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3
.gitignore vendored
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@ -3,5 +3,4 @@ build/
cache/
node_modules/
.idea/
temp/
.openzeppelin/

8
README.md
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@ -2,10 +2,6 @@
![Karmatoken](karmatoken.jpg)
An upgradeable Ethereum ERC20 token minted by my cat, Karma.
An Ethereum ERC20 token minted by my cat, Karma.
[Ropsten Karma Token](https://ropsten.etherscan.io/token/0x438B6a24d3581c379F51Ae389bf37236ae94BEA8)
[Ropsten TransparentUpgradeableProxy Contract](https://ropsten.etherscan.io/address/0x438B6a24d3581c379F51Ae389bf37236ae94BEA8#readProxyContract)
[Karma Contract](https://ropsten.etherscan.io/address/0x957684dC3De2b93154b2561c7bC96875306E39A0#code)
[Ropsten ERC20 Token](https://ropsten.etherscan.io/token/0x5Fd2d64C7223D2D67eA287EA1c4Cb95e03209c84)

6
contracts/Migrations.sol
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@ -1,7 +1,6 @@
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;
// https://www.trufflesuite.com/docs/truffle/getting-started/running-migrations#initial-migration
contract Migrations {
address public owner = msg.sender;
uint public last_completed_migration;
@ -11,13 +10,10 @@ contract Migrations {
msg.sender == owner,
"This function is restricted to the contract's owner"
);
_; // Execute the body of the function
_;
}
// A function with the signature `setCompleted(uint)` is required.
// + Restrict this call to the owner of this Migration contract
function setCompleted(uint completed) public restricted {
last_completed_migration = completed;
}
}

494
contracts/karma-1-ERC20.sol
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@ -1,494 +0,0 @@
// Copyright [2021] - [2021], [Shaun Reed] and [Karma] contributors
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
// Import ERC Token Standard #20 Interface
// ETH EIP repo: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
// ----------------------------------------------------------------------------
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20MetadataUpgradeable is IERC20Upgradeable {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
uint256[45] private __gap;
}
// ----------------------------------------------------------------------------
// Karma Contract
// ----------------------------------------------------------------------------
contract Karma is Initializable, ERC20Upgradeable
{
function initialize(string memory name, string memory symbol, uint256 initialSupply) public virtual initializer {
__ERC20_init(name, symbol);
_mint(_msgSender(), initialSupply);
}
}

110
contracts/karma-ERC20.sol Normal file
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@ -0,0 +1,110 @@
// Copyright [2021] - [2021], [Shaun Reed] and [Karma] contributors
// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.0;
// ----------------------------------------------------------------------------
// Import ERC Token Standard #20 Interface
// ETH EIP repo: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
// ----------------------------------------------------------------------------
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
// ----------------------------------------------------------------------------
// SourceCoin Contract
// ----------------------------------------------------------------------------
contract Karma is IERC20
{
string public name;
string public symbol;
uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
uint256 public _totalSupply;
// Balances for each account; A hashmap using wallet address as key and uint as value
mapping(address => uint) balances;
// Owner of account approves the transfer of an amount to another account
mapping(address => mapping(address => uint)) allowed;
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor()
{
name = "Karma"; // Name of the token
symbol = "KRMA"; // Abbreviation of the token
decimals = 18; // Number of decimals that can be used to split token
// FORMAT: <SUPPLY><DECIMALS>
// Where SUPPLY is the number of coins in base 10 decimal notation
// And DECIMALS is a trailing number of 0's; Count must match `decimals` value set above
// 1000 000 000 000000000000000000 == 1 billion total supply;
// + trailing 0's represent the 18 decimal locations that can be used to send fractions
_totalSupply = 1000000000000000000000000000;
// Set the remaining balance of the contract owner to the total supply
balances[msg.sender] = _totalSupply; // msg.sender is the calling address for this constructor
// Transfer the total supply to the contract owner on initialization
emit Transfer(address(0), msg.sender, _totalSupply); // address(0) is used to represent a new TX
}
// Get the total circulating supply of the token
function totalSupply() public override view returns (uint)
{
// By subtracting from tokens held at address(0), we provide an address to 'burn' the supply
return _totalSupply - balances[address(0)]; // Subtract from tokens held at address(0)
}
// Get the token balance for account `tokenOwner`
function balanceOf(address tokenOwner) public override view returns (uint balance)
{
return balances[tokenOwner]; // Return the balance of the owner's address
}
/// @param tokenOwner The address of the account owning tokens
/// @param spender The address of the account able to transfer the tokens
/// returns Amount of remaining tokens allowed to spent
function allowance(address tokenOwner, address spender) public override view returns (uint remaining)
{
return allowed[tokenOwner][spender];
}
// Allow `spender` to withdraw from your account, multiple times, up to the `tokens`
// If this function is called again it overwrites the current allowance with _value.
function approve(address spender, uint tokens) public override returns (bool success)
{
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// Transfer the balance from owner's account to another account
function transfer(address to, uint tokens) public override returns (bool success)
{
balances[msg.sender] = balances[msg.sender] - tokens;
balances[to] = balances[to] + tokens;
emit Transfer(msg.sender, to, tokens);
return true;
}
// Send `tokens` amount of tokens from address `from` to address `to`
// The transferFrom method is used for a withdraw workflow, allowing contracts to send
// tokens on your behalf, for example to "deposit" to a contract address and/or to charge
// fees in sub-currencies; the command should fail unless the _from account has
// deliberately authorized the sender of the message via some mechanism; we propose
// these standardized APIs for approval:
function transferFrom(address from, address to, uint tokens) public override returns (bool success)
{
balances[from] = balances[from] - tokens;
allowed[from][msg.sender] = allowed[from][msg.sender] - tokens;
balances[to] = balances[to] - tokens;
emit Transfer(from, to, tokens);
return true;
}
}

5
migrations/2_deploy.js Normal file
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@ -0,0 +1,5 @@
const Karma = artifacts.require("Karma");
module.exports = function (deployer) {
deployer.deploy(Karma);
};

5
migrations/2_deploy_karma.js
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@ -1,5 +0,0 @@
const Karma = artifacts.require('Karma');
module.exports = async function (deployer) {
await deployer.deploy(Karma);
};

11
migrations/3_deploy_proxy.js
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@ -1,11 +0,0 @@
const Karma = artifacts.require('Karma');
const { deployProxy } = require('@openzeppelin/truffle-upgrades');
module.exports = async function (deployer) {
await deployProxy(
Karma,
['Karma', 'KRMA', '1000000000000000000000000000'],
{ deployer, initializer: 'initialize' }
);
};

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package-lock.json generated
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4
package.json
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@ -11,12 +11,8 @@
"license": "MIT",
"devDependencies": {
"@openzeppelin/contracts": "^4.0.0",
"@openzeppelin/contracts-upgradeable": "^4.1.0",
"@openzeppelin/truffle-upgrades": "^1.6.0",
"@truffle/hdwallet-provider": "^1.3.0",
"chai": "^4.3.4",
"truffle": "^5.3.3",
"truffle-flattener": "^1.5.0",
"truffle-plugin-verify": "^0.5.7"
}
}

15
test/Karma.proxy.test.js
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@ -1,15 +0,0 @@
// Load dependencies
const { expect } = require('chai');
const { deployProxy, upgradeProxy} = require('@openzeppelin/truffle-upgrades');
// Load compiled artifacts
const Karma = artifacts.require('Karma');
// Start test block
contract('Karma (proxy)', function () {
// Test case
it('Karma deploys successfully', async function () {
// Increment
const karma = await Karma.new();
});
});

0
test/KarmaV2.proxy.test.js
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21
truffle-config.js
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@ -49,11 +49,11 @@ module.exports = {
// tab if you use this network and you must also set the `host`, `port` and `network_id`
// options below to some value.
//
development: {
host: "127.0.0.1", // Localhost (default: none)
port: 8545, // Standard Ethereum port (default: none)
network_id: "*", // Any network (default: none)
},
// development: {
// host: "127.0.0.1", // Localhost (default: none)
// port: 8545, // Standard Ethereum port (default: none)
// network_id: "*", // Any network (default: none)
// },
// Another network with more advanced options...
// advanced: {
// port: 8777, // Custom port
@ -99,10 +99,10 @@ module.exports = {
version: "0.8.0", // Fetch exact version from solc-bin (default: truffle's version)
// docker: true, // Use "0.5.1" you've installed locally with docker (default: false)
// settings: { // See the solidity docs for advice about optimization and evmVersion
optimizer: {
enabled: true,
runs: 200
},
// optimizer: {
// enabled: false,
// runs: 200
// },
// evmVersion: "byzantium"
// }
}
@ -116,6 +116,5 @@ module.exports = {
db: {
enabled: false
},
}
};