// SPDX-License-Identifier: MIT
pragma solidity 0.8.10;

import "erc20.sol";

/**
 *  Token
 *
 * ERC-20 implementation, with mint & burn
 */
contract Token is IERC20 {
    address internal owner;
    address internal pendingOwner;
    address internal issuer;

    uint8 public decimals;
    uint256 public totalSupply;
    uint256 internal maxSupply;

    mapping (address => uint256) public override balanceOf;
    mapping (address => mapping (address => uint256)) public override allowance;

    string public name;
    string public symbol;

    event NewIssuer(address indexed issuer);
    event TransferOwnership(address indexed owner, bool indexed confirmed);

    modifier only(address role) {
        require(msg.sender == role); // dev: missing role
        _;
    }

    /**
     * Sets the token fields: name, symbol and decimals
     *
     * @param tokenName Name of the token
     * @param tokenSymbol Token Symbol
     * @param tokenDecimals Decimal places
     * @param tokenOwner Token Owner
     * @param tokenIssuer Token Issuer
     * @param tokenMaxSupply Max total supply
     */
    constructor(string memory tokenName, string memory tokenSymbol, uint8 tokenDecimals, address tokenOwner, address tokenIssuer, uint256 tokenMaxSupply) {
        require(tokenOwner != address(0)); // dev: invalid owner
        require(tokenIssuer != address(0)); // dev: invalid issuer
        require(tokenMaxSupply > 0); // dev: invalid max supply

        name = tokenName;
        symbol = tokenSymbol;
        decimals = tokenDecimals;
        owner = tokenOwner;
        issuer = tokenIssuer;
        maxSupply = tokenMaxSupply;
    }

    /**
     * Sets the owner
     *
     * @param newOwner Address of the new owner (must be confirmed by the new owner)
     */
    function transferOwnership(address newOwner)
    external
    only(owner) {
        pendingOwner = newOwner;

        emit TransferOwnership(pendingOwner, false);
    }

    /**
     * Confirms the new owner
     */
    function confirmOwnership()
    external
    only(pendingOwner) {
        owner = pendingOwner;
        pendingOwner = address(0);

        emit TransferOwnership(owner, true);
    }

    /**
     * Sets the issuer
     *
     * @param newIssuer Address of the issuer
     */
    function setIssuer(address newIssuer)
    external
    only(owner) {
        issuer = newIssuer;

        emit NewIssuer(issuer);
    }

    /**
     * Mints {value} tokens to the {to} wallet.
     *
     * @param to The address receiving the newly minted tokens
     * @param value The number of tokens to mint
     */
    function mint(address to, uint256 value)
    external
    only(issuer) {
        require(to != address(0)); // dev: requires non-zero address
        require(totalSupply + value <= maxSupply); // dev: exceeds max supply

        unchecked {
            totalSupply += value;
            balanceOf[to] += value;
        }

        emit Transfer(address(0), to, value);
    }

    /**
     * Approves the {spender} to transfer {value} tokens of the caller.
     *
     * @param spender The address which will spend the funds
     * @param value The value approved to be spent by the spender
     * @return A boolean that indicates if the operation was successful
     */
    function approve(address spender, uint256 value)
    external
    override
    returns(bool) {
        allowance[msg.sender][spender] = value;

        emit Approval(msg.sender, spender, value);

        return true;
    }

    /**
     * Transfers {value} tokens from the caller, to {to}
     *
     * @param to The address to transfer tokens to
     * @param value The number of tokens to be transferred
     * @return A boolean that indicates if the operation was successful
     */
    function transfer(address to, uint256 value)
    external
    override
    returns (bool) {
        updateBalance(msg.sender, to, value);

        return true;
    }

    /**
     * Transfers {value} tokens of {from} to {to}, on behalf of the caller.
     *
     * @param from The address to transfer tokens from
     * @param to The address to transfer tokens to
     * @param value The number of tokens to be transferred
     * @return A boolean that indicates if the operation was successful
     */
    function transferFrom(address from, address to, uint256 value)
    external
    override
    returns (bool) {
        require(allowance[from][msg.sender] >= value); // dev: exceeds allowance
        updateBalance(from, to, value);
        unchecked {
            allowance[from][msg.sender] -= value;
        }

        return true;
    }

    function updateBalance(address from, address to, uint256 value)
    internal {
        require(to != address(0)); // dev: requires non-zero address
        require(balanceOf[from] >= value); // dev: exceeds balance
        unchecked {
            balanceOf[from] -= value;
            balanceOf[to] += value;
        }

        emit Transfer(from, to, value);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.4.0;

interface IERC20 {
    function totalSupply() external view returns (uint);
    function balanceOf(address account) external view returns (uint);
    function transfer(address recipient, uint amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint amount) external returns (bool);
    function approve(address spender, uint amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint);

    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);
}

{
  "evmVersion": "istanbul",
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "libraries": {
    "token.sol": {}
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"string","name":"tokenName","type":"string"},{"internalType":"string","name":"tokenSymbol","type":"string"},{"internalType":"uint8","name":"tokenDecimals","type":"uint8"},{"internalType":"address","name":"tokenOwner","type":"address"},{"internalType":"address","name":"tokenIssuer","type":"address"},{"internalType":"uint256","name":"tokenMaxSupply","type":"uint256"}],"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":"issuer","type":"address"}],"name":"NewIssuer","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"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"bool","name":"confirmed","type":"bool"}],"name":"TransferOwnership","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","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":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"confirmOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newIssuer","type":"address"}],"name":"setIssuer","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":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","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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