mocks: add ERC777 token interfaces

src/mocks/tokens/interfaces/IERC1820Registry.sol

@@ -0,0 +1,95 @@
+pragma solidity ^0.8.0;
+
+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
+     * [section of the EIP](https://eips.ethereum.org/EIPS/eip-1820#interface-name).
+     */
+    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.address()` 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.address()` 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);
+}

src/mocks/tokens/interfaces/IERC777.sol

@@ -0,0 +1,172 @@
+pragma solidity ^0.8.0;
+
+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 `tokensReceived`
+     * 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 Make an account an operator of 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 `tokensReceived`
+     * interface.
+     */
+    function operatorSend(
+        address sender,
+        address recipient,
+        uint256 amount,
+        bytes calldata data,
+        bytes calldata operatorData
+    ) external;
+
+    /**
+     * @dev Destoys `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);
+}

src/mocks/tokens/interfaces/IERC777Recipient.sol

@@ -0,0 +1,22 @@
+pragma solidity ^0.8.0;
+
+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;
+}

src/mocks/tokens/interfaces/IERC777Sender.sol

@@ -0,0 +1,22 @@
+pragma solidity ^0.8.0;
+
+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;
+}