Merge - Exponent Docs

The ixMergeToBase method on the Vault class creates transaction instructions that merge PT and YT back into SY and then unwrap the SY into the base asset in a single atomic operation.

Usage

import { Vault, LOCAL_ENV } from "@exponent-labs/exponent-sdk";
import { Connection, PublicKey, Transaction, sendAndConfirmTransaction } from "@solana/web3.js";

const connection = new Connection("https://api.mainnet-beta.solana.com");
const vault = await Vault.load(LOCAL_ENV, connection, vaultAddress);

const { ixs, setupIxs } = await vault.ixMergeToBase({
  owner: wallet.publicKey,
  amountPy: 1_000_000_000n,
});

const tx = new Transaction().add(...setupIxs, ...ixs);
const signature = await sendAndConfirmTransaction(connection, tx, [wallet]);

This method returns both setupIxs (token account creation) and ixs (the merge + unwrap instructions, including any pre/post instructions from the flavor). Make sure to include both in your transaction.

Required Parameters

Parameter	Type	Description
`owner`	`PublicKey`	The owner’s wallet public key
`amountPy`	`bigint`	Amount of PT and YT to merge

Optional Parameters

Parameter	Type	Description
`ptSrc`	`PublicKey`	Source PT token account. Defaults to owner’s ATA
`ytSrc`	`PublicKey`	Source YT token account. Defaults to owner’s ATA
`syDst`	`PublicKey`	Intermediate SY token account. Defaults to owner’s ATA
`baseDst`	`PublicKey`	Destination base token account

Returns

Returns a Promise<{ ixs: TransactionInstruction[]; setupIxs: TransactionInstruction[] }>:

ixs — The merge and unwrap instructions, including any flavor-specific pre/post instructions
setupIxs — Setup instructions that create associated token accounts for SY, PT, and YT