> ## 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.

# Wrapper Merge

> Low-level instruction to merge PT + YT and unwrap to base asset atomically

# createWrapperMergeInstruction

Builds a raw instruction that merges PT + YT back into SY and unwraps to the base asset in a single atomic operation. This combines the merging and SY redemption steps.

## Usage

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

const ix = createWrapperMergeInstruction(
  {
    merger: wallet.publicKey,
    tokenSyMerger: userSyTokenAccount,
    vault: vaultAddress,
    escrowSy: vaultEscrowSy,
    tokenYtMerger: userYtTokenAccount,
    tokenPtMerger: userPtTokenAccount,
    mintYt: ytMint,
    mintPt: ptMint,
    authority: vaultAuthority,
    vaultAddressLookupTable: vaultLookupTable,
    tokenProgram: TOKEN_PROGRAM_ID,
    vaultRobotYieldPosition: vaultYieldPosition,
    syProgram: syProgramId,
    systemProgram: SystemProgram.programId,
    eventAuthority: eventAuthorityPda,
    program: EXPONENT_CORE_PROGRAM_ID,
  },
  {
    amountPy: BigInt(1_000_000),
    redeemSyAccountsUntil: 0,
  }
);
```

## Accounts

| Name                      | Type        | Signer | Writable | Description                            |
| ------------------------- | ----------- | ------ | -------- | -------------------------------------- |
| `merger`                  | `PublicKey` | Yes    | Yes      | The user performing the merge          |
| `tokenSyMerger`           | `PublicKey` | No     | Yes      | User's SY token account (intermediate) |
| `vault`                   | `PublicKey` | No     | Yes      | Vault account                          |
| `escrowSy`                | `PublicKey` | No     | Yes      | Vault SY escrow account                |
| `tokenYtMerger`           | `PublicKey` | No     | Yes      | User's source YT token account         |
| `tokenPtMerger`           | `PublicKey` | No     | Yes      | User's source PT token account         |
| `mintYt`                  | `PublicKey` | No     | Yes      | YT mint address                        |
| `mintPt`                  | `PublicKey` | No     | Yes      | PT mint address                        |
| `authority`               | `PublicKey` | No     | Yes      | Vault authority PDA                    |
| `vaultAddressLookupTable` | `PublicKey` | No     | No       | Vault address lookup table             |
| `tokenProgram`            | `PublicKey` | No     | No       | SPL Token program                      |
| `vaultRobotYieldPosition` | `PublicKey` | No     | Yes      | Vault robot yield position             |
| `syProgram`               | `PublicKey` | No     | No       | SY program                             |
| `systemProgram`           | `PublicKey` | No     | No       | System program                         |
| `eventAuthority`          | `PublicKey` | No     | No       | Event authority PDA                    |
| `program`                 | `PublicKey` | No     | No       | Exponent Core program                  |

## Args

| Name                    | Type     | Description                                                  |
| ----------------------- | -------- | ------------------------------------------------------------ |
| `amountPy`              | `bigint` | Amount of PT + YT to merge (in base units)                   |
| `redeemSyAccountsUntil` | `number` | Index into remaining accounts for SY redemption CPI accounts |

## Returns

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