geth的java开发之使用web3j_org.web3j.abi.functionencoder maven

maven引用geth的web3j包

		<dependency>
			<groupId>org.web3j</groupId>
			<artifactId>core</artifactId>
			<version>3.2.0</version>
		</dependency>
1
2
3
4
5

/**
 * 对geth节点的操作
 */

import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.ExecutionException;

import org.apache.log4j.Logger;
import org.web3j.abi.FunctionEncoder;
import org.web3j.abi.FunctionReturnDecoder;
import org.web3j.abi.TypeReference;
import org.web3j.abi.datatypes.Address;
import org.web3j.abi.datatypes.Bool;
import org.web3j.abi.datatypes.Function;
import org.web3j.abi.datatypes.Type;
import org.web3j.abi.datatypes.Utf8String;
import org.web3j.abi.datatypes.generated.Uint256;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.admin.Admin;
import org.web3j.protocol.admin.methods.response.BooleanResponse;
import org.web3j.protocol.admin.methods.response.NewAccountIdentifier;
import org.web3j.protocol.admin.methods.response.PersonalUnlockAccount;
import org.web3j.protocol.core.DefaultBlockParameter;
import org.web3j.protocol.core.DefaultBlockParameterName;
import org.web3j.protocol.core.DefaultBlockParameterNumber;
import org.web3j.protocol.core.Request;
import org.web3j.protocol.core.methods.request.Transaction;
import org.web3j.protocol.core.methods.response.EthAccounts;
import org.web3j.protocol.core.methods.response.EthBlock;
import org.web3j.protocol.core.methods.response.EthBlockNumber;
import org.web3j.protocol.core.methods.response.EthCall;
import org.web3j.protocol.core.methods.response.EthEstimateGas;
import org.web3j.protocol.core.methods.response.EthGasPrice;
import org.web3j.protocol.core.methods.response.EthGetBalance;
import org.web3j.protocol.core.methods.response.EthGetTransactionCount;
import org.web3j.protocol.core.methods.response.EthGetTransactionReceipt;
import org.web3j.protocol.core.methods.response.EthSendTransaction;
import org.web3j.protocol.core.methods.response.EthTransaction;
import org.web3j.protocol.core.methods.response.TransactionReceipt;
import org.web3j.protocol.core.methods.response.Web3ClientVersion;
import org.web3j.protocol.geth.Geth;
import org.web3j.protocol.http.HttpService;
import org.web3j.utils.Convert;




public class EthService {
	
	/**
	* geth节点可调用的json-rpc接口地址和端口
	*/
	private static final String URL = "http://192.168.1.88:8545";//你的全节点服务器，挖矿节点

	private static final String PASSWORD = "yourpassword";//公共私钥的密码，不安全，最好每个账号设置一个
	
//	private static final  String contractAddress ="0x8279c18240f1b0354093c0dfbf8d7577156da712";//以太坊发布的合约地址
	
//	BigInteger nonce = web3j.ethGetTransactionCount(address , DefaultBlockParameterName.PENDING).send().getTransactionCount();
	
	private final static Logger logger = Logger.getLogger(EthService.class);
	
	private static  String clientVersion = null;
	
	static {
		Web3j web3 = initWeb3j();
		try {
		  Web3ClientVersion	web3ClientVersion = web3.web3ClientVersion().send();
		  clientVersion = web3ClientVersion.getWeb3ClientVersion();//连接测试
		} catch (Exception e) {
		  e.printStackTrace();
		}finally {
			web3.shutdown();
		}
	}
	/**
	* 通过http连接到geth节点
	* @return
	*/
	private static HttpService getService(){
		HttpService service =	new HttpService(URL);
		service.addHeader("connection","close");
		return service;
	}

	/**
	* 初始化web3j普通api调用
	* @return web3j
	*/
	public static Web3j initWeb3j() {
		return Web3j.build(getService());
	}
	
	/**
	* 初始化personal级别的操作对象
	* @return Geth
	*/
	public static Geth initGeth(){
		return Geth.build(getService());
	}
	
	/**
	* 初始化admin级别操作的对象
	* @return Admin
	*/
	public static Admin initAdmin(){
		return Admin.build(getService());
	}
	
	/**
	* 创建地址 Ethereum: 
	* @param password 密码（建议同一个平台的地址使用一个相同的，且复杂度较高的密码）
	* @return 地址hash
	* @throws IOException
	*/
	public static String newAccount() throws IOException {
		 try {
			Admin admin = initAdmin();
			Request<?, NewAccountIdentifier> request = admin.personalNewAccount(PASSWORD);
			NewAccountIdentifier result = request.send();
			return result.getAccountId();
		 } catch (IOException e) {
			e.printStackTrace();
			return null;
		 }
	}
	

	/**
	* 已创建的用户地址数组
	* @return 地址数组
	* @throws IOException
	*/
	public static List<String> getAccounts() throws IOException {
		Web3j web3 = initWeb3j();		
		Request<?, EthAccounts> request = web3.ethAccounts();
		EthAccounts result = request.send();
		return result.getAccounts();
	}
	
	/**
	* 解锁账户，发送交易前需要对账户进行解锁
	* @param address 地址
	* @param password 密码
	* @param duration 解锁有效时间，单位秒
	* @return
	* @throws IOException
	*/
	public static Boolean unlockAccount(String address, BigInteger duration) throws IOException {
		Admin admin = initAdmin();
		Request<?, PersonalUnlockAccount> request = admin.personalUnlockAccount(address, PASSWORD, duration);
		PersonalUnlockAccount account = request.send();
		return account.accountUnlocked();
	}
	
	/**
	* 获得账户余额eth
	* @param address 密码
	* @return 余额数量
	*/
	public static BigDecimal getBalance(String address) {
		Web3j web3j = initWeb3j();
        try {
            EthGetBalance ethGetBalance = web3j.ethGetBalance(address, DefaultBlockParameterName.LATEST).send();
            return Convert.fromWei(new BigDecimal(ethGetBalance.getBalance()),Convert.Unit.ETHER);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }finally {
        	web3j.shutdown();
        }
    }
	
	
	/**
	* 获得代币账户余额
	* @param address 密码
	* @return 余额数量
	*/
	public static BigDecimal getTokenBalance(String fromAddress) {
		Web3j web3j = initWeb3j();		
        List<Type> inputParameters = new ArrayList<Type>();
        inputParameters.add(new Address(fromAddress));
        List<TypeReference<?>> outputParameters = new ArrayList<TypeReference<?>>();    
        outputParameters.add(new TypeReference<Uint256>() {});
        Function function = new Function("balanceOf",inputParameters,outputParameters);
        String data = FunctionEncoder.encode(function);
        Transaction transaction = Transaction.createEthCallTransaction(fromAddress, contractAddress, data);
        EthCall ethCall;
        BigInteger balanceValue = BigInteger.ZERO;
        try {
            ethCall = web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).send();
            List<Type> results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());
            balanceValue = (BigInteger) results.get(0).getValue();
            return  Convert.fromWei(new BigDecimal(balanceValue),Convert.Unit.ETHER);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }finally {
        	web3j.shutdown();
        }
       
    }
	
	/**
	 * 查询代币名称
	 * @param web3j
	 * @param contractAddress
	 * @return
	 */
	public static String getTokenName(String contractAddress) {
		Web3j web3j = initWeb3j();		
		String methodName = "name";
		String name = null;
		String fromAddr = emptyAddress;
		List<Type> inputParameters = new ArrayList<>();
		List<TypeReference<?>> outputParameters = new ArrayList<>();
		TypeReference<Utf8String> typeReference = new TypeReference<Utf8String>() {};
		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());
			name = results.get(0).getValue().toString();
			return name;
		} catch (InterruptedException | ExecutionException e) {
			e.printStackTrace();
			return name;
		}finally {
        	web3j.shutdown();
        }
		
	}
	
	/**
	* 获得当前区块高度
	* @return 当前区块高度
	* @throws IOException
	*/
	public static BigInteger getCurrentBlockNumber() throws IOException {
		Web3j web3j = initWeb3j();
		Request<?, EthBlockNumber>request = web3j.ethBlockNumber();
		return request.send().getBlockNumber();
	}
	
	/**
	* 账户解锁，使用完成之后需要锁定
	* @param address
	* @return
	* @throws IOException
	*/
	public static Boolean lockAccount(String address) throws IOException {
		Geth geth = initGeth();
		Request<?, BooleanResponse> request = geth.personalLockAccount(address);
		BooleanResponse response = request.send();
		return response.success();
	}
	
	
	/**
	* 获得ethblock
	* @param blockNumber 根据区块编号
	* @return
	* @throws IOException
	*/
	public static EthBlock getBlockEthBlock(Integer blockNumber) throws IOException {
		Web3j web3j = initWeb3j();
		DefaultBlockParameter defaultBlockParameter = new DefaultBlockParameterNumber(blockNumber);
		Request<?, EthBlock> request = web3j.ethGetBlockByNumber(defaultBlockParameter, true);
		EthBlock ethBlock = request.send();
		return ethBlock;
	}
	
	/**
	* eth发送交易并获得交易hash值
	* @param transaction
	*/
	public static String sendTransaction(String from,String to,BigInteger gasPrice,BigInteger value) throws IOException{
		Web3j web3j = initWeb3j();
		try {
			boolean unlockAccount = unlockAccount(from,BigInteger.valueOf(10));
			if (unlockAccount) {
				EthGetTransactionCount ethGetTransactionCount = null;
				ethGetTransactionCount = web3j.ethGetTransactionCount(from, DefaultBlockParameterName.PENDING).sendAsync().get();
				BigInteger nonce = ethGetTransactionCount.getTransactionCount();
				Transaction transaction = new Transaction(from,nonce,gasPrice,BigInteger.valueOf(60000),to,value,null);
				Request<?, EthSendTransaction> request = web3j.ethSendTransaction(transaction);
				EthSendTransaction ethSendTransaction = request.send();
				String txHash =ethSendTransaction.getTransactionHash();
				return  txHash;
			}else{
				return null;
			}
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		} catch (ExecutionException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}finally {
        	web3j.shutdown();
        }
	}
		
	//gas值账代币
	public static String transferToken(String fromAddr, String toAddr, BigInteger gasPrice, BigInteger amount) {
		String txHash = null;
		Web3j web3j = initWeb3j();
		Geth admin = initGeth();
		try {
			PersonalUnlockAccount personalUnlockAccount = admin.personalUnlockAccount(
					fromAddr, PASSWORD, BigInteger.valueOf(10)).send();
			if (personalUnlockAccount.accountUnlocked()) {
				List<Type> inputParameters = new ArrayList<>();
				inputParameters.add(new Address(toAddr));
				inputParameters.add(new Uint256(amount));
				List<TypeReference<?>> outputParameters = new ArrayList<>();
				outputParameters.add(new TypeReference<Bool>() {});
				Function function = new Function("transfer", inputParameters, outputParameters);
				String data = FunctionEncoder.encode(function);
				EthGetTransactionCount ethGetTransactionCount = web3j.ethGetTransactionCount(fromAddr, DefaultBlockParameterName.PENDING).sendAsync().get();
				BigInteger nonce = ethGetTransactionCount.getTransactionCount();
				// 获得eth余额
		        BigDecimal ethBalance = getBalance(fromAddr);
		        BigInteger balance = Convert.toWei(ethBalance, Convert.Unit.ETHER).toBigInteger();
		    	// 获得代币余额
		        BigDecimal tokenBalance = getTokenBalance(fromAddr);
		        BigInteger uencBlock = Convert.toWei(tokenBalance, Convert.Unit.ETHER).toBigInteger();
		        BigInteger gasLimit =BigInteger.valueOf(60000);
		        if (balance.compareTo(gasLimit) < 0) {
		            throw new RuntimeException("手续费不足，请核实");
		        }
		        if (uencBlock.compareTo(amount) < 0) {
		            throw new RuntimeException("代币不足，请核实");
		        }
		        Transaction transaction = Transaction.createFunctionCallTransaction(fromAddr, nonce, gasPrice,
		        		gasLimit, contractAddress, data);
				//不是必须的 可以使用默认值
				EthSendTransaction ethSendTransaction = web3j.ethSendTransaction(transaction).sendAsync().get();
				txHash = ethSendTransaction.getTransactionHash();
				return txHash;
			}
		} catch (Exception e) {
			e.printStackTrace();
			return txHash;
		}finally {
        	web3j.shutdown();
        }
		return txHash;
		
    }
		
	/**
	 * 代币转账
	 */
	public static  String sendTokenTransaction(String fromAddress, String toAddress, BigInteger gasPrice, BigInteger amount) {
		String txHash = null;
		Web3j web3j = initWeb3j();
		Geth admin = initGeth();
		try {
			PersonalUnlockAccount personalUnlockAccount = admin.personalUnlockAccount(fromAddress, PASSWORD, BigInteger.valueOf(10)).send();
			if (personalUnlockAccount.accountUnlocked()) {
				Request<?, EthGasPrice> ethGasPrice = web3j.ethGasPrice();
//				BigInteger gasPrice =ethGasPrice.send().getGasPrice();//交易的gas价格，默认是网络gas价格的平均值
				List<Type> inputParameters = new ArrayList<>();
				inputParameters.add(new Address(toAddress));
				inputParameters.add(new Uint256(amount));
				List<TypeReference<?>> outputParameters = new ArrayList<>();
				outputParameters.add(new TypeReference<Bool>() {});
				Function function = new Function("transfer", inputParameters, outputParameters);
				String data = FunctionEncoder.encode(function);
				EthGetTransactionCount ethGetTransactionCount = web3j
						.ethGetTransactionCount(fromAddress, DefaultBlockParameterName.PENDING).sendAsync().get();
				BigInteger nonce = ethGetTransactionCount.getTransactionCount();
				// 获得eth余额
		        BigDecimal ethBalance = getBalance(fromAddress);
		        BigInteger balance = Convert.toWei(ethBalance, Convert.Unit.ETHER).toBigInteger();//转换过单位
		    	// 获得代币余额
		        BigDecimal tokenBalance = getTokenBalance(fromAddress);		       
		        BigInteger uencBlock = Convert.toWei(tokenBalance, Convert.Unit.ETHER).toBigInteger(); 
		        Transaction transaction = Transaction.createFunctionCallTransaction(fromAddress, nonce, gasPrice,
						BigInteger.valueOf(60000), contractAddress, data);
				if (gasPrice.compareTo(balance) > 0) {
		            throw new RuntimeException("手续费不足，请核实");
		        }
		        if (amount.compareTo(uencBlock) > 0) {
		            throw new RuntimeException("代币不足，请核实");
		        }
				transaction = Transaction.createFunctionCallTransaction(fromAddress, nonce, gasPrice,
						BigInteger.valueOf(60000), contractAddress, data);
				//不是必须的 可以使用默认值
				EthSendTransaction ethSendTransaction = web3j.ethSendTransaction(transaction).sendAsync().get();
				txHash = ethSendTransaction.getTransactionHash();
				return txHash;
			}
			
		} catch (Exception e) {
			e.printStackTrace();
			logger.error("交易异常");
			 return txHash;
		}finally {
        	web3j.shutdown();
        }
		return txHash;

	}

	
	//估计手续上限Transaction transaction
	public static BigInteger getGasPrice() {
		Web3j web3j= initWeb3j();
        try {
			Request<?, EthGasPrice> ethGasPrice = web3j.ethGasPrice();
			BigInteger gasPrice =ethGasPrice.send().getGasPrice();//交易的gas价格，默认是网络gas价格的平均值
            return gasPrice;
        } catch (IOException e) {
            throw new RuntimeException("net error");
        }
    }

	/**
	* 指定地址发送交易所需nonce获取
	* @param address 待发送交易地址
	* @return
	* @throws IOException
	*/
	public static BigInteger getNonce(String address) throws IOException {
		Web3j web3j = initWeb3j();
		Request<?, EthGetTransactionCount> request = web3j.ethGetTransactionCount(address, DefaultBlockParameterName.LATEST);
		return request.send().getTransactionCount();
	}
	
	/**
	* 获得交易的信息
	* @param hash 交易的hash值
	* @return
	* @throws IOException
	*/
	public static Optional<TransactionReceipt> getReceipt(String hash) throws IOException {
		Web3j web3j = initWeb3j();
		Request<?, EthGetTransactionReceipt> request = web3j.ethGetTransactionReceipt(hash);
		Optional<TransactionReceipt> optional = request.send().getTransactionReceipt();
		if(!Optional.empty().equals(optional)) {
			logger.error("交易：optional:"+optional);
		}
		return optional;
	}
	
	/**
	 * 
	* 根据hash值获取交易
	* @param hash
	* @return
	* @throws IOException
	*/
	public static EthTransaction getTransactionByHash(String hash) throws IOException {
		Web3j web3j = initWeb3j();
		Request<?, EthTransaction> request = web3j.ethGetTransactionByHash(hash);
		return request.send();
	}
	
	
	//初始化单位
	public static String initWei(BigInteger gasMun) {
		BigInteger wei = new BigInteger("1000000000000000000");
		BigInteger[] remainder = gasMun.divideAndRemainder(wei);
		return remainder[0]+"."+remainder[1];
	}
	
	//初始化单位
	public String toDecimal(int decimal, BigInteger integer) {
		StringBuffer sbf = new StringBuffer("1"); 
		for(int i = 0; i < decimal; i++) { 
			sbf.append("0"); 
		} 
		String balance = new BigDecimal(integer).divide(new BigDecimal(sbf.toString()), 18, BigDecimal.ROUND_DOWN).toPlainString(); 
		return balance; 
	}
	
	public static void main(String[] agrs) throws IOException{

//		BigInteger gasPrice = getGasPrice();
//		System.out.println(gasPrice);
//		BigInteger value = getGasPrice();
//		System.out.println(value);
		//创建账户
//		String account=  newAccount();
//		System.out.println(account.toString());
//		查询所有钱包地址
//		List<String> accounts= getAccounts();
//		System.out.println(accounts.toString());
//		查询eth金额
//		BigDecimal d2 =getBalance("0x5e6fe581d629731088ceb7cd30c23317399b25a9");
//		System.out.println(d2);
		查询代币金额
//		BigDecimal detail2 =getTokenBalance("0x5e6fe581d629731088ceb7cd30c23317399b25a9");
//		System.out.println(detail2);

}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510