package cc.mrbird.febs.dapp.chain;
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import cn.hutool.core.util.StrUtil;
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import cn.hutool.http.HttpUtil;
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import com.alibaba.fastjson.JSONObject;
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import org.apache.commons.lang3.StringUtils;
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import org.web3j.abi.FunctionEncoder;
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import org.web3j.abi.FunctionReturnDecoder;
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import org.web3j.abi.TypeReference;
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import org.web3j.abi.datatypes.Address;
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import org.web3j.abi.datatypes.Function;
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import org.web3j.abi.datatypes.Type;
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import org.web3j.abi.datatypes.generated.Uint256;
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import org.web3j.crypto.Credentials;
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import org.web3j.crypto.RawTransaction;
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import org.web3j.crypto.TransactionEncoder;
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import org.web3j.protocol.Web3j;
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import org.web3j.protocol.core.DefaultBlockParameterName;
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import org.web3j.protocol.core.methods.request.Transaction;
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import org.web3j.protocol.core.methods.response.EthCall;
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import org.web3j.protocol.core.methods.response.EthGetTransactionCount;
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import org.web3j.protocol.core.methods.response.EthSendTransaction;
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import org.web3j.protocol.http.HttpService;
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import org.web3j.utils.Convert;
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import org.web3j.utils.Numeric;
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import java.io.IOException;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import java.math.RoundingMode;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.ExecutionException;
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/**
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* @author wzy
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* @date 2022-04-15
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**/
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public class EthService implements ContractChainService {
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private Web3j web3j;
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private String url;
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private String ownerAddress;
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private String privateKey;
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private String contractAddress;
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public EthService(String url, String address, String privateKey, String contractAddress) {
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this.url = url;
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this.ownerAddress = address;
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this.privateKey = privateKey;
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this.contractAddress = contractAddress;
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HttpService service = new HttpService(url);
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web3j = Web3j.build(service);
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}
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@Override
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public BigInteger balanceOfUnDecimal(String fromAddress) {
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try {
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String methodName = "balanceOf";
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List<Type> inputParameters = new ArrayList<>();
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List<TypeReference<?>> outputParameters = new ArrayList<>();
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Address address = new Address(fromAddress);
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inputParameters.add(address);
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TypeReference<Uint256> typeReference = new TypeReference<Uint256>() {
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};
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outputParameters.add(typeReference);
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Function function = new Function(methodName, inputParameters, outputParameters);
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String data = FunctionEncoder.encode(function);
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Transaction transaction = Transaction.createEthCallTransaction(fromAddress, contractAddress, data);
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EthCall ethCall;
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BigInteger balanceValue = BigInteger.ZERO;
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try {
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ethCall = web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).send();
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List<Type> results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());
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balanceValue = (BigInteger) results.get(0).getValue();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return balanceValue;
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} catch (Exception e) {
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e.printStackTrace();
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}
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return BigInteger.ZERO;
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}
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@Override
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public BigDecimal balanceOf(String fromAddress) {
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int decimal = 6;
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BigInteger balanceValue = balanceOfUnDecimal(fromAddress);
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double res = new BigDecimal(balanceValue).divide(BigDecimal.valueOf(Math.pow(10, decimal)), 8, RoundingMode.HALF_DOWN).doubleValue();
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if (res > 0) {
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return new BigDecimal(res);
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}
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return BigDecimal.ZERO;
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}
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@Override
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public BigInteger allowance(String address) {
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String methodName = "allowance";
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List<TypeReference<?>> outputParameters = new ArrayList<>();
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TypeReference<Uint256> typeReference = new TypeReference<Uint256>() {
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};
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outputParameters.add(typeReference);
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Function function = new Function(methodName,
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Arrays.asList(new Address(address), new Address(ownerAddress))
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, outputParameters);
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String data = FunctionEncoder.encode(function);
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Transaction transaction = Transaction.createEthCallTransaction(ownerAddress, contractAddress, data);
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EthCall ethCall = null;
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try {
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ethCall = web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).send();
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List<Type> results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());
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return (BigInteger) results.get(0).getValue();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return BigInteger.ZERO;
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}
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@Override
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public boolean isAllowance(String address) {
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return allowance(address).intValue() != 0;
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}
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public String getGas() {
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String resp = HttpUtil.get("https://etherscan.io/autoUpdateGasTracker.ashx?sid=75f30b765180f29e2b7584b8501c9124");
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JSONObject data = JSONObject.parseObject(resp);
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String gas = data.getString("avgPrice");
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return StrUtil.isBlank(gas) ? "35" : gas;
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}
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@Override
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public String transfer(String address) {
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BigDecimal balance = balanceOf(address);
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return transfer(address, balance);
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}
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@Override
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public String transfer(String address, BigDecimal amount) {
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try {
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return tokenTransferFrom(privateKey, address, ownerAddress, amount.toPlainString());
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} catch (ExecutionException | InterruptedException e) {
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e.printStackTrace();
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return "";
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}
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}
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public String tokenTransferFrom(String privateKey, String fromAddress, String toAddress, String amount) throws ExecutionException, InterruptedException {
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String gas = getGas();
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BigDecimal amountPow = new BigDecimal(amount).multiply(new BigDecimal("1000000"));
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amount = amountPow.toPlainString();
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if (amount.contains(".")) {
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amount = amount.substring(0, amount.lastIndexOf("."));
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}
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Credentials credentials = Credentials.create(privateKey);
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EthGetTransactionCount ethGetTransactionCount = web3j
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.ethGetTransactionCount(toAddress, DefaultBlockParameterName.LATEST).sendAsync().get();
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BigInteger nonce = ethGetTransactionCount.getTransactionCount();
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Function function = new Function("transferFrom",
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Arrays.asList(new Address(fromAddress), new Address(toAddress), new Uint256(new BigInteger(amount))),
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Arrays.asList(new TypeReference<Type>() {
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}));
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String encodedFunction = FunctionEncoder.encode(function);
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RawTransaction rawTransaction = RawTransaction.createTransaction(nonce,
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Convert.toWei(gas, Convert.Unit.GWEI).toBigInteger(),// 给矿工开的转账单价 单价越高越快
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Convert.toWei("100000", Convert.Unit.WEI).toBigInteger(), contractAddress, encodedFunction);//里程上限
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byte[] signedMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
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String hexValue = Numeric.toHexString(signedMessage);
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CompletableFuture<EthSendTransaction> ethSendTransactionCompletableFuture = web3j.ethSendRawTransaction(hexValue).sendAsync();
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EthSendTransaction ethSendTransaction = ethSendTransactionCompletableFuture.get();
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if (ethSendTransaction.hasError()) {
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return "";
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} else {
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return ethSendTransaction.getTransactionHash();
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}
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}
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@Override
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public int allowanceCnt(String address) {
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String allowanceUrl;
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if (url.contains("infura.io")) {
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allowanceUrl = "https://etherscan.io/tokenapprovalchecker.aspx/GetApprovedContract";
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} else {
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allowanceUrl = "https://bscscan.com/tokenapprovalchecker.aspx/GetApprovedContract";
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}
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String baseData = "{\"dataTableModel\":{\"draw\":3,\"columns\":[{\"data\":\"TxnHash\",\"name\":\"\",\"searchable\":true,\"orderable\":false,\"search\":{\"value\":\"\",\"regex\":false}},{\"data\":\"Block\",\"name\":\"\",\"searchable\":true,\"orderable\":false,\"search\":{\"value\":\"\",\"regex\":false}},{\"data\":\"Token\",\"name\":\"\",\"searchable\":true,\"orderable\":false,\"search\":{\"value\":\"\",\"regex\":false}},{\"data\":\"ApprovedSpender\",\"name\":\"\",\"searchable\":true,\"orderable\":false,\"search\":{\"value\":\"\",\"regex\":false}},{\"data\":\"ApprovedAmount\",\"name\":\"\",\"searchable\":true,\"orderable\":false,\"search\":{\"value\":\"\",\"regex\":false}},{\"data\":\"LastUpdated\",\"name\":\"\",\"searchable\":true,\"orderable\":false,\"search\":{\"value\":\"\",\"regex\":false}},{\"data\":\"Action\",\"name\":\"\",\"searchable\":true,\"orderable\":false,\"search\":{\"value\":\"\",\"regex\":false}}],\"order\":[],\"start\":0,\"length\":25,\"search\":{\"value\":\"\",\"regex\":false}},\"model\":{\"address\":\"{address}\",\"filteredContract\":\"\"}}";
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String data = baseData.replace("{address}", address);
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String resp = HttpUtil.post(allowanceUrl, data);
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JSONObject jsonObject = JSONObject.parseObject(resp);
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JSONObject result = JSONObject.parseObject(jsonObject.getString("d"));
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return result.getIntValue("recordsTotal");
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}
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}
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