java调取solidity

package com.demo.web3j;


import cn.hutool.json.JSONUtil;
import com.demo.utils.Test3;
import org.bitcoinj.crypto.MnemonicException;
import org.junit.Test;
import org.web3j.crypto.Credentials;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.methods.response.EthTransaction;
import org.web3j.protocol.http.HttpService;
import org.web3j.tx.Contract;
import org.web3j.tx.gas.DefaultGasProvider;

import java.math.BigDecimal;
import java.math.BigInteger;

/**
 * 测试数据
 *
 * @Autor Tricky
 * @Date 2021-04-01 22:06:36
 */

public class EthTestData {

//    {"address":"0xdb4065e4151933606924171dfafdf4a56cc3807d","privateKey":"6317dac0d278314b0a4c2f026aef25c1321e6956b245e931357c887e26a336a8"}
    private String privateKey="0x204b7f58cbaaff80e11aa58895ef1020b0d90c34cfcbbab900e334ab9951e738";

    private String myAddress = "0xdb4065e4151933606924171dfafdf4a56cc3807d";

    //rinkeby上面的测试币 erc20-usdt同款
    private String contract="0xf805ed280cadeadc2aa135808688e06fef5a9b71";

    private Web3j web3j ;

    {
        try{
            //如果这个地址不知道怎么获取 可以参考  https://blog.csdn.net/sail331x/article/details/115395131
            web3j = Web3j.build(new HttpService("https://mainnet.infura.io/v3/6e2e7a0f108840b989df9acab441543e"));
        }catch (Throwable t){
            t.printStackTrace();
        }
    }


    public static void main(String[] arg) throws Exception {
        String privateKey="0x671da391061849f5dd736caab8d79a671d4b71e909e5c75908e2abd3aa96da12";
        Credentials credentials = Credentials.create(privateKey);
        Web3j web3j = Web3j.build(new HttpService("http://127.0.0.1:8545"));
//        System.out.println("查询ETH:"+EthUtils.balanceOf(web3j,credentials.getAddress()));

        System.out.println("查询ERC20:"+EthUtils.balanceOfErc20(web3j,"0x066d8E6D7a0218e1E71f784B88724212Aa3919c9",credentials.getAddress()));
        EthTransaction tx = EthUtils.getTransaction(web3j, "0x066d8E6D7a0218e1E71f784B88724212Aa3919c9");
        System.out.println("查询交易:"+ JSONUtil.toJsonStr(tx));
//
        BigInteger gasPrices =     DefaultGasProvider.GAS_PRICE;
                BigInteger gasLimit =DefaultGasProvider.GAS_LIMIT;

        ;

        System.out.println(credentials.getAddress());


//注意 这里是发布合约 每次发布都要燃气费 所以java发布合约时记得只发布一次 或者通过remix发布,后面直接调用即可
-----------------------------***--------------------------------------------------
        // 部署合约，这里Test_sol_testEth是由web3j生成的java文件的类，需要改成你自己的类名
        Test3 deployContract = Test3.deploy(web3j, credentials, gasPrices, gasLimit).send();

        // 部署完成后打印合约地址
        System.out.println(deployContract.getContractAddress());

        // 判断部署的合约是否可用
        System.out.println(deployContract.isValid());


-----------------------------***--------------------------------------------------

        // 调用合约
        Test3 testContract = new Test3(deployContract.getContractAddress(),web3j,
                credentials,gasPrices,gasLimit);
        Boolean send = testContract.isEqual(BigInteger.valueOf(2), BigInteger.valueOf(2)).send();

        System.out.println("-----*****-------");
        System.out.println(send);
        System.out.println("******----******");
    }
    /**
     * 创建地址
     */
    @Test
    public void createAddress() throws MnemonicException.MnemonicLengthException {
        System.out.println("创建地址:"+JSONUtil.toJsonStr(EthUtils.createAddress()));
    }

    /**
     * 查询eth数量
     */
    @Test
    public void balanceOf(){
        System.out.println("查询ETH:"+EthUtils.balanceOf(web3j,myAddress));
    }

    /**
     * 查询ERC20数量
     */
    @Test
    public void balanceOfErc20(){
        System.out.println("查询ERC20:"+EthUtils.balanceOfErc20(web3j,contract,myAddress));
    }

    /**
     * 发送ERC20
     */
    @Test
    public void sendErc20(){
        String txid = EthUtils.sendErc20(web3j, contract, privateKey, myAddress, BigInteger.valueOf(10000000));
        System.out.println("发送ERC20:"+txid);
    }

    /**
     * 发送以太坊
     */
    @Test
    public void sendEth(){
        String txid = EthUtils.sendEth(web3j, privateKey, myAddress, new BigDecimal("0.001"));
        System.out.println("发送ETH:"+txid);
    }

    @Test
    public void getTransaction(){
        //合约
        String txid="0x29d96b351be4ab1c29912a1c26c1c8f9205fc35fb9ea2395c53c5c2e1884c421";
        //eth
        String txid2="0xef3c06f56085187d6a43edec2bb399a7fe98572aad63bcd5bd80e5e5dab153b3";
        EthTransaction tx = EthUtils.getTransaction(web3j, txid2);
        System.out.println("查询交易:"+ JSONUtil.toJsonStr(tx));
    }
}

package com.demo.web3j;


import cn.hutool.core.util.StrUtil;
import com.google.common.collect.ImmutableList;
import lombok.extern.slf4j.Slf4j;
import org.bitcoinj.crypto.*;
import org.bitcoinj.wallet.DeterministicSeed;
import org.web3j.abi.FunctionEncoder;
import org.web3j.abi.TypeReference;
import org.web3j.abi.datatypes.Address;
import org.web3j.abi.datatypes.Function;
import org.web3j.abi.datatypes.Type;
import org.web3j.abi.datatypes.generated.Uint256;
import org.web3j.crypto.*;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.DefaultBlockParameterName;
import org.web3j.protocol.core.DefaultBlockParameterNumber;
import org.web3j.protocol.core.methods.response.*;
import org.web3j.utils.Numeric;
import sun.security.provider.SecureRandom;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.RoundingMode;
import java.util.*;

/**
 * 以太坊工具类
 *
 * @Autor Tricky
 * @Date 2021-04-01 21:02:11
 */
@Slf4j
public class EthUtils {

    public static final BigDecimal ETH_DECIMALS = new BigDecimal(1_000_000_000_000_000_000L);

    public static final BigInteger ETH_GAS_LIMIT = new BigInteger("100000");
    private final static ImmutableList BIP44_ETH_ACCOUNT_ZERO_PATH =
            ImmutableList.of(new ChildNumber(44, true), new ChildNumber(60, true),
                    ChildNumber.ZERO_HARDENED, ChildNumber.ZERO);


    /**
     * 获取区块数据
     *
     * @param web3j
     * @param block                  块高
     * @param fullTransactionObjects 是否需要交易数据
     * @return
     */
    public static EthBlock getBlock(Web3j web3j, long block, boolean fullTransactionObjects) {
        try {
            return web3j.ethGetBlockByNumber(new DefaultBlockParameterNumber(block), fullTransactionObjects).send();
        } catch (Throwable t) {
            log.error(String.format("Get Block Error %d", block), t);
        }
        return null;
    }

    /**
     * 获取当前块高
     *
     * @param web3j
     * @return
     */
    public static long getNowBlockNumber(Web3j web3j) {
        try {
            EthBlockNumber send = web3j.ethBlockNumber().send();
            return send.getBlockNumber().longValue();
        } catch (Throwable t) {
            log.error("GetBlockNumberError", t);
        }
        return -1;
    }

    /**
     * 发送erc20
     *
     * @param web3j
     * @param contractAddress 合约地址
     * @param privateKey      私钥
     * @param to              收款地址
     * @param value           额度
     * @return
     */
    public static String sendErc20(Web3j web3j, String contractAddress, String privateKey,
                                   String to, BigInteger value) {
        String from = getAddressByPrivateKey(privateKey);
        log.info(String.format("Start:SendErc20 from:%s to:%s amount:%s erc20:%s", from, to, value.toString(), contractAddress));
        try {
            //加载转账所需的凭证，用私钥
            Credentials credentials = Credentials.create(privateKey);
            //获取nonce，交易笔数
            BigInteger nonce = getNonce(web3j, from);
            if (nonce == null) {
                log.error(String.format("END:GetNonceError from:%s to:%s amount:%s erc20:%s", from, to, value.toString(), contractAddress));
                return null;
            }
            //gasPrice和gasLimit 都可以手动设置
            BigInteger gasPrice = getGasPrice(web3j);
            if (gasPrice == null) {
                log.error(String.format("END:GetGasPriceError from:%s to:%s amount:%s erc20:%s", from, to, value.toString(), contractAddress));
                return null;
            }
            //BigInteger.valueOf(4300000L) 如果交易失败 很可能是手续费的设置问题
            BigInteger gasLimit = BigInteger.valueOf(60000L);
            //ERC20代币合约方法
            Function function = new Function(
                    "transfer",
                    Arrays.asList(new Address(to), new Uint256(value)),
                    Collections.singletonList(new TypeReference() {
                    }));
            //创建RawTransaction交易对象
            String encodedFunction = FunctionEncoder.encode(function);
            RawTransaction rawTransaction = RawTransaction.createTransaction(nonce, gasPrice, gasLimit,
                    contractAddress, encodedFunction);

            //签名Transaction
            byte[] signMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
            String hexValue = Numeric.toHexString(signMessage);
            //发送交易
            EthSendTransaction ethSendTransaction = web3j.ethSendRawTransaction(hexValue).sendAsync().get();
            String hash = ethSendTransaction.getTransactionHash();
            if (hash != null) {
                return hash;
            }
            log.error(String.format("END:HashIsNull from:%s to:%s amount:%s erc20:%s", from, to, value.toString(), contractAddress));
        } catch (Throwable t) {
            log.error(String.format("发送ERC20失败 from=%s to=%s erc20=%s amount=%s",
                    from, to, contractAddress, value.toString()), t);
        }
        return null;
    }

    /**
     * 列出交易信息
     *
     * @param block  区块高度
     * @param filter 过滤器
     * @return
     */
    public static List getTransactions(Web3j web3j, long block, java.util.function.Function filter) {
        EthBlock send = getBlock(web3j, block, true);
        if (send == null) {
            log.error(String.format("GetBlockDataError:%d", block));
            return Collections.emptyList();
        }
        List transactions = send.getBlock().getTransactions();
        if (filter != null) {
            List result = new ArrayList<>();
            for (EthBlock.TransactionResult e : transactions) {
                try {
                    if (filter.apply(e)) {
                        result.add(e);
                    }
                } catch (Throwable t) {
                    log.error(t.getMessage(), t);
                }
            }
            return result;
        }
        return transactions;

    }

    /**
     * 根据私钥获取地址
     *
     * @param privateKey
     * @return
     */
    public static String getAddressByPrivateKey(String privateKey) {
        ECKeyPair ecKeyPair = ECKeyPair.create(new BigInteger(privateKey, 16));
        return "0x" + Keys.getAddress(ecKeyPair).toLowerCase();
    }


    /**
     * 创建地址
     *
     * @return
     */
    public static EthAddress createAddress() throws MnemonicException.MnemonicLengthException {
        SecureRandom secureRandom = new SecureRandom();
        byte[] entropy = new byte[DeterministicSeed.DEFAULT_SEED_ENTROPY_BITS / 8];
        secureRandom.engineNextBytes(entropy);

        //生成12位助记词
        List str = MnemonicCode.INSTANCE.toMnemonic(entropy);

        //使用助记词生成钱包种子
        byte[] seed = MnemonicCode.toSeed(str, "");
        DeterministicKey masterPrivateKey = HDKeyDerivation.createMasterPrivateKey(seed);
        DeterministicHierarchy deterministicHierarchy = new DeterministicHierarchy(masterPrivateKey);
        DeterministicKey deterministicKey = deterministicHierarchy
                .deriveChild(BIP44_ETH_ACCOUNT_ZERO_PATH, false, true, new ChildNumber(0));
        byte[] bytes = deterministicKey.getPrivKeyBytes();
        ECKeyPair keyPair = ECKeyPair.create(bytes);
        //通过公钥生成钱包地址
        String address = Keys.getAddress(keyPair.getPublicKey());
        String privateKey = "0x" + keyPair.getPrivateKey().toString(16);
        String publicKey = keyPair.getPublicKey().toString(16);
        address = "0x" + address;

        return EthAddress.builder().privateKey(privateKey).publicKey(publicKey).address(address).mnemonic(str).build();
    }

    /**
     * 查询地址以太坊数量
     *
     * @param web3j
     * @param address 查询地址
     * @return
     */
    public static BigDecimal balanceOf(Web3j web3j, String address) {
        try {
            EthGetBalance balance = web3j.ethGetBalance(address, DefaultBlockParameterName.LATEST).send();
            BigInteger amount = balance.getBalance();
            if (amount == null || amount.compareTo(BigInteger.ZERO) <= 0) {
                return BigDecimal.ZERO;
            }
            return new BigDecimal(amount).divide(ETH_DECIMALS, 18, RoundingMode.FLOOR);
        } catch (Throwable t) {
            log.error(String.format("获取以太坊数量出错 %s", address), t);
        }
        return BigDecimal.ZERO;
    }


    /**
     * 转换成最小单位 Wei
     *
     * @param ethAmount
     * @return
     */
    public static BigInteger toWei(BigDecimal ethAmount) {
        return ethAmount.multiply(ETH_DECIMALS).toBigInteger();
    }

    /**
     * wei to eth
     *
     * @param wei
     * @return
     */
    public static BigDecimal toEth(BigInteger wei) {
        return new BigDecimal(wei).divide(ETH_DECIMALS, 18, RoundingMode.FLOOR);
    }

    /**
     * 查询erc20的余额
     *
     * @param web3j
     * @param contract 合约地址
     * @param address  查询地址
     * @return
     */
    public static BigInteger balanceOfErc20(Web3j web3j, String contract, String address) {
        try {
            final String DATA_PREFIX = "0x70a08231000000000000000000000000";
            String value = web3j.ethCall(org.web3j.protocol.core.methods.request.Transaction.createEthCallTransaction(address,
                    contract, DATA_PREFIX + address.substring(2)), DefaultBlockParameterName.PENDING).send().getValue();
            if (StrUtil.isEmptyIfStr(value)) {
                return BigInteger.ZERO;
            }
            return new BigInteger(value.substring(2), 16);
        } catch (Throwable t) {
            log.error(String.format("查询ERC20失败 contract:%s address:%s", contract, address), t);
        }
        return BigInteger.ZERO;
    }

    /**
     * 获取gas-price
     *
     * @param web3j
     * @return
     */
    public static BigInteger getGasPrice(Web3j web3j) {
        try {
            EthGasPrice ethGasPrice = web3j.ethGasPrice().sendAsync().get();
            if (ethGasPrice == null) {
                log.error("GetGasPriceError");
                return null;
            }
            return ethGasPrice.getGasPrice();
        } catch (Throwable t) {
            log.error(t.getMessage(), t);
        }
        return null;
    }

    /**
     * 获取nonce
     *
     * @param web3j
     * @param address
     * @return
     */
    public static BigInteger getNonce(Web3j web3j, String address) {
        try {
            EthGetTransactionCount ethGetTransactionCount = web3j.ethGetTransactionCount(address, DefaultBlockParameterName.PENDING).send();
            if (ethGetTransactionCount == null) {
                log.error("GetNonceError:" + address);
                return null;
            }
            return ethGetTransactionCount.getTransactionCount();
        } catch (Throwable t) {
            log.error("GetNonceError:" + address);
        }
        return null;
    }

    /**
     * 发送以太坊
     *
     * @param web3j
     * @param privateKey 发送者私钥
     * @param to         收款地址
     * @param wei        wei为单位的数量
     * @param gasPrice   gas-price
     * @param gasLimit   gas-limit
     * @return
     */
    public static String sendEth(Web3j web3j, String privateKey, String to, BigInteger wei, BigInteger gasPrice, BigInteger gasLimit) {
        String from = getAddressByPrivateKey(privateKey);
        try {
            //加载转账所需的凭证，用私钥
            Credentials credentials = Credentials.create(privateKey);
            //获取nonce，交易笔数
            BigInteger nonce = getNonce(web3j, from);
            //创建RawTransaction交易对象
            RawTransaction rawTransaction = RawTransaction.createEtherTransaction(nonce, gasPrice, gasLimit, to, wei);
            //签名Transaction，这里要对交易做签名
            byte[] signMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
            String hexValue = Numeric.toHexString(signMessage);
            //发送交易
            EthSendTransaction ethSendTransaction = web3j.ethSendRawTransaction(hexValue).sendAsync().get();
            return ethSendTransaction.getTransactionHash();
        } catch (Throwable t) {
            log.error(String.format("发送ETH失败 from:%s to:%s amount-eth:%s", from, to, toEth(wei).toString()));
        }
        return null;
    }

    /**
     * 发送以太坊
     *
     * @param web3j
     * @param privateKey 发送者私钥
     * @param to         收款地址
     * @param wei        wei为单位的数量
     * @return
     */
    public static String sendEth(Web3j web3j, String privateKey, String to, BigInteger wei) {
        return sendEth(web3j, privateKey, to, wei, getGasPrice(web3j), ETH_GAS_LIMIT);
    }

    /**
     * 发送以太坊
     *
     * @param web3j
     * @param privateKey 发送者私钥
     * @param to         收款地址
     * @param eth        wei为单位的数量
     * @param gasPrice   gas-price
     * @param gasLimit   gas-limit
     * @return
     */
    public static String sendEth(Web3j web3j, String privateKey, String to, BigDecimal eth, BigInteger gasPrice, BigInteger gasLimit) {
        return sendEth(web3j, privateKey, to, toWei(eth), gasPrice, gasLimit);
    }

    /**
     * 发送以太坊
     *
     * @param web3j
     * @param privateKey 发送者私钥
     * @param to         收款地址
     * @param eth        wei为单位的数量
     * @return
     */
    public static String sendEth(Web3j web3j, String privateKey, String to, BigDecimal eth) {
        return sendEth(web3j, privateKey, to, toWei(eth), getGasPrice(web3j), ETH_GAS_LIMIT);
    }

    /**
     * 根据hash获取交易信息
     *
     * @param web3j
     * @param hash
     * @return
     */
    public static EthTransaction getTransaction(Web3j web3j, String hash) {
        try {
            EthTransaction tx = web3j.ethGetTransactionByHash(hash).send();
            return tx;
        } catch (Throwable t) {
            log.error("GetTransactionError:" + hash, t);
        }
        return null;
    }
}

package com.demo.web3j;

import lombok.Builder;
import lombok.Data;

import java.util.List;

@Builder
@Data
public class EthAddress {
    private String address;
    private String privateKey;
    private String publicKey;
    private List mnemonic;
}