Buy PT - Exponent Docs

The ixWrapperBuyPt method on the MarketThree class converts base assets into PT (Principal Tokens) by wrapping the base into SY and then swapping SY for PT in a single atomic operation.

Usage

import { MarketThree, 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 market = await MarketThree.load(LOCAL_ENV, connection, marketAddress);

const { ixs, setupIxs } = await market.ixWrapperBuyPt({
  owner: wallet.publicKey,
  minPtOut: 1_000_000_000n,
  baseIn: 1_100_000_000n,
});

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

This is an async method because it needs to construct the SY minting accounts from the market’s flavor configuration.

Required Parameters

Parameter	Type	Description
`owner`	`PublicKey`	The owner’s wallet public key
`minPtOut`	`bigint`	Minimum amount of PT tokens to receive
`baseIn`	`bigint`	Amount of base asset to spend

Optional Parameters

Parameter	Type	Description
`tokenSyTrader`	`PublicKey`	Intermediate SY token account. Defaults to owner’s ATA
`tokenPtTrader`	`PublicKey`	Destination PT token account. Defaults to owner’s ATA
`tokenBaseTrader`	`PublicKey`	Source base token account. Defaults to owner’s ATA
`lnImpliedApyLimit`	`number`	Optional APY limit for the swap

Returns

Returns a Promise<PreparedInstruction> with the following structure:

{
  ixs: TransactionInstruction[],      // Main instructions to execute
  setupIxs: TransactionInstruction[]  // Setup instructions for creating ATAs
}

The setupIxs array contains instructions to create the necessary associated token accounts (ATAs) for SY, PT, and base tokens. The ixs array contains the flavor pre-instructions, the buy PT instruction, and the flavor post-instructions.