Withdraw

Withdraw liquidiy or collateral from the reserve. The SDK handles transaction building, instruction creation, and collateral release calculations.

Withdraw for Lending

Withdraw liquidity from the reserve.

Import Dependencies

Import the required packages for Solana RPC communication, Kamino SDK operations, and Kit transaction building.

import "dotenv/config";
import {
	createSolanaRpc,
	address,
	pipe,
	createTransactionMessage,
	setTransactionMessageFeePayerSigner,
	setTransactionMessageLifetimeUsingBlockhash,
	appendTransactionMessageInstructions,
	signTransactionMessageWithSigners,
	sendTransactionWithoutConfirmingFactory,
	getSignatureFromTransaction,
} from "@solana/kit";
import {
	KaminoMarket,
	KaminoAction,
	VanillaObligation,
	PROGRAM_ID,
} from "@kamino-finance/klend-sdk";
import BN from "bn.js";
import { getKeypair } from "../../utils/keypair";
import { confirmTransactionViaPolling } from "../../utils/tx";

@solana/kit provides modern utilities for RPC, transaction building, and signing. @kamino-finance/klend-sdk contains market operation methods.

Initialize RPC and Load Market

Initialize the RPC connection and load the Kamino market instance.

const signer = await getKeypair();
const rpc = createSolanaRpc("https://api.mainnet-beta.solana.com");
const marketPubkey = address("DxXdAyU3kCjnyggvHmY5nAwg5cRbbmdyX3npfDMjjMek");
const market = await KaminoMarket.load(rpc, marketPubkey, 100);

KaminoMarket.load() fetches the current market state including all reserve data and configuration.

Fetch Obligation and Build Withdraw Instructions

Fetch the existing obligation from the blockchain and build withdraw instructions.

const usdcMint = address("EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v");
const withdrawAmount = new BN(1_000_000); // 1 USDC (6 decimals)

// Fetch the existing obligation from the blockchain
const obligation = await market!.getObligationByWallet(
	address(signer.address),
	new VanillaObligation(PROGRAM_ID)
);

if (!obligation) {
	throw new Error(
		"No obligation found for this wallet. You must deposit first."
	);
}

const action = await KaminoAction.buildWithdrawTxns(
	market!,
	withdrawAmount,
	usdcMint,
	signer,
	obligation,
	true, // useV2Ixs
	undefined // scopeRefreshConfig
);

const instructions = [
	...action.computeBudgetIxs,
	...action.setupIxs,
	...action.lendingIxs,
	...action.cleanupIxs,
];

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

Build and Sign Transaction

Use Kit’s functional pipe pattern to build and sign the transaction.

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
);

Kit’s pipe function enables functional composition of transaction building steps for cleaner, more maintainable code.

Send and Confirm Transaction

Send the transaction and confirm it using HTTP polling.

const signature = getSignatureFromTransaction(signedTransaction);

const sendTransaction = sendTransactionWithoutConfirmingFactory({ rpc });
await sendTransaction(signedTransaction, {
	commitment: "confirmed",
	skipPreflight: true,
});

// Confirm transaction using HTTP polling
await confirmTransactionViaPolling(rpc, signature);

console.log("Withdrawal successful! Signature:", signature);

Show Transaction Confirmation Utility

Transaction Confirmation Utility

The confirmTransactionViaPolling utility polls for transaction confirmation using HTTP requests, avoiding WebSocket dependencies.

async function confirmTransactionViaPolling(
	rpc: any,
	signature: string
): Promise<void> {
	let confirmed = false;

	// Poll for up to 30 seconds
	for (let i = 0; i < 30; i++) {
		const { value: statuses } = await rpc
			.getSignatureStatuses([signature])
			.send();

		if (
			statuses[0]?.confirmationStatus === "confirmed" ||
			statuses[0]?.confirmationStatus === "finalized"
		) {
			confirmed = true;
			break;
		}

		// Wait 1 second before next poll
		await new Promise((resolve) => setTimeout(resolve, 1000));
	}

	if (!confirmed) {
		throw new Error("Transaction confirmation timeout");
	}
}

Withdraw for Borrowing

Withdraw collateral from an obligation.

Import Dependencies

Import the required packages for Solana RPC communication, Kamino SDK operations, and Kit transaction building.

import "dotenv/config";
import {
	createSolanaRpc,
	address,
	pipe,
	createTransactionMessage,
	setTransactionMessageFeePayerSigner,
	setTransactionMessageLifetimeUsingBlockhash,
	appendTransactionMessageInstructions,
	signTransactionMessageWithSigners,
	sendTransactionWithoutConfirmingFactory,
	getSignatureFromTransaction,
} from "@solana/kit";
import {
	KaminoMarket,
	KaminoAction,
	VanillaObligation,
	PROGRAM_ID,
} from "@kamino-finance/klend-sdk";
import BN from "bn.js";
import { getKeypair } from "../../utils/keypair";
import { confirmTransactionViaPolling } from "../../utils/tx";

@solana/kit provides modern utilities for RPC, transaction building, and signing. @kamino-finance/klend-sdk contains market operation methods.

Initialize RPC and Load Market

Initialize the RPC connection and load the Kamino market instance.

const signer = await getKeypair();
const rpc = createSolanaRpc("https://api.mainnet-beta.solana.com");
const marketPubkey = address("DxXdAyU3kCjnyggvHmY5nAwg5cRbbmdyX3npfDMjjMek");
const market = await KaminoMarket.load(rpc, marketPubkey, 100);

KaminoMarket.load() fetches the current market state including all reserve data and configuration.

Fetch Obligation and Build Withdraw Instructions

Fetch the existing obligation from the blockchain and build withdraw instructions.

const usdcMint = address("EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v");
const withdrawAmount = new BN(1_000_000); // 1 USDC (6 decimals)

// Fetch the existing obligation from the blockchain
const obligation = await market!.getObligationByWallet(
	address(signer.address),
	new VanillaObligation(PROGRAM_ID)
);

if (!obligation) {
	throw new Error(
		"No obligation found for this wallet. You must deposit first."
	);
}

const action = await KaminoAction.buildWithdrawTxns(
	market!,
	withdrawAmount,
	usdcMint,
	signer,
	obligation,
	true, // useV2Ixs
	undefined // scopeRefreshConfig
);

const instructions = [
	...action.computeBudgetIxs,
	...action.setupIxs,
	...action.lendingIxs,
	...action.cleanupIxs,
];

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

Build and Sign Transaction

Use Kit’s functional pipe pattern to build and sign the transaction.

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

Send the transaction and confirm it using HTTP polling.

const signature = getSignatureFromTransaction(signedTransaction);

const sendTransaction = sendTransactionWithoutConfirmingFactory({ rpc });
await sendTransaction(signedTransaction, {
	commitment: "confirmed",
	skipPreflight: true,
});

await confirmTransactionViaPolling(rpc, signature);

console.log("Withdrawal successful! Signature:", signature);

What Happens When You Withdraw Collateral?

The collateral amount is removed from your obligation
Your borrowing capacity decreases
Your loan-to-value (LTV) ratio increases

Developers

Earn

Borrow

Miscellaneous

Withdraw for Lending

Import Dependencies

Initialize RPC and Load Market

Fetch Obligation and Build Withdraw Instructions

Build and Sign Transaction

Send and Confirm Transaction

Transaction Confirmation Utility

Withdraw for Borrowing

Import Dependencies

Initialize RPC and Load Market

Fetch Obligation and Build Withdraw Instructions

Build and Sign Transaction

Send and Confirm Transaction

Developers

Earn

Borrow

Miscellaneous

​Withdraw for Lending

​Import Dependencies

​Initialize RPC and Load Market

​Fetch Obligation and Build Withdraw Instructions

​Build and Sign Transaction

​Send and Confirm Transaction

​Transaction Confirmation Utility

​Withdraw for Borrowing

​Import Dependencies

​Initialize RPC and Load Market

​Fetch Obligation and Build Withdraw Instructions

​Build and Sign Transaction

​Send and Confirm Transaction

Withdraw for Lending

Import Dependencies

Initialize RPC and Load Market

Fetch Obligation and Build Withdraw Instructions

Build and Sign Transaction

Send and Confirm Transaction

Transaction Confirmation Utility

Withdraw for Borrowing

Import Dependencies

Initialize RPC and Load Market

Fetch Obligation and Build Withdraw Instructions

Build and Sign Transaction

Send and Confirm Transaction