在solana中调用transaction.from()后，是否有任何方法获得金额(我们在事务中发送的令牌数量).<

Question

var transaction = new web3.Transaction({
feePayer: new web3.PublicKey(
'2joML3MhVLPmASMDBYuaMzsFiCtdm3aityWu1pJZ1wg8',
),

}).add(
splToken.Token.createTransferInstruction(
programId,
user1TokenAccount.address,
user2TokenAccount.address,
user1Wallet.publicKey,
[],
1,
),
); let blockhashObj = await connection.getRecentBlockhash();
transaction.recentBlockhash = await blockhashObj.blockhash;

let endocdeTransction = transaction.serialize({
requireAllSignatures: false,
verifySignatures: false,
});

let newconnectiontransaction = web3.Transaction.from(newEncodedBuffer);

我想从newconnectiontranstion

获得金额i was getting amount in buffer data:

这种能力不是暴露现在JS一侧。要正确地做到这一点，我们需要公开这个结构体定义:https://github.com/solana-labs/solana-program-library/blob/e8b7009cc4d8cdd87232ccfc9ce93ab203ada496/token/js/client/token.js#L1519

在您这边，为了测试，您可以复制该结构布局，然后在事务数据上调用decode来反序列化它。在(未经测试的)代码中，这看起来像:

const decodedTransaction = Transaction.from(encodedTransaction);
const TransferInstructionLayout = BufferLayout.struct([
BufferLayout.u8('instruction'),
Layout.uint64('amount'),
]);
const instructionData = TransferInstructionLayout.decode(decodedTransaction.instructions[0].data);
console.log(instructionData.amount);

可能会遗漏一些步骤，但这将使您获得大部分的方法!如果你想添加一个PR来公开这些，那么其他人都可以使用它们。