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6
README.md
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@ -4,8 +4,8 @@
An upgradeable Ethereum ERC20 token minted by my cat, Karma. An upgradeable Ethereum ERC20 token minted by my cat, Karma.
[Ropsten Karma Token](https://ropsten.etherscan.io/token/0x438B6a24d3581c379F51Ae389bf37236ae94BEA8) [Ropsten Token](https://ropsten.etherscan.io/token/0xdCDA9d33Eb6eEf5C748743Bb1e2B7FBFBc500904)
[Ropsten TransparentUpgradeableProxy Contract](https://ropsten.etherscan.io/address/0x438B6a24d3581c379F51Ae389bf37236ae94BEA8#readProxyContract) [Ropsten Contract](https://ropsten.etherscan.io/address/0xdCDA9d33Eb6eEf5C748743Bb1e2B7FBFBc500904)
[Karma Contract](https://ropsten.etherscan.io/address/0x957684dC3De2b93154b2561c7bC96875306E39A0#code) [Current KarmaV3 Contract](https://ropsten.etherscan.io/address/0x9e3be3194de7a033f82e7ac121b1036dd817f4c7#code)

479
contracts/karma-1-ERC20.sol
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@ -1,485 +1,14 @@
// Copyright [2021] - [2021], [Shaun Reed] and [Karma] contributors // Copyright [2021] - [2021], [Shaun Reed] and [Karma] contributors
// SPDX-License-Identifier: MIT // SPDX-License-Identifier: MIT
pragma solidity >= 0.8.0;
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------
// Import ERC Token Standard #20 Interface // Import ERC Token Standard #20 Interface
// ETH EIP repo: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md // ETH EIP repo: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------
pragma solidity ^0.8.0; import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
/**
* @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 // Karma Contract

28
contracts/karma-2-ERC20.sol Normal file
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@ -0,0 +1,28 @@
// 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-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
// ----------------------------------------------------------------------------
// Karma Contract
// ----------------------------------------------------------------------------
contract KarmaV2 is Initializable, ERC20Upgradeable
{
function initialize(string memory name, string memory symbol, uint256 initialSupply) public virtual initializer {
__ERC20_init(name, symbol);
_mint(_msgSender(), initialSupply);
}
function isToken() public returns (bool)
{
return true;
}
}

34
contracts/karma-3-ERC20.sol Normal file
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@ -0,0 +1,34 @@
// 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-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
// ----------------------------------------------------------------------------
// Karma Contract
// ----------------------------------------------------------------------------
contract KarmaV3 is Initializable, ERC20Upgradeable
{
function initialize(string memory name, string memory symbol, uint256 initialSupply) public virtual initializer {
__ERC20_init(name, symbol);
_mint(_msgSender(), initialSupply);
}
function isToken() public pure returns (bool)
{
return true;
}
function getAddress() public view returns (address)
{
return address(this);
}
}

9
migrations/4_upgrade_karma.js Normal file
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@ -0,0 +1,9 @@
const { upgradeProxy } = require('@openzeppelin/truffle-upgrades');
const Karma = artifacts.require('Karma');
const KarmaV2 = artifacts.require('KarmaV2');
module.exports = async function (deployer) {
const existing = await Karma.deployed();
await upgradeProxy(existing.address, KarmaV2, { deployer });
};

9
migrations/5_upgrade_karma.js Normal file
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@ -0,0 +1,9 @@
const { upgradeProxy } = require('@openzeppelin/truffle-upgrades');
const KarmaV2 = artifacts.require('KarmaV2');
const KarmaV3 = artifacts.require('KarmaV3');
module.exports = async function (deployer) {
const existing = await KarmaV2.deployed();
await upgradeProxy(existing.address, KarmaV3, { deployer });
};

9
package-lock.json generated
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@ -5,6 +5,7 @@
"requires": true, "requires": true,
"packages": { "packages": {
"": { "": {
"name": "karma",
"version": "1.0.0", "version": "1.0.0",
"license": "MIT", "license": "MIT",
"devDependencies": { "devDependencies": {
@ -7904,7 +7905,6 @@
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} }
@ -14144,7 +14144,6 @@
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"dev": true, "dev": true,
"hasInstallScript": true,
"dependencies": { "dependencies": {
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"dev": true, "dev": true,
"hasInstallScript": true,
"optional": true, "optional": true,
"dependencies": { "dependencies": {
"abstract-leveldown": "~6.0.0", "abstract-leveldown": "~6.0.0",
@ -20149,7 +20147,6 @@
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"dev": true, "dev": true,
"hasInstallScript": true,
"dependencies": { "dependencies": {
"elliptic": "^6.5.2", "elliptic": "^6.5.2",
"node-addon-api": "^2.0.0", "node-addon-api": "^2.0.0",
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"dev": true, "dev": true,
"hasInstallScript": true,
"optional": true, "optional": true,
"dependencies": { "dependencies": {
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"dev": true, "dev": true,
"hasInstallScript": true,
"optional": true, "optional": true,
"dependencies": { "dependencies": {
"bindings": "^1.3.0", "bindings": "^1.3.0",
@ -22437,7 +22432,6 @@
"resolved": "https://registry.npmjs.org/ursa-optional/-/ursa-optional-0.10.2.tgz", "resolved": "https://registry.npmjs.org/ursa-optional/-/ursa-optional-0.10.2.tgz",
"integrity": "sha512-TKdwuLboBn7M34RcvVTuQyhvrA8gYKapuVdm0nBP0mnBc7oECOfUQZrY91cefL3/nm64ZyrejSRrhTVdX7NG/A==", "integrity": "sha512-TKdwuLboBn7M34RcvVTuQyhvrA8gYKapuVdm0nBP0mnBc7oECOfUQZrY91cefL3/nm64ZyrejSRrhTVdX7NG/A==",
"dev": true, "dev": true,
"hasInstallScript": true,
"optional": true, "optional": true,
"dependencies": { "dependencies": {
"bindings": "^1.5.0", "bindings": "^1.5.0",
@ -22452,7 +22446,6 @@
"resolved": "https://registry.npmjs.org/utf-8-validate/-/utf-8-validate-5.0.4.tgz", "resolved": "https://registry.npmjs.org/utf-8-validate/-/utf-8-validate-5.0.4.tgz",
"integrity": "sha512-MEF05cPSq3AwJ2C7B7sHAA6i53vONoZbMGX8My5auEVm6W+dJ2Jd/TZPyGJ5CH42V2XtbI5FD28HeHeqlPzZ3Q==", "integrity": "sha512-MEF05cPSq3AwJ2C7B7sHAA6i53vONoZbMGX8My5auEVm6W+dJ2Jd/TZPyGJ5CH42V2XtbI5FD28HeHeqlPzZ3Q==",
"dev": true, "dev": true,
"hasInstallScript": true,
"dependencies": { "dependencies": {
"node-gyp-build": "^4.2.0" "node-gyp-build": "^4.2.0"
} }

15
test/Karma.proxy.test.js
View File

@ -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();
});
});

8
truffle-config.js
View File

@ -99,10 +99,10 @@ module.exports = {
version: "0.8.0", // Fetch exact version from solc-bin (default: truffle's version) 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) // 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 // settings: { // See the solidity docs for advice about optimization and evmVersion
optimizer: { // optimizer: {
enabled: true, // enabled: false,
runs: 200 // runs: 200
}, // },
// evmVersion: "byzantium" // evmVersion: "byzantium"
// } // }
} }