[区块链]以太坊智能合约--简单众筹项目

以太坊智能合约–简单众筹项目

实验使用remix编译和metamask钱包

pragma solidity ^0.4.0;

contract crowd-funding{//众筹项目

    struct funder{
        address Funderaddress;//捐赠者地址
        uint Tomoney;//捐献了多少笔钱
    }

    struct needer{
        address Neederaddress;//受益者地址
        uint goal;//目标资金
        uint amount;//已经募集的资金

        uint FunderAccount;//捐赠者数量
        mapping(uint => funder) map;

    }
    uint NeederAmount;
    mapping(uint=>needer) needmap;

    function NewNeeder(address _Neederaddress, uint _goal ){
        NeederAmount++;
        needmap[NeederAmount] =needer(_Neederaddress,_goal,0,0);
    }

    function contribute(address _address,uint _NeederAmount) payable{
        needer storage _needer = needmap[_NeederAmount];
        _needer.amount += msg.value;
        _needer.FunderAccount++;
        _needer.map[_needer.FunderAccount] = funder( _address, msg.value);
    }

    function IScomplete(uint _NeederAmount){//转账
        needer storage _needer = needmap[_NeederAmount];

        if(_needer.amount >= _needer.goal){
            _needer.Neederaddress.transfer(_needer.amount);
        }
    }
}

完成后点击deploy部署
在下面输入相应参数，地址使用任意的本地地址

在value中输入捐赠的数额
图中最后一个为受益者地址