import { ViemWalletProvider } from "../../../walletProviders";
/**
 * Prepares and sends a token swap transaction via the SushiSwap module using the provided wallet provider.
 *
 * This function handles the full lifecycle of a swap:
 * 1. Validates network and chain information from the wallet provider.
 * 2. Fetches token metadata to convert the input amount into base units.
 * 3. Checks and sets token allowance if needed.
 * 4. Fetches the swap calldata from the SushiSwap module.
 * 5. Simulates the transaction using Viem’s `publicClient.call` (for dry-run).
 * 6. Sends the transaction using the wallet provider and waits for confirmation.
 *
 * @param walletProvider - A Viem-compatible wallet provider to interact with the blockchain.
 * @param args - Swap details:
 *   - tokenIn: Address of the input token.
 *   - tokenOut: Address of the output token.
 *   - maxSlippage: Maximum allowed slippage for the trade (in percent).
 *   - amount: Human-readable input amount (e.g., 1.5 ETH).
 *
 * @returns A promise resolving to the transaction hash if successful.
 *          If approval fails, returns an error string.
 * @throws Throws a formatted error if any stage in the swap process fails.
 */
export declare const prepareAndSendSwapTransaction: (walletProvider: ViemWalletProvider, args: {
    tokenIn: string;
    tokenOut: string;
    maxSlippage: number;
    amount: number;
}) => Promise<string>;