web3j批量转账怎么实现
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!
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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
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