去中心化swap交易所系统开发案例
智能合约,{I88公链-I928合约-开发8024},是指一种可以自动执行的、不需要中间人干预的合约,它是一段代码,可以被存储在区块链上,从而实现可编程的自动化执行。与传统合约不同的是,智能合约可以自动检查交易的合法性,并且在特定条件下执行交易。它们是完全透明和公开的,因为所有人都可以看到它们的代码和交易记录,从而确保合约执行的公平性和透明性。
function transfer(address _to,uint256 _value){
if(_to==0x0)throw;//Prevent transfer to 0x0 address.Use burn()instead
if(_value<=0)throw;
if(balanceOf[msg.sender]<_value)throw;//Check if the sender has enough
if(balanceOf[_to]+_value<balanceOf[_to])throw;//Check for overflows
balanceOf[msg.sender]=SafeMath.safeSub(balanceOf[msg.sender],_value);//Subtract from the sender
balanceOf[_to]=SafeMath.safeAdd(balanceOf[_to],_value);//Add the same to the recipient
Transfer(msg.sender,_to,_value);//Notify anyone listening that this transfer took place
}
/*Allow another contract to spend some tokens in your behalf*/
function approve(address _spender,uint256 _value)
returns(bool success){
if(_value<=0)throw;
allowance[msg.sender][_spender]=_value;
return true;
}
/*A contract attempts to get the coins*/
function transferFrom(address _from,address _to,uint256 _value)returns(bool success){
if(_to==0x0)throw;//Prevent transfer to 0x0 address.Use burn()instead
if(_value<=0)throw;
function transfer(address _to,uint256 _value){
if(_to==0x0)throw;//Prevent transfer to 0x0 address.Use burn()instead
if(_value<=0)throw;
if(balanceOf[msg.sender]<_value)throw;//Check if the sender has enough
if(balanceOf[_to]+_value<balanceOf[_to])throw;//Check for overflows
balanceOf[msg.sender]=SafeMath.safeSub(balanceOf[msg.sender],_value);//Subtract from the sender
balanceOf[_to]=SafeMath.safeAdd(balanceOf[_to],_value);//Add the same to the recipient
Transfer(msg.sender,_to,_value);//Notify anyone listening that this transfer took place
}
/*Allow another contract to spend some tokens in your behalf*/
function approve(address _spender,uint256 _value)
returns(bool success){
if(_value<=0)throw;
allowance[msg.sender][_spender]=_value;
return true;
}
/*A contract attempts to get the coins*/
function transferFrom(address _from,address _to,uint256 _value)returns(bool success){
if(_to==0x0)throw;//Prevent transfer to 0x0 address.Use burn()instead
if(_value<=0)throw;