// File: CartelFinance.sol



//SPDX-License-Identifier: MIT
pragma solidity ^0.6.9;

import "./EIP20Interface.sol";

//Based on https://github.com/ConsenSys/Tokens. 
contract CartelFinance is EIP20Interface {
    mapping (address => uint256) public balances;
    mapping (address => mapping (address => uint256)) public allowed;

    string public name = "cartel.finance";
    uint8 public decimals = 4;
    string public symbol = "CFI";
    uint256 constant private MAX_UINT256 = 2**256 - 1;

    constructor() public {
        balances[tx.origin] = 500000000; 
        totalSupply = 500000000;
    }

    //Simple transfer
    function transfer(address _to, uint256 _value) override public  returns (bool success) {
        require(balances[msg.sender] >= _value);
        balances[msg.sender] -= _value;
        balances[_to] += _value;
        emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars
        return true;
    }

    //Get balance of address
    function balanceOf(address _owner) override public view returns (uint256 balance) {
        return balances[_owner];
    }
    
    function approve(address _spender, uint256 _value) override public returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars
        return true;
    }
 
    function allowance(address _owner, address _spender) override public view returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }

    function transferFrom(address _from, address _to, uint256 _value) override public returns (bool success) {
        uint256 tokenAllowance = allowed[_from][msg.sender];
        require(balances[_from] >= _value && tokenAllowance >= _value);
        balances[_to] += _value;
        balances[_from] -= _value;
        if (tokenAllowance < MAX_UINT256) {
            allowed[_from][msg.sender] -= _value;
        }
        emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars
        return true;
    }
}

// File: EIP20Interface.sol



//SPDX-License-Identifier: MIT
pragma solidity ^0.6.9;
 
// Abstract contract for the full ERC 20 Token standard
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
abstract contract EIP20Interface  {
    /* This is a slight change to the ERC20 base standard.
    function totalSupply() constant returns (uint256 supply);
    is replaced with:
    uint256 public totalSupply;
    This automatically creates a getter function for the totalSupply.
    This is moved to the base contract since public getter functions are not
    currently recognised as an implementation of the matching abstract
    function by the compiler.
    */
    /// total amount of tokens
    uint256 public totalSupply;

    /// @param _owner The address from which the balance will be retrieved
    /// @return balance The balance
    function balanceOf(address _owner) virtual public view returns (uint256 balance);

    /// @notice send `_value` token to `_to` from `msg.sender`
    /// @param _to The address of the recipient
    /// @param _value The amount of token to be transferred
    /// @return success Whether the transfer was successful or not
    function transfer(address _to, uint256 _value) virtual public returns (bool success);

    /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
    /// @param _from The address of the sender
    /// @param _to The address of the recipient
    /// @param _value The amount of token to be transferred
    /// @return success Whether the transfer was successful or not
    function transferFrom(address _from, address _to, uint256 _value) virtual public returns (bool success);

    /// @notice `msg.sender` approves `_spender` to spend `_value` tokens
    /// @param _spender The address of the account able to transfer the tokens
    /// @param _value The amount of tokens to be approved for transfer
    /// @return success Whether the approval was successful or not
    function approve(address _spender, uint256 _value) virtual public returns (bool success);

    /// @param _owner The address of the account owning tokens
    /// @param _spender The address of the account able to transfer the tokens
    /// @return remaining Amount of remaining tokens allowed to spent
    function allowance(address _owner, address _spender) virtual public view returns (uint256 remaining);

    // solhint-disable-next-line no-simple-event-func-name
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
// File: Migrations.sol



//SPDX-License-Identifier: MIT
pragma solidity ^0.6.9;

contract Migrations {
  address public owner;
  uint public last_completed_migration;

  modifier restricted() {
    if (msg.sender == owner) _;
  }

  constructor() public {
    owner = msg.sender;
  }

  function setCompleted(uint completed) public restricted {
    last_completed_migration = completed;
  }

  function upgrade(address new_address) public restricted {
    Migrations upgraded = Migrations(new_address);
    upgraded.setCompleted(last_completed_migration);
  }
}