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// 投票智能合约

pragma solidity ^0.8.0;

contract voting {

mapping(string => uint256) public votes;

function voteforcandidate(string memory candidate) public {

votes[candidate] ;

}

function getvotesforcandidate(string memory candidate) public view returns (uint256) {

return votes[candidate];

}

}

htmlcopy code

<view class="candidate-list">

<view wx:for="{{ candidates }}" wx:key="index">

<text>{{ item }}text>

<button bindtap="voteforcandidate" data-name="{{ item }}">投票button>

view>

const web3 = require('web3');

const web3 = new web3('https://mainnet.infura.io/v3/your_infura_project_id');

const contractaddress = '0xyour_contract_address';

const contractabi = [...]; // 合约abi

data: {

candidates: ['候选人1', '候选人2', '候选人3'],

},

voteforcandidate: function (e) {

const candidatename = e.currenttarget.dataset.name;

const contract = new web3.eth.contract(contractabi, contractaddress);

const account = '0xyour_account_address';

const privatekey = '0xyour_private_key';

const gasprice = '20000000000';

const gaslimit = '210000';

web3.eth.accounts.wallet.add(privatekey);

contract.methods.voteforcandidate(candidatename)

.send({ from: account, gasprice, gaslimit })

.on('receipt', () => {

wx.showtoast({

title: '投票成功',

icon: 'success',

});

})

.on('error', (error) => {

wx.showtoast({

title: '投票失败',

icon: 'none',

});

});

},