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June 5, 2018 12:53
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Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.4.24+commit.e67f0147.js&optimize=false&gist=
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| contract Ballot { | |
| struct Voter { | |
| uint weight; | |
| bool voted; | |
| uint8 vote; | |
| address delegate; | |
| } | |
| struct Proposal { | |
| uint voteCount; | |
| } | |
| address chairperson; | |
| mapping(address => Voter) voters; | |
| Proposal[] proposals; | |
| /// Create a new ballot with $(_numProposals) different proposals. | |
| function Ballot(uint8 _numProposals) public { | |
| chairperson = msg.sender; | |
| voters[chairperson].weight = 1; | |
| proposals.length = _numProposals; | |
| } | |
| /// Give $(toVoter) the right to vote on this ballot. | |
| /// May only be called by $(chairperson). | |
| function giveRightToVote(address toVoter) public { | |
| if (msg.sender != chairperson || voters[toVoter].voted) return; | |
| voters[toVoter].weight = 1; | |
| } | |
| /// Delegate your vote to the voter $(to). | |
| function delegate(address to) public { | |
| Voter storage sender = voters[msg.sender]; // assigns reference | |
| if (sender.voted) return; | |
| while (voters[to].delegate != address(0) && voters[to].delegate != msg.sender) | |
| to = voters[to].delegate; | |
| if (to == msg.sender) return; | |
| sender.voted = true; | |
| sender.delegate = to; | |
| Voter storage delegateTo = voters[to]; | |
| if (delegateTo.voted) | |
| proposals[delegateTo.vote].voteCount += sender.weight; | |
| else | |
| delegateTo.weight += sender.weight; | |
| } | |
| /// Give a single vote to proposal $(toProposal). | |
| function vote(uint8 toProposal) public { | |
| Voter storage sender = voters[msg.sender]; | |
| if (sender.voted || toProposal >= proposals.length) return; | |
| sender.voted = true; | |
| sender.vote = toProposal; | |
| proposals[toProposal].voteCount += sender.weight; | |
| } | |
| function winningProposal() public constant returns (uint8 _winningProposal) { | |
| uint256 winningVoteCount = 0; | |
| for (uint8 prop = 0; prop < proposals.length; prop++) | |
| if (proposals[prop].voteCount > winningVoteCount) { | |
| winningVoteCount = proposals[prop].voteCount; | |
| _winningProposal = prop; | |
| } | |
| } | |
| } |
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| pragma solidity ^0.4.20; | |
| contract MyToken { | |
| /* This creates an array with all balances */ | |
| mapping (address => uint256) public balanceOf; | |
| /* Initializes contract with initial supply tokens to the creator of the contract */ | |
| function MyToken( | |
| uint256 initialSupply | |
| ) public { | |
| balanceOf[msg.sender] = initialSupply; // Give the creator all initial tokens | |
| } | |
| /* Send coins */ | |
| function transfer(address _to, uint256 _value) public { | |
| require(balanceOf[msg.sender] >= _value); // Check if the sender has enough | |
| require(balanceOf[_to] + _value >= balanceOf[_to]); // Check for overflows | |
| balanceOf[msg.sender] -= _value; // Subtract from the sender | |
| balanceOf[_to] += _value; // Add the same to the recipient | |
| } | |
| } |
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