仅限客户端方法：此方法仅在 TypeScript SDK 中可用，不会向服务器发起实际的 JSON-RPC 调用。它在本地构建支付指令。
TypeScript SDK 使用方法
const paymentInfo = await client.getPaymentInstruction({transaction: "base64EncodedTransaction",fee_token: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",source_wallet: "sourceWalletPublicKey"});// Append paymentInfo.payment_instruction to your transaction
响应结构
该方法返回一个支付指令对象，结构如下：
{"original_transaction": "base64EncodedTransaction","payment_address": "3Z1Ef7YaxK8oUMoi6exf7wYZjZKWJJsrzJXSt1c3qrDE","payment_amount": 0,"payment_instruction": {},"payment_token": "exampleValue","signer_address": "3Z1Ef7YaxK8oUMoi6exf7wYZjZKWJJsrzJXSt1c3qrDE"}
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