プログラムと Anchor

# メインネットからプログラムをダンプ
solana program dump CPMMoo8L3F4NbTegBCKVNunggL7H1ZpdTHKxQB5qKP1C cpmm-onchain.so

# 既知のソースからビルド
cargo build-sbf --manifest-path raydium-cp-swap/programs/cp-swap/Cargo.toml
cp target/deploy/raydium_cp_swap.so cpmm-source.so

# 比較
sha256sum cpmm-onchain.so cpmm-source.so

pub fn process_instruction(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    instruction_data: &[u8],
) -> ProgramResult {
    // 手動で instruction_data をパース
    // 手動でアカウントを検証
    // 手動でアカウントデータをデシリアライズ
    // 手動で signer/writable フラグをチェック
    // ... その後、実際の処理を実行
    Ok(())
}

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

    pub fn swap_base_input(
        ctx: Context<Swap>,       // Anchor 1.0: one lifetime.
                                  // Under 0.3x this was Context<'_, '_, '_, '_, Swap>.
        amount_in: u64,
        min_out: u64,
    ) -> Result<()> {
        // ビジネスロジックだけ — ctx は事前に検証済み
        Ok(())
    }
}

#[derive(Accounts)]
pub struct Swap<'info> {
    pub payer: Signer<'info>,
    pub amm_config: Account<'info, AmmConfig>,
    #[account(mut, seeds = [b"pool", amm_config.key().as_ref()], bump)]
    pub pool_state: AccountLoader<'info, PoolState>,
    #[account(mut)]
    pub input_vault: Box<Account<'info, TokenAccount>>,
    // ... その他のアカウント
}

Account discriminator:     sha256("account:PoolState")[0..8]
Instruction discriminator: sha256("global:swap_base_input")[0..8]

#[error_code]
pub enum ErrorCode {
    #[msg("Slippage tolerance exceeded")]
    SlippageExceeded,
    #[msg("Pool is disabled")]
    PoolDisabled,
    // ...
}

anchor idl fetch CPMMoo8L3F4NbTegBCKVNunggL7H1ZpdTHKxQB5qKP1C -o cpmm.idl.json

{
  "version":      "0.1.0",
  "name":         "raydium_cp_swap",
  "instructions": [ { "name": "swap_base_input", "accounts": [ ... ], "args": [ ... ] }, ... ],
  "accounts":     [ { "name": "PoolState", "type": { ... } }, ... ],
  "types":        [ { "name": "AmmConfig", "type": { ... } }, ... ],
  "errors":       [ { "code": 6000, "name": "SlippageExceeded", "msg": "..." }, ... ],
  "events":       [ { "name": "SwapEvent", "fields": [ ... ] }, ... ]
}

anchor idl build -o target/idl/cpmm.json
# TypeScript タイプは Anchor の ts-client によって自動生成
# Raydium SDK にはすでに含まれています

import { liquidityStateV4Layout, struct, u8, u64 }
  from "@raydium-io/raydium-sdk-v2";
import BN from "bn.js";

// `liquidityStateV4Layout` is exported for decoding AmmInfo. The instruction-data
// layout is internal to the SDK, so declare it yourself with the exported
// marshmallow helpers — note the first field is `instructionId`, not `instruction`.
const swapLayout = struct([u8("instructionId"), u64("amountIn"), u64("minAmountOut")]);

const data = Buffer.alloc(swapLayout.span);
swapLayout.encode(
  { instructionId: 9, amountIn: new BN(1_000_000), minAmountOut: new BN(950_000) },
  data,
);

const sim = await connection.simulateTransaction(tx);
console.log(sim.value.logs);

Program CPMMoo8... failed: custom program error: 0x1770

AnchorError: AccountNotInitialized. Error Number: 3012