/** Token amount needed for route economics calculations. */
export type Amount = {
    /** Quantity in the token's smallest unit. */
    baseUnits: string;
    /** Monetary denomination represented by the token. */
    currency: string;
    /** Number of decimal places used by the token. */
    decimals: number;
};
/** Returns the signed basis-point difference from a reference amount. */
export declare function differenceBps(options: differenceBps.Options): number | undefined;
export declare namespace differenceBps {
    /** Reference and observed values in the same monetary denomination. */
    type Options = {
        /** Amount treated as the zero-cost reference. */
        reference: Amount;
        /** Amount compared with the reference. */
        value: Amount;
    };
}
/** Returns a finite USD amount, or undefined for non-USD denominations. */
export declare function usd(amount: Amount): number | undefined;
/** Returns a finite amount expressed in whole token units. */
export declare function units(amount: Amount): number | undefined;
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