/**
 * Fetches a swap quote from the SushiSwap API for a given token pair and amount.
 *
 * This function converts the input amount to base units using the token's decimals,
 * builds the required query parameters, and then fetches a quote with slippage consideration.
 *
 * @param chainId - The chain ID representing the target blockchain network.
 * @param args - An object containing swap parameters:
 *   - tokenIn: The address of the input token.
 *   - tokenOut: The address of the output token.
 *   - maxSlippage: The maximum allowed slippage percentage (e.g., 0.5 for 0.5%).
 *   - amount: The input amount in human-readable units (e.g., 1.5 ETH).
 *
 * @returns A promise resolving to the swap quote data.
 * @throws Throws a formatted error if token metadata fetch or quote API call fails.
 */
export declare const fetchSwapQuote: (chainId: string, args: {
    tokenIn: string;
    tokenOut: string;
    maxSlippage: number;
    amount: number;
}) => Promise<unknown>;