Web3j：從 Java 部署乙太坊合約時出現“Intrinsic gas too low”錯誤

July 23, 2020

我是乙太坊和區塊鏈的新手，我一直在嘗試使用 Metamask 和 Remix 使用 Chrome 瀏覽器執行合約。

我正在嘗試使用 Web3j 從 Java 部署相同的契約。

但是當我嘗試執行我的契約時，我收到以下錯誤Intrinsic gas too low

Exception in thread "main" java.util.concurrent.ExecutionException: java.lang.RuntimeException: Error processing transaction request: Intrinsic gas too low
   at java.util.concurrent.CompletableFuture.reportGet(Unknown Source)
   at java.util.concurrent.CompletableFuture.get(Unknown Source)
   at com.solartis.bc.Sample.main(Sample.java:44)
Caused by: java.lang.RuntimeException: Error processing transaction request: Intrinsic gas too low
   at org.web3j.tx.ManagedTransaction.send(ManagedTransaction.java:43)
   at org.web3j.tx.Contract.lambda$deployAsync$24(Contract.java:288)...

我已經閱讀了其他幾個問題以增加“Gas”值，但無論我給出多少更高的值，我仍然得到同樣的錯誤。

有沒有其他人遇到過同樣的問題，我不確定我做錯了什麼。下面附上更多細節

ContractRunner.java

package com.solartis.bc;

public class ContractRunner {

   public static void main(String args[]) throws InterruptedException, ExecutionException, IOException, CipherException, TransactionTimeoutException {
       Web3j web3 = Web3j.build(new HttpService("http://xxxxxxx.westus.cloudapp.azure.com:8545/"));  // defaults to http://localhost:8545/
       Web3ClientVersion web3ClientVersion = web3.web3ClientVersion().sendAsync().get();
       String clientVersion = web3ClientVersion.getWeb3ClientVersion();
       System.out.println(clientVersion);
       Credentials credentials = WalletUtils.loadCredentials("Mxxxxxxxxe", "C:\\Users\\adheep_m\\AppData\\Roaming\\Ethereum\\keystore\\UTC--2017-07-07T13-52-18.006069200Z--3b0d3fa08f0e0b3da8fe1f8ac0e05861bfdada25");
       System.out.println(credentials.getAddress());

       BigInteger GAS = new BigInteger("30000000");
       BigInteger GAS_PRICE = new BigInteger("20");
       BigInteger ETH = new BigInteger("1");
       //LeisureTravelPolicyHolder contract = LeisureTravelPolicyHolder.deploy(web3,credentials,GAS,GAS_PRICE,ETH,test,test,test,test,test,test,test,test,test).get();

       Token con = Token.deploy(web3,credentials,GAS,GAS_PRICE,ETH).get();
       System.out.println(con.getContractAddress());
   }
}

令牌.sol

pragma solidity ^0.4.0;

contract Token {
mapping (address =&gt; uint) public balances;

function Token() {
    balances[msg.sender] = 1000000;
}

function transfer(address _to, uint _amount) {
    if (balances[msg.sender] &lt; _amount) {
        throw;
    }

    balances[msg.sender] -= _amount;
    balances[_to] += _amount;
}
}

Token.java

package com.solartis.bc;

import java.math.BigInteger;
import java.util.Arrays;
import java.util.Collections;
import java.util.concurrent.Future;
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.Credentials;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.methods.response.TransactionReceipt;
import org.web3j.tx.Contract;
import org.web3j.tx.TransactionManager;

/**
* Auto generated code.&lt;br&gt;
* &lt;strong&gt;Do not modify!&lt;/strong&gt;&lt;br&gt;
* Please use {@link org.web3j.codegen.SolidityFunctionWrapperGenerator} to update.
*
* &lt;p&gt;Generated with web3j version 2.2.1.
*/
public final class Token extends Contract {
   private static final String BINARY = "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";

   private Token(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
       super(BINARY, contractAddress, web3j, credentials, gasPrice, gasLimit);
   }

   private Token(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
       super(BINARY, contractAddress, web3j, transactionManager, gasPrice, gasLimit);
   }

   public Future&lt;Uint256&gt; balances(Address param0) {
       Function function = new Function("balances", 
               Arrays.&lt;Type&gt;asList(param0), 
               Arrays.&lt;TypeReference&lt;?&gt;&gt;asList(new TypeReference&lt;Uint256&gt;() {}));
       return executeCallSingleValueReturnAsync(function);
   }

   public Future&lt;TransactionReceipt&gt; transfer(Address _to, Uint256 _amount) {
       Function function = new Function("transfer", Arrays.&lt;Type&gt;asList(_to, _amount), Collections.&lt;TypeReference&lt;?&gt;&gt;emptyList());
       return executeTransactionAsync(function);
   }

   public static Future&lt;Token&gt; deploy(Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit, BigInteger initialWeiValue) {
       return deployAsync(Token.class, web3j, credentials, gasPrice, gasLimit, BINARY, "", initialWeiValue);
   }

   public static Future&lt;Token&gt; deploy(Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit, BigInteger initialWeiValue) {
       return deployAsync(Token.class, web3j, transactionManager, gasPrice, gasLimit, BINARY, "", initialWeiValue);
   }

   public static Token load(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
       return new Token(contractAddress, web3j, credentials, gasPrice, gasLimit);
   }

   public static Token load(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
       return new Token(contractAddress, web3j, transactionManager, gasPrice, gasLimit);
   }
}

我發現出了什麼問題。我的 GAS_PRICE 和 GAS_LIMIT 值不正確。後來我發現 Web3j 有預設的 GAS_PRICE 和 GAS_LIMIT，請參閱下面的更新程式碼
       BigInteger GAS = Contract.GAS_LIMIT;
       BigInteger GAS_PRICE = Contract.GAS_PRICE;
Contract.GAS_LIMIT並且Contract.GAS_PRICE已棄用。因此，請改用以下常量org.web3j.tx.gas.DefaultGasProvider：
DefaultGasProvider.GAS_PRICE; DefaultGasProvider.GAS_LIMIT;

對https://ethereum.stackexchange.com/users/12743/adheep-mohamed-abdul-kader的反應
你不應該使用：
Contract.GAS_LIMIT
因為它已被棄用：
public abstract class Contract extends ManagedTransaction {

   // https://www.reddit.com/r/ethereum/comments/5g8ia6/attention_miners_we_recommend_raising_gas_limit/
   /**
    * @deprecated ...
    * @see org.web3j.tx.gas.DefaultGasProvider
    */
   public static final BigInteger GAS_LIMIT = BigInteger.valueOf(4_300_000);
但使用：
DefaultGasProvider.GAS_LIMIT
DefaultGasProvider.GAS_PRICE
或者DefaultGasProvider馬上
問候