar gas math and fee-token units, derived from the exponents. */
export declare const scalingFactor: bigint;
/**
 * Fee in fee-token base units for a gas amount priced in attodollars per gas
 * (ceiling division). Works for actual fees (`gasUsed × effectiveGasPrice`)
 * and signed caps (`gas × maxFeePerGas`) alike.
 *
 * @param gas - Gas amount.
 * @param gasPrice - Price in attodollars per gas.
 * @returns The fee in fee-token base units.
 */
export declare function fromGas(gas: bigint, gasPrice: bigint): bigint;
/**
 * Signed fee cap of a candidate transaction in fee-token base units:
 * `gas × maxFeePerGas` (attodollars) scaled through {@link fromGas}. Undefined
 * when either field is missing or unparseable, so callers can fail closed.
 *
 * @param request - Transaction-shaped fee fields.
 * @returns The cap in base units, or undefined.
 */
export declare function maxOf(request: {
    gas?: unknown;
    maxFeePerGas?: unknown;
}): bigint | undefined;
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