SWAP交易平台系统开发技术搭建
区块链上的金生态系统,I88智能合约I928系统开发8024,以去中心化的方式开发和运营,其目标是在透明和去信任化的区块链网络上提供所有类型的金服务,因而无法克服区块链技术本身存在的问题。目前还没有一个区块链系统能同时具有去中心化、准确性和成本效率的特征,为了确保前两个特征,就会出现成本高、效率低和系统不稳定等问题
pragma solidity^0.6.0;
contract Token{
mapping(address=>uint)balances;
uint public totalSupply;
constructor(uint _initialSupply)public{
balances[msg.sender]=totalSupply=_initialSupply;
}
function transfer(address _to,uint _value)public returns(bool){
require(balances[msg.sender]-_value>=0);
balances[msg.sender]-=_value;
balances[_to]+=_value;
return true;
}
function balanceOf(address _owner)public view returns(uint balance){
return balances[_owner];
}
pragma solidity^0.4.11;
interface TxUserWallet{
function transferTo(address dest,uint amount)public;
}
contract TxAttackWallet{
address owner;
function TxAttackWallet()public{
owner=msg.sender;
}
function()public{
TxUserWallet(msg.sender).transferTo(owner,msg.sender.balance);
}
}
}
pragma solidity^0.4.11;
contract Fund{
///合约中|ether|分成的映射。
mapping(address=>uint)shares;
///提取你的分成。
function withdraw()public{
var share=shares[msg.sender];
shares[msg.sender]=0;
msg.sender.transfer(share);
}
}
pragma solidity^0.6.0;
contract Token{
mapping(address=>uint)balances;
uint public totalSupply;
constructor(uint _initialSupply)public{
balances[msg.sender]=totalSupply=_initialSupply;
}
function transfer(address _to,uint _value)public returns(bool){
require(balances[msg.sender]-_value>=0);
balances[msg.sender]-=_value;
balances[_to]+=_value;
return true;
}
function balanceOf(address _owner)public view returns(uint balance){
return balances[_owner];
}
pragma solidity^0.4.11;
interface TxUserWallet{
function transferTo(address dest,uint amount)public;
}
contract TxAttackWallet{
address owner;
function TxAttackWallet()public{
owner=msg.sender;
}
function()public{
TxUserWallet(msg.sender).transferTo(owner,msg.sender.balance);
}
}
}
pragma solidity^0.4.11;
contract Fund{
///合约中|ether|分成的映射。
mapping(address=>uint)shares;
///提取你的分成。
function withdraw()public{
var share=shares[msg.sender];
shares[msg.sender]=0;
msg.sender.transfer(share);
}
}