UniPlay

// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.4;

contract UniPlayCoin {
    string public constant name = "UniPlay";
    string public constant symbol = "UNP";
    uint8 public constant decimals = 18;

    event Transfer(address indexed from, address indexed to, uint256 tokens);
    event Approval(
        address indexed tokenOwner,
        address indexed spender,
        uint256 tokens
    );

    uint256 totalSupply_;

    mapping(address => uint256) balances;
    mapping(address => mapping(address => uint256)) allowed;

    constructor() {
        totalSupply_ = 100000000000 * 10**decimals; // decimals
        balances[msg.sender] = totalSupply_;
    }

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

    function balanceOf(address tokenOwner) public view returns (uint256) {
        return balances[tokenOwner];
    }

    function transfer(address receiver, uint256 numTokens)
        public
        returns (bool)
    {
        require(numTokens <= balances[msg.sender]);
        balances[msg.sender] = balances[msg.sender] - numTokens;
        balances[receiver] = balances[receiver] + numTokens;
        emit Transfer(msg.sender, receiver, numTokens);
        return true;
    }

    function approve(address delegate, uint256 numTokens)
        public
        returns (bool)
    {
        allowed[msg.sender][delegate] = numTokens;
        emit Approval(msg.sender, delegate, numTokens);
        return true;
    }

    function allowance(address owner, address delegate)
        public
        view
        returns (uint256)
    {
        return allowed[owner][delegate];
    }

    function transferFrom(
        address owner,
        address buyer,
        uint256 numTokens
    ) public returns (bool) {
        require(numTokens <= balances[owner]);
        require(numTokens <= allowed[owner][msg.sender]);
        balances[owner] = balances[owner] - numTokens;
        allowed[owner][msg.sender] = allowed[owner][msg.sender] - numTokens;
        balances[buyer] = balances[buyer] + numTokens;
        emit Transfer(owner, buyer, numTokens);
        return true;
    }
}

{
  "compilationTarget": {
    "UniPlayCoin.sol": "UniPlayCoin"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}