在本指南中,我们将通过欧易 DEX 提供一个用例来进行 Solana 代币兑换。这个过程包括:
导入必要的 Node.js 库并设置你的环境变量以及定义辅助函数和组装参数 Node.js 环境设置
在以上基础上需要导入以下库
const bs58 = require('bs58');
const solanaWeb3 = require('@solana/web3.js');
const {Connection} = require("@solana/web3.js");
npm i bs58
npm i @solana/web3.js
curl --location --request GET 'https://www.okx.com/api/v5/dex/aggregator/swap?amount=1000&chainId=501&fromTokenAddress=11111111111111111111111111111111&toTokenAddress=So11111111111111111111111111111111111111112&userWalletAddress=3cUbuUEJkcgtzGxvsukksNzmgqaUK9jwFS5pqxxxxxxx&slippage=0.05' \
async function signTransaction(callData, privateKey) {
// decode
const transaction = bs58.decode(callData)
let tx
// There are two types of callData, one is the old version and the other is the new version.
try {
tx = solanaWeb3.Transaction.from(transaction)
} catch (error) {
tx = solanaWeb3.VersionedTransaction.deserialize(transaction)
}
// Replace the latest block hash
const recentBlockHash = await connection.getLatestBlockhash();
if (tx instanceof solanaWeb3.VersionedTransaction) {
tx.message.recentBlockhash = recentBlockHash.blockhash;
} else {
tx.recentBlockhash = recentBlockHash.blockhash
}
let feePayer = solanaWeb3.Keypair.fromSecretKey(bs58.decode(privateKey))
// sign
if (tx instanceof solanaWeb3.VersionedTransaction) {
// v0 callData
tx.sign([feePayer])
} else {
// legacy callData
tx.partialSign(feePayer)
}
console.log(tx)
}
// 'xxxxxxx' means your privateKey
signTransaction(callData,'xxxxxxx')
const txId = await connection.sendRawTransaction(tx.serialize());
console.log('txId:', txId)
// Verify whether it has been broadcast on the chain.
await connection.confirmTransaction(txId);
console.log(`https://solscan.io/tx/${txId}`);