Get Exchange Rate - Exponent Docs

The Vault class exposes several getter properties for reading market state after loading. No additional RPC calls are required — these read from the locally loaded vault state.

Usage

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

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

// SY exchange rate
console.log("Exchange rate:", vault.currentSyExchangeRate);

// Maturity info
console.log("Expiration timestamp:", vault.expirationTimestamp);
console.log("Expiration date:", vault.expirationDate);

// Token mints
console.log("PT mint:", vault.mintPt.toBase58());
console.log("YT mint:", vault.mintYt.toBase58());
console.log("SY mint:", vault.mintSy.toBase58());

// SY balance held in the vault
console.log("SY balance:", vault.syBalance);

Available Properties

Property	Type	Description
`currentSyExchangeRate`	`number`	Current SY to underlying exchange rate
`expirationTimestamp`	`number`	UNIX timestamp (seconds) at which the vault expires
`expirationDate`	`Date`	JavaScript `Date` at which the vault expires
`mintPt`	`PublicKey`	PT token mint address
`mintYt`	`PublicKey`	YT token mint address
`mintSy`	`PublicKey`	SY token mint address
`syBalance`	`bigint`	Total SY balance held in the vault’s escrow
`authority`	`PublicKey`	Vault authority PDA
`escrowSy`	`PublicKey`	SY escrow token account
`escrowYt`	`PublicKey`	YT escrow token account
`addressLookupTable`	`PublicKey`	Address lookup table for the vault

Refreshing State

To fetch the latest onchain state, call reload:

await vault.reload(connection);
console.log("Updated rate:", vault.currentSyExchangeRate);