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Add the following to "dapp -- Resources" | |
* JavaScript: https://code.jquery.com/jquery-3.4.1.min.js | |
* CSS: https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css | |
The "dapp -- CSS" should be empty |
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<div class="container"> | |
<br/> | |
<div class="jumbotron"> | |
<p class="lead" id="greeting"></p> | |
<div id="imageDiv" style="display:none"> | |
<img id="image" src="" class="img-fluid img-thumbnail"/> | |
</div> | |
<hr/> | |
<p id="votes" style="display:none"> | |
<span id="ups"></span> voted π | | |
<span id="downs"></span> voted π | |
</p> | |
<form id="form" class="form-inline" style="display:none"> | |
<button id="voteUp" onclick="vote(1);" class="btn btn-primary mb-2">π</button> | |
<button id="voteDown" onclick="vote(-1);" class="btn btn-primary mb-2">π</button> | |
</form> | |
<div id="myVoteUp" style="display:none">You have already voted π</div> | |
<div id="myVoteDown" style="display:none">You have already voted π</div> | |
</div> | |
</div> |
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var contract = window.web3 && web3.ss && web3.ss.contract(abi); | |
var instance = contract && contract.at(cAddr); | |
window.addEventListener('web3Ready', function() { | |
contract = web3.ss.contract(abi); | |
instance = contract.at(cAddr); | |
reload(); | |
}); | |
function reload() { | |
instance.greeting(function (e, r) { | |
$("#greeting").html(r); | |
}); | |
instance.photoUrl(function (e, r) { | |
if (!e && r) { | |
$("#imageDiv").css("display", "block"); | |
$("#image").attr("src", r); | |
} | |
}); | |
instance.getVotes(function (e, r) { | |
if (!e && (r[0] > 0 || r[1] > 0)) { | |
$("#votes").css("display", "block"); | |
$("#ups").text(r[0]); | |
$("#downs").text(r[1]); | |
} | |
}); | |
web3.ss.getAccounts(function (e, address) { | |
if (!e) { | |
instance.getVote(address, function (ee, r) { | |
$("#form").css("display", "none"); | |
if (r == 1) { | |
$("#myVoteUp").css("display", "block"); | |
} else if (r == -1) { | |
$("#myVoteDown").css("display", "block"); | |
} else { | |
$("#form").css("display", "block"); | |
} | |
}); | |
} | |
}); | |
} | |
function vote (choice) { | |
web3.ss.getAccounts(function (e, address) { | |
if (!e) { | |
$("#form").html("<p>Wait for 20 seconds ...</p>"); | |
instance.vote(choice, { | |
gas: 400000, | |
gasPrice: 0 | |
}, function (e, result) { | |
if (e) { | |
window.alert("Failed. Check if there is at least 0.1 ETC (for gas fee) in your account " + address); | |
} | |
}); | |
setTimeout(function () { | |
reload (); | |
}, 20 * 1000); | |
} | |
}); | |
return false; | |
} |
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pragma solidity >= 0.4.0; | |
contract Vote { | |
string public greeting; | |
string public photoUrl; | |
mapping (address => int) votes; | |
uint ups; | |
uint downs; | |
constructor(string _greeting, string _photoUrl) public { | |
greeting = _greeting; | |
photoUrl = _photoUrl; | |
} | |
function vote (int _choice) public { | |
require (votes[msg.sender] == 0); | |
require (_choice == 1 || _choice == -1); | |
votes[msg.sender] = _choice; | |
if (_choice == 1) ups++; | |
if (_choice == -1) downs++; | |
} | |
function getVotes () view public returns (uint, uint) { | |
return (ups, downs); | |
} | |
function getVote (address _addr) view public returns (int) { | |
return votes[_addr]; | |
} | |
} |
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pragma solidity >= 0.4.0; | |
contract Vote { | |
string public greeting; | |
string public photoUrl; | |
mapping (address => int) votes; | |
uint ups; | |
uint downs; | |
function Vote (string _greeting, string _photoUrl) public { | |
greeting = _greeting; | |
photoUrl = _photoUrl; | |
} | |
function vote (int _choice) public { | |
if (votes[msg.sender] != 0) { throw; } | |
if (_choice != 1 && _choice != -1) { throw; } | |
votes[msg.sender] = _choice; | |
if (_choice == 1) ups++; | |
if (_choice == -1) downs++; | |
} | |
function getVotes () public constant returns (uint, uint) { | |
return (ups, downs); | |
} | |
function getVote (address _addr) public constant returns (int) { | |
return votes[_addr]; | |
} | |
} |
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