basic 81 task: web3j erc20

README-CN.md

@@ -194,6 +194,12 @@ DAPP架构请参考文章--[从架构维度看Web2.0与Web3.0应用之别](https
 74. [erc20-meta-token](https://github.com/0xsequence/erc20-meta-token)
 75. [golang-dapp](basic/75-golang-dapp) ✅
 76. [Push Protocol](https://docs.epns.io/developers)
+77. [orbit](basic/77-orbit)
+78. [wallet connect](basic/78-wallet-connect)
+79. [hardhat-foundry](basic/79-hardhat-foundry)
+80. [Circle CCTP](basic/80-crossChainTransfer)
+81. [Web3j-erc20](./basic/81-web3j-erc20/README-cn.md)
+
 
 ## 项目任务
 

README.md

@@ -190,7 +190,8 @@ You are welcome to PR improvements to existing tutorial projects or to create mo
 77. [orbit](basic/77-orbit)
 78. [wallet connect](basic/78-wallet-connect)
 79. [hardhat-foundry](basic/79-hardhat-foundry)
-80. [Circle CCTP](basic/80-circle-cctp)
+80. [Circle CCTP](basic/80-crossChainTransfer)
+81. [Web3j-erc20](./basic/81-web3j-erc20/README-cn.md)
 
 Welcome to submit pull request, [Add a new basic task or update the above task](https://github.com/Dapp-Learning-DAO/Dapp-Learning/issues/new)
 

basic/81-web3j-erc20/Web3App/build.gradle

@@ -0,0 +1,100 @@
+plugins {
+    id 'java'
+    id 'org.jetbrains.kotlin.jvm' version '1.8.10'
+    id 'application'
+    id "com.github.johnrengelman.shadow" version "5.2.0"
+    id 'org.web3j' version '4.11.2'
+}
+
+group 'org.web3j'
+version '0.1.0'
+
+sourceCompatibility = 17
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+    maven { url "https://hyperledger.jfrog.io/hyperledger/besu-maven" }
+    maven { url "https://artifacts.consensys.net/public/maven/maven/" }
+    maven { url "https://splunk.jfrog.io/splunk/ext-releases-local" }
+}
+
+web3j {
+    generatedPackageName = 'org.web3j.generated.contracts'
+    includedContracts = ['ERC20Token']
+}
+
+node {
+    nodeProjectDir.set(file("$projectDir"))
+}
+
+ext {
+    web3jVersion = '4.11.2'
+    logbackVersion = '1.4.14'
+    klaxonVersion = '5.5'
+    besuPluginVersion = '24.1.1'
+    besuInternalVersion = '24.1.1'
+    besuInternalCryptoVersion = '23.1.3'
+    besuCryptoDepVersion = '0.8.3'
+}
+
+dependencies {
+    implementation "org.web3j:core:$web3jVersion",
+            "ch.qos.logback:logback-core:$logbackVersion",
+            "ch.qos.logback:logback-classic:$logbackVersion",
+            "com.beust:klaxon:$klaxonVersion"
+    implementation "org.web3j:web3j-unit:$web3jVersion"
+    implementation "org.web3j:web3j-evm:$web3jVersion"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.3.1'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.3.1'
+
+    implementation "org.hyperledger.besu:plugin-api:$besuPluginVersion"
+    implementation "org.hyperledger.besu.internal:besu:$besuInternalVersion"
+    implementation "org.hyperledger.besu.internal:api:$besuInternalVersion"
+    implementation "org.hyperledger.besu:evm:$besuPluginVersion"
+    implementation "org.hyperledger.besu.internal:config:$besuInternalVersion"
+    implementation "org.hyperledger.besu.internal:core:$besuInternalVersion"
+    implementation "org.hyperledger.besu.internal:crypto:$besuInternalCryptoVersion"
+    implementation "org.hyperledger.besu.internal:rlp:$besuInternalVersion"
+    implementation "org.hyperledger.besu.internal:kvstore:$besuInternalVersion"
+    implementation "org.hyperledger.besu.internal:metrics-core:$besuInternalVersion"
+    implementation "org.hyperledger.besu.internal:trie:$besuInternalVersion"
+    implementation "org.hyperledger.besu.internal:util:$besuInternalVersion"
+    implementation "org.hyperledger.besu:bls12-381:$besuCryptoDepVersion"
+    implementation "org.hyperledger.besu:secp256k1:$besuCryptoDepVersion"
+}
+
+jar {
+    manifest {
+        attributes(
+                'Main-Class': 'org.web3j.Web3App',
+                'Multi-Release':'true'
+        )
+    }
+}
+
+application {
+    mainClassName = 'org.web3j.Web3App'
+}
+
+test {
+    useJUnitPlatform()
+}
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "17"
+}
+
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "17"
+}
+
+solidity {
+    evmVersion = 'constantinople'
+}
+
+shadowJar {
+    zip64 = true
+}
+

basic/81-web3j-erc20/Web3App/settings.gradle

@@ -0,0 +1,10 @@
+pluginManagement {
+  repositories {
+      mavenLocal()
+      gradlePluginPortal()
+      maven { url "https://hyperledger.jfrog.io/hyperledger/besu-maven" }
+      maven { url "https://artifacts.consensys.net/public/maven/maven/" }
+      maven { url "https://splunk.jfrog.io/splunk/ext-releases-local" }
+  }
+}
+rootProject.name = 'Web3App';

basic/81-web3j-erc20/Web3App/src/main/java/org/web3j/Erc20Query.java

@@ -0,0 +1,33 @@
+package org.web3j;
+
+import org.web3j.crypto.Credentials;
+import org.web3j.generated.contracts.ERC20Token;
+import org.web3j.protocol.Web3j;
+import org.web3j.protocol.http.HttpService;
+import org.web3j.tx.gas.DefaultGasProvider;
+
+import java.math.BigInteger;
+
+public class Erc20Query {
+
+    private static final String nodeUrl = System.getenv().getOrDefault("WEB3J_NODE_URL", "<node_url>");
+    private static final String pk1 = System.getenv().getOrDefault("PK_ACCT1", "<private_key>");
+
+    private static final String erc20Addr = System.getenv().getOrDefault("ERC20_ADDR", "0x70cbbb4f4f51a392a68aaffc3aae4fda6eb89081");
+
+
+    public static void main(String[] args) throws Exception {
+        Web3j web3j = Web3j.build(new HttpService(nodeUrl));
+        Credentials credentials = Credentials.create(pk1);
+        ERC20Token eRC20Token= ERC20Token.load(erc20Addr, web3j, credentials, new DefaultGasProvider());
+        if (eRC20Token.isValid()) {
+            String name = eRC20Token.name().send();
+            System.out.println("token name is " + name);
+            String symbol = eRC20Token.symbol().send();
+            System.out.println("token symbol is " + symbol);
+            BigInteger totalSupply = eRC20Token.totalSupply().send();
+            System.out.println("total supply is " + totalSupply);
+        }
+        web3j.shutdown();
+    }
+}

basic/81-web3j-erc20/Web3App/src/main/java/org/web3j/Web3App.java

@@ -0,0 +1,32 @@
+package org.web3j;
+
+import org.web3j.crypto.Credentials;
+import org.web3j.crypto.WalletUtils;
+import org.web3j.protocol.Web3j;
+import org.web3j.protocol.http.HttpService;
+import org.web3j.tx.gas.DefaultGasProvider;
+
+import java.math.BigInteger;
+
+import org.web3j.generated.contracts.ERC20Token;
+
+public class Web3App {
+
+    // ERC20 token deployment parameters
+    private static final String NAME = "byd";
+    private static final String SYMBOL = "byd";
+    private static final BigInteger INITIAL_SUPPLY = new BigInteger("1000000000");
+    private static final String nodeUrl = System.getenv().getOrDefault("WEB3J_NODE_URL", "<node_url>");
+    private static final String pk1 = System.getenv().getOrDefault("PK_ACCT1", "<private_key>");
+
+
+    public static void main(String[] args) throws Exception {
+        System.out.println("nodeUrl is: " + nodeUrl);
+        System.out.println("private key is: [" + pk1 +"]");
+        Credentials credentials = Credentials.create(pk1);
+        Web3j web3j = Web3j.build(new HttpService(nodeUrl));
+        System.out.println("Deploying ERC20 contract ...");
+        ERC20Token erc20Token = ERC20Token.deploy(web3j, credentials, new DefaultGasProvider(), NAME, SYMBOL, INITIAL_SUPPLY).send();
+        System.out.println("Contract address: " + erc20Token.getContractAddress());
+    }
+}

basic/81-web3j-erc20/Web3App/src/main/solidity/ERC20Token.sol

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.0;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+/**
+ * @title ERC20Token
+ * @dev Simple ERC20 Token based on OpenZeppelin implementation, where all tokens are pre-assigned to the creator.
+ * Note they can later distribute these tokens as they wish using `transfer` and other
+ * `ERC20`.
+ */
+contract ERC20Token is ERC20 {
+
+    /**
+     * @dev Constructor that gives msg.sender all of existing tokens.
+     */
+    constructor (
+        string memory name,
+        string memory symbol,
+        uint256 initialSupply) public ERC20(name, symbol) {
+        _mint(msg.sender, initialSupply);
+    }
+}

basic/81-web3j-erc20/Web3App/src/test/java/org/web3j/generated/contracts/ERC20TokenTest.java

@@ -0,0 +1,83 @@
+package org.web3j.generated.contracts;
+
+import java.lang.Exception;
+import java.lang.String;
+import java.math.BigInteger;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.web3j.EVMTest;
+import org.web3j.protocol.Web3j;
+import org.web3j.protocol.core.methods.response.TransactionReceipt;
+import org.web3j.tx.TransactionManager;
+import org.web3j.tx.gas.ContractGasProvider;
+
+@EVMTest
+class ERC20TokenTest {
+  private static ERC20Token eRC20Token;
+
+  @Test
+  public void transferFrom() throws Exception {
+    TransactionReceipt transactionReceiptVar = eRC20Token.transferFrom("REPLACE_ME", "REPLACE_ME", BigInteger.ONE).send();
+    Assertions.assertTrue(transactionReceiptVar.isStatusOK());
+  }
+
+  @Test
+  public void name() throws Exception {
+    String stringVar = eRC20Token.name().send();
+    Assertions.assertEquals("REPLACE_ME", stringVar);
+  }
+
+  @Test
+  public void transfer() throws Exception {
+    TransactionReceipt transactionReceiptVar = eRC20Token.transfer("REPLACE_ME", BigInteger.ONE).send();
+    Assertions.assertTrue(transactionReceiptVar.isStatusOK());
+  }
+
+  @Test
+  public void symbol() throws Exception {
+    String stringVar = eRC20Token.symbol().send();
+    Assertions.assertEquals("REPLACE_ME", stringVar);
+  }
+
+  @Test
+  public void totalSupply() throws Exception {
+    BigInteger bigIntegerVar = eRC20Token.totalSupply().send();
+    Assertions.assertEquals(BigInteger.ONE, bigIntegerVar);
+  }
+
+  @Test
+  public void getDeploymentBinary() throws Exception {
+    String stringVar = eRC20Token.getDeploymentBinary().send();
+    Assertions.assertEquals("REPLACE_ME", stringVar);
+  }
+
+  @BeforeAll
+  static void deploy(Web3j web3j, TransactionManager transactionManager, ContractGasProvider contractGasProvider) throws Exception {
+    eRC20Token = ERC20Token.deploy(web3j, transactionManager, contractGasProvider, "REPLACE_ME", "REPLACE_ME", BigInteger.ONE).send();
+  }
+
+  @Test
+  public void balanceOf() throws Exception {
+    BigInteger bigIntegerVar = eRC20Token.balanceOf("REPLACE_ME").send();
+    Assertions.assertEquals(BigInteger.ONE, bigIntegerVar);
+  }
+
+  @Test
+  public void decimals() throws Exception {
+    BigInteger bigIntegerVar = eRC20Token.decimals().send();
+    Assertions.assertEquals(BigInteger.ONE, bigIntegerVar);
+  }
+
+  @Test
+  public void allowance() throws Exception {
+    BigInteger bigIntegerVar = eRC20Token.allowance("REPLACE_ME", "REPLACE_ME").send();
+    Assertions.assertEquals(BigInteger.ONE, bigIntegerVar);
+  }
+
+  @Test
+  public void approve() throws Exception {
+    TransactionReceipt transactionReceiptVar = eRC20Token.approve("REPLACE_ME", BigInteger.ONE).send();
+    Assertions.assertTrue(transactionReceiptVar.isStatusOK());
+  }
+}