Transaction Hash:
Block:
13396086 at Oct-11-2021 07:55:13 AM +UTC
Transaction Fee:
0.00381235134040824 ETH
$12.00
Gas Used:
42,630 Gas / 89.428837448 Gwei
Emitted Events:
301 |
CRFI.Sent( operator=[Sender] 0xba412479abb00023cea89e2995bb57a74e31d785, from=[Sender] 0xba412479abb00023cea89e2995bb57a74e31d785, to=0x000000000000000000000000000000000000dEaD, amount=36053400000000000000000, data=0x, operatorData=0x )
|
302 |
CRFI.Transfer( from=[Sender] 0xba412479abb00023cea89e2995bb57a74e31d785, to=0x000000000000000000000000000000000000dEaD, value=36053400000000000000000 )
|
Account State Difference:
Address | Before | After | State Difference | ||
---|---|---|---|---|---|
0x8848812B...169078C5b | |||||
0x99C85bb6...993Cb89E3
Miner
| (BeePool) | 461.031089195900920853 Eth | 461.031153140900920853 Eth | 0.000063945 | |
0xba412479...74e31D785 |
0.502926814686868709 Eth
Nonce: 150
|
0.499114463346460469 Eth
Nonce: 151
| 0.00381235134040824 |
Execution Trace
CRFI.transfer( recipient=0x000000000000000000000000000000000000dEaD, amount=36053400000000000000000 ) => ( True )
transfer[CRFI (ln:1073)]
_msgSender[CRFI (ln:1081)]
_enableERC777[CRFI (ln:1083)]
_callTokensToSend[CRFI (ln:1086)]
getInterfaceImplementer[CRFI (ln:1397)]
tokensToSend[CRFI (ln:1399)]
_move[CRFI (ln:1089)]
_beforeTokenTransfer[CRFI (ln:1355)]
sub[CRFI (ln:1358)]
add[CRFI (ln:1359)]
Sent[CRFI (ln:1361)]
Transfer[CRFI (ln:1362)]
_callTokensReceived[CRFI (ln:1092)]
getInterfaceImplementer[CRFI (ln:1425)]
tokensReceived[CRFI (ln:1427)]
isContract[CRFI (ln:1429)]
_msgSender[CRFI (ln:1077)]
/** *Submitted for verification at Etherscan.io on 2021-04-10 */ // SPDX-License-Identifier: PRIVATE pragma solidity >=0.6.2 <0.8.0; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC777 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() external view returns (string memory); /** * @dev Returns the smallest part of the token that is not divisible. This * means all token operations (creation, movement and destruction) must have * amounts that are a multiple of this number. * * For most token contracts, this value will equal 1. */ function granularity() external view returns (uint256); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by an account (`owner`). */ function balanceOf(address owner) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * If send or receive hooks are registered for the caller and `recipient`, * the corresponding functions will be called with `data` and empty * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - the caller must have at least `amount` tokens. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function send(address recipient, uint256 amount, bytes calldata data) external; /** * @dev Destroys `amount` tokens from the caller's account, reducing the * total supply. * * If a send hook is registered for the caller, the corresponding function * will be called with `data` and empty `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - the caller must have at least `amount` tokens. */ function burn(uint256 amount, bytes calldata data) external; /** * @dev Returns true if an account is an operator of `tokenHolder`. * Operators can send and burn tokens on behalf of their owners. All * accounts are their own operator. * * See {operatorSend} and {operatorBurn}. */ function isOperatorFor(address operator, address tokenHolder) external view returns (bool); /** * @dev Make an account an operator of the caller. * * See {isOperatorFor}. * * Emits an {AuthorizedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function authorizeOperator(address operator) external; /** * @dev Revoke an account's operator status for the caller. * * See {isOperatorFor} and {defaultOperators}. * * Emits a {RevokedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function revokeOperator(address operator) external; /** * @dev Returns the list of default operators. These accounts are operators * for all token holders, even if {authorizeOperator} was never called on * them. * * This list is immutable, but individual holders may revoke these via * {revokeOperator}, in which case {isOperatorFor} will return false. */ function defaultOperators() external view returns (address[] memory); /** * @dev Moves `amount` tokens from `sender` to `recipient`. The caller must * be an operator of `sender`. * * If send or receive hooks are registered for `sender` and `recipient`, * the corresponding functions will be called with `data` and * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - `sender` cannot be the zero address. * - `sender` must have at least `amount` tokens. * - the caller must be an operator for `sender`. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function operatorSend( address sender, address recipient, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; /** * @dev Destroys `amount` tokens from `account`, reducing the total supply. * The caller must be an operator of `account`. * * If a send hook is registered for `account`, the corresponding function * will be called with `data` and `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. * - the caller must be an operator for `account`. */ function operatorBurn( address account, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; event Sent( address indexed operator, address indexed from, address indexed to, uint256 amount, bytes data, bytes operatorData ); event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData); event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData); event AuthorizedOperator(address indexed operator, address indexed tokenHolder); event RevokedOperator(address indexed operator, address indexed tokenHolder); } interface IERC777Recipient { /** * @dev Called by an {IERC777} token contract whenever tokens are being * moved or created into a registered account (`to`). The type of operation * is conveyed by `from` being the zero address or not. * * This call occurs _after_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the post-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface IERC777Sender { /** * @dev Called by an {IERC777} token contract whenever a registered holder's * (`from`) tokens are about to be moved or destroyed. The type of operation * is conveyed by `to` being the zero address or not. * * This call occurs _before_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the pre-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensToSend( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) 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 `amount` 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 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @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); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) return 0; uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } interface IERC1820Registry { /** * @dev Sets `newManager` as the manager for `account`. A manager of an * account is able to set interface implementers for it. * * By default, each account is its own manager. Passing a value of `0x0` in * `newManager` will reset the manager to this initial state. * * Emits a {ManagerChanged} event. * * Requirements: * * - the caller must be the current manager for `account`. */ function setManager(address account, address newManager) external; /** * @dev Returns the manager for `account`. * * See {setManager}. */ function getManager(address account) external view returns (address); /** * @dev Sets the `implementer` contract as ``account``'s implementer for * `interfaceHash`. * * `account` being the zero address is an alias for the caller's address. * The zero address can also be used in `implementer` to remove an old one. * * See {interfaceHash} to learn how these are created. * * Emits an {InterfaceImplementerSet} event. * * Requirements: * * - the caller must be the current manager for `account`. * - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not * end in 28 zeroes). * - `implementer` must implement {IERC1820Implementer} and return true when * queried for support, unless `implementer` is the caller. See * {IERC1820Implementer-canImplementInterfaceForAddress}. */ function setInterfaceImplementer(address account, bytes32 _interfaceHash, address implementer) external; /** * @dev Returns the implementer of `interfaceHash` for `account`. If no such * implementer is registered, returns the zero address. * * If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28 * zeroes), `account` will be queried for support of it. * * `account` being the zero address is an alias for the caller's address. */ function getInterfaceImplementer(address account, bytes32 _interfaceHash) external view returns (address); /** * @dev Returns the interface hash for an `interfaceName`, as defined in the * corresponding * https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP]. */ function interfaceHash(string calldata interfaceName) external pure returns (bytes32); /** * @notice Updates the cache with whether the contract implements an ERC165 interface or not. * @param account Address of the contract for which to update the cache. * @param interfaceId ERC165 interface for which to update the cache. */ function updateERC165Cache(address account, bytes4 interfaceId) external; /** * @notice Checks whether a contract implements an ERC165 interface or not. * If the result is not cached a direct lookup on the contract address is performed. * If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling * {updateERC165Cache} with the contract address. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool); /** * @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool); event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer); event ManagerChanged(address indexed account, address indexed newManager); } contract CRFI is Context, IERC777, IERC20,IERC777Recipient { //////////////////// using using SafeMath for uint256; using Address for address; //////////////////// const IERC1820Registry constant internal _ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); // We inline the result of the following hashes because Solidity doesn't resolve them at compile time. // See https://github.com/ethereum/solidity/issues/4024. // keccak256("ERC777TokensSender") bytes32 constant private _TOKENS_SENDER_INTERFACE_HASH = 0x29ddb589b1fb5fc7cf394961c1adf5f8c6454761adf795e67fe149f658abe895; // keccak256("ERC777TokensRecipient") bytes32 constant private _TOKENS_RECIPIENT_INTERFACE_HASH = 0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b; //////////////////// for admin address public superAdmin; mapping(address => uint256) public admins; // only effect erc20 interface. // when erc777mode equal 0, the erc777 feature is disabled; // when erc777mode equal 1, the erc777 feature is enabled by whitelist. // when erc777 mode equal 2, the erc777 feature is disabled by blacklist. // when erc777 mode equal 3, the erc777 feature is enabled; // in whitelist or black list mode, whether "from" or "to" address in list, the feature would be effected. enum Erc777ModeType {disabled, whitelist, blacklist, enabled} Erc777ModeType public erc777Mode; mapping(address=>bool) public blacklist; mapping(address=>bool) public whitelist; //////////////////// for coin mapping(address => uint256) private _balances; uint256 private _totalSupply; string private _name; string private _symbol; // ERC20-allowances mapping (address => mapping (address => uint256)) private _allowances; mapping(address=>bool) private _freezeAddress; //////////////////// for operator // This isn't ever read from - it's only used to respond to the defaultOperators query. address[] private _defaultOperatorsArray; // Immutable, but accounts may revoke them (tracked in __revokedDefaultOperators). mapping(address => bool) private _defaultOperators; // For each account, a mapping of its operators and revoked default operators. mapping(address => mapping(address => bool)) private _operators; mapping(address => mapping(address => bool)) private _revokedDefaultOperators; //////////////////// constructor /** * @dev `defaultOperators` may be an empty array. */ constructor(address[] memory defaultOperators_ ) { _name = "Crossfi"; _symbol = "CRFI"; _defaultOperatorsArray = defaultOperators_; for (uint256 i = 0; i < _defaultOperatorsArray.length; i++) { _defaultOperators[_defaultOperatorsArray[i]] = true; } // register interfaces _ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC777Token"), address(this)); _ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC20Token"), address(this)); superAdmin = msg.sender; // init mode ChangeMode(Erc777ModeType.disabled); _ERC1820_REGISTRY.setInterfaceImplementer(address(this), _TOKENS_RECIPIENT_INTERFACE_HASH, address(this)); _mint(msg.sender, 1e26, "", ""); } //////////////////// modifier modifier IsAdmin() { require(msg.sender == superAdmin || admins[msg.sender] == 1, "only admin"); _; } modifier IsSuperAdmin() { require(superAdmin == msg.sender, "only super admin"); _; } modifier CheckFreeze(address addr){ require(_freezeAddress[addr] == false, "account is freeze"); _; } //////////////////// super admin func function AddAdmin(address adminAddr) public IsSuperAdmin(){ require(admins[adminAddr] == 0, "already add this admin"); admins[adminAddr] = 1; } function DelAdmin(address adminAddr) public IsSuperAdmin(){ require(admins[adminAddr] == 1, "this addr is not admin"); admins[adminAddr] = 0; } function ChangeSuperAdmin(address suAdminAddr) public IsSuperAdmin(){ require(suAdminAddr != address(0x0), "empty new super admin"); superAdmin = suAdminAddr; } //////////////////// for admin func function AddBlackList(address[] memory addrs) public IsAdmin(){ for(uint256 i = 0; i < addrs.length; i++){ address addr = addrs[i]; if(blacklist[addr]){ continue; } blacklist[addr] = true; } } function DelBlackList(address[] memory addrs) public IsAdmin(){ for(uint256 i = 0; i < addrs.length; i++){ address addr = addrs[i]; if(!blacklist[addr]){ continue; } blacklist[addr] = false; } } function AddWhiteList(address[] memory addrs) public IsAdmin(){ for(uint256 i = 0; i < addrs.length; i++){ address addr = addrs[i]; if(whitelist[addr]){ continue; } whitelist[addr] = true; } } function DelWhiteList(address[] memory addrs) public IsAdmin(){ for(uint256 i = 0; i < addrs.length; i++){ address addr = addrs[i]; if(!whitelist[addr] ){ continue; } whitelist[addr] = false; } } function ChangeMode(Erc777ModeType mode) public IsAdmin(){ erc777Mode = mode; } function FreezeAddr(address[] memory addrs) public IsAdmin(){ for(uint256 i = 0; i < addrs.length; i++){ address addr = addrs[i]; if(_freezeAddress[addr] == true){ continue; } _freezeAddress[addr] = true; } } function UnfreezeAddr(address[] memory addrs) public IsAdmin(){ for(uint256 i = 0; i < addrs.length; i++){ address addr = addrs[i]; if(_freezeAddress[addr] == false){ continue; } _freezeAddress[addr] = false; } } /** * @dev See {IERC777-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC777-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {ERC20-decimals}. * * Always returns 18, as per the * [ERC777 EIP](https://eips.ethereum.org/EIPS/eip-777#backward-compatibility). */ function decimals() public pure virtual returns (uint8) { return 18; } /** * @dev See {IERC777-granularity}. * * This implementation always returns `1`. */ function granularity() public view virtual override returns (uint256) { return 1; } /** * @dev See {IERC777-totalSupply}. */ function totalSupply() public view virtual override(IERC20, IERC777) returns (uint256) { return _totalSupply; } /** * @dev Returns the amount of tokens owned by an account (`tokenHolder`). */ function balanceOf(address tokenHolder) public view virtual override(IERC20, IERC777) returns (uint256) { return _balances[tokenHolder]; } function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData) public pure override{ revert("can't receive any coin"); } /** * @dev See {IERC777-send}. * * Also emits a {IERC20-Transfer} event for ERC20 compatibility. */ function send(address recipient, uint256 amount, bytes memory data) public virtual override CheckFreeze(_msgSender()){ _send(_msgSender(), recipient, amount, data, "", true); } /** * @dev See {IERC20-transfer}. * * Unlike `send`, `recipient` is _not_ required to implement the {IERC777Recipient} * interface if it is a contract. * * Also emits a {Sent} event. */ function transfer(address recipient, uint256 amount) public virtual override CheckFreeze(_msgSender()) returns (bool) { require(recipient != address(0), "ERC777: transfer to the zero address"); address from = _msgSender(); bool erc777Enable = _enableERC777(from, recipient); if(erc777Enable){ _callTokensToSend(from, from, recipient, amount, "", ""); } _move(from, from, recipient, amount, "", "", erc777Enable); if(erc777Enable){ _callTokensReceived(from, from, recipient, amount, "", "", false); } return true; } /** * @dev See {IERC777-burn}. * * Also emits a {IERC20-Transfer} event for ERC20 compatibility. */ function burn(uint256 amount, bytes memory data) public virtual override CheckFreeze(_msgSender()){ _burn(_msgSender(), amount, data, ""); } /** * @dev See {IERC777-isOperatorFor}. */ function isOperatorFor(address operator, address tokenHolder) public view virtual override returns (bool) { return operator == tokenHolder || (_defaultOperators[operator] && !_revokedDefaultOperators[tokenHolder][operator]) || _operators[tokenHolder][operator]; } /** * @dev See {IERC777-authorizeOperator}. */ function authorizeOperator(address operator) public virtual override { require(_msgSender() != operator, "ERC777: authorizing self as operator"); if (_defaultOperators[operator]) { delete _revokedDefaultOperators[_msgSender()][operator]; } else { _operators[_msgSender()][operator] = true; } emit AuthorizedOperator(operator, _msgSender()); } /** * @dev See {IERC777-revokeOperator}. */ function revokeOperator(address operator) public virtual override { require(operator != _msgSender(), "ERC777: revoking self as operator"); if (_defaultOperators[operator]) { _revokedDefaultOperators[_msgSender()][operator] = true; } else { delete _operators[_msgSender()][operator]; } emit RevokedOperator(operator, _msgSender()); } /** * @dev See {IERC777-defaultOperators}. */ function defaultOperators() public view virtual override returns (address[] memory) { return _defaultOperatorsArray; } /** * @dev See {IERC777-operatorSend}. * * Emits {Sent} and {IERC20-Transfer} events. */ function operatorSend( address sender, address recipient, uint256 amount, bytes memory data, bytes memory operatorData ) public virtual override CheckFreeze(sender) { require(isOperatorFor(_msgSender(), sender), "ERC777: caller is not an operator for holder"); _send(sender, recipient, amount, data, operatorData, true); } /** * @dev See {IERC777-operatorBurn}. * * Emits {Burned} and {IERC20-Transfer} events. */ function operatorBurn(address account, uint256 amount, bytes memory data, bytes memory operatorData) public virtual override CheckFreeze(account){ require(isOperatorFor(_msgSender(), account), "ERC777: caller is not an operator for holder"); _burn(account, amount, data, operatorData); } /** * @dev See {IERC20-allowance}. * * Note that operator and allowance concepts are orthogonal: operators may * not have allowance, and accounts with allowance may not be operators * themselves. */ function allowance(address holder, address spender) public view virtual override returns (uint256) { return _allowances[holder][spender]; } /** * @dev See {IERC20-approve}. * * Note that accounts cannot have allowance issued by their operators. */ function approve(address spender, uint256 value) public virtual override returns (bool) { address holder = _msgSender(); _approve(holder, spender, value); return true; } /** * @dev See {IERC20-transferFrom}. * * Note that operator and allowance concepts are orthogonal: operators cannot * call `transferFrom` (unless they have allowance), and accounts with * allowance cannot call `operatorSend` (unless they are operators). * * Emits {Sent}, {IERC20-Transfer} and {IERC20-Approval} events. */ function transferFrom(address holder, address recipient, uint256 amount) public virtual override CheckFreeze(holder) returns (bool) { require(recipient != address(0), "ERC777: transfer to the zero address"); require(holder != address(0), "ERC777: transfer from the zero address"); address spender = _msgSender(); bool erc777Enable = _enableERC777(holder, recipient); if(erc777Enable){ _callTokensToSend(spender, holder, recipient, amount, "", ""); } _move(spender, holder, recipient, amount, "", "", erc777Enable); _approve(holder, spender, _allowances[holder][spender].sub(amount, "ERC777: transfer amount exceeds allowance")); if(erc777Enable){ _callTokensReceived(spender, holder, recipient, amount, "", "", false); } return true; } /** * @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * If a send hook is registered for `account`, the corresponding function * will be called with `operator`, `data` and `operatorData`. * * See {IERC777Sender} and {IERC777Recipient}. * * Emits {Minted} and {IERC20-Transfer} events. * * Requirements * * - `account` cannot be the zero address. * - if `account` is a contract, it must implement the {IERC777Recipient} * interface. */ function _mint( address account, uint256 amount, bytes memory userData, bytes memory operatorData ) internal virtual { require(account != address(0), "ERC777: mint to the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, address(0), account, amount); // Update state variables _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); _callTokensReceived(operator, address(0), account, amount, userData, operatorData, true); emit Minted(operator, account, amount, userData, operatorData); emit Transfer(address(0), account, amount); } /** * @dev Send tokens * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) * @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient */ function _send( address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool requireReceptionAck ) internal virtual { require(from != address(0), "ERC777: send from the zero address"); require(to != address(0), "ERC777: send to the zero address"); address operator = _msgSender(); _callTokensToSend(operator, from, to, amount, userData, operatorData); _move(operator, from, to, amount, userData, operatorData, true); _callTokensReceived(operator, from, to, amount, userData, operatorData, requireReceptionAck); } /** * @dev Burn tokens * @param from address token holder address * @param amount uint256 amount of tokens to burn * @param data bytes extra information provided by the token holder * @param operatorData bytes extra information provided by the operator (if any) */ function _burn( address from, uint256 amount, bytes memory data, bytes memory operatorData ) internal virtual { require(from != address(0), "ERC777: burn from the zero address"); address operator = _msgSender(); _callTokensToSend(operator, from, address(0), amount, data, operatorData); _beforeTokenTransfer(operator, from, address(0), amount); // Update state variables _balances[from] = _balances[from].sub(amount, "ERC777: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Burned(operator, from, amount, data, operatorData); emit Transfer(from, address(0), amount); } function _move( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool erc777Enable ) private { if(erc777Enable){ _beforeTokenTransfer(operator, from, to, amount); } _balances[from] = _balances[from].sub(amount, "ERC777: transfer amount exceeds balance"); _balances[to] = _balances[to].add(amount); emit Sent(operator, from, to, amount, userData, operatorData); emit Transfer(from, to, amount); } /** * @dev See {ERC20-_approve}. * * Note that accounts cannot have allowance issued by their operators. */ function _approve(address holder, address spender, uint256 value) internal { require(holder != address(0), "ERC777: approve from the zero address"); require(spender != address(0), "ERC777: approve to the zero address"); _allowances[holder][spender] = value; emit Approval(holder, spender, value); } /** * @dev Call from.tokensToSend() if the interface is registered * @param operator address operator requesting the transfer * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) */ function _callTokensToSend( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData ) private { address implementer = _ERC1820_REGISTRY.getInterfaceImplementer(from, _TOKENS_SENDER_INTERFACE_HASH); if (implementer != address(0)) { IERC777Sender(implementer).tokensToSend(operator, from, to, amount, userData, operatorData); } } /** * @dev Call to.tokensReceived() if the interface is registered. Reverts if the recipient is a contract but * tokensReceived() was not registered for the recipient * @param operator address operator requesting the transfer * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) * @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient */ function _callTokensReceived( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool requireReceptionAck ) private { address implementer = _ERC1820_REGISTRY.getInterfaceImplementer(to, _TOKENS_RECIPIENT_INTERFACE_HASH); if (implementer != address(0)) { IERC777Recipient(implementer).tokensReceived(operator, from, to, amount, userData, operatorData); } else if (requireReceptionAck) { require(!to.isContract(), "ERC777: token recipient contract has no implementer for ERC777TokensRecipient"); } } /** * @dev Hook that is called before any token transfer. This includes * calls to {send}, {transfer}, {operatorSend}, minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address operator, address from, address to, uint256 amount) internal virtual { } function _enableERC777(address from, address to) internal view returns(bool){ if(erc777Mode == Erc777ModeType.disabled){ return false; } if(erc777Mode == Erc777ModeType.enabled){ return true; } if(erc777Mode == Erc777ModeType.whitelist){ return whitelist[from] || whitelist[to]; } if(erc777Mode == Erc777ModeType.blacklist){ return (!blacklist[from]) && (!blacklist[to]); } return false; } }