CPI từ một chương trình tùy chỉnh

┌──────────────┐   user tx    ┌────────────────┐  CPI  ┌──────────┐
│ user         │─────────────▶│ your program   │──────▶│ Raydium  │
└──────────────┘              │  (validate)    │       │  (CPMM)  │
                              └────────────────┘       └──────────┘

           deposit                   trigger
   user ───────────▶  PDA vault  ───────────────▶  Raydium swap
                     (your prog)                    (signed by PDA)
                                                            │
                                                            ▼
                                                    PDA vault (output mint)
                                                            │
                                                     withdraw ▼
                                                         user

instruction:
  CPI swap: tokenA → tokenB   (raydium, loose min)
  CPI swap: tokenB → tokenC   (raydium / third-party, loose min)
  CPI swap: tokenC → tokenD   (raydium, loose min)
  require(user.tokenD_ata.amount - pre_balance >= user_min_out)

use anchor_lang::prelude::*;
use anchor_spl::token::{Token, TokenAccount};

#[derive(Accounts)]
pub struct EscrowSwap<'info> {
    /// The escrow PDA; holds input mint and signs the CPI.
    #[account(
        mut,
        seeds = [b"escrow", user.key().as_ref()],
        bump = escrow.bump,
    )]
    pub escrow: Account<'info, Escrow>,

    #[account(mut)]
    pub user: Signer<'info>,

    // ----- Raydium-side accounts, mostly unchecked -----

    /// CHECK: validated by CPMM
    #[account(mut)] pub pool_state: UncheckedAccount<'info>,
    /// CHECK: validated by CPMM
    pub amm_config: UncheckedAccount<'info>,
    /// CHECK: validated by CPMM
    pub pool_authority: UncheckedAccount<'info>,
    #[account(mut)] pub input_vault:  Account<'info, TokenAccount>,
    #[account(mut)] pub output_vault: Account<'info, TokenAccount>,
    /// CHECK: validated by CPMM
    #[account(mut)] pub observation_state: UncheckedAccount<'info>,

    /// Escrow's input ATA — owned by the escrow PDA.
    #[account(
        mut,
        associated_token::mint = input_mint,
        associated_token::authority = escrow,
    )]
    pub escrow_input_ata: Account<'info, TokenAccount>,

    /// Escrow's output ATA.
    #[account(
        mut,
        associated_token::mint = output_mint,
        associated_token::authority = escrow,
    )]
    pub escrow_output_ata: Account<'info, TokenAccount>,

    pub input_mint:  Account<'info, anchor_spl::token::Mint>,
    pub output_mint: Account<'info, anchor_spl::token::Mint>,

    pub cpmm_program:       Program<'info, raydium_cp_swap::program::RaydiumCpSwap>,
    pub token_program:      Program<'info, Token>,
    pub token_program_2022: Program<'info, anchor_spl::token_2022::Token2022>,
}

use raydium_cp_swap::cpi::{self, accounts::Swap as CpmmSwap};

pub fn escrow_swap(
    ctx: Context<EscrowSwap>,
    amount_in: u64,
    minimum_amount_out: u64,
) -> Result<()> {
    let user_key = ctx.accounts.user.key();
    let bump     = ctx.accounts.escrow.bump;
    let seeds: &[&[u8]] = &[b"escrow", user_key.as_ref(), &[bump]];
    let signer: &[&[&[u8]]] = &[seeds];

    let cpi_accounts = CpmmSwap {
        payer:                ctx.accounts.user.to_account_info(),
        authority:            ctx.accounts.escrow.to_account_info(),
        amm_config:           ctx.accounts.amm_config.to_account_info(),
        pool_state:           ctx.accounts.pool_state.to_account_info(),
        input_token_account:  ctx.accounts.escrow_input_ata.to_account_info(),
        output_token_account: ctx.accounts.escrow_output_ata.to_account_info(),
        input_vault:          ctx.accounts.input_vault.to_account_info(),
        output_vault:         ctx.accounts.output_vault.to_account_info(),
        input_token_program:  ctx.accounts.token_program.to_account_info(),
        output_token_program: ctx.accounts.token_program.to_account_info(),
        input_token_mint:     ctx.accounts.input_mint.to_account_info(),
        output_token_mint:    ctx.accounts.output_mint.to_account_info(),
        observation_state:    ctx.accounts.observation_state.to_account_info(),
    };

    // Anchor 1.0 takes the program's Pubkey here, not its AccountInfo.
    let cpi_ctx = CpiContext::new_with_signer(
        *ctx.accounts.cpmm_program.key,
        cpi_accounts,
        signer,
    );

    cpi::swap_base_input(cpi_ctx, amount_in, minimum_amount_out)?;
    Ok(())
}

let cpi_ctx = CpiContext::new_with_signer(program_id, accounts, signer)
    .with_remaining_accounts(ctx.remaining_accounts.to_vec());

remaining = [
    tick_array_in_direction_0,    // first one crossed
    tick_array_in_direction_1,
    ...,
]

remaining = [
    reward_vault_0, user_reward_ata_0,
    reward_vault_1, user_reward_ata_1,
    // omit any slot whose reward_state is Uninitialized
]

import { ComputeBudgetProgram } from "@solana/web3.js";

const tx = new Transaction().add(
  ComputeBudgetProgram.setComputeUnitLimit({ units: 900_000 }),
  ComputeBudgetProgram.setComputeUnitPrice({ microLamports: priorityFeeMicroLamports }),
  yourInstruction,
);

cpi::swap_base_input(cpi_ctx, amount_in, minimum_amount_out)?;

use raydium_cp_swap::error::ErrorCode as CpmmErr;

match cpi::swap_base_input(cpi_ctx, amount_in, minimum_amount_out) {
    Ok(_) => {},
    Err(err) if is_err(err, CpmmErr::ExceededSlippage) => {
        // Your program might want to retry at a larger slippage, or unwind state.
        return err!(YourErr::PoolTooVolatile);
    }
    Err(err) => return Err(err),
}

#[account]
pub struct LimitOrder {
    pub user:          Pubkey,
    pub input_mint:    Pubkey,
    pub output_mint:   Pubkey,
    pub amount_in:     u64,
    pub min_out:       u64,
    pub expiry_unix:   i64,
    pub state:         u8,    // 0 open, 1 filled, 2 cancelled, 3 expired
    pub bump:          u8,
}

#[program]
pub mod limit_orders {
    use super::*;

    pub fn execute_order(
        ctx: Context<ExecuteOrder>,
    ) -> Result<()> {
        let order = &ctx.accounts.order;
        require!(order.state == 0, OrderErr::NotOpen);
        require!(Clock::get()?.unix_timestamp < order.expiry_unix, OrderErr::Expired);

        let user_key = order.user;
        let seeds: &[&[u8]] = &[b"order", user_key.as_ref(), &[order.bump]];
        let signer: &[&[&[u8]]] = &[seeds];

        let pre_out_balance = ctx.accounts.escrow_output_ata.amount;

        let cpi_accounts = CpmmSwap {
            payer:                ctx.accounts.keeper.to_account_info(),
            authority:            ctx.accounts.order.to_account_info(),
            amm_config:           ctx.accounts.amm_config.to_account_info(),
            pool_state:           ctx.accounts.pool_state.to_account_info(),
            input_token_account:  ctx.accounts.escrow_input_ata.to_account_info(),
            output_token_account: ctx.accounts.escrow_output_ata.to_account_info(),
            input_vault:          ctx.accounts.input_vault.to_account_info(),
            output_vault:         ctx.accounts.output_vault.to_account_info(),
            input_token_program:  ctx.accounts.token_program.to_account_info(),
            output_token_program: ctx.accounts.token_program.to_account_info(),
            input_token_mint:     ctx.accounts.input_mint.to_account_info(),
            output_token_mint:    ctx.accounts.output_mint.to_account_info(),
            observation_state:    ctx.accounts.observation_state.to_account_info(),
        };

        let cpi_ctx = CpiContext::new_with_signer(
            *ctx.accounts.cpmm_program.key,
            cpi_accounts,
            signer,
        );

        // Let the escrow enforce the minimum — we trust Raydium's slippage, but we
        // also re-check our own post-swap delta in case a future change ever relaxes it.
        cpi::swap_base_input(cpi_ctx, order.amount_in, order.min_out)?;

        ctx.accounts.escrow_output_ata.reload()?;
        let delta = ctx.accounts.escrow_output_ata.amount
            .checked_sub(pre_out_balance)
            .ok_or(error!(OrderErr::AccountingError))?;
        require!(delta >= order.min_out, OrderErr::InsufficientOutput);

        let order = &mut ctx.accounts.order;
        order.state = 1;
        Ok(())
    }
}

[test.validator]
clone = [
  { address = "CAMMCzo5YL8w4VFF8KVHrK22GGUsp5VTaW7grrKgrWqK" }, # CPMM
  { address = "CLMM...." },                                     # CLMM
  { address = "675kPX9MHTjS2zt1qfr1NYHuzeLXfQM9H24wFSUt1Mp8" }, # AMM v4
  { address = "FarmqiPv5eAj3j1GMdMCMUGXqPUvmquZtMy86QH6rzhG" }, # Farm v6
]