[区块链]以太坊DApp快速入门教程

DApp原理

去中心化app的数据存储在中心化服务器上，DApp的数据存储在区块链上

DApp开发环境介绍

• geth+js

• ganacha+js

• truffle

Geth私链环境搭建

• 安装geth

$ sudo apt-get install software-properties-common
$ sudo apt-get-repository -y ppa:ethereum/ethereum
$ sudo apt-get update
$ sudo apt-get install ethereum

• 创建创世块文件genesis.json

$ sudo apt install vim//如果买有安装vim需要安装后使用
$ vim genesis.json
{
    "nonce": "0x0000000000000042",
    "difficulty": "0x200",
    "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "coinbase": "0x0000000000000000000000000000000000000000",
    "timestamp": "0x00",
    "parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "extraData": "0x",
    "gasLimit": "0x2CD29C0",
    "alloc": {},
    "config": {
        "chainId": 6500,
        "homesteadBlock": 0
    }
}//需要保存后退出，具体vim操作请自行移步查看https://blog.csdn.net/blood_Z/article/details/125064927

• 初始化

$ geth --datadir "chain" init genesis.json

操作完成后会显示如下图所示

?

• 启动geth

$ geth --identity "myetherum"  --rpc  --rpccorsdomain "*" --datadir "clain" --port "30303"  --rpcapi ? ?  "db,eth,net,web,personal,miner"  --networkid 6500 consloe 2>1.txt

未完待续...