下载geth节点钱包
wget https://gethstore.blob.core.windows.net/builds/geth-linux-amd64-1.9.14-6d74d1e5.tar.gz
启动配置geth节点钱包
nohup ./geth --datadir "data" --rpc --rpcaddr 0.0.0.0 --rpcport 8545 --rpcapi "web3,eth,net,personal,db,admin" >./geth.log 2>&1 &
进入geth节点钱包控制台
./geth attach data/geth.ipc
maveny依赖
<!-- https://mvnrepository.com/artifact/org.web3j/core -->
<dependency>
<groupId>org.web3j</groupId>
<artifactId>core</artifactId>
<version>4.5.18</version>
</dependency>
上代码
@Data
public class ETHApi {
private static Logger logger = Logger.getLogger(ETHApi.class) ;
private String url ;
private static Web3j web3j ;
private String createAddress ;
private String privatekey ;
public ETHApi(String url) {
this.url = url;
}
public ETHApi(String createAddress, String privatekey) {
this.createAddress = createAddress;
this.privatekey = privatekey;
}
/**
*@描述 获取ETH连接，初始化方法
*@参数 [url, coinDecimal]
*@返回值 EthApi
*@修改人和其它信息
*/
public static ETHApi getInitialization(String url){
try{
web3j = Web3j.build(new HttpService(url));
}catch (Exception e){
e.printStackTrace();
logger.info("虚拟币ETH获取连接失败，错误代码：{}",new Object[]{e.getMessage()});
}
return new ETHApi(url);
}
/**
*@描述 以太坊获取地址余额
*@参数 [address]
*@返回值 double
*@修改人和其它信息
*/
public double getBalance(String address){
double balance = 0.0 ;
try{
EthGetBalance getBalance = web3j.ethGetBalance(address, DefaultBlockParameterName.LATEST).send();
if(!getBalance.hasError()){
String value = getBalance.getBalance().toString();
double valueDouble = Convert.fromWei(value, Convert.Unit.ETHER).doubleValue();
if(valueDouble > 0){
return valueDouble;
}else{
return 0;
}
}else{
return 0;
}
}catch (Exception e){
e.printStackTrace();
logger.info("虚拟币ETH获取余额失败，错误代码：{}",new Object[]{e.getMessage()});
return balance ;
}
}
/**
*@描述 获取以太坊代币余额
*@参数 [fromAddress(代币地址), contractAddress(代币合约地址), decimal(小数位数)]
*@返回值 double
*@修改人和其它信息
*/
public double tokenGetBalance(String fromAddress, String contractAddress, int decimal) {
try
{
String methodName = "balanceOf";
List inputParameters = new ArrayList();
List outputParameters = new ArrayList();
Address address = new Address(fromAddress);
inputParameters.add(address);
TypeReference typeReference = new TypeReference<Uint256>()
{
};
outputParameters.add(typeReference);
Function function = new Function(methodName, inputParameters, outputParameters);
String data = FunctionEncoder.encode(function);
org.web3j.protocol.core.methods.request.Transaction transaction = org.web3j.protocol.core.methods.request.Transaction.createEthCallTransaction(fromAddress, contractAddress, data);
BigInteger balanceValue = BigInteger.ZERO;
try {
EthCall ethCall = (EthCall)this.web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).send();
List results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());
balanceValue = (BigInteger)((Type)results.get(0)).getValue();
} catch (IOException e) {
e.printStackTrace();
}
return BigDecimalUtils.div(new BigDecimal(balanceValue).doubleValue(), Math.pow(10.0D, decimal), 8);
} catch (Exception e) {
logger.info("虚拟币ETH代币获取余额失败，错误代码：{}",new Object[]{e.getMessage()});
e.printStackTrace();
}
return decimal;
}
/**
*@描述 以太坊生成地址
*@参数 [pwd(地址密码)]
*@返回值 EthApi
*@修改人和其它信息
*/
public ETHApi createNewAddress(String pwd){
try{
ObjectMapper objectMapper = ObjectMapperFactory.getObjectMapper();
ECKeyPair ecKeyPair = Keys.createEcKeyPair();
WalletFile walletFile = Wallet.createStandard(pwd, ecKeyPair);
String keystore = objectMapper.writeValueAsString(walletFile);
WalletFile walletFile2 = objectMapper.readValue(keystore, WalletFile.class);
ECKeyPair ecKeyPair1 = Wallet.decrypt(pwd, walletFile2);
return new ETHApi("0x"+walletFile.getAddress(),ecKeyPair1.getPrivateKey().toString(16)) ;
}catch (Exception e){
e.printStackTrace();
logger.info("虚拟币ETH创建地址失败，错误代码：{}",new Object[]{e.getMessage()});
return null ;
}
}
/**
*@描述 ETH 转账
*@参数 [from(转出地址), to(转入地址), amount(转出金额), privateKey(转出地址私钥)]
*@返回值 java.lang.String
*@修改人和其它信息
*/
public String signETHTransaction(String from,String to,String amount,String privateKey){
try{
BigInteger nonce = web3j.ethGetTransactionCount(from, DefaultBlockParameterName.PENDING).send().getTransactionCount();
//支付的矿工费
BigInteger gasPrice = web3j.ethGasPrice().send().getGasPrice();
BigInteger gasLimit = new BigInteger("60000");
BigInteger amountWei = Convert.toWei(amount, Convert.Unit.ETHER).toBigInteger();
//签名交易
RawTransaction rawTransaction = RawTransaction.createTransaction (nonce, gasPrice, gasLimit, to, amountWei, "");
Credentials credentials = Credentials.create(privateKey);
byte[] signMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
//广播交易0
String hash = web3j.ethSendRawTransaction(Numeric.toHexString(signMessage)).sendAsync().get().getTransactionHash();
logger.info("ETH转账,发送方:{"+from+"},接收方:{"+to+"},发送金额:{"+amount+"},hash:{"+hash+"}",new Object[]{from,to,amount,hash});
return hash ;
}catch (Exception e){
e.printStackTrace();
logger.info("虚拟币ETH转账失败，错误代码：{}",new Object[]{e.getMessage()});
return null ;
}
}
/**
* 查询代币精度
*
* @param contractAddress
* @return
*/
public static int getTokenDecimal(String contractAddress) {
String methodName = "decimals";
String fromAddr = "0x0000000000000000000000000000000000000000";
int decimal = 0;
List<Type> inputParameters = new ArrayList<>();
List<TypeReference<?>> outputParameters = new ArrayList<>();
TypeReference<Uint8> typeReference = new TypeReference<Uint8>() {
};
outputParameters.add(typeReference);
Function function = new Function(methodName, inputParameters, outputParameters);
String data = FunctionEncoder.encode(function);
Transaction transaction = Transaction.createEthCallTransaction(fromAddr, contractAddress, data);
EthCall ethCall;
try {
ethCall = web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).sendAsync().get();
List<Type> results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());
decimal = Integer.parseInt(results.get(0).getValue().toString());
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
return decimal;
}
/**
*@描述 eth代币转账
*@参数 [from(代币转出地址), to(代币转入地质), amount(转出金额), privateKey(转出地址私钥), coinAddress(代币合约地址)]
*@返回值 java.lang.String
*@修改人和其它信息
*/
public String signTokenTransaction(String from,String to,String amount,String privateKey,String coinAddress){
try{
BigInteger nonce = web3j.ethGetTransactionCount(from, DefaultBlockParameterName.PENDING).send().getTransactionCount();
//支付的矿工费
BigInteger gasPrice = web3j.ethGasPrice().send().getGasPrice();
BigInteger gasLimit = new BigInteger("60000");
Credentials credentials = Credentials.create(privateKey);
int tokenDecimal = getTokenDecimal(coinAddress);
BigInteger amountWei = null ;
if(tokenDecimal == 6){
amountWei = Convert.toWei(amount, Convert.Unit.MWEI).toBigInteger();
}else{
amountWei = Convert.toWei(amount, Convert.Unit.ETHER).toBigInteger();
}
//封装转账交易
Function function = new Function(
"transfer",
Arrays.<Type>asList(new Address(to),
new org.web3j.abi.datatypes.generated.Uint256(amountWei)),
Collections.<TypeReference<?>>emptyList());
String data = FunctionEncoder.encode(function);
//签名交易
RawTransaction rawTransaction = RawTransaction.createTransaction(nonce, gasPrice, gasLimit, coinAddress, data);
byte[] signMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
//广播交易
String hash = web3j.ethSendRawTransaction(Numeric.toHexString(signMessage)).sendAsync().get().getTransactionHash();
logger.info("ETH代币转账,发送方:{"+from+"},接收方:{"+to+"},发送金额:{"+amount+"},hash:{"+hash+"}",new Object[]{from,to,amount,hash});
return hash ;
}catch (Exception e){
e.printStackTrace();
logger.info("虚拟币ETH代币转账失败，错误代码：{}",new Object[]{e.getMessage()});
return null ;
}
}
/**
*@描述 eth 区块查询
*@参数 [blockNum]
*@返回值 void
*@修改人和其它信息
*/
public List<EthBlock.TransactionResult> getBlock(long scanBlock){
try{
EthBlock.Block block = web3j.ethGetBlockByNumber(DefaultBlockParameter.valueOf(BigInteger.valueOf(scanBlock)), true).send().getBlock();
List<EthBlock.TransactionResult> transactions = block.getTransactions();
return transactions ;
// for (int i = blockNum;i<=blockNumber.intValue();i++){
// logger.info("ETH查询当前区块：{}",new Object[]{i});
// EthBlock.Block block = web3j.ethGetBlockByNumber(DefaultBlockParameter.valueOf(BigInteger.valueOf(blockNum)), true).send().getBlock();
// List<EthBlock.TransactionResult> transactions = block.getTransactions();
// for (EthBlock.TransactionResult transactionResult:transactions) {
// if(transactionResult instanceof EthBlock.TransactionObject){
// EthBlock.TransactionObject tx = (EthBlock.TransactionObject)transactionResult ;
// String blockHash = tx.getHash() ;
// String from = tx.getFrom();
// String to = tx.getTo();
// String input = tx.getInput();
// BigInteger gas = tx.getGas();
// System.out.println("from:"+from);
// System.out.println("to:"+to);
// System.out.println("gas:"+gas);
// System.out.println("hash:"+blockHash);
// System.out.println("input:"+input);
// }
// }
// }
}catch (Exception e){
e.printStackTrace();
logger.info("虚拟币ETH查询区块记录错误，错误代码：{"+e.getMessage()+"}",new Object[]{e.getMessage()});
}throw new RuntimeException() ;
}
/**
*@描述 获取hash转账状态
*@参数 [hash]
*@返回值 boolean
*@修改人和其它信息
*/
public boolean getHashStatus(String hash){
boolean flag = true ;
try{
EthGetTransactionReceipt send = web3j.ethGetTransactionReceipt(hash).send();
String status = send.getResult().getStatus();
BigInteger integer = Numeric.decodeQuantity(status);
BigInteger bigInteger = new BigInteger("1");
if(bigInteger.compareTo(integer) == 0){
flag = false ;
return flag ;
}
return flag ;
}catch (Exception e){
logger.info("获取hash转账状态失败！");
}
return flag ;
}
}
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下载geth节点钱包
wget https://gethstore.blob.core.windo
阅读背景：
Java对接geth节点钱包以及部署geth节点钱包（离线签名）
来源：互联网
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