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# StorageLib

## StorageLib

A library for extensions to access proxy pre-assigned storage slots.

### APPLICATIONS\_SLOT

```solidity
bytes32 APPLICATIONS_SLOT
```

persistent storage slots, used to read from proxy storage without having to update implementation

### DELEGATION\_SLOT

```solidity
bytes32 DELEGATION_SLOT
```

### POOL\_INIT\_SLOT

```solidity
bytes32 POOL_INIT_SLOT
```

### POOL\_TOKENS\_SLOT

```solidity
bytes32 POOL_TOKENS_SLOT
```

### TOKEN\_REGISTRY\_SLOT

```solidity
bytes32 TOKEN_REGISTRY_SLOT
```

### UNIV4\_TOKEN\_IDS\_SLOT

```solidity
bytes32 UNIV4_TOKEN_IDS_SLOT
```

### pool

```solidity
function pool() internal pure returns (struct Pool s)
```

### delegation

```solidity
function delegation() internal pure returns (struct DelegationData s)
```

### activeTokensSet

```solidity
function activeTokensSet() internal pure returns (struct AddressSet s)
```

### uniV4TokenIdsSlot

```solidity
function uniV4TokenIdsSlot() internal pure returns (struct TokenIdsSlot s)
```

### activeApplications

```solidity
function activeApplications() internal pure returns (struct ApplicationsSlot s)
```

### isOwnedToken

```solidity
function isOwnedToken(address token) internal view returns (bool)
```

Checks if a token is owned by the pool (base token or active token)

#### Parameters

| Name  | Type    | Description            |
| ----- | ------- | ---------------------- |
| token | address | Token address to check |

#### Return Values

| Name | Type | Description                                         |
| ---- | ---- | --------------------------------------------------- |
| \[0] | bool | True if token is base token or in active tokens set |