Merge pull request #9 from Lwx7832/main

add close ATA

example-05-closeATA/README.md

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+当您的钱包中持有新代币时，都会为其创建一个特定的代币帐户。每次创建一个账户，都会支付约0.002 SOL的租金。本工具可帮你一键退租。

example-05-closeATA/index.js

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+const { Connection, PublicKey, Transaction, SystemProgram, sendAndConfirmTransaction, Keypair } = require("@solana/web3.js");
+const SPLTOKEN = require('@solana/spl-token');
+const bs58 = require('bs58');
+
+const RPC_ENDPOINT = 'https://aged-stylish-glade.solana-mainnet.quiknode.pro/xxx/';
+
+const connection = new Connection(RPC_ENDPOINT, 'confirmed');
+
+async function closeTokenAccounts(ownerAddress, payerKeyPair) {
+    const ownerPublicKey = new PublicKey(ownerAddress);
+
+    const tokenAccounts = await connection.getTokenAccountsByOwner(ownerPublicKey, { programId: SPLTOKEN.TOKEN_PROGRAM_ID });
+    const accountInfos = tokenAccounts.value;
+
+    const processedAccounts = accountInfos.map(infos => {
+        //解密getTokenAccountsByOwner返回的令牌账户data信息
+        const decoded = SPLTOKEN.AccountLayout.decode(infos.account.data);
+        return {
+            pubkey: infos.pubkey.toBase58(),
+            mint: decoded.mint.toBase58(),
+            lamports: parseInt(infos.account.lamports, 10),//剩余租金
+            amount: parseInt(decoded.amount, 10), //持币数量
+            isNative:decoded.isNative.toString(), //是否平台币
+            closeAuthorityOption: decoded.closeAuthorityOption.toString() //关闭权限 0是关 1是开
+        };
+    });
+
+    let transaction = new Transaction();
+    for (let accountinfo of processedAccounts) {
+        if (accountinfo.isNative == 0 && accountinfo.amount == "0" && accountinfo.closeAuthorityOption == "0") {
+          // 创建关闭账户的指令
+          const closeAccountInstruction = SPLTOKEN.createCloseAccountInstruction(
+            new PublicKey(accountinfo.pubkey),
+            ownerPublicKey,
+            ownerPublicKey, 
+            [],
+          );
+          transaction.add(closeAccountInstruction);
+        }
+    }
+
+    try {
+        const signature = await sendAndConfirmTransaction(connection, transaction, [payerKeyPair]);
+        console.error('signature:', signature);
+    } catch (error) {
+        console.error('交易发送失败:', error);
+    }
+}
+
+const walletPrivateKey = ''; // 发送者私钥
+const payerKeyPair = Keypair.fromSecretKey(bs58.decode(walletPrivateKey));
+
+const walletPublic = ''; // 发送者公钥
+
+closeTokenAccounts(walletPublic, payerKeyPair).catch(console.error);