Deposit Liquidity - Exponent Docs

The ixsDepositLiquidity method builds transaction instructions that deposit tokens into the vault and mint LP tokens to the depositor.

Usage

import { ExponentVault } 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 ExponentVault.load({ connection, address: vaultAddress });

const ixs = await vault.ixsDepositLiquidity({
  depositor: wallet.publicKey,
  mint: new PublicKey("EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"), // USDC
  tokenAmountIn: 100_000_000n,
  minLpOut: 0n,
});

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

Required Parameters

Parameter	Type	Description
`depositor`	`PublicKey`	The depositor’s wallet public key
`mint`	`PublicKey`	The token mint to deposit. Must match a vault token entry
`tokenAmountIn`	`bigint \| number`	Amount of tokens to deposit in native units
`minLpOut`	`bigint \| number`	Minimum LP tokens to receive. Set to `0` to accept any amount

Optional Parameters

Parameter	Type	Description
`tokenSrc`	`PublicKey`	Source token account. Defaults to the depositor’s ATA for `mint`
`entryTokenVault`	`PublicKey`	Vault token escrow. Defaults to the Squads-controlled account defined in the token entry
`tokenLpDst`	`PublicKey`	LP token destination. Defaults to the depositor’s ATA for the LP mint
`tokenProgram`	`PublicKey`	Token program. Defaults to `TOKEN_PROGRAM_ID`
`extraRemainingAccounts`	`AccountMeta[]`	Additional accounts (e.g., Kamino obligation accounts)

Returns

Returns a Promise<TransactionInstruction[]> — an array of instructions that deposit tokens into the vault and mint LP tokens.

LP Token Calculation

The amount of LP tokens minted is proportional to the deposit relative to total vault AUM:

LP out = (token_amount_in_base × total_lp_supply) / total_aum_in_base

The minLpOut parameter protects against price movements between transaction construction and execution.

To estimate the exchange rate before depositing, read vault.state.financials for AUM and call vault.fetchLpTokenSupply() for the current LP supply.