如何在Solana将合同(程序)与web3集成

Question

我正在使用@solana/web3.js库，并已测试创建新帐户和获取余额。现在我要将合同(Raydium Liquidity PoolV4(与web3进行集成。

我在谷歌上搜索过，找不到好的学习材料。你能帮我如何使用web3在solana中集成合同吗？谢谢

Answer 1

如果你想与智能合约集成，你必须知道智能合约的来源。该程序将为您提供有关如何创建交易说明的信息。

让我们看看Raydium。它们是封闭源代码程序端，但来自客户端代码。

我们可以看到dataLayout是：

const dataLayout = struct([u8('instruction'), nu64('amountIn'), nu64('minAmountOut')])

这告诉我们交换指令接收u64amountIn和u64minAmountOut。CCD_ 6是程序侧的CCD_。

可能很像spl交换交换指令

pub struct Swap {
/// SOURCE amount to transfer, output to DESTINATION is based on the exchange rate
pub amount_in: u64,
/// Minimum amount of DESTINATION token to output, prevents excessive slippage
pub minimum_amount_out: u64,
}

然后我们可以看到数据是用instruction: 9编码的，这意味着swap指令是程序中的第9条指令。

const data = Buffer.alloc(dataLayout.span)
dataLayout.encode(
{
instruction: 9,
amountIn,
minAmountOut
},
data
)

上面所做的是分配数据缓冲区并使用参数对其进行编码，以便事务执行正确的事务。

所以Rust程序看起来像这样：

pub enum RaydiumInstructions {
/** 0 **/Instruction0 (/**/),
/** 1 **/Instruction1 (/**/),
/** 2 **/Instruction2 (/**/),
/** 3 **/Instruction3 (/**/),
/** 4 **/Instruction4 (/**/),
/** 5 **/Instruction5 (/**/),
/** 6 **/Instruction6 (/**/),
/** 7 **/Instruction7 (/**/),
/** 8 **/Instruction8 (/**/),
/** 9 **/Swap (/**/)
}

我们需要知道此指令所需的账户才能与交易一起发送。如果您检查spl-swap，它会准确地列出哪些帐户、订单，以及它们是签名者还是可写者。11个账户。

///   0. `[]` Token-swap
///   1. `[]` swap authority
///   2. `[]` user transfer authority
///   3. `[writable]` token_(A|B) SOURCE Account, amount is transferable by user transfer authority,
///   4. `[writable]` token_(A|B) Base Account to swap INTO.  Must be the SOURCE token.
///   5. `[writable]` token_(A|B) Base Account to swap FROM.  Must be the DESTINATION token.
///   6. `[writable]` token_(A|B) DESTINATION Account assigned to USER as the owner.
///   7. `[writable]` Pool token mint, to generate trading fees
///   8. `[writable]` Fee account, to receive trading fees
///   9. `[]` Token program id
///   10. `[optional, writable]` Host fee account to receive additional trading fees
Swap(Swap),

你可以在Raydium的前端看到他们列出了交易的所有账户：

const keys = [
// spl token
{ pubkey: TOKEN_PROGRAM_ID, isSigner: false, isWritable: false },
// amm
{ pubkey: ammId, isSigner: false, isWritable: true },
{ pubkey: ammAuthority, isSigner: false, isWritable: false },
{ pubkey: ammOpenOrders, isSigner: false, isWritable: true },
{ pubkey: ammTargetOrders, isSigner: false, isWritable: true },
{ pubkey: poolCoinTokenAccount, isSigner: false, isWritable: true },
{ pubkey: poolPcTokenAccount, isSigner: false, isWritable: true },
// serum
{ pubkey: serumProgramId, isSigner: false, isWritable: false },
{ pubkey: serumMarket, isSigner: false, isWritable: true },
{ pubkey: serumBids, isSigner: false, isWritable: true },
{ pubkey: serumAsks, isSigner: false, isWritable: true },
{ pubkey: serumEventQueue, isSigner: false, isWritable: true },
{ pubkey: serumCoinVaultAccount, isSigner: false, isWritable: true },
{ pubkey: serumPcVaultAccount, isSigner: false, isWritable: true },
{ pubkey: serumVaultSigner, isSigner: false, isWritable: false },
{ pubkey: userSourceTokenAccount, isSigner: false, isWritable: true },
{ pubkey: userDestTokenAccount, isSigner: false, isWritable: true },
{ pubkey: userOwner, isSigner: true, isWritable: false }
]

因此，下一步是追踪所有通过交易发送的账户。

最后，我们将这些添加到事务对象中并进行广播！

let transaction = new Transaction().add(new TransactionInstruction({
keys,
programId,
data
})
await sendTransaction(connection, wallet, transaction)