> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hadron.fi/llms.txt
> Use this file to discover all available pages before exploring further.

# Pool Admin Controls

## **setPoolState**

<Tip>
  Pools are initialised by default as Reject Swaps. This is done to deposit funds to prevent indexing from aggregators
</Tip>

```typescript theme={null}
pool.setPoolState(authority, { newState: PoolState.Paused });

//// Send the instructions
```

| **Param**            | **Description**                                                |
| :------------------- | :------------------------------------------------------------- |
| `params.Initialized` | Pool is live and will be indexed by aggregators                |
| `params.Paused`      | All operations are paused in the pool                          |
| `params.RejectSwaps` | Swaps are rejected, but the user can perform all other actions |

## **nominateAuthority / acceptAuthority**

Hadron pools have multiple authorities that can each be delegated to different wallets to split the surface area of control.

```typescript theme={null}
pool.nominateAuthority(authority, { 
newAuthority: newPk, 
expirySlot: 300_000_000n }); 

// Expiry - optional parameter for the number of slots 
// newAuthority signs: pool.acceptAuthority(newPk);
```

The pool has three states that can be rotated as follows by various authorities:

| From → To                   | Pool Authority | Quoting Authority | Pauser Authority |
| :-------------------------- | :------------- | :---------------- | :--------------- |
| `Initialized → Paused`      | ✅              | ❌                 | ✅                |
| `Initialized → RejectSwaps` | ✅              | ✅                 | ❌                |
| `Paused → Initialized`      | ✅              | ❌                 | ❌                |
| `Paused → RejectSwaps`      | ✅              | ❌                 | ❌                |
| `RejectSwaps → Initialized` | ✅              | ❌                 | ❌                |
| `RejectSwaps → Paused`      | ✅              | ❌                 | ✅                |

What each state blocks:

| State         | Swaps | Deposits | Withdrawals |
| :------------ | :---- | :------- | :---------- |
| `Initialized` | ✅     | ✅        | ✅           |
| `RejectSwaps` | ❌     | ✅        | ✅           |
| `Paused`      | ❌     | ❌        | ❌           |

## **closePool**

Closes the pool and reclaims rent. Requires authority and all vaults to be empty.

```typescript theme={null}
pool.closePool(authority);
```

## **Properties**

These are available on any`Hadron`instance after creation:

| **Property**       | **Type**                | **Description**                         |
| :----------------- | :---------------------- | :-------------------------------------- |
| `pool.poolAddress` | `PublicKey`             | The pool’s on-chain address             |
| `pool.programId`   | `PublicKey`             | Program ID                              |
| `pool.addresses`   | `PoolAddresses`         | All derived PDA addresses for this pool |
| `pool.config`      | `DecodedConfig`         | Decoded config account data             |
| `pool.oracle`      | `DecodedMidpriceOracle` | Decoded oracle data                     |
| `pool.curveMeta`   | `DecodedCurveMeta`      | Decoded curve metadata                  |