Browse Source
+ Use proxy pattern to deploy upgradeable ERC20 token to ropsten + Remove unused `.openzeppelin/` directorymaster
16 changed files with 24577 additions and 184 deletions
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// Copyright [2021] - [2021], [Shaun Reed] and [Karma] contributors |
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// SPDX-License-Identifier: MIT |
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pragma solidity >= 0.8.0; |
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// ---------------------------------------------------------------------------- |
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// Import ERC Token Standard #20 Interface |
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// ETH EIP repo: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md |
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// ---------------------------------------------------------------------------- |
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import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol"; |
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import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; |
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// ---------------------------------------------------------------------------- |
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// Karma Contract |
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// ---------------------------------------------------------------------------- |
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contract Karma is Initializable, ERC20Upgradeable |
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{ |
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function initialize(string memory name, string memory symbol, uint256 initialSupply) public virtual initializer { |
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__ERC20_init(name, symbol); |
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_mint(_msgSender(), initialSupply); |
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} |
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} |
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// Copyright [2021] - [2021], [Shaun Reed] and [Karma] contributors |
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// SPDX-License-Identifier: MIT |
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pragma solidity >= 0.8.0; |
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// ---------------------------------------------------------------------------- |
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// Import ERC Token Standard #20 Interface |
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// ETH EIP repo: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md |
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// ---------------------------------------------------------------------------- |
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import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol"; |
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import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; |
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// ---------------------------------------------------------------------------- |
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// Karma Contract |
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// ---------------------------------------------------------------------------- |
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contract KarmaV2 is Initializable, ERC20Upgradeable |
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{ |
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function initialize(string memory name, string memory symbol, uint256 initialSupply) public virtual initializer { |
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__ERC20_init(name, symbol); |
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_mint(_msgSender(), initialSupply); |
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} |
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function isToken() public returns (bool) |
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{ |
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return true; |
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} |
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} |
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// Copyright [2021] - [2021], [Shaun Reed] and [Karma] contributors |
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// SPDX-License-Identifier: MIT |
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pragma solidity >= 0.8.0; |
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// ---------------------------------------------------------------------------- |
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// Import ERC Token Standard #20 Interface |
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// ETH EIP repo: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md |
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// ---------------------------------------------------------------------------- |
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import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol"; |
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import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; |
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// ---------------------------------------------------------------------------- |
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// Karma Contract |
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// ---------------------------------------------------------------------------- |
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contract KarmaV3 is Initializable, ERC20Upgradeable |
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{ |
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function initialize(string memory name, string memory symbol, uint256 initialSupply) public virtual initializer { |
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__ERC20_init(name, symbol); |
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_mint(_msgSender(), initialSupply); |
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} |
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function isToken() public pure returns (bool) |
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{ |
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return true; |
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} |
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function getAddress() public view returns (address) |
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{ |
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return address(this); |
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} |
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} |
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// Copyright [2021] - [2021], [Shaun Reed] and [Karma] contributors |
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// SPDX-License-Identifier: MIT |
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pragma solidity >= 0.8.0; |
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// ---------------------------------------------------------------------------- |
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// Import ERC Token Standard #20 Interface |
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// ETH EIP repo: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md |
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// ---------------------------------------------------------------------------- |
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import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; |
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// ---------------------------------------------------------------------------- |
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// SourceCoin Contract |
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// ---------------------------------------------------------------------------- |
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contract Karma is IERC20 |
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{ |
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string public name; |
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string public symbol; |
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uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it |
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uint256 public _totalSupply; |
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// Balances for each account; A hashmap using wallet address as key and uint as value |
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mapping(address => uint) balances; |
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// Owner of account approves the transfer of an amount to another account |
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mapping(address => mapping(address => uint)) allowed; |
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/** |
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* Constrctor function |
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* |
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* Initializes contract with initial supply tokens to the creator of the contract |
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*/ |
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constructor() |
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{ |
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name = "Karma"; // Name of the token |
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symbol = "KRMA"; // Abbreviation of the token |
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decimals = 18; // Number of decimals that can be used to split token |
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// FORMAT: <SUPPLY><DECIMALS> |
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// Where SUPPLY is the number of coins in base 10 decimal notation |
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// And DECIMALS is a trailing number of 0's; Count must match `decimals` value set above |
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// 1000 000 000 000000000000000000 == 1 billion total supply; |
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// + trailing 0's represent the 18 decimal locations that can be used to send fractions |
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_totalSupply = 1000000000000000000000000000; |
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// Set the remaining balance of the contract owner to the total supply |
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balances[msg.sender] = _totalSupply; // msg.sender is the calling address for this constructor |
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// Transfer the total supply to the contract owner on initialization |
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emit Transfer(address(0), msg.sender, _totalSupply); // address(0) is used to represent a new TX |
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} |
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// Get the total circulating supply of the token |
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function totalSupply() public override view returns (uint) |
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{ |
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// By subtracting from tokens held at address(0), we provide an address to 'burn' the supply |
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return _totalSupply - balances[address(0)]; // Subtract from tokens held at address(0) |
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} |
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// Get the token balance for account `tokenOwner` |
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function balanceOf(address tokenOwner) public override view returns (uint balance) |
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{ |
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return balances[tokenOwner]; // Return the balance of the owner's address |
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} |
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/// @param tokenOwner The address of the account owning tokens |
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/// @param spender The address of the account able to transfer the tokens |
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/// returns Amount of remaining tokens allowed to spent |
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function allowance(address tokenOwner, address spender) public override view returns (uint remaining) |
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{ |
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return allowed[tokenOwner][spender]; |
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} |
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// Allow `spender` to withdraw from your account, multiple times, up to the `tokens` |
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// If this function is called again it overwrites the current allowance with _value. |
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function approve(address spender, uint tokens) public override returns (bool success) |
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{ |
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allowed[msg.sender][spender] = tokens; |
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emit Approval(msg.sender, spender, tokens); |
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return true; |
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} |
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// Transfer the balance from owner's account to another account |
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function transfer(address to, uint tokens) public override returns (bool success) |
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{ |
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balances[msg.sender] = balances[msg.sender] - tokens; |
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balances[to] = balances[to] + tokens; |
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emit Transfer(msg.sender, to, tokens); |
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return true; |
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} |
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// Send `tokens` amount of tokens from address `from` to address `to` |
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// The transferFrom method is used for a withdraw workflow, allowing contracts to send |
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// tokens on your behalf, for example to "deposit" to a contract address and/or to charge |
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// fees in sub-currencies; the command should fail unless the _from account has |
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// deliberately authorized the sender of the message via some mechanism; we propose |
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// these standardized APIs for approval: |
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function transferFrom(address from, address to, uint tokens) public override returns (bool success) |
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{ |
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balances[from] = balances[from] - tokens; |
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allowed[from][msg.sender] = allowed[from][msg.sender] - tokens; |
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balances[to] = balances[to] - tokens; |
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emit Transfer(from, to, tokens); |
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return true; |
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} |
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} |
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const Karma = artifacts.require("Karma"); |
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module.exports = function (deployer) { |
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deployer.deploy(Karma); |
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}; |
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const Karma = artifacts.require('Karma'); |
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module.exports = async function (deployer) { |
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await deployer.deploy(Karma); |
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}; |
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const Karma = artifacts.require('Karma'); |
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const { deployProxy } = require('@openzeppelin/truffle-upgrades'); |
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module.exports = async function (deployer) { |
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await deployProxy( |
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Karma, |
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['Karma', 'KRMA', '1000000000000000000000000000'], |
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{ deployer, initializer: 'initialize' } |
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); |
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}; |
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const { upgradeProxy } = require('@openzeppelin/truffle-upgrades'); |
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const Karma = artifacts.require('Karma'); |
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const KarmaV2 = artifacts.require('KarmaV2'); |
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module.exports = async function (deployer) { |
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const existing = await Karma.deployed(); |
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await upgradeProxy(existing.address, KarmaV2, { deployer }); |
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}; |
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const { upgradeProxy } = require('@openzeppelin/truffle-upgrades'); |
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const KarmaV2 = artifacts.require('KarmaV2'); |
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const KarmaV3 = artifacts.require('KarmaV3'); |
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module.exports = async function (deployer) { |
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const existing = await KarmaV2.deployed(); |
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await upgradeProxy(existing.address, KarmaV3, { deployer }); |
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}; |
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