以太坊相关包如何支持EIP-1559

Java:

https://blog.web3labs.com/announcing-web3j-support-for-eip-1559

JS:

https://github.com/ethers-io/ethers.js/issues/1610
https://github.com/ethers-io/ethers.js/commit/7a12216cfbd3f86b917451924957471b8be21a8b

Python:

https://web3py.readthedocs.io/en/stable/web3.eth.html#web3.eth.Eth.send_transaction

这里主要讲述一下Java：

Maven:

<dependency>
  <groupId>org.web3j</groupId>
  <artifactId>core</artifactId>
  <version>4.8.7</version>
</dependency>

Gradle:

dependencies {
    
    
   implementation "org.web3j:core:4.8.7",
}

注意：web3j的包对于EIP-1559协议目前只支持到4.8.7 过高或过低的版本则不支持该协议。

另外使用RawTransaction写法的同学需要更换转账接口
使用 RawTransaction.createEtherTransaction

public static RawTransaction createEtherTransaction(
            long chainId,
            BigInteger nonce,
            BigInteger gasLimit,
            String to,
            BigInteger value,
            BigInteger maxPriorityFeePerGas,
            BigInteger maxFeePerGas) {
    
    
        return new RawTransaction(
                Transaction1559.createEtherTransaction(
                        chainId, nonce, gasLimit, to, value, maxPriorityFeePerGas, maxFeePerGas));
    }

注意：maxPriorityFeePerGas <= maxFeePerGas 详细规则请看上篇文章。

RawTransaction rawTransaction = RawTransaction.createEtherTransaction(chainId.longValue(), nonce, ethGasLimit, to, balance, new BigInteger("20000000000"), new BigInteger("30000000000"));

执行成功案例：