以太坊从重新部署合约到把生产相关文件引入web3j到解析input data

1. 重新在Remix上测试合约成功后，将dapp目录下的contracts下对应的sol文件替换（以webpack生成的包为例子）；
2. 一般我会选择删除测试私链的数据，然后重新初始化、启动geth、新建账户、挖矿等；

   rm -rf data/* nohup.out output.log
   geth --datadir data/ init genesis.json
   nohup geth --datadir data/ --networkid 15 --rpc --rpcapi db,eth,net,web3,personal,miner --rpcport 8545 --rpcaddr 0.0.0.0 --allow-insecure-unlock --nodiscover --rpccorsdomain "*" 2>output.log &

   贴上相关的配置文件：
   genesis.json

   {
     "config": {
       "chainId": 15,
       "homesteadBlock": 0,
       "eip150Block": 0,
       "eip155Block": 0,
       "eip158Block": 0,
       "byzantiumBlock": 0,
       "constantinopleBlock": 0,
       "petersburgBlock": 0,
       "istanbulBlock": 0
     },
     "alloc": {},
     "coinbase": "0x0000000000000000000000000000000000000000",
     "difficulty": "0x100",
     "extraData": "",
     "gasLimit": "0xffffffff",
     "nonce": "0x0000000000000042",
     "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
     "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
     "timestamp": "0x00"
   }

   truffle-config.json

   require('babel-register')
   module.exports = {
     networks: {
       development: {
         port: 8545,      
         host: 'localhost',
         network_id: '*',
         gas: 6700000
       }
     },
     compilers: {
       solc: {
         version: "0.6.4"
       }
    }
   }
   

   2_deploy_contracts.js

   const SiLuan = artifacts.require("SiLuan");
   
   module.exports = function(deployer) {
     deployer.deploy(SiLuan);
   };

   
    

3. 生成合约的java文件以便导入idea
    

   ../relatedEnv/web3j-4.5.5/bin/web3j truffle generate build/contracts/SiLuan.json -o . -p .

   前面这个是web3j的包的位置 -o 输出路径 -p 输出包

4. truffle migrate 部署合约

5. 将合约地址、私钥、账户地址等参数导入项目
    

   web3j:
       client-address: http://192.168.123.76:8545
       password=123456
       path=E:\\winshare\\UTC--2020-04-17T07-11-08.390910900Z--0e10b3a6c88909925401e7aa64efddf44670caa5
       contract_address=0x36Bd220e5c71bBdf9c1aF0B64bC9918b7014ac7f
       user1_address=0x0e10b3a6c88909925401e7aa64efddf44670caa5
       abi=[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"string",等等}]
   

   
    

6. input data的解析
   导入包：
   相关帮助：GitHub - prettymuchbryce/abidecoder: Kotlin and Java library for decoding data params and events from ethereum transactions

           
               org.ethereum
               ethereumj-core
               1.7.2-RELEASE
           
           
               org.jetbrains.kotlin
               kotlin-reflect
               1.3.71
               runtime
           
           
               org.jetbrains.kotlin
               kotlin-stdlib
               1.3.71
           
           
               com.github.prettymuchbryce
               abidecoder
               3ae24ecb55
           

   最后一个包需要基于前三个包，前三个包可以直接下，最后一个包需要添加repository后再下：
    

   
   	
   		jitpack.io
   		https://jitpack.io
   	
   
   	
   
   	org.github.prettymuchbryce
   	abidecoder
   	master-SNAPSHOT
   

   使用方法
   
   import com.prettymuchbryce.abidecoder.Decoder;
   
   public class Main {
   	public static void main(String[] args) {
   		Decoder d = new Decoder();
   		d.addAbi(myAbiJsonString);
   		Decoder.DecodedMethod result = d.decodeMethod(methodData);
   		System.out.print(result);
   	}
   }