# PendingWithdrawal.sol

### Contract Overview

#### Inherits:

* ReentrancyGuard & Ownable from OpenZeppelin
* Also imports `IERC20` interface from OpenZeppelin which is used in the contract

**Author:** OffBlocks Team

**Description:** This contract manages pending withdrawals, allowing a delay period before tokens can be claimed, adding an additional layer of security to the withdrawal process.

### State Variables

* **timestamps** (`mapping(address => uint256)`): Maps token addresses to their withdrawal timestamp. It stores the time when a withdrawal can be claimed for each token.

### Errors

* **ZeroAddress**: Triggered when an operation involves the zero address, which is usually invalid.
* **ZeroTokens**: Occurs when an operation involves zero tokens, indicating either an invalid operation or that there are no tokens to operate with.
* **WithdrawalDelayNotPassed**: Emitted when an attempt to claim a withdrawal is made before the specified delay has passed.
* **CancelTokenWithdrawalFailed**: Indicates a failure in the token withdrawal cancellation process.
* **ClaimTokenWithdrawalFailed**: Indicates a failure in the token withdrawal claiming process.

### Events

* **InitiateWithdrawal**: Emitted when a token withdrawal is initiated.
  * Parameters: `address indexed token`, `uint256 delay`
* **ClaimWithdrawal**: Emitted when a token withdrawal is successfully claimed.
  * Parameters: `address indexed to`, `address indexed token`, `uint256 amount`
* **CancelWithdrawal**: Emitted when a token withdrawal is canceled.
  * Parameters: `address indexed to`, `address indexed token`, `uint256 amount`

### Constructor

```solidity
constructor(address _owner) Ownable(_owner);
```

* **Description**: Initializes the `PendingWithdrawal` contract with the smart wallet owner's address.
* **Inputs**:
  * `_owner`: The address of the contract owner, typically a user's smart wallet.

### Functions

**initiateTokenWithdrawal**

```solidity
function initiateTokenWithdrawal(address _token, uint256 _delay) external nonReentrant onlyOwner;
```

* **Description**: Initiates a withdrawal for a specified token with a delay.
* **Inputs**:
  * `_token`: The address of the token.
  * `_delay`: The delay before the withdrawal can be claimed.
* **Modifiers**: `nonReentrant`, `onlyOwner`

**cancelTokenWithdrawal**

```solidity
function cancelTokenWithdrawal(address _token) external nonReentrant onlyOwner;
```

* **Description**: Cancels a pending withdrawal for a specified token.
* **Inputs**:
  * `_token`: The address of the token.
* **Modifiers**: `nonReentrant`, `onlyOwner`

**claimTokenWithdrawal**

```solidity
function claimTokenWithdrawal(address _token, address _dest) external nonReentrant onlyOwner;
```

* **Description**: Claims a pending withdrawal for a specified token after the delay has passed.
* **Inputs**:
  * `_token`: The address of the token.
  * `_dest`: The destination address for the tokens.
* **Modifiers**: `nonReentrant`, `onlyOwner`