df-elysium-core 0.0.1-beta

// SPDX-License-Identifier: MIT
pragma solidity 0.8.30;

/// A plain ERC-20 for the examples: its whole supply minted to whoever deploys it.
contract TestToken {
    string public constant name = "Elysium Test";
    string public constant symbol = "ETEST";
    uint8 public constant decimals = 6;
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

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

    constructor(uint256 supply) {
        totalSupply = supply;
        balanceOf[msg.sender] = supply;
        emit Transfer(address(0), msg.sender, supply);
    }

    function transfer(address to, uint256 value) external returns (bool) {
        return move(msg.sender, to, value);
    }

    function approve(address spender, uint256 value) external returns (bool) {
        allowance[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) external returns (bool) {
        uint256 allowed = allowance[from][msg.sender];
        require(allowed >= value, "allowance");
        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - value;
        return move(from, to, value);
    }

    function move(address from, address to, uint256 value) private returns (bool) {
        require(balanceOf[from] >= value, "balance");
        balanceOf[from] -= value;
        balanceOf[to] += value;
        emit Transfer(from, to, value);
        return true;
    }
}