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

# Collect Interest

> Low-level instruction to collect accrued SY interest from the orderbook

# createCollectInterestInstruction

Builds a raw instruction to collect accrued SY interest earned by a trader's positions held in the orderbook.

## Usage

```typescript theme={null}
import { createCollectInterestInstruction, amount } from "@exponent-labs/exponent-sdk/client/orderbook";
import { PublicKey } from "@solana/web3.js";

const ix = createCollectInterestInstruction(
  {
    trader: wallet.publicKey,
    orderbook: orderbookAddress,
    vault: vaultAddress,
    tokenEscrowSy: orderbookSyEscrow,
    tokenSyTrader: userSyTokenAccount,
    systemProgram: SYSTEM_PROGRAM_ID,
    tokenProgram: TOKEN_2022_PROGRAM_ID,
    syProgram: syProgramId,
    exponentCore: EXPONENT_CORE_PROGRAM_ID,
    addressLookupTable: vaultLookupTable,
    cpiAccountOrderbook: cpiAccountsOrderbook,
    eventAuthority: eventAuthorityPda,
    program: EXPONENT_ORDERBOOK_PROGRAM_ID,
  },
  {
    syAmountOptional: amount("All"),
  }
);
```

## Accounts

| Name                  | Type        | Signer | Writable | Description                  |
| --------------------- | ----------- | ------ | -------- | ---------------------------- |
| `trader`              | `PublicKey` | Yes    | No       | The user collecting interest |
| `orderbook`           | `PublicKey` | No     | Yes      | Orderbook account            |
| `vault`               | `PublicKey` | No     | No       | Vault account                |
| `tokenEscrowSy`       | `PublicKey` | No     | Yes      | Orderbook SY escrow account  |
| `tokenSyTrader`       | `PublicKey` | No     | Yes      | Trader SY token account      |
| `systemProgram`       | `PublicKey` | No     | No       | System program               |
| `tokenProgram`        | `PublicKey` | No     | No       | SPL Token 2022 program       |
| `syProgram`           | `PublicKey` | No     | No       | SY program                   |
| `exponentCore`        | `PublicKey` | No     | No       | Exponent Core program        |
| `addressLookupTable`  | `PublicKey` | No     | No       | Vault address lookup table   |
| `cpiAccountOrderbook` | `PublicKey` | No     | No       | CPI accounts orderbook       |
| `eventAuthority`      | `PublicKey` | No     | No       | Event authority PDA          |
| `program`             | `PublicKey` | No     | No       | Exponent Orderbook program   |

## Args

| Name               | Type     | Description                                                     |
| ------------------ | -------- | --------------------------------------------------------------- |
| `syAmountOptional` | `Amount` | Amount to collect: `amount("All")` or `amount("Some", [value])` |

### Amount Helper

```typescript theme={null}
import { amount } from "@exponent-labs/exponent-sdk/client/orderbook";

amount("All")                // collect everything available
amount("Some", [500_000n])   // collect a specific amount
```

## Returns

`TransactionInstruction` — a transaction instruction ready to be added to a transaction.