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/*
  Copyright 2019-2023 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

import "ERC20.sol";

/*
  Fake MockERC20 proxy.
  Admins can manipulate balances.
  Users can mint for themselves.
*/
contract SelfSufficientERC20 is ERC20 {
    // Simple permissions management.
    mapping(address => bool) admins;
    address owner;
    uint256 max_mint = MAX_MINT;

    uint256 constant MAX_MINT = 10**8; // Default Maximal amount per selfMint transaction.

    function initlialize(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) external onlyOwner {
        require(decimals_ == 0, "ALREADY_INITIALIZED");
        require(_decimals != 0, "ILLEGAL_INIT_VALUE");
        name_ = _name;
        symbol_ = _symbol;
        decimals_ = _decimals;
    }

    constructor() public {
        admins[msg.sender] = true;
        owner = msg.sender;
    }

    modifier onlyAdmin() {
        require(admins[msg.sender], "ONLY_ADMIN");
        _;
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "ONLY_OWNER");
        _;
    }

    function registerAdmin(address newAdmin) external onlyOwner {
        admins[newAdmin] = true;
    }

    function removeAdmin(address oldAdmin) external onlyOwner {
        require(oldAdmin != owner, "OWNER_MUST_REMAIN_ADMIN");
        admins[oldAdmin] = false;
    }

    function transferOwnership(address newOwner) public onlyOwner {
        admins[newOwner] = true;
        owner = newOwner;
    }

    function adminApproval(
        address fundsOwner,
        address spender,
        uint256 value
    ) external onlyAdmin {
        _approve(fundsOwner, spender, value);
    }

    function setBalance(address account, uint256 amount) external onlyAdmin {
        _totalSupply -= _balances[account];
        require(_totalSupply <= _totalSupply + amount, "TOTAL_SUPPLY_OVERFLOW");
        _balances[account] = amount;
        _totalSupply += amount;
    }

    function resetMaxMint(uint256 newMax) external onlyOwner {
        max_mint = newMax;
    }

    function selfMint(uint256 amount) external {
        require(amount <= max_mint, "ILLEGAL_AMOUNT");
        _mint(msg.sender, amount);
    }
}

/*
  Copyright 2019-2023 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

import "IERC20.sol";
import "IERC20Metadata.sol";

abstract contract ERC20 is IERC20, IERC20Metadata {
    mapping(address => uint256) internal _balances;

    mapping(address => mapping(address => uint256)) internal _allowances;

    uint256 internal _totalSupply;
    string internal name_;
    string internal symbol_;
    uint8 internal decimals_;

    function name() external view override returns (string memory) {
        return name_;
    }

    function symbol() external view override returns (string memory) {
        return symbol_;
    }

    function decimals() external view override returns (uint8) {
        return decimals_;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 value) public override returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        uint256 sender_allowance = _allowances[sender][msg.sender];
        require(sender_allowance >= amount, "ERC20: transfer exceeds allowance");
        _approve(sender, msg.sender, sender_allowance - amount);
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        uint256 spender_allowance = _allowances[msg.sender][spender];
        require(spender_allowance + addedValue >= spender_allowance, "ERC20: Overflow");
        _approve(msg.sender, spender, spender_allowance + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        uint256 sender_allowance = _allowances[msg.sender][spender];
        require(sender_allowance >= subtractedValue, "ERC20: transfer exceeds allowance");
        _approve(msg.sender, spender, sender_allowance - subtractedValue);
        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        uint256 sender_balance = _balances[sender];
        uint256 recipient_balance = _balances[recipient];
        require(sender_balance >= amount, "ERC20: transfer amount exceeds balance");
        require(recipient_balance + amount >= recipient_balance, "ERC20: Overflow");
        _balances[sender] -= amount;
        _balances[recipient] += amount;
        emit Transfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");
        uint256 _total = _totalSupply;
        require(_total + amount >= _total, "ERC20: Overflow");
        _totalSupply = _total + amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }

    function _burn(address account, uint256 value) internal {
        require(account != address(0), "ERC20: burn from the zero address");
        uint256 current_balance = _balances[account];
        require(current_balance >= value, "ERC20: burn amount exceeds balance");
        _balances[account] = current_balance - value;
        _totalSupply -= value;
        emit Transfer(account, address(0), value);
    }

    function _approve(
        address owner,
        address spender,
        uint256 value
    ) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        uint256 current_allowance = _allowances[account][msg.sender];
        require(current_allowance >= amount, "ERC20: burn amount exceeds allowance");
        _approve(account, msg.sender, current_allowance - amount);
    }
}

/*
  Copyright 2019-2023 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

/**
  Interface of the ERC20 standard as defined in the EIP. Does not include
  the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function transfer(address recipient, uint256 amount) external returns (bool);

    function allowance(address owner, address spender) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

/*
  Copyright 2019-2023 StarkWare Industries Ltd.

  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  https://www.starkware.co/open-source-license/

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;

import "IERC20.sol";

/**
  Interface for the optional metadata functions from the ERC20 standard.
*/
interface IERC20Metadata is IERC20 {
    /**
      Returns the name of the token.
    */
    function name() external view returns (string memory);

    /**
      Returns the symbol of the token.
    */
    function symbol() external view returns (string memory);

    /**
      Returns the decimals places of the token.
    */
    function decimals() external view returns (uint8);
}

{
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {},
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"fundsOwner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"adminApproval","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"}],"name":"initlialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"registerAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"oldAdmin","type":"address"}],"name":"removeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newMax","type":"uint256"}],"name":"resetMaxMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"selfMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"setBalance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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