deploy = TokenERC20.deploy(web3j, credentials,
+ Convert.toWei("10", Convert.Unit.GWEI).toBigInteger(),
+ BigInteger.valueOf(3000000),
+ BigInteger.valueOf(5201314),
+ "my token", "mt");
+ try {
+ TokenERC20 tokenERC20 = deploy.send();
+ tokenERC20.isValid();
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ }
+
+ private static void use() {
+ Web3j web3j = Web3j.build(new HttpService(Environment.RPC_URL));
+ String contractAddress = null;
+ Credentials credentials = null;//可以根据私钥生成
+ TokenERC20 contract = TokenERC20.load(contractAddress, web3j, credentials,
+ Convert.toWei("10", Convert.Unit.GWEI).toBigInteger(),
+ BigInteger.valueOf(100000));
+ String myAddress = null;
+ String toAddress = null;
+ BigInteger amount = BigInteger.ONE;
+ try {
+ BigInteger balance = contract.balanceOf(myAddress).send();
+ TransactionReceipt receipt = contract.transfer(toAddress, amount).send();
+ //etc..
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+}
diff --git a/src/main/java/com/ethjava/sol/TokenERC20.java b/src/main/java/com/ethjava/sol/TokenERC20.java
new file mode 100644
index 0000000..98b4064
--- /dev/null
+++ b/src/main/java/com/ethjava/sol/TokenERC20.java
@@ -0,0 +1,287 @@
+package com.ethjava.sol;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import org.web3j.abi.EventEncoder;
+import org.web3j.abi.FunctionEncoder;
+import org.web3j.abi.TypeReference;
+import org.web3j.abi.datatypes.Address;
+import org.web3j.abi.datatypes.Event;
+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.abi.datatypes.generated.Uint8;
+import org.web3j.crypto.Credentials;
+import org.web3j.protocol.Web3j;
+import org.web3j.protocol.core.DefaultBlockParameter;
+import org.web3j.protocol.core.RemoteCall;
+import org.web3j.protocol.core.methods.request.EthFilter;
+import org.web3j.protocol.core.methods.response.Log;
+import org.web3j.protocol.core.methods.response.TransactionReceipt;
+import org.web3j.tx.Contract;
+import org.web3j.tx.TransactionManager;
+import rx.Observable;
+import rx.functions.Func1;
+
+/**
+ * Auto generated code.
+ *
Do not modify!
+ *
Please use the web3j command line tools,
+ * or the org.web3j.codegen.SolidityFunctionWrapperGenerator in the
+ * codegen module to update.
+ *
+ *
Generated with web3j version 3.4.0.
+ */
+public class TokenERC20 extends Contract {
+ private static final String BINARY = "60806040526002805460ff1916601217905534801561001d57600080fd5b506040516109c63803806109c683398101604090815281516020808401518385015160025460ff16600a0a84026003819055336000908152600485529586205590850180519395909491019261007592850190610092565b508051610089906001906020840190610092565b5050505061012d565b828054600181600116156101000203166002900490600052602060002090601f016020900481019282601f106100d357805160ff1916838001178555610100565b82800160010185558215610100579182015b828111156101005782518255916020019190600101906100e5565b5061010c929150610110565b5090565b61012a91905b8082111561010c5760008155600101610116565b90565b61088a8061013c6000396000f3006080604052600436106100b95763ffffffff7c010000000000000000000000000000000000000000000000000000000060003504166306fdde0381146100be578063095ea7b31461014857806318160ddd1461018057806323b872dd146101a7578063313ce567146101d157806342966c68146101fc57806370a082311461021457806379cc67901461023557806395d89b4114610259578063a9059cbb1461026e578063cae9ca5114610294578063dd62ed3e146102fd575b600080fd5b3480156100ca57600080fd5b506100d3610324565b6040805160208082528351818301528351919283929083019185019080838360005b8381101561010d5781810151838201526020016100f5565b50505050905090810190601f16801561013a5780820380516001836020036101000a031916815260200191505b509250505060405180910390f35b34801561015457600080fd5b5061016c600160a060020a03600435166024356103b2565b604080519115158252519081900360200190f35b34801561018c57600080fd5b506101956103df565b60408051918252519081900360200190f35b3480156101b357600080fd5b5061016c600160a060020a03600435811690602435166044356103e5565b3480156101dd57600080fd5b506101e6610454565b6040805160ff9092168252519081900360200190f35b34801561020857600080fd5b5061016c60043561045d565b34801561022057600080fd5b50610195600160a060020a03600435166104d5565b34801561024157600080fd5b5061016c600160a060020a03600435166024356104e7565b34801561026557600080fd5b506100d36105b8565b34801561027a57600080fd5b50610292600160a060020a0360043516602435610612565b005b3480156102a057600080fd5b50604080516020600460443581810135601f810184900484028501840190955284845261016c948235600160a060020a03169460248035953695946064949201919081908401838280828437509497506106219650505050505050565b34801561030957600080fd5b50610195600160a060020a036004358116906024351661073a565b6000805460408051602060026001851615610100026000190190941693909304601f810184900484028201840190925281815292918301828280156103aa5780601f1061037f576101008083540402835291602001916103aa565b820191906000526020600020905b81548152906001019060200180831161038d57829003601f168201915b505050505081565b336000908152600560209081526040808320600160a060020a039590951683529390529190912055600190565b60035481565b600160a060020a038316600090815260056020908152604080832033845290915281205482111561041557600080fd5b600160a060020a038416600090815260056020908152604080832033845290915290208054839003905561044a848484610757565b5060019392505050565b60025460ff1681565b3360009081526004602052604081205482111561047957600080fd5b3360008181526004602090815260409182902080548690039055600380548690039055815185815291517fcc16f5dbb4873280815c1ee09dbd06736cffcc184412cf7a71a0fdb75d397ca59281900390910190a2506001919050565b60046020526000908152604090205481565b600160a060020a03821660009081526004602052604081205482111561050c57600080fd5b600160a060020a038316600090815260056020908152604080832033845290915290205482111561053c57600080fd5b600160a060020a0383166000818152600460209081526040808320805487900390556005825280832033845282529182902080548690039055600380548690039055815185815291517fcc16f5dbb4873280815c1ee09dbd06736cffcc184412cf7a71a0fdb75d397ca59281900390910190a250600192915050565b60018054604080516020600284861615610100026000190190941693909304601f810184900484028201840190925281815292918301828280156103aa5780601f1061037f576101008083540402835291602001916103aa565b61061d338383610757565b5050565b60008361062e81856103b2565b15610732576040517f8f4ffcb10000000000000000000000000000000000000000000000000000000081523360048201818152602483018790523060448401819052608060648501908152875160848601528751600160a060020a03871695638f4ffcb195948b94938b939192909160a490910190602085019080838360005b838110156106c65781810151838201526020016106ae565b50505050905090810190601f1680156106f35780820380516001836020036101000a031916815260200191505b5095505050505050600060405180830381600087803b15801561071557600080fd5b505af1158015610729573d6000803e3d6000fd5b50505050600191505b509392505050565b600560209081526000928352604080842090915290825290205481565b6000600160a060020a038316151561076e57600080fd5b600160a060020a03841660009081526004602052604090205482111561079357600080fd5b600160a060020a038316600090815260046020526040902054828101116107b957600080fd5b50600160a060020a038083166000818152600460209081526040808320805495891680855282852080548981039091559486905281548801909155815187815291519390950194927fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef929181900390910190a3600160a060020a0380841660009081526004602052604080822054928716825290205401811461085857fe5b505050505600a165627a7a72305820a699795c1a251457c903be9b4228f16928a18279fb1c6adc9eadefb8a46ae9060029";
+
+ public static final String FUNC_NAME = "name";
+
+ public static final String FUNC_APPROVE = "approve";
+
+ public static final String FUNC_TOTALSUPPLY = "totalSupply";
+
+ public static final String FUNC_TRANSFERFROM = "transferFrom";
+
+ public static final String FUNC_DECIMALS = "decimals";
+
+ public static final String FUNC_BURN = "burn";
+
+ public static final String FUNC_BALANCEOF = "balanceOf";
+
+ public static final String FUNC_BURNFROM = "burnFrom";
+
+ public static final String FUNC_SYMBOL = "symbol";
+
+ public static final String FUNC_TRANSFER = "transfer";
+
+ public static final String FUNC_APPROVEANDCALL = "approveAndCall";
+
+ public static final String FUNC_ALLOWANCE = "allowance";
+
+ public static final Event TRANSFER_EVENT = new Event("Transfer",
+ Arrays.>asList(new TypeReference(true) {}, new TypeReference(true) {},new TypeReference(false) {}));
+ ;
+
+ public static final Event BURN_EVENT = new Event("Burn",
+ Arrays.>asList(new TypeReference(true) {},new TypeReference(false) {}));
+ ;
+
+ protected TokenERC20(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
+ super(BINARY, contractAddress, web3j, credentials, gasPrice, gasLimit);
+ }
+
+ protected TokenERC20(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
+ super(BINARY, contractAddress, web3j, transactionManager, gasPrice, gasLimit);
+ }
+
+ public RemoteCall name() {
+ final Function function = new Function(FUNC_NAME,
+ Arrays.asList(),
+ Arrays.>asList(new TypeReference() {}));
+ return executeRemoteCallSingleValueReturn(function, String.class);
+ }
+
+ public RemoteCall approve(String _spender, BigInteger _value) {
+ final Function function = new Function(
+ FUNC_APPROVE,
+ Arrays.asList(new Address(_spender),
+ new Uint256(_value)),
+ Collections.>emptyList());
+ return executeRemoteCallTransaction(function);
+ }
+
+ public RemoteCall totalSupply() {
+ final Function function = new Function(FUNC_TOTALSUPPLY,
+ Arrays.asList(),
+ Arrays.>asList(new TypeReference() {}));
+ return executeRemoteCallSingleValueReturn(function, BigInteger.class);
+ }
+
+ public RemoteCall transferFrom(String _from, String _to, BigInteger _value) {
+ final Function function = new Function(
+ FUNC_TRANSFERFROM,
+ Arrays.asList(new Address(_from),
+ new Address(_to),
+ new Uint256(_value)),
+ Collections.>emptyList());
+ return executeRemoteCallTransaction(function);
+ }
+
+ public RemoteCall decimals() {
+ final Function function = new Function(FUNC_DECIMALS,
+ Arrays.asList(),
+ Arrays.>asList(new TypeReference() {}));
+ return executeRemoteCallSingleValueReturn(function, BigInteger.class);
+ }
+
+ public RemoteCall burn(BigInteger _value) {
+ final Function function = new Function(
+ FUNC_BURN,
+ Arrays.asList(new Uint256(_value)),
+ Collections.>emptyList());
+ return executeRemoteCallTransaction(function);
+ }
+
+ public RemoteCall balanceOf(String param0) {
+ final Function function = new Function(FUNC_BALANCEOF,
+ Arrays.asList(new Address(param0)),
+ Arrays.>asList(new TypeReference() {}));
+ return executeRemoteCallSingleValueReturn(function, BigInteger.class);
+ }
+
+ public RemoteCall burnFrom(String _from, BigInteger _value) {
+ final Function function = new Function(
+ FUNC_BURNFROM,
+ Arrays.asList(new Address(_from),
+ new Uint256(_value)),
+ Collections.>emptyList());
+ return executeRemoteCallTransaction(function);
+ }
+
+ public RemoteCall symbol() {
+ final Function function = new Function(FUNC_SYMBOL,
+ Arrays.asList(),
+ Arrays.>asList(new TypeReference() {}));
+ return executeRemoteCallSingleValueReturn(function, String.class);
+ }
+
+ public RemoteCall transfer(String _to, BigInteger _value) {
+ final Function function = new Function(
+ FUNC_TRANSFER,
+ Arrays.asList(new Address(_to),
+ new Uint256(_value)),
+ Collections.>emptyList());
+ return executeRemoteCallTransaction(function);
+ }
+
+ public RemoteCall approveAndCall(String _spender, BigInteger _value, byte[] _extraData) {
+ final Function function = new Function(
+ FUNC_APPROVEANDCALL,
+ Arrays.asList(new Address(_spender),
+ new Uint256(_value),
+ new org.web3j.abi.datatypes.DynamicBytes(_extraData)),
+ Collections.>emptyList());
+ return executeRemoteCallTransaction(function);
+ }
+
+ public RemoteCall allowance(String param0, String param1) {
+ final Function function = new Function(FUNC_ALLOWANCE,
+ Arrays.asList(new Address(param0),
+ new Address(param1)),
+ Arrays.>asList(new TypeReference() {}));
+ return executeRemoteCallSingleValueReturn(function, BigInteger.class);
+ }
+
+ public static RemoteCall deploy(Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit, BigInteger initialSupply, String tokenName, String tokenSymbol) {
+ String encodedConstructor = FunctionEncoder.encodeConstructor(Arrays.asList(new Uint256(initialSupply),
+ new Utf8String(tokenName),
+ new Utf8String(tokenSymbol)));
+ return deployRemoteCall(TokenERC20.class, web3j, credentials, gasPrice, gasLimit, BINARY, encodedConstructor);
+ }
+
+ public static RemoteCall deploy(Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit, BigInteger initialSupply, String tokenName, String tokenSymbol) {
+ String encodedConstructor = FunctionEncoder.encodeConstructor(Arrays.asList(new Uint256(initialSupply),
+ new Utf8String(tokenName),
+ new Utf8String(tokenSymbol)));
+ return deployRemoteCall(TokenERC20.class, web3j, transactionManager, gasPrice, gasLimit, BINARY, encodedConstructor);
+ }
+
+ public List getTransferEvents(TransactionReceipt transactionReceipt) {
+ List valueList = extractEventParametersWithLog(TRANSFER_EVENT, transactionReceipt);
+ ArrayList responses = new ArrayList(valueList.size());
+ for (EventValuesWithLog eventValues : valueList) {
+ TransferEventResponse typedResponse = new TransferEventResponse();
+ typedResponse.log = eventValues.getLog();
+ typedResponse.from = (String) eventValues.getIndexedValues().get(0).getValue();
+ typedResponse.to = (String) eventValues.getIndexedValues().get(1).getValue();
+ typedResponse.value = (BigInteger) eventValues.getNonIndexedValues().get(0).getValue();
+ responses.add(typedResponse);
+ }
+ return responses;
+ }
+
+ public Observable transferEventObservable(EthFilter filter) {
+ return web3j.ethLogObservable(filter).map(new Func1() {
+ @Override
+ public TransferEventResponse call(Log log) {
+ EventValuesWithLog eventValues = extractEventParametersWithLog(TRANSFER_EVENT, log);
+ TransferEventResponse typedResponse = new TransferEventResponse();
+ typedResponse.log = log;
+ typedResponse.from = (String) eventValues.getIndexedValues().get(0).getValue();
+ typedResponse.to = (String) eventValues.getIndexedValues().get(1).getValue();
+ typedResponse.value = (BigInteger) eventValues.getNonIndexedValues().get(0).getValue();
+ return typedResponse;
+ }
+ });
+ }
+
+ public Observable transferEventObservable(DefaultBlockParameter startBlock, DefaultBlockParameter endBlock) {
+ EthFilter filter = new EthFilter(startBlock, endBlock, getContractAddress());
+ filter.addSingleTopic(EventEncoder.encode(TRANSFER_EVENT));
+ return transferEventObservable(filter);
+ }
+
+ public List getBurnEvents(TransactionReceipt transactionReceipt) {
+ List valueList = extractEventParametersWithLog(BURN_EVENT, transactionReceipt);
+ ArrayList responses = new ArrayList(valueList.size());
+ for (EventValuesWithLog eventValues : valueList) {
+ BurnEventResponse typedResponse = new BurnEventResponse();
+ typedResponse.log = eventValues.getLog();
+ typedResponse.from = (String) eventValues.getIndexedValues().get(0).getValue();
+ typedResponse.value = (BigInteger) eventValues.getNonIndexedValues().get(0).getValue();
+ responses.add(typedResponse);
+ }
+ return responses;
+ }
+
+ public Observable burnEventObservable(EthFilter filter) {
+ return web3j.ethLogObservable(filter).map(new Func1() {
+ @Override
+ public BurnEventResponse call(Log log) {
+ EventValuesWithLog eventValues = extractEventParametersWithLog(BURN_EVENT, log);
+ BurnEventResponse typedResponse = new BurnEventResponse();
+ typedResponse.log = log;
+ typedResponse.from = (String) eventValues.getIndexedValues().get(0).getValue();
+ typedResponse.value = (BigInteger) eventValues.getNonIndexedValues().get(0).getValue();
+ return typedResponse;
+ }
+ });
+ }
+
+ public Observable burnEventObservable(DefaultBlockParameter startBlock, DefaultBlockParameter endBlock) {
+ EthFilter filter = new EthFilter(startBlock, endBlock, getContractAddress());
+ filter.addSingleTopic(EventEncoder.encode(BURN_EVENT));
+ return burnEventObservable(filter);
+ }
+
+ public static TokenERC20 load(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
+ return new TokenERC20(contractAddress, web3j, credentials, gasPrice, gasLimit);
+ }
+
+ public static TokenERC20 load(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
+ return new TokenERC20(contractAddress, web3j, transactionManager, gasPrice, gasLimit);
+ }
+
+ public static class TransferEventResponse {
+ public Log log;
+
+ public String from;
+
+ public String to;
+
+ public BigInteger value;
+ }
+
+ public static class BurnEventResponse {
+ public Log log;
+
+ public String from;
+
+ public BigInteger value;
+ }
+}
diff --git a/src/main/java/com/ethjava/sol/erc20_example.sol b/src/main/java/com/ethjava/sol/erc20_example.sol
new file mode 100644
index 0000000..48a5976
--- /dev/null
+++ b/src/main/java/com/ethjava/sol/erc20_example.sol
@@ -0,0 +1,153 @@
+pragma solidity ^0.4.16;
+
+interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
+
+contract TokenERC20 {
+ // Public variables of the token
+ string public name;
+ string public symbol;
+ uint8 public decimals = 18;
+ // 18 decimals is the strongly suggested default, avoid changing it
+ uint256 public totalSupply;
+
+ // This creates an array with all balances
+ mapping (address => uint256) public balanceOf;
+ mapping (address => mapping (address => uint256)) public allowance;
+
+ // This generates a public event on the blockchain that will notify clients
+ event Transfer(address indexed from, address indexed to, uint256 value);
+
+ // This notifies clients about the amount burnt
+ event Burn(address indexed from, uint256 value);
+
+ /**
+ * Constructor function
+ *
+ * Initializes contract with initial supply tokens to the creator of the contract
+ */
+ function TokenERC20(
+ uint256 initialSupply,
+ string tokenName,
+ string tokenSymbol
+ ) public {
+ totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
+ balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
+ name = tokenName; // Set the name for display purposes
+ symbol = tokenSymbol; // Set the symbol for display purposes
+ }
+
+ /**
+ * Internal transfer, only can be called by this contract
+ */
+ function _transfer(address _from, address _to, uint _value) internal {
+ // Prevent transfer to 0x0 address. Use burn() instead
+ require(_to != 0x0);
+ // Check if the sender has enough
+ require(balanceOf[_from] >= _value);
+ // Check for overflows
+ require(balanceOf[_to] + _value > balanceOf[_to]);
+ // Save this for an assertion in the future
+ uint previousBalances = balanceOf[_from] + balanceOf[_to];
+ // Subtract from the sender
+ balanceOf[_from] -= _value;
+ // Add the same to the recipient
+ balanceOf[_to] += _value;
+ Transfer(_from, _to, _value);
+ // Asserts are used to use static analysis to find bugs in your code. They should never fail
+ assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
+ }
+
+ /**
+ * Transfer tokens
+ *
+ * Send `_value` tokens to `_to` from your account
+ *
+ * @param _to The address of the recipient
+ * @param _value the amount to send
+ */
+ function transfer(address _to, uint256 _value) public {
+ _transfer(msg.sender, _to, _value);
+ }
+
+ /**
+ * Transfer tokens from other address
+ *
+ * Send `_value` tokens to `_to` on behalf of `_from`
+ *
+ * @param _from The address of the sender
+ * @param _to The address of the recipient
+ * @param _value the amount to send
+ */
+ function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
+ require(_value <= allowance[_from][msg.sender]); // Check allowance
+ allowance[_from][msg.sender] -= _value;
+ _transfer(_from, _to, _value);
+ return true;
+ }
+
+ /**
+ * Set allowance for other address
+ *
+ * Allows `_spender` to spend no more than `_value` tokens on your behalf
+ *
+ * @param _spender The address authorized to spend
+ * @param _value the max amount they can spend
+ */
+ function approve(address _spender, uint256 _value) public
+ returns (bool success) {
+ allowance[msg.sender][_spender] = _value;
+ return true;
+ }
+
+ /**
+ * Set allowance for other address and notify
+ *
+ * Allows `_spender` to spend no more than `_value` tokens on your behalf, and then ping the contract about it
+ *
+ * @param _spender The address authorized to spend
+ * @param _value the max amount they can spend
+ * @param _extraData some extra information to send to the approved contract
+ */
+ function approveAndCall(address _spender, uint256 _value, bytes _extraData)
+ public
+ returns (bool success) {
+ tokenRecipient spender = tokenRecipient(_spender);
+ if (approve(_spender, _value)) {
+ spender.receiveApproval(msg.sender, _value, this, _extraData);
+ return true;
+ }
+ }
+
+ /**
+ * Destroy tokens
+ *
+ * Remove `_value` tokens from the system irreversibly
+ *
+ * @param _value the amount of money to burn
+ */
+ function burn(uint256 _value) public returns (bool success) {
+ require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
+ balanceOf[msg.sender] -= _value; // Subtract from the sender
+ totalSupply -= _value; // Updates totalSupply
+ Burn(msg.sender, _value);
+ return true;
+ }
+
+ /**
+ * Destroy tokens from other account
+ *
+ * Remove `_value` tokens from the system irreversibly on behalf of `_from`.
+ *
+ * @param _from the address of the sender
+ * @param _value the amount of money to burn
+ */
+ function burnFrom(address _from, uint256 _value) public returns (bool success) {
+ require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
+ require(_value <= allowance[_from][msg.sender]); // Check allowance
+ balanceOf[_from] -= _value; // Subtract from the targeted balance
+ allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
+ totalSupply -= _value; // Update totalSupply
+ Burn(_from, _value);
+ return true;
+ }
+}