Contract 0xcCcCcCcCdbEC186DC426F8B5628AF94737dF0E60 2

Txn Hash Method
Block
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To
Value [Txn Fee]
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0xcc037d46bc30540e5b584bf7aca9a48ff4d5d843cc01e67951876526236cda51Transfer136359612024-04-24 21:57:111 min ago0x5f41d9408c7a9f63f1131c8250fda4da79b796d1 IN  crow with knife: CAW Token0 CRO0.1778435095 5,048.5
0x0fa792418f63bf6102cbccc443baebdea0688de2dc969e1b6ac77ea16866d1d4Transfer136359612024-04-24 21:57:111 min agoCronos ID Name pigeonwithipod.cro IN  crow with knife: CAW Token0 CRO0.5050
0xebf14bcf25a87339ad5b8cbdcbc08e16e77c314abfba647a88129f006919e8c6Transfer136359492024-04-24 21:56:022 mins ago0x9a29f58ac3c6d04e82de1309b1c33ee0aac44ad7 IN  crow with knife: CAW Token0 CRO0.5050
0x1b1a44b92913302473c512db1a980391fbcd3ac65527f3c9c47de5a6ee74ef39Transfer136359482024-04-24 21:55:572 mins ago0x4dfa27336132277f0d7a169e2cfe2a9faa53b50b IN  crow with knife: CAW Token0 CRO0.19016336625 5,403.75
0xc18d56f006278fe949eeb84680459561309227dc603dc137a0bdaf174e8e4d65Transfer136359032024-04-24 21:51:426 mins agoCronos ID Name 271prophecy.cro IN  crow with knife: CAW Token0 CRO0.17771455 5,050
0x004e228e3c362eef2d74aeffda0fcca55dad4b50461b80e0b880a243a87648b1Transfer136359022024-04-24 21:51:366 mins ago0xdc81ad4b28e2ff2a6dc4beadc8e35b98b7b879bd IN  crow with knife: CAW Token0 CRO0.5050
0x310cc6eafec0fddaee6e62fd661684a092090ac27d814623b002e5b12dbf1e7cTransfer136358602024-04-24 21:47:3710 mins ago0x9e3a3e5c943929c373ac0d65a98e283ee85fefc8 IN  crow with knife: CAW Token0 CRO0.5050
0x71eb39f9f2defab2900757a66d18867f1b2e1af045e6ecaf2340d129c30ca48bTransfer136358342024-04-24 21:45:1013 mins ago0xc86b483121006b0ef3383125bf581f0cd832ab15 IN  crow with knife: CAW Token0 CRO0.5050
0x24117994b64a54a823d7233990652d3f2a373e4e410b53ac06e92a53e3d3f4f5Transfer136358182024-04-24 21:43:3914 mins agoCronos ID Name zillarelli.cro IN  crow with knife: CAW Token0 CRO0.18318040
0x285dd1dcd7e181b19c9817f800b3fdb9b205e6334b667b6a6b51e5f41493bff1Transfer136358042024-04-24 21:42:2016 mins ago0xc3eae3fcc07cd082d2a09b83239ff62d9f39bf60 IN  crow with knife: CAW Token0 CRO0.5050
0x7a6ec39f6b1f6f47d3a97fd4524f5170388dbe2bbb31adba86216033fe460671Transfer136357742024-04-24 21:39:2919 mins ago0x731246ec9ed51a9b5069b662c471a011e34fe267 IN  crow with knife: CAW Token0 CRO0.1776617635 5,048.5
0xfa33e3d3cb6ada2675dd59646638258af8c30d10b709b219bd489b57592fd320Transfer136357712024-04-24 21:39:1219 mins ago0x705dab1b465156a9a95056f45b08ea9c51e3c82d IN  crow with knife: CAW Token0 CRO0.5050
0x9223dd72423d7bd7a03ba9a57c40fae7454e21e9a933c3c858f1454805788f90Transfer136357582024-04-24 21:37:5820 mins ago0x3191110d98f9229a0f443999be3d8a9db9c88982 IN  crow with knife: CAW Token0 CRO0.1776617635 5,048.5
0x88e4d1eccd7c908d6dcf8fe390682addd0c127e0330b75734242e88a92151c9fTransfer136357522024-04-24 21:37:2421 mins ago0x830329e7d3cb8e6080de47f9d23e6152661bbc55 IN  crow with knife: CAW Token0 CRO0.17789635 5,050
0x24bebb0b595c025d4ab487793104edd8b72e30a44441150bb17d8f5594246281Transfer136357192024-04-24 21:34:1624 mins ago0x79819272f179f119db67c5e737f78d985f8a35a5 IN  crow with knife: CAW Token0 CRO0.1776617635 5,048.5
0xb5e1cebb35d8b88718cd2061f7be2d18aa60b95b41702fc5a949dfb9db8f1b4fTransfer136357082024-04-24 21:33:1325 mins ago0x6dcae03d8f7f11f14f3b4997a2c4bae1df47d92d IN  crow with knife: CAW Token0 CRO0.5050
0x6d4a9e3001fc84eb3f6cc94f27dc54905b29100e438b35f6c4bfe584b1c6c62cTransfer136356972024-04-24 21:32:1126 mins ago0x96a16ad106eadeb8d9dc270cfb65c9a4978edcad IN  crow with knife: CAW Token0 CRO0.5050
0xfcf5eb6aa65242b6b539fe22b5cf0826572e31bd088fe77cf5cc25e1cf8e8bacTransfer136356862024-04-24 21:31:0927 mins ago0xcd6961587f2983f31a045ca0189d8ceaf44ea1ce IN  crow with knife: CAW Token0 CRO0.1777223455 5,048.5
0x8690334437779db315a9afa90fc5c8d309a27646867202b328596800d22ab0f3Transfer136356812024-04-24 21:30:4027 mins ago0x3696d288e12da5dd1f6f364599fe345ae7f64c1d IN  crow with knife: CAW Token0 CRO0.5050
0x20388d42c92abb91d5dbf610584e4aeec0f1d70b130aba8eb5085a5b3a6e175fApprove136356772024-04-24 21:30:1828 mins ago0xc3d671197fbb13d769435cb3b08c52f870c6c368 IN  crow with knife: CAW Token0 CRO0.25085597250
0x76ce9b4ae53e8d21dbc876105e6f92f7dbbae13009402a6c67bd2398fda4eb32Transfer136356712024-04-24 21:29:4428 mins ago0xcd6961587f2983f31a045ca0189d8ceaf44ea1ce IN  crow with knife: CAW Token0 CRO0.1776617635 5,048.5
0x9b0c0b5a7ae33ac1f51bf21e248ff12ba433d306853f756c9eb500d2eec81738Transfer136356572024-04-24 21:28:2430 mins ago0x71f36a95cece8a5884d4bf56672e5ecf56c11a08 IN  crow with knife: CAW Token0 CRO0.5050
0x205fb5b874c05286bdb220b9d0b71c02797de7e8d3a786512afb198b12c280cdTransfer136356252024-04-24 21:25:2233 mins ago0x84f92de6557b4811aee3fc8c110d60d43a37a166 IN  crow with knife: CAW Token0 CRO0.5050
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OVERVIEW

literally just a crow with a knife.

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0xf4c94e5a1afbd8f10eb3ba8ec1f78b5e1b374daee91e2f345f42893bbf3819ef129483062024-03-10 23:20:3944 days 22 hrs ago crow with knife: CAW Token0x521d98df2b757f15b0a903ebcd83b53791f8977f216,342.99 CRO
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Contract Source Code Verified (Exact Match)

Contract Name:
CawCaw

Compiler Version
v0.8.20+commit.a1b79de6

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
File 1 of 7 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 2 of 7 : draft-IERC6093.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}

File 3 of 7 : ERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 */
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;

    mapping(address account => mapping(address spender => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `value`.
     */
    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `value`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `value`.
     */
    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     * ```
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

File 4 of 7 : IERC20Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Interface for the optional metadata functions from the ERC20 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);
}

File 5 of 7 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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);
}

File 6 of 7 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (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;
    }
}

File 7 of 7 : CawCaw.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


// ░█████╗░░█████╗░░██╗░░░░░░░██╗░█████╗░░█████╗░░██╗░░░░░░░██╗
// ██╔══██╗██╔══██╗░██║░░██╗░░██║██╔══██╗██╔══██╗░██║░░██╗░░██║
// ██║░░╚═╝███████║░╚██╗████╗██╔╝██║░░╚═╝███████║░╚██╗████╗██╔╝
// ██║░░██╗██╔══██║░░████╔═████║░██║░░██╗██╔══██║░░████╔═████║░
// ╚█████╔╝██║░░██║░░╚██╔╝░╚██╔╝░╚█████╔╝██║░░██║░░╚██╔╝░╚██╔╝░
// ░╚════╝░╚═╝░░╚═╝░░░╚═╝░░░╚═╝░░░╚════╝░╚═╝░░╚═╝░░░╚═╝░░░╚═╝░░

contract CawCaw is ERC20, Ownable {
    uint256 public constant TOTAL_SUPPLY = 777777777777777 * (10 ** 18);
    uint256 public constant SALE_SUPPLY = TOTAL_SUPPLY / 2; 
    uint256 public totalCROContributed = 0;
    mapping(address => uint256) public croContributions;

    uint256 public saleStartTimestamp;
    uint256 public saleEndTimestamp;
    uint256 public claimStartTimestamp;

    string public earlycrow = "greetings from block 946";

    error SaleNotStarted();
    error SaleAlreadyEnded();
    error ClaimNotStarted();
    error NoContribution();
    error InvalidTimestamps();
    error RecipientsAmountsMismatch();

    event ContributionUpdated(address indexed contributor, uint256 amountContributed, uint256 newTotalCROContributed);

    constructor() ERC20("crow with knife", "CAW") Ownable(msg.sender) {
        _mint(address(this), TOTAL_SUPPLY);
    }

    function setSalePeriod(uint256 _saleStartTimestamp, uint256 _saleEndTimestamp) public onlyOwner {
        if (_saleStartTimestamp >= _saleEndTimestamp) revert InvalidTimestamps();
        saleStartTimestamp = _saleStartTimestamp;
        saleEndTimestamp = _saleEndTimestamp;
    }

    function setClaimStartTimestamp(uint256 _claimStartTimestamp) public onlyOwner {
        if (_claimStartTimestamp <= saleEndTimestamp) revert InvalidTimestamps();
        claimStartTimestamp = _claimStartTimestamp;
    }

    function caw() public payable {
        if (block.timestamp < saleStartTimestamp || block.timestamp > saleEndTimestamp) revert SaleNotStarted();
        croContributions[msg.sender] += msg.value;
        totalCROContributed += msg.value;

        emit ContributionUpdated(msg.sender, msg.value, totalCROContributed);
    }

    function claim() public {
        if (block.timestamp < claimStartTimestamp) revert ClaimNotStarted();
        uint256 contribution = croContributions[msg.sender];
        if (contribution == 0) revert NoContribution();

        uint256 claimableAmount = (contribution * SALE_SUPPLY) / totalCROContributed;
        croContributions[msg.sender] = 0; 
        _transfer(address(this), msg.sender, claimableAmount);
    }

    function withdrawCro(uint256 amount, address receiver) public onlyOwner {
        (bool ok, ) = payable(receiver).call{value: amount}("");
        if (!ok) revert NoContribution();
    }

    function cawcaw(address[] memory recipients, uint256[] memory amounts) public onlyOwner {
        if (recipients.length != amounts.length) revert RecipientsAmountsMismatch();

        for (uint256 i = 0; i < recipients.length; i++) {
            _transfer(address(this), recipients[i], amounts[i]);
        }
    }
}

Settings
{
  "evmVersion": "paris",
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

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","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"saleEndTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"saleStartTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_claimStartTimestamp","type":"uint256"}],"name":"setClaimStartTimestamp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_saleStartTimestamp","type":"uint256"},{"internalType":"uint256","name":"_saleEndTimestamp","type":"uint256"}],"name":"setSalePeriod","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalCROContributed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"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"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"}],"name":"withdrawCro","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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