SiskoCoin

{{
  "language": "Solidity",
  "sources": {
    "contracts/MyToken.sol": {
      "content": "// SPDX-License-Identifier: MIT

/*
???? WELCOME TO THE SISKO COIN ????

Sisko Token ($SISKO) – where the brave burn brighter.

*/

pragma solidity ^0.8.28;

import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@openzeppelin/contracts/utils/Context.sol";

contract SiskoCoin is Context, IERC20, IERC20Metadata {

    mapping(address => uint256) private _emberBalance;
    mapping(address => mapping(address => uint256)) private _flameAllowance;

    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    uint8 private immutable _decimals;

    error BurnDenied();
    error UnauthorizedFirestarter();
    error InsufficientFlame();
    error TryAgainAshling();

    event Ignition(address indexed from, address indexed to, uint256 amount);

    constructor() {
        _name = "SISKOCOIN";
        _symbol = "$SISKO";
        _decimals = 18;
        _ignite(msg.sender, 200_000_000_000 * 10**18); // 200B tokens
    }

    function whyDoWeBurn() external pure returns (string memory) {
        return "To rise from ashes, again and again.";
    }

    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() external view override returns (uint256) {
        return _totalSupply;
    }

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

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

    function transfer(address to, uint256 amount) external override returns (bool) {
        address owner = _msgSender();
        _blaze(owner, to, amount);
        return true;
    }

    function approve(address spender, uint256 amount) external override returns (bool) {
        address owner = _msgSender();
        _authorizeFlame(owner, spender, amount);
        return true;
    }

    function transferFrom(address from, address to, uint256 amount) external override returns (bool) {
        address spender = _msgSender();
        _spendFlame(from, spender, amount);
        _blaze(from, to, amount);
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {
        address owner = _msgSender();
        _authorizeFlame(owner, spender, _flameAllowance[owner][spender] + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = _flameAllowance[owner][spender];
        if (currentAllowance < subtractedValue) revert BurnDenied();
        unchecked {
            _authorizeFlame(owner, spender, currentAllowance - subtractedValue);
        }
        return true;
    }

    function _blaze(address from, address to, uint256 amount) internal {
        if (from == address(0)) revert UnauthorizedFirestarter();
        if (to == address(0)) revert UnauthorizedFirestarter();

        uint256 fromBalance = _emberBalance[from];
        if (fromBalance < amount) revert InsufficientFlame();

        unchecked {
            _emberBalance[from] = fromBalance - amount;
            _emberBalance[to] += amount;
        }

        emit Transfer(from, to, amount);
        emit Ignition(from, to, amount);
    }

    function _ignite(address account, uint256 amount) internal {
        if (account == address(0)) revert UnauthorizedFirestarter();

        _totalSupply += amount;
        unchecked {
            _emberBalance[account] += amount;
        }

        emit Transfer(address(0), account, amount);
    }

    function _authorizeFlame(address owner, address spender, uint256 amount) internal {
        if (owner == address(0)) revert UnauthorizedFirestarter();
        if (spender == address(0)) revert UnauthorizedFirestarter();

        _flameAllowance[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _spendFlame(address owner, address spender, uint256 amount) internal {
        uint256 currentAllowance = _flameAllowance[owner][spender];
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < amount) revert TryAgainAshling();
            unchecked {
                _authorizeFlame(owner, spender, currentAllowance - amount);
            }
        }
    }
}"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
"
    },
    "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity >=0.6.2;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "abi"
        ]
      }
    },
    "remappings": [],
    "evmVersion": "paris"
  }
}}