> ## 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 interest from a yield position

# createCollectInterestInstruction

Builds a raw instruction to collect accrued interest (paid in SY) from a yield position.

## Usage

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

// Collect all accrued interest
const ix = createCollectInterestInstruction(
  {
    owner: wallet.publicKey,
    yieldPosition: userYieldPositionPda,
    vault: vaultAddress,
    tokenSyDst: userSyTokenAccount,
    escrowSy: vaultEscrowSy,
    authority: vaultAuthority,
    tokenProgram: TOKEN_PROGRAM_ID,
    syProgram: syProgramId,
    treasurySyTokenAccount: treasurySyAccount,
    addressLookupTable: vaultLookupTable,
    eventAuthority: eventAuthorityPda,
    program: EXPONENT_CORE_PROGRAM_ID,
  },
  {
    amount: amount("All"),
  }
);

// Collect a specific amount
const ixPartial = createCollectInterestInstruction(
  { /* ...same accounts... */ },
  {
    amount: amount("Some", [500_000n]),
  }
);
```

## Accounts

| Name                     | Type        | Signer | Writable | Description                      |
| ------------------------ | ----------- | ------ | -------- | -------------------------------- |
| `owner`                  | `PublicKey` | Yes    | Yes      | The yield position owner         |
| `yieldPosition`          | `PublicKey` | No     | Yes      | User's yield position PDA        |
| `vault`                  | `PublicKey` | No     | Yes      | Vault account                    |
| `tokenSyDst`             | `PublicKey` | No     | Yes      | Destination SY token account     |
| `escrowSy`               | `PublicKey` | No     | Yes      | Vault SY escrow account          |
| `authority`              | `PublicKey` | No     | Yes      | Vault authority PDA              |
| `tokenProgram`           | `PublicKey` | No     | No       | SPL Token program                |
| `syProgram`              | `PublicKey` | No     | No       | SY program                       |
| `treasurySyTokenAccount` | `PublicKey` | No     | Yes      | Treasury SY token account (fees) |
| `addressLookupTable`     | `PublicKey` | No     | No       | Vault address lookup table       |
| `eventAuthority`         | `PublicKey` | No     | No       | Event authority PDA              |
| `program`                | `PublicKey` | No     | No       | Exponent Core program            |

## Args

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

### Amount Helper

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

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.