use RpcClient;
use Keypair;
/// Swap tokens on Raydium
///
/// Arguments:
/// * `client` - The client resource.
/// * `keypair` - The wallet resource.
/// * `input_mint` - The Solana pubkey of input token mint, 'sol' for native token.
/// * `output_mint` - The Solana pubkey of output token mint, 'sol' for native token.
/// * `amount` - The amount of token to trade.
///
/// Returns:
/// * `Result<(), Box<dyn std::error::Error>>` - The result of the swap.
///
/// **TODO**: Implement the swap function.