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// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

import {Constants} from "../libraries/Constants.sol";
import {InstructionLib} from "../libraries/Instruction.sol";

import {IGateway} from "./interfaces/IGateway.sol";
import {IOtimDelegate} from "../IOtimDelegate.sol";

/// @title Gateway
/// @author Otim Labs, Inc.
/// @notice a helper contract that protects the Otim Executor from delegation front-running attacks
contract Gateway is IGateway {
    /// @notice hash of the "delegation designator" i.e. keccak256(0xef0100 || delegate_address)
    bytes32 public immutable designatorHash;

    constructor() {
        designatorHash = keccak256(abi.encodePacked(Constants.EIP7702_PREFIX, msg.sender));
    }

    /// @inheritdoc IGateway
    function isDelegated(address target) external view override returns (bool) {
        return target.codehash == designatorHash;
    }

    /// @inheritdoc IGateway
    function safeExecuteInstruction(
        address target,
        InstructionLib.Instruction calldata instruction,
        InstructionLib.Signature calldata signature
    ) external {
        // revert if the target is not delegated to OtimDelegate at runtime
        if (target.codehash != designatorHash) {
            revert TargetNotDelegated();
        }

        // execute the Instruction on the target account
        IOtimDelegate(target).executeInstruction(instruction, signature);
    }

    /// @inheritdoc IGateway
    function safeExecuteInstruction(address target, InstructionLib.Instruction calldata instruction) external {
        // revert if the target is not delegated to OtimDelegate at runtime
        if (target.codehash != designatorHash) {
            revert TargetNotDelegated();
        }

        // execute the Instruction on the target account with no signature
        IOtimDelegate(target).executeInstruction(instruction, InstructionLib.Signature(0, 0, 0));
    }

    /// @inheritdoc IGateway
    function safeDeactivateInstruction(
        address target,
        InstructionLib.InstructionDeactivation calldata deactivation,
        InstructionLib.Signature calldata signature
    ) external {
        // revert if the target is not delegated to OtimDelegate at runtime
        if (target.codehash != designatorHash) {
            revert TargetNotDelegated();
        }

        // execute the Instruction on the target account
        IOtimDelegate(target).deactivateInstruction(deactivation, signature);
    }
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

/// @title Constants
/// @author Otim Labs, Inc.
/// @notice a library defining constants used throughout the protocol
library Constants {
    /// @notice the EIP-712 signature prefix
    bytes2 public constant EIP712_PREFIX = 0x1901;

    /// @notice the EIP-7702 delegation designator prefix
    bytes3 public constant EIP7702_PREFIX = 0xef0100;
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

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

/// @title InstructionLib
/// @author Otim Labs, Inc.
/// @notice a library defining the Instruction datatype and util functions
library InstructionLib {
    /// @notice defines a signature
    struct Signature {
        uint8 v;
        bytes32 r;
        bytes32 s;
    }

    /// @notice defines the ExecutionState datatype
    /// @param deactivated - whether the Instruction has been deactivated
    /// @param executionCount - the number of times the Instruction has been executed
    /// @param lastExecuted - the unix timestamp of the last time the Instruction was executed
    struct ExecutionState {
        bool deactivated;
        uint120 executionCount;
        uint120 lastExecuted;
    }

    /// @notice defines the Instruction datatype
    /// @param salt - a number to ensure the uniqueness of the Instruction
    /// @param maxExecutions - the maximum number of times the Instruction can be executed
    /// @param action - the address of the Action contract to be executed
    /// @param arguments - the arguments to be passed to the Action contract
    struct Instruction {
        uint256 salt;
        uint256 maxExecutions;
        address action;
        bytes arguments;
    }

    /// @notice abi.encodes and hashes an Instruction struct to create a unique Instruction identifier
    /// @param instruction - an Instruction struct to hash
    /// @return instructionId - unique identifier for the Instruction
    function id(Instruction calldata instruction) internal pure returns (bytes32) {
        return keccak256(abi.encode(instruction));
    }

    /// @notice calculates the EIP-712 hash for activating an Instruction
    /// @param instruction - an Instruction struct to hash
    /// @param domainSeparator - the EIP-712 domain separator for the verifying contract
    /// @return hash - EIP-712 hash for activating `instruction`
    function signingHash(
        Instruction calldata instruction,
        bytes32 domainSeparator,
        bytes32 instructionTypeHash,
        bytes32 argumentsHash
    ) internal pure returns (bytes32) {
        return keccak256(
            abi.encodePacked(
                Constants.EIP712_PREFIX,
                domainSeparator,
                keccak256(
                    abi.encode(
                        instructionTypeHash,
                        instruction.salt,
                        instruction.maxExecutions,
                        instruction.action,
                        argumentsHash
                    )
                )
            )
        );
    }

    /// @notice defines a deactivation instruction
    /// @param instructionId - the unique identifier of the Instruction to deactivate
    struct InstructionDeactivation {
        bytes32 instructionId;
    }

    /// @notice the EIP-712 type-hash for an InstructionDeactivation
    bytes32 public constant DEACTIVATION_TYPEHASH = keccak256("InstructionDeactivation(bytes32 instructionId)");

    /// @notice calculates the EIP-712 hash for a InstructionDeactivation
    /// @param deactivation - an InstructionDeactivation struct to hash
    /// @param domainSeparator - the EIP-712 domain separator for the verifying contract
    /// @return hash - EIP-712 hash for the `deactivation`
    function signingHash(InstructionDeactivation calldata deactivation, bytes32 domainSeparator)
        internal
        pure
        returns (bytes32)
    {
        return keccak256(
            abi.encodePacked(
                Constants.EIP712_PREFIX,
                domainSeparator,
                keccak256(abi.encode(DEACTIVATION_TYPEHASH, deactivation.instructionId))
            )
        );
    }
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

import {InstructionLib} from "../../libraries/Instruction.sol";

/// @title IGateway
/// @author Otim Labs, Inc.
/// @notice interface for the Gateway contract
interface IGateway {
    error TargetNotDelegated();

    /// @notice checks if the target address is delegated to OtimDelegate
    /// @param target - the target address to check
    /// @return delegated - if the target address is delegated to OtimDelegate
    function isDelegated(address target) external view returns (bool);

    /// @notice executes an Instruction on the target address if it is delegated to OtimDelegate
    /// @param target - the target account to execute the Instruction on
    /// @param instruction - the Instruction to execute
    /// @param signature - the Signature over the Instruction signing hash
    function safeExecuteInstruction(
        address target,
        InstructionLib.Instruction calldata instruction,
        InstructionLib.Signature calldata signature
    ) external;

    /// @notice executes an Instruction on the target address if it is delegated to OtimDelegate
    /// @dev After the first execution of an Instruction, the Signature is no longer checked, so we can omit the Signature in this case
    /// @param target - the target account to execute the Instruction on
    /// @param instruction - the Instruction to execute
    function safeExecuteInstruction(address target, InstructionLib.Instruction calldata instruction) external;

    /// @notice deactivates an Instruction on the target address if it is delegated to OtimDelegate
    /// @param target - the target account to deactivate the Instruction on
    /// @param deactivation - the InstructionDeactivation
    /// @param signature - the Signature over the InstructionDeactivation signing hash
    function safeDeactivateInstruction(
        address target,
        InstructionLib.InstructionDeactivation calldata deactivation,
        InstructionLib.Signature calldata signature
    ) external;
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

import {IERC165} from "@openzeppelin-contracts/utils/introspection/IERC165.sol";
import {IERC721Receiver} from "@openzeppelin-contracts/token/ERC721/IERC721Receiver.sol";
import {IERC1155Receiver} from "@openzeppelin-contracts/token/ERC1155/IERC1155Receiver.sol";
import {IERC1271} from "@openzeppelin-contracts/interfaces/IERC1271.sol";

import {IGateway} from "./core/interfaces/IGateway.sol";
import {IInstructionStorage} from "./core/interfaces/IInstructionStorage.sol";
import {IActionManager} from "./core/interfaces/IActionManager.sol";

import {InstructionLib} from "./libraries/Instruction.sol";

/// @title IOtimDelegate
/// @author Otim Labs, Inc.
/// @notice interface for OtimDelegate contract
interface IOtimDelegate is IERC165, IERC721Receiver, IERC1155Receiver, IERC1271 {
    /// @notice emitted when an Instruction is executed on behalf of a user
    event InstructionExecuted(bytes32 indexed instructionId, uint256 executionCount);
    /// @notice emitted when an Instruction is deactivated by the user before its natural completion
    event InstructionDeactivated(bytes32 indexed instructionId);

    error InvalidSignature(bytes32 instructionId);
    error ActionNotExecutable(bytes32 instructionId);
    error ActionExecutionFailed(bytes32 instructionId, bytes result);
    error ExecutionSameBlock(bytes32 instructionId);
    error InstructionAlreadyDeactivated(bytes32 instructionId);

    function gateway() external view returns (IGateway);
    function instructionStorage() external view returns (IInstructionStorage);
    function actionManager() external view returns (IActionManager);

    /// @notice execute an Instruction
    /// @dev the first execution "activates" the Instruction, subsequent calls ignore signature
    /// @param instruction - a conditional or scheduled recurring task to be carried out on behalf of the user
    /// @param signature - user signature over the Instruction activation hash
    function executeInstruction(
        InstructionLib.Instruction calldata instruction,
        InstructionLib.Signature calldata signature
    ) external;

    /// @notice deactivate an Instruction
    /// @param deactivation - a InstructionDeactivation struct
    /// @param signature - user signature over the Instruction deactivation hash
    function deactivateInstruction(
        InstructionLib.InstructionDeactivation calldata deactivation,
        InstructionLib.Signature calldata signature
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity >=0.5.0;

/**
 * @title ERC-721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC-721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be
     * reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity >=0.6.2;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Interface that must be implemented by smart contracts in order to receive
 * ERC-1155 token transfers.
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC-1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC-1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1271.sol)

pragma solidity >=0.5.0;

/**
 * @dev Interface of the ERC-1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with `hash`
     */
    function isValidSignature(bytes32 hash, bytes calldata signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

import {InstructionLib} from "../../libraries/Instruction.sol";

/// @title IInstructionStorage
/// @author Otim Labs, Inc.
/// @notice interface for InstructionStorage contract
interface IInstructionStorage {
    error DataCorruptionAttempted();

    /// @notice increments the execution counter for an Instruction and sets `lastExecuted` to current block.timestamp
    /// @param instructionId - unique identifier for an Instruction
    function incrementExecutionCounter(bytes32 instructionId) external;

    /// @notice increments the execution counter for an Instruction, sets `lastExecuted` to current block.timestamp, and deactivates
    /// @param instructionId - unique identifier for an Instruction
    function incrementAndDeactivate(bytes32 instructionId) external;

    /// @notice deactivates an Instruction's execution state in storage
    /// @param instructionId - unique identifier for an Instruction
    function deactivateStorage(bytes32 instructionId) external;

    /// @notice returns the execution state of an Instruction for a particular user
    /// @param user - the user the Instruction pertains to
    /// @param instructionId - unique identifier for an Instruction
    /// @return executionState - the current execution state of the Instruction
    function getExecutionState(address user, bytes32 instructionId)
        external
        view
        returns (InstructionLib.ExecutionState memory);

    /// @notice returns the execution state of an Instruction for msg.sender
    /// @param instructionId - unique identifier for an Instruction
    /// @return executionState - the current execution state of the Instruction
    function getExecutionState(bytes32 instructionId) external view returns (InstructionLib.ExecutionState memory);

    /// @notice checks if an Instruction is deactivated for msg.sender
    /// @param instructionId - unique identifier for an Instruction
    /// @return deactivated - true if the Instruction is deactivated
    function isDeactivated(bytes32 instructionId) external view returns (bool);
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.26;

/// @title IActionManager
/// @author Otim Labs, Inc.
/// @notice interface for ActionManager contract
interface IActionManager {
    /// @notice emitted when an Action is added
    event ActionAdded(address indexed action);
    /// @notice emitted when an Action is removed
    event ActionRemoved(address indexed action);
    /// @notice emitted when all Actions are globally locked
    event ActionsGloballyLocked();
    /// @notice emitted when all Actions are globally unlocked
    event ActionsGloballyUnlocked();

    error AlreadyAdded();
    error AlreadyRemoved();
    error AlreadyLocked();
    error AlreadyUnlocked();

    /// @notice returns Action metadata
    /// @param action - the address of the Action
    /// @return executable - true if the Action exists and is not locked
    function isExecutable(address action) external view returns (bool);
}

{
  "remappings": [
    "@chainlink-contracts/=dependencies/smartcontractkit-chainlink-2.25.0/contracts/",
    "@openzeppelin-contracts/=dependencies/@openzeppelin-contracts-5.4.0/",
    "@openzeppelin/contracts/=dependencies/@openzeppelin-contracts-5.4.0/",
    "@uniswap-universal-router/=dependencies/@uniswap-universal-router-2.0.0/",
    "@uniswap-v3-core/=dependencies/@uniswap-v3-core-1.0.2-solc-0.8-simulate/",
    "@uniswap-v3-periphery/=dependencies/@uniswap-v3-periphery-1.4.4/",
    "forge-std/=dependencies/forge-std-1.10.0/",
    "@openzeppelin-contracts-5.4.0/=dependencies/@openzeppelin-contracts-5.4.0/",
    "@uniswap-universal-router-2.0.0/=dependencies/@uniswap-universal-router-2.0.0/",
    "@uniswap-v3-core-1.0.2-solc-0.8-simulate/=dependencies/@uniswap-v3-core-1.0.2-solc-0.8-simulate/contracts/",
    "@uniswap-v3-periphery-1.4.4/=dependencies/@uniswap-v3-periphery-1.4.4/contracts/",
    "@uniswap/=dependencies/@uniswap-v3-periphery-1.4.4/node_modules/@uniswap/",
    "ds-test/=dependencies/@uniswap-universal-router-2.0.0/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=dependencies/@uniswap-universal-router-2.0.0/lib/v4-periphery/lib/v4-core/lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-gas-snapshot/=dependencies/@uniswap-universal-router-2.0.0/lib/permit2/lib/forge-gas-snapshot/src/",
    "forge-std-1.10.0/=dependencies/forge-std-1.10.0/src/",
    "openzeppelin-contracts/=dependencies/@uniswap-universal-router-2.0.0/lib/permit2/lib/openzeppelin-contracts/",
    "permit2/=dependencies/@uniswap-universal-router-2.0.0/lib/permit2/",
    "smartcontractkit-chainlink-2.25.0/=dependencies/smartcontractkit-chainlink-2.25.0/",
    "solmate/=dependencies/@uniswap-universal-router-2.0.0/lib/solmate/src/",
    "v3-periphery/=dependencies/@uniswap-universal-router-2.0.0/lib/v3-periphery/contracts/",
    "v4-core/=dependencies/@uniswap-universal-router-2.0.0/lib/v4-periphery/lib/v4-core/src/",
    "v4-periphery/=dependencies/@uniswap-universal-router-2.0.0/lib/v4-periphery/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": false
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false
}

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