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Withdraw assets from Kamino Earn vaults to redeem your shares for underlying tokens. The SDK handles transaction building and vault interaction.

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Complete Flow

Implement the full withdrawal flow either in an off-chain TypeScript client or via on-chain Rust CPI within your Anchor program.
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Import Dependencies

Import the required packages for Solana RPC communication, Kamino SDK operations, and Kit transaction building.
import {
  createSolanaRpc,
  createSolanaRpcSubscriptions,
  address,
  pipe,
  createTransactionMessage,
  setTransactionMessageFeePayerSigner,
  setTransactionMessageLifetimeUsingBlockhash,
  appendTransactionMessageInstructions,
  signTransactionMessageWithSigners,
  sendAndConfirmTransactionFactory,
  getSignatureFromTransaction,
} from '@solana/kit';
import { KaminoVault } from '@kamino-finance/klend-sdk';
import { parseKeypairFile } from '@kamino-finance/klend-sdk/dist/utils/signer.js';
import { Decimal } from 'decimal.js';
@solana/kit provides modern utilities for RPC, transaction building, and signing. @kamino-finance/klend-sdk contains vault operation methods.
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Load Keypair and Initialize Vault

Load the keypair from file, initialize RPC connections, and create the vault instance.
const KEYPAIR_FILE = '/path/to/your/keypair.json';
const signer = await parseKeypairFile(KEYPAIR_FILE);

const rpc = createSolanaRpc('https://api.mainnet-beta.solana.com');
const rpcSubscriptions = createSolanaRpcSubscriptions('wss://api.mainnet-beta.solana.com');

const vault = new KaminoVault(
  rpc,
  address('HDsayqAsDWy3QvANGqh2yNraqcD8Fnjgh73Mhb3WRS5E') // USDC vault
);
parseKeypairFile loads an existing keypair from a JSON file.
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Build Withdraw Instructions

Generate withdraw instructions including optional unstaking instructions.
const withdrawAmount = new Decimal(1.0);
const bundle = await vault.withdrawIxs(signer, withdrawAmount);
const instructions = [...(bundle.unstakeFromFarmIfNeededIxs || []), ...(bundle.withdrawIxs || [])];

if (!instructions.length) {
  throw new Error('No instructions returned by Kamino SDK');
}
The withdrawIxs method returns both unstaking and withdraw instructions. The bundle ensures optimal handling by automatically unstaking deposited assets when needed. The amount represents vault shares to redeem.
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Build and Send Transaction

Fetch the latest blockhash and construct the transaction message.
const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();

const transactionMessage = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(signer, tx),
  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
  (tx) => appendTransactionMessageInstructions(instructions, tx)
);
Kit’s pipe function enables functional composition of transaction building steps for cleaner, more maintainable code.
Sign and send the transaction with built-in confirmation.
const signedTransaction = await signTransactionMessageWithSigners(transactionMessage);

const signature = getSignatureFromTransaction(signedTransaction);

await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(signedTransaction, {
  commitment: 'confirmed',
  skipPreflight: true,
});

console.log('Withdraw successful! Signature:', signature);
The withdrawal is complete. Your vault shares have been redeemed for the underlying assets.

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Full Code Example

import {
  createSolanaRpc,
  createSolanaRpcSubscriptions,
  address,
  pipe,
  createTransactionMessage,
  setTransactionMessageFeePayerSigner,
  setTransactionMessageLifetimeUsingBlockhash,
  appendTransactionMessageInstructions,
  signTransactionMessageWithSigners,
  sendAndConfirmTransactionFactory,
  getSignatureFromTransaction,
} from '@solana/kit';
import { KaminoVault } from '@kamino-finance/klend-sdk';
import { parseKeypairFile } from '@kamino-finance/klend-sdk/dist/utils/signer.js';
import { Decimal } from 'decimal.js';

// Configuration - UPDATE THESE VALUES
const KEYPAIR_FILE = '/path/to/your/keypair.json';

// Load keypair from file
const signer = await parseKeypairFile(KEYPAIR_FILE);

// Initialize RPC and RPC Subscriptions
const rpc = createSolanaRpc('https://api.mainnet-beta.solana.com');
const rpcSubscriptions = createSolanaRpcSubscriptions('wss://api.mainnet-beta.solana.com');
const vault = new KaminoVault(
  rpc,
  address('HDsayqAsDWy3QvANGqh2yNraqcD8Fnjgh73Mhb3WRS5E') // USDC vault
);

// Build withdraw instructions (includes optional unstaking)
const withdrawAmount = new Decimal(1.0);
const bundle = await vault.withdrawIxs(signer, withdrawAmount);
const instructions = [...(bundle.unstakeFromFarmIfNeededIxs || []), ...(bundle.withdrawIxs || [])];

if (!instructions.length) {
  throw new Error('No instructions returned by Kamino SDK');
}

// Build and sign transaction using functional pipe pattern
const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();

const transactionMessage = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(signer, tx),
  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
  (tx) => appendTransactionMessageInstructions(instructions, tx)
);

const signedTransaction = await signTransactionMessageWithSigners(transactionMessage);

// Send and confirm transaction
const signature = getSignatureFromTransaction(signedTransaction);

await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(signedTransaction, {
  commitment: 'confirmed',
  skipPreflight: true,
});

console.log('Withdraw successful! Signature:', signature);