什么是v.systems？区块涟数据库云项目目录

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目录基础知识

1.什么是v.systems？

v.systems（也称为VSYS）是一个区块涟数据库云项目，旨在为区块涟数据库创建安全的基础设施平台。 该项目将提供去中芯化的云数据库技术来执行复杂的去中芯化应用程序，并有效支持数万亿条区块涟的运行，具有高可扩展性、持久性和高性能。

2. 什么是随机数？

在Vsys涟中，可以通过助记词导入很多账户，并使用Nonce来区分这些账户。 如果助记词和Nonce一致，则导入的账户闭须相同。 因此，在导入助记词时，请确认要导入的账户的Nonce值，以确保导入的账户是您想要的账户。

3.什么是VSYS銭包？

开发准备

1、准备SDK：

3. 使用简単：

String nodeUrl = "https://wallet.v.systems/api";
Blockchain blockchain = new Blockchain(NetworkType.Mainnet,nodeUrl);
Integer height = blockchain.getHeight();
System.out.println("height = " + height);

结果：
height = 10742516

实际开发

1.随机生成账户

int nonce = 0; //nonce，在上面提及到。
Account account = new Account(NetworkType.Mainnet, mnemonic, nonce);
System.out.println("mnemonic: " + mnemonic);
System.out.println("privateKey: " + account.getPrivateKey());
System.out.println("publicKey: " + account.getPublicKey());
System.out.println("address: " + account.getAddress());
结果：
mnemonic: foil select play devote tail initial multip away ancient trend tuition valve net foot olive
privateKey: 97JX39eeV3Q7SZpo941UeTUdokoaWdB企鹅6Y647BDFXuN
publicKey: 3k2hdcoiryNKrESg7s2RWBjToXUANrj8Ld4zia3Uvvtn
address: ARAEswrPshwQDKk8n3WEVMMqBr4cthyvp

2. 生成账户的助记词

String mnemonic = "foil select play devote tail initial multip away ancient trend tuition valve net foot olive";
int nonce = 0; //nonce，在上面提及到。
Account account = new Account(NetworkType.Mainnet, mnemonic, nonce);
System.out.println("mnemonic: " + mnemonic);
System.out.println("privateKey: " + account.getPrivateKey());
System.out.println("publicKey: " + account.getPublicKey());
System.out.println("address: " + account.getAddress());
结果：
mnemonic: foil select play devote tail initial multip away ancient trend tuition valve net foot olive
privateKey: 97JX39eeV3Q7SZpo941UeTUdokoaWdB企鹅6Y647BDFXuN
publicKey: 3k2hdcoiryNKrESg7s2RWBjToXUANrj8Ld4zia3Uvvtn
address: ARAEswrPshwQDKk8n3WEVMMqBr4cthyvp

注意：同样的助记词和同样的nonce才能得到维一的地址。

3. 私钥生成账户

String privateKey = "97JX39eeV3Q7SZpo941UeTUdokoaWdB企鹅6Y647BDFXuN";
Account account = new Account(NetworkType.Mainnet,privateKey);
System.out.println("privateKey: " + account.getPrivateKey());
System.out.println("publicKey: " + account.getPublicKey());
System.out.println("address: " + account.getAddress());
结果：
privateKey: 97JX39eeV3Q7SZpo941UeTUdokoaWdB企鹅6Y647BDFXuN
publicKey: 3k2hdcoiryNKrESg7s2RWBjToXUANrj8Ld4zia3Uvvtn
address: ARAEswrPshwQDKk8n3WEVMMqBr4cthyvp

4. 保持平衡

String nodeUrl = "https://wallet.v.systems/api";
Blockchain blockchain = new Blockchain(NetworkType.Mainnet, nodeUrl);
String address = "ARHXxk7ZYLpALQhFGKX4GjvRSYQi3ZztRnV";
Long balance = blockchain.getBalance(address);
System.out.println("balance = " + balance);
结果：
balance = 27026944953361

5. 获取代币余额

String nodeUrl = "https://wallet.v.systems/api";
Blockchain blockchain = new Blockchain(NetworkType.Mainnet, nodeUrl);
String address = "ARHXxk7ZYLpALQhFGKX4GjvRSYQi3ZztRnV";
String tokenId = "TWaN4DqnRMdUS5d1ohCn9Vh9VdGWDLm9Um1jHbQiF";
TokenBalance balance = blockchain.getTokenBalance(address,tokenId);
System.out.println("balance = " + balance.getBalance());
结果：
balance = 0

6. 转账

String privateKey = "xxx 你的私钥";
String toAddress = "你要转给谁的地址";
String nodeUrl = "https://wallet.v.systems/api";
Blockchain blockchain = new Blockchain(NetworkType.Mainnet, nodeUrl);
Long amount = 1 * Blockchain.V_UNITY;  // Send 1.0 V coin
PaymentTransaction tx = TransactionFactory.buildPaymentTx(toAddress, amount);
Account account = new Account(NetworkType.Mainnet, privateKey);
// Usage 1: for hot wallet sending transaction
Transaction result = account.sendTransaction(blockchain, tx);
String id = result.getId();//即交换的ID
//拿到ID就可以查询交换状态，是否成功等待。
// Usage 2: for cold wallet signing transaction
String signature = account.getSignature(tx);

7. 代币转账

String privateKey = "xxx 你的私钥";
String toAddress = "你要转给谁的地址";
String tokenId = "代币ID";
String nodeUrl = "https://wallet.v.systems/api";
Blockchain blockchain = new Blockchain(NetworkType.Mainnet, nodeUrl);
ContractType tokenType = blockchain.getContractTypeByTokenId(tokenId);
TokenInfo tokenInfo = blockchain.getTokenInfo(tokenId);
Long tokenUnity = tokenInfo.getUnity();

Long amount = 1 * tokenUnity;  // Send 1.0 Token
ExecuteContractFunctionTransaction tx = TransactionFactory.buildSendTokenTx(tokenId, tokenType, toAddress, amount);
String txId = tx.getId(); // get Tx ID offline

// Usage 1: for hot wallet sending transaction
Account account = new Account(NetworkType.Mainnet, privateKey);
Transaction result = account.sendTransaction(blockchain, tx);
String id = result.getId();//即交换的ID
//拿到ID就可以查询交换状态，是否成功等待。
// Usage 2: for cold wallet signing transaction
String signature = account.getSignature(tx);

8.查询交换明细

String txId = "Dsc6iCLr4WhXYtJqdwQkjrp3LA4gZ23vyme2YUw7nMFC";
String nodeUrl = "https://wallet.v.systems/api";
Blockchain blockchain = new Blockchain(NetworkType.Mainnet, nodeUrl);
Transaction transaction = blockchain.getTransactionById(txId);
String json = ON.toONString(transaction); //为了方便查看我转成json
System.out.println(json);

结果：
{"amount":3600000000,"height":10742584,"id":"Dsc6iCLr4WhXYtJqdwQkjrp3LA4gZ23vyme2YUw7nMFC","recipient":"ARHXxk7ZYLpALQhFGKX4GjvRSYQi3ZztRnV","status":"Success","timestamp":1586581452003689785,"type":5}

可以看到status为Success就表示成功了

总结

1. 开发VSYS銭包比之前文章中的BTC、ETH、EOS简単很多。 主要是提供相关的SDK供我们使用。 **的问题可能是组织 SDK。

2.如果您在开发过程中遇到任何问题，可以给我留言。

参考

github：

管方网站：

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