操作指导 HPB 主网代币发行
简介
本文详细提供了一种将DApp应用部署到HPB主网的方法。
该方法分为四个步骤
- 开发ERC20智能合约
- 使用Remix编译智能合约
- 使用myhpbwallet.com部署智能合约
- 使用HPB SDK调用智能合约
1.开发ERC20智能合约
开发者可以参考HPB开发手册: HPB DApp development guide
2.编译ERC20代币源代码
你可以从0开始开发自己的ERC20合约，也可以自定义一个模板：https://etherscan.io/address/0x1c95b093d6c236d3ef7c796fe33f9cc6b8606714
代码写好之后就可以开始编译，编译结束后点击“详情”、
在该窗口中复制对象部分
3.使用myhpbwallet.com部署HPB智能合约
访问https://myhpbwallet.com，点击合约链接。继续点击“部署合约”，把字节码拷贝到窗口中。Gas limit设置成自动。请注意不要调低价格，否则合约可能会创建失败。选择签名的方式，使用ledger或者私钥。
一旦交易被传送到网络中，页面的底部会出现绿色的区域。确保你复制了地址，这个是后续用来和前端应用交互的地址。下一步点击 “Access Wallet” 链接，并用钱包认证。然后你可以点击 “增加自定义代币“。输入之前复制的合约地址，代币符号以及小数位数。如果有问题可以访问https://hpbscan.org并且查看上一笔交易是否成功。（很多交易因为Gas Limit太低失败）
你现在可以在你钱包的右侧看到代币的数量
4.调用HPB的SDK部署智能合约
通过生成Java包装类来运行合约。创建HPBToken.abi和HPBToken.bin文件并且把他们复制到相应的文件中。
Introduce java SDk of HPB
<dependency>
<groupId>io.hpb.web3</groupId>
<artifactId>web3-hpb</artifactId>
<version>1.2.0</version>
</dependency>
//Creat new generation contract wrapper class GenContract
import java.util.Arrays;
import io.hpb.web3.codegen.SolidityFunctionWrapperGenerator;
public class GenContract {
public static void main(String[] args) {
try {
String SOLIDITY_TYPES_ARG = "--solidityTypes";
String packageName = "io.hpb.web3.contracts";
String outDirPath = "D:/contracts/java/";
String binDirPath = "D:/contracts/HPBToken.bin";
String abiDirPath = "D:/contracts/HPBToken.abi";
SolidityFunctionWrapperGenerator.main(Arrays.asList(SOLIDITY_TYPES_ARG, binDirPath, abiDirPath,"-p", packageName, "-o", outDirPath).toArray(new String[0]));
} catch (Exception e) {
e.printStackTrace();
}
}
//Generated class being HPBToken.java
//Delete all construct methods
protected HPBToken(String contractAddress, Web3 web3, Credentials credentials,BigInteger gasPrice, BigInteger gasLimit) {
super(BINARY, contractAddress, web3, credentials, gasPrice, gasLimit);
}
protected HPBToken(String contractAddress, Web3 web3, TransactionManager transactionManager,BigInteger gasPrice, BigInteger gasLimit) {
super(BINARY, contractAddress, web3, transactionManager, gasPrice, gasLimit);
}
//Add new construc methods
protected HPBToken(String contractAddress, Web3 web3, Credentials credentials,BigInteger gasPrice, BigInteger gasLimit) {
super(BINARY, contractAddress, web3, new RawTransactionManager(web3, credentials), new StaticGasProvider(gasPrice, gasLimit));
}
protected HPBToken(String contractAddress, Web3 web3, TransactionManager transactionManager,BigInteger gasPrice, BigInteger gasLimit) {
super(BINARY, contractAddress, web3, transactionManager, new StaticGasProvider(gasPrice, gasLimit));
}
protected HPBToken(String contractAddress, Web3 web3, TransactionManager transactionManager,ContractGasProvider gasProvider) {
super(BINARY, contractAddress, web3, transactionManager, gasProvider);
}
5. 使用HPB的SDK发布并调用智能合约。
private static final int WEB3J_TIMEOUT = 800;
public static void main(String[] args) throws Exception{
BigInteger gasPrice = Convert.toWei("18", Convert.Unit.GWEI).toBigInteger();
BigInteger gasLimit = new BigInteger("99000000");
Credentials credentials = WalletUtils.loadCredentials(password,keyStorePath);
Web3Service web3Service = buildService(clientAddress);
Admin admin = Admin.build(web3Service);
RawTransactionManager transactionManager=new RawTransactionManager(admin, credentials, ChainId.MAINNET);
Address _target=new Address(address);
HPBToken hpbTokenDeploy = HPBToken.deploy(admin, transactionManager, gasPrice, gasLimit, _target).
sendAsync().get(WEB3J_TIMEOUT, TimeUnit.MINUTES);
String contractAddress=hpbTokenDeploy.getContractAddress();
log.info("publish the smart contract："+contractAddress);
HPBToken hpbToken = HPBToken.load(contractAddress, admin, transactionManager, gasPrice, gasLimit);
Bool bool = hpbToken.saleStarted().sendAsync().get(WEB3J_TIMEOUT, TimeUnit.MINUTES);
log.info(bool);
TransactionReceipt receipt = hpbToken.transfer(new Address("0x09fe745cff05b35cb06da6768586279018c08d7f"), new Uint256(Convert.toWei("10", Convert.Unit.HPB).toBigInteger())).sendAsync().get(WEB3J_TIMEOUT, TimeUnit.MINUTES);
log.info(receipt.isStatusOK());
}
private static Web3Service buildService(String clientAddress) {
Web3Service Web3Service;
if (clientAddress == null || clientAddress.equals("")) {
Web3Service = new HttpService(createOkHttpClient());
} else if (clientAddress.startsWith("http")) {
Web3Service = new HttpService(clientAddress, createOkHttpClient(), false);
} else if (System.getProperty("os.name").toLowerCase().startsWith("win")) {
Web3Service = new WindowsIpcService(clientAddress);
} else {
Web3Service = new UnixIpcService(clientAddress);
}
return Web3Service;
}
private static OkHttpClient createOkHttpClient() {
OkHttpClient.Builder builder = new OkHttpClient.Builder();
configureLogging(builder);
configureTimeouts(builder);
return builder.build();
}
private static void configureTimeouts(OkHttpClient.Builder builder) {
builder.connectTimeout(WEB3J_TIMEOUT, TimeUnit.SECONDS);
builder.readTimeout(WEB3J_TIMEOUT, TimeUnit.SECONDS);
// Sets the socket timeout too
builder.writeTimeout(WEB3J_TIMEOUT, TimeUnit.SECONDS);
}
private static void configureLogging(OkHttpClient.Builder builder) {
if (log.isDebugEnabled()) {
HttpLoggingInterceptor logging = new HttpLoggingInterceptor(log::debug);
logging.setLevel(HttpLoggingInterceptor.Level.BODY);
builder.addInterceptor(logging);
}
}
总结
在HPB主网上可以很容易地创建基于合约的Dapp应用，和在以太坊上创建类似。开发源码，使用Remix重新编译，复制相应的bin和abi文件，使用HPB的SDK发布并调用合约，按照这些步骤操作就可以完成。