The ixStripFromBase method on the Vault class creates a transaction instruction that wraps a base asset into SY, strips it into PT and YT, and deposits the YT into the user’s yield position — all in a single atomic operation.
A YieldTokenPosition must be initialized via ixInitializeYieldPosition before calling this method. The instruction auto-deposits YT into the yield position, so the account must already exist onchain. 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 ix = await vault.ixStripFromBase({
owner: wallet.publicKey,
amountBase: 1_000_000_000n,
});
const tx = new Transaction().add(ix);
const signature = await sendAndConfirmTransaction(connection, tx, [wallet]);
This is an async method because it needs to construct the SY minting accounts from the vault’s flavor configuration.
Required Parameters
| Parameter | Type | Description |
|---|
owner | PublicKey | The owner’s wallet public key |
amountBase | bigint | Amount of base asset to strip |
Optional Parameters
| Parameter | Type | Description |
|---|
baseSrc | PublicKey | Source base token account. Defaults to owner’s PT mint ATA |
sySrc | PublicKey | Intermediate SY token account. Defaults to owner’s ATA |
ptDst | PublicKey | Destination PT token account. Defaults to owner’s ATA |
ytDst | PublicKey | Destination YT token account. Defaults to owner’s ATA |
Returns
Returns a Promise<TransactionInstruction> that wraps the base asset into SY, strips it into PT and YT, and deposits the YT into the user’s yield position. 
