jupiter.rs

// Jupiter Swap Integration
// This code provides a more detailed integration with Jupiter V6

use anchor_lang::prelude::*;
use anchor_spl::token::{self, Token, TokenAccount, Transfer};
use anchor_lang::solana_program::instruction::{AccountMeta, Instruction};
use std::convert::TryInto;

// Jupiter V6 Program ID - Use the correct ID for your network (mainnet, devnet)
pub const JUPITER_V6_PROGRAM_ID: &str = "JUP6LkbZbjS1jKKwapdHbFPCynXJG8bKxgELtYynZi3";

// Jupiter route struct - representation of a swap route
#[derive(AnchorDeserialize, AnchorSerialize)]
pub struct JupiterRoute {
    pub in_amount: u64,
    pub out_amount: u64,
    pub slippage_bps: u16,
    pub route_plan: Vec<RoutePlanStep>,
}

// Route plan step for Jupiter
#[derive(AnchorDeserialize, AnchorSerialize)]
pub struct RoutePlanStep {
    pub swap_program_id: Pubkey,
    pub percent: u8,
    pub input_index: u8,
    pub output_index: u8,
}

/// Helper function to perform a swap using Jupiter V6
pub fn perform_jupiter_swap<'info>(
    ctx: &Context<'_, '_, '_, 'info, SwapAndDistribute<'info>>,
    from_token_account: &Account<'info, TokenAccount>,
    to_token: Pubkey,  // to token mint address
    amount: u64,
) -> Result<()> {
    // Parse the Jupiter program ID
    let jupiter_program_id = Pubkey::from_str(JUPITER_V6_PROGRAM_ID)
        .map_err(|_| error!(CustomError::InvalidJupiterProgramId))?;

    // Find accounts needed for Jupiter swap
    // Jupiter V6 swap instruction requires a specific list of accounts
    let accounts = get_jupiter_swap_accounts(
        ctx.accounts.authority.key(),
        from_token_account.mint,
        from_token_account.key(),
        to_token,
        ctx.remaining_accounts,
    )?;

    // Create Jupiter swap instruction data
    // This is a simplified version - you'd need to adapt this based on Jupiter's API
    // The actual structure depends on Jupiter's protocol version and implementation
    let route = JupiterRoute {
        in_amount: amount,
        out_amount: 0, // Minimum expected output - should be calculated based on slippage
        slippage_bps: 50, // 0.5% slippage
        route_plan: vec![
            // Example route step - in a real implementation, this would be queried from Jupiter API
            RoutePlanStep {
                swap_program_id: Pubkey::default(), // Would be the actual AMM program ID
                percent: 100, // 100% of swap through this route
                input_index: 0,
                output_index: 1,
            },
        ],
    };

    // Serialize the route data
    let mut instruction_data = vec![0]; // Instruction discriminator for Jupiter swap
    instruction_data.extend_from_slice(&route.try_to_vec()?);

    // Convert account_infos to account_metas
    let account_metas: Vec<AccountMeta> = accounts
        .iter()
        .map(|acc| {
            AccountMeta {
                pubkey: *acc.key,
                is_signer: acc.is_signer,
                is_writable: acc.is_writable,
            }
        })
        .collect();

    // Create the instruction
    let swap_instruction = Instruction {
        program_id: jupiter_program_id,
        accounts: account_metas,
        data: instruction_data,
    };

    // Invoke the Jupiter swap instruction
    anchor_lang::solana_program::program::invoke(
        &swap_instruction,
        &accounts,
    ).map_err(|_| error!(CustomError::JupiterSwapFailed))?;

    Ok(())
}

// Function to get the accounts needed for a Jupiter swap
// This is a simplified version and would need to be adapted to your specific Jupiter integration
fn get_jupiter_swap_accounts<'info>(
    authority: Pubkey,
    from_token_mint: Pubkey,
    from_token_account: Pubkey,
    to_token_mint: Pubkey,
    remaining_accounts: &[AccountInfo<'info>],
) -> Result<Vec<AccountInfo<'info>>> {
    // In a real implementation, you would need to:
    // 1. Query Jupiter API for the exact accounts needed for this specific swap
    // 2. Match those accounts with the provided remaining_accounts
    // 3. Order them correctly according to Jupiter's requirements
    
    // This is a placeholder implementation
    let mut jupiter_accounts = Vec::new();
    
    // Add required accounts for Jupiter swap
    // The exact accounts needed depend on Jupiter's implementation and the specific swap route
    
    // Example of filtering and finding accounts:
    for acc in remaining_accounts {
        // Logic to determine if this account is needed for Jupiter swap
        // You'd need custom logic based on Jupiter's requirements
        jupiter_accounts.push(acc.clone());
    }
    
    Ok(jupiter_accounts)
}

// Additional error codes
#[error_code]
pub enum CustomError {
    #[msg("Invalid Jupiter program ID.")]
    InvalidJupiterProgramId,
    
    #[msg("Jupiter swap failed.")]
    JupiterSwapFailed,
    
    #[msg("Missing required account for Jupiter swap.")]
    MissingJupiterAccount,
}