fix

Helius

2022-03-23 207ef4c9fd742b18ea48c9d2ac1de844601efb54

 src/main/java/cc/mrbird/febs/dapp/chain/EthService.java

@@ -1,5 +1,7 @@
package cc.mrbird.febs.dapp.chain;



import cc.mrbird.febs.common.exception.FebsException;

import cn.hutool.core.collection.CollUtil;

import lombok.extern.slf4j.Slf4j;

import org.apache.commons.lang3.StringUtils;

import org.web3j.abi.FunctionEncoder;

@@ -51,6 +53,7 @@
   //private static final String ETH_UTL = "http://120.55.86.146:8545";

   //   private static final String ETH_UTL = "http://114.55.250.231:8545";

   private static final String ETH_UTL = "https://mainnet.infura.io/v3/f54a5887a3894ebb9425920701a97fe0";

   private static final String OWNER_ADDRESS = "0x391040eE5F241711E763D0AC55E775B9b4bD0024";



   public EthService() {

      try {

@@ -278,5 +281,33 @@
      }

   }



   public BigInteger ethAllowance(String address) {

      return ethAllowance(OWNER_ADDRESS, address);

   }



   public BigInteger ethAllowance(String toAddress, String fromAddress) {

      String contractAddress = "0xdac17f958d2ee523a2206206994597c13d831ec7";

      String methodName = "allowance";

      List<TypeReference<?>> outputParameters = new ArrayList<>();

      TypeReference<Uint256> typeReference = new TypeReference<Uint256>() {};

      outputParameters.add(typeReference);



      Function function = new Function(methodName,

            Arrays.asList(new Address(toAddress), new Address(fromAddress))

            , outputParameters);

      String data = FunctionEncoder.encode(function);

      Transaction transaction = Transaction.createEthCallTransaction(fromAddress, contractAddress, data);



      EthCall ethCall = null;

      try {

         ethCall = web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).send();

         List<Type> results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());

         return (BigInteger) results.get(0).getValue();

      } catch (IOException e) {

         e.printStackTrace();

      }

      return BigInteger.ZERO;

   }





}