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Update to @openzeppelin/contracts-upgradeable from @openzeppelin/contracts

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Shaun Reed
2021-05-04 20:56:53 -04:00
parent ebb4e5a2d5
commit a9784bb02c
8 changed files with 210 additions and 147 deletions
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28
contracts/karma-1-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;
}
}

134
contracts/karma-ERC20.sol
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@@ -7,136 +7,18 @@ 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";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
// ----------------------------------------------------------------------------
// Karma Contract
// ----------------------------------------------------------------------------
contract Karma is IERC20, Initializable
contract Karma is Initializable, ERC20Upgradeable
{
// Avoid initializing fields in declarations
// https://docs.openzeppelin.com/upgrades-plugins/1.x/writing-upgradeable#avoid-initial-values-in-field-declarations
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
// }
function initialize() public initializer
{
// ERC20 Standard dictates names of these variables
// https://ethereum.org/en/developers/docs/standards/tokens/erc-20/#body
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
function initialize(string memory name, string memory symbol, uint256 initialSupply) public virtual initializer {
__ERC20_init(name, symbol);
_mint(_msgSender(), initialSupply);
}
// 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
}
// To initiate a transaction, we first approve an address to withdraw from our wallet
// + msg.sender is approving spender to withdraw from its balance _value tokens
// 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 _value) public override returns (bool success)
{
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
//if ((value != 0) && (allowed[msg.sender][spender] != 0)) throw;
allowed[msg.sender][spender] = _value;
emit Approval(msg.sender, spender, _value);
return true;
}
// Helper to check the amount of tokens allowed for this spender at this 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];
}
// Send `_value` amount of tokens from address `from` to address `to`
function transferFrom(address from, address to, uint _value) public override returns (bool success)
{
// Set this wallet balance -= _value
balances[from] = balances[from] - _value;
// Update this wallet's approved balance for the withdrawing address
// uint allowance = allowed[from][msg.sender];
allowed[from][msg.sender] -= _value;
// Add the amount of tokens to the balance at the receiving address
balances[to] = balances[to] + _value;
emit Transfer(from, to, _value);
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;
}
}