这篇文章主要介绍“web3j批量转账怎么实现”,在日常操作中,相信很多人在web3j批量转账怎么实现问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”web3j批量转账怎么实现”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
使用web3j来连接geth并转账,基本转账函数可以这样写:
//以太坊转账
//from:转出方账户
//password:转出方密码
//addrTo:收款账户
//value:转账额
public String transferEth(String from,String password,String to,BigInteger value) throws Exception
{
EthGetTransactionCount ethGetTransactionCount = ethClient.ethGetTransactionCount(
from, DefaultBlockParameterName.LATEST).sendAsync().get();
BigInteger nonce = ethGetTransactionCount.getTransactionCount();
PersonalUnlockAccount personalUnlockAccount = ethClient.personalUnlockAccount(from,password).send();
if (personalUnlockAccount.accountUnlocked())
{
BigInteger gasPrice = Contract.GAS_PRICE;
BigInteger gasLimit = Contract.GAS_LIMIT.divide(new BigInteger("2"));
synchronized(TestLocal.class) {
Transaction transaction = Transaction.createEtherTransaction(from,nonce,gasPrice,gasLimit,to,value);
EthSendTransaction transactionResponse = ethClient.ethSendTransaction(transaction).sendAsync().get();;
if(transactionResponse.hasError()){
String message=transactionResponse.getError().getMessage();
System.out.println("transaction failed,info:"+message);
Utils.writeFile("F:/testErr.txt","transaction failed,info:"+message);
return message;
}else{
String hash=transactionResponse.getTransactionHash();
System.out.println("transaction from "+from+" to "+to+" amount:"+value);
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//writeFile("transaction from "+from+" to "+to+" amount:"+value+" time:"+df.format(new Date()));
return hash;
}
}
}
return null;
}
上面函数中,当转账失败,会将失败结果写入F:/testErr.txt中。
批量转账就是在for循环中连续调用上面这个函数进行转账,现在设置从addr0向addr1连续转账10次:
for(int i=0;i<10;i++)
{
transferEth(addr0,"123",addr1,Convert.toWei("1", Convert.Unit.ETHER).toBigInteger());
}
先查询addr1的余额,有102.9110385个ether:
> web3.formwei(eth.getBalance(eth.accounts[1]))
102.9110385
运行批量转账函数,会发现控制台报错:
查询余额,发现只转成功了一笔:
> web3.formwei(eth.getBalance(eth.accounts[1]))
103.9110385
查看打印的错误信息textErr.txt:
可见失败了9笔交易,只有第一笔交易成功了。失败的信息是因为有交易重复。初步判断是nonce设置出问题了。对于单笔转账,nonce可以从区块链查询到,在for循环里,需要自己去递增nonce。
修改transferEth函数如下:
public String transferEthWith(String from,String password,String to,BigInteger value) throws Exception
{
EthGetTransactionCount ethGetTransactionCount = ethClient.ethGetTransactionCount(
from, DefaultBlockParameterName.LATEST).sendAsync().get();
BigInteger nonce = ethGetTransactionCount.getTransactionCount();
if(gNoce == null)
gNoce = nonce;
PersonalUnlockAccount personalUnlockAccount = ethClient.personalUnlockAccount(from,password).send();
if (personalUnlockAccount.accountUnlocked())
{
BigInteger gasPrice = Contract.GAS_PRICE;
BigInteger gasLimit = Contract.GAS_LIMIT.divide(new BigInteger("2"));
synchronized(TestLocal.class) {
Transaction transaction = Transaction.createEtherTransaction(from,gNoce,gasPrice,gasLimit,to,value);
gNoce = gNoce.add(new BigInteger("1"));
EthSendTransaction transactionResponse = ethClient.ethSendTransaction(transaction).sendAsync().get();;
if(transactionResponse.hasError()){
String message=transactionResponse.getError().getMessage();
System.out.println("transaction failed,info:"+message);
Utils.writeFile("F:/testErr.txt","transaction failed,info:"+message);
return message;
}else{
String hash=transactionResponse.getTransactionHash();
System.out.println("transaction from "+from+" to "+to+" amount:"+value);
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//writeFile("transaction from "+from+" to "+to+" amount:"+value+" time:"+df.format(new Date()));
return hash;
}
}
}
return null;
}
查看geth的log信息,可以看到提交了多笔交易:
查询addr1的账户余额,从103变成113了,转账成功:
> web3.formwei(eth.getBalance(eth.accounts[1]))
113.9110385
到此,关于“web3j批量转账怎么实现”的学习就结束了,希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习,快去试试吧!若想继续学习更多相关知识,请继续关注亿速云网站,小编会继续努力为大家带来更多实用的文章!
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原文链接:https://my.oschina.net/u/2275217/blog/1859245