/**
 * Calculates the exchange rates between a source token and a destination token.
 *
 * Given the source amount and destination amount (as strings), this function:
 * - Computes the rate at which the source token converts to the destination token (`srcToDestRate`)
 * - Computes the rate at which the destination token converts back to the source token (`destToSrcRate`)
 *
 * @param srcAmount - The amount of source token (e.g., "1" ETH)
 * @param destAmount - The amount of destination token received in exchange (e.g., "3000" USDC)
 *
 * @returns An object containing:
 *   - `srcToDestRate`: The rate for 1 unit of source token in terms of destination token.
 *                      Example: 1 ETH = 3000 USDC → srcToDestRate = 3000
 *   - `destToSrcRate`: The rate for 1 unit of destination token in terms of source token.
 *                      Example: 1 USDC = 0.000333 ETH → destToSrcRate = 0.000333
 */
export declare function calculateRates(srcAmount: string, destAmount: string): {
    srcToDestRate: number;
    destToSrcRate: number;
};
