即时通讯app开发案例丨即时通讯系统开发(成熟技术及源码)
区块链的核心——分布式和存储不依赖于中心化的硬件或管理机构,在区块链中的所有节点的权限和义务都是对等的,Therefore,each result can also participate in the recording and maintenance of data.It differs from traditional data structures that rely on the"center"and can achieve point-to-point data transmission and real-time data recording,with higher efficiency and faster speed.
区块链的核心技术之一就是公开且透明的交易信息。一般情况下,在区块链内产生、流转和存储的信息是对所有节点用户开放的,其高度的透明化也使得区块内的所有人都能够查看数据的所有相关信息同时使用其应用。Therefore,blockchain technology has certain advantages in the fields of information sharing and data exchange.
const SimpleStorage=artifacts.require("SimpleStorage");
module.exports=function(deployer){
deployer.deploy(SimpleStorage);
};
pragma solidity^0.8.0;
contract SimpleStorage{
uint256 private value;
function setValue(uint256 newValue)public{
value=newValue;
}
function getValue()public view returns(uint256){
return value;
}
}
const Web3=require("web3");
const ganache=require("ganache-cli");
const web3=new Web3(ganache.provider());
web3.eth.getAccounts().then(accounts=>{
console.log(accounts);
});

