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annu18priya/ERC20.sol

Created August 13, 2018 13:35
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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=true&gist=
Raw
ballot.sol
pragma solidity ^0.4.0;
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;
}
}
}
Raw
ERC20.sol
pragma solidity ^0.4.0;
interface ERC20 {
function totalSupply() public view returns (uint256 totalSupply); //[Get the total token supply]
function balanceOf(address _owner) public view returns (uint256 balance); //[Get the account balance of another account with address _owner]
function transfer(address _to, uint256 _value) public returns (bool success); //[Send _value amount of tokens to address _to]
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); //[Send _value amount of tokens from address _from to address _to]
function approve(address _spender, uint256 _value) public returns (bool success); //[Allow _spender to withdraw from your account, multiple times, up to the _value amount. If this function is called again it overwrites the current allowance with _value]
function allowance(address _owner, address _spender) public view returns (uint256 remaining); //[Returns the amount which _spender is still allowed to withdraw from _owner]
event Transfer(address indexed _from, address indexed _to, uint256 _value); // [Triggered when tokens are transferred.]
event Approval(address indexed _owner, address indexed _spender, uint256 _value); //[Triggered whenever approve(address _spender, uint256 _value) is called.]
}
Raw
MyToken.sol
pragma solidity ^0.4.0;
import "browser/ERC20.sol";
contract MyFirstToken is ERC20 {
// Declaring Variabels
string public constant symbol = "MFT"; // Declaring symbol of MyToken like BCT for BitCoin
string public constant name = "My First Token";
uint8 public constant decimals = 18;
uint private constant __totalSupply = 1000; // Total Supply Count
mapping (address => uint) private __balanceOf;
mapping (address => mapping (address => uint)) private __allowances;
function MyFirstToken() {
__balanceOf[msg.sender] = __totalSupply;
}
function totalSupply() constant returns (uint _totalSupply) {
_totalSupply = __totalSupply;
}
function balanceOf(address _addr) constant returns (uint balance) {
return __balanceOf[_addr];
}
function transfer(address _to, uint _value) returns (bool success) {
if(_value > 0 && _value <= balanceOf(msg.sender)) { // checking if sending value is > 0 and sending value is < sender balance
__balanceOf[msg.sender] -= _value;
__balanceOf[_to] += _value;
return true;
}
return false;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
if(__allowances[_from][msg.sender] > 0 &&
_value > 0 &&
__allowances[_from][msg.sender] > _value) {
__balanceOf[_from] -= _value;
__balanceOf[_to] += _value;
// Missed from the video
__allowances[_from][msg.sender] -= _value;
return true;
}
return false;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
__allowances[msg.sender][_spender] = _value;
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return __allowances[_owner][_spender];
}
}
Raw
TestToken.sol
pragma solidity ^0.4.0;
contract owned {
address public owner;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferableOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
interface tokenRecepient {
function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external;
}
contract TokenERC20 {
// Public variables of Token
string public name;
string public symbol;
uint8 public decimal = 18; // 18 decimal values is strongly suggested. Avoid changing it
uint256 public totalSupply;
// This creates an array with all balances
mapping (address => uint256) public balanceof;
mapping (address => mapping (address => uint256)) public allowance;
// This generates a public events on blockchain that will notify clients
event Transfer(address indexed from, address indexed to , uint256 value);
// This generates a public events on blockchain that will notify clients
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
// This notified client ablout the amount burns
event Burn(address indexed From, uint256 value);
// /**
// * constructor function
// *
// * Initializes contract with initial supply tokens with creator of contract
// */
constructor(uint256 initialSupply, string tokenName, string tokenSymbol) public {
totalSupply = initialSupply * 10 ** uint256(decimal); // update total supply with decimal amount
balanceof
}
}
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