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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.

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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.

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Required Parameters

ParameterTypeDescription
ownerPublicKeyThe owner’s wallet public key
amountBasebigintAmount of base asset to strip

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Optional Parameters

ParameterTypeDescription
baseSrcPublicKeySource base token account. Defaults to owner’s PT mint ATA
sySrcPublicKeyIntermediate SY token account. Defaults to owner’s ATA
ptDstPublicKeyDestination PT token account. Defaults to owner’s ATA
ytDstPublicKeyDestination YT token account. Defaults to owner’s ATA

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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.