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Overview

Kamino Lending (KLend) is a Solana-based lending protocol built with Anchor. This guide covers setting up your environment to interact with the protocol.

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Program IDs

The Kamino Lending program is deployed on both mainnet and staging environments: 
// Mainnet Program ID
KLend2g3cP87fffoy8q1mQqGKjrxjC8boSyAYavgmjD

// Staging/Devnet Program ID
SLendK7ySfcEzyaFqy93gDnD3RtrpXJcnRwb6zFHJSh

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Dependencies

1

Install Anchor Framework

Add Anchor dependencies to your Cargo.toml:
Cargo.toml
[dependencies]
anchor-lang = { version = "0.29.0", features = ["event-cpi"] }
anchor-spl = "0.29.0"
solana-program = "1.17"
2

Add Kamino Lending Program

For CPI (Cross-Program Invocation) integration:
Cargo.toml
[dependencies]
kamino-lending = { git = "https://github.com/Kamino-Finance/klend.git", features = ["cpi"] }
3

Install TypeScript SDK (Optional)

For client-side integration:
npm install @kamino-finance/klend-sdk @solana/web3.js @coral-xyz/anchor

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Initialize Connection

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TypeScript/JavaScript

import { Connection, PublicKey, clusterApiUrl } from '@solana/web3.js';
import { Program, AnchorProvider } from '@coral-xyz/anchor';

// Connect to Solana
const connection = new Connection(clusterApiUrl('mainnet-beta'), 'confirmed');

// Kamino Lending Program ID
const KLEND_PROGRAM_ID = new PublicKey('KLend2g3cP87fffoy8q1mQqGKjrxjC8boSyAYavgmjD');

// Initialize provider
const provider = new AnchorProvider(
  connection,
  wallet,
  AnchorProvider.defaultOptions()
);

// Load program
const program = new Program(IDL, KLEND_PROGRAM_ID, provider);

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Rust (On-chain CPI)

use anchor_lang::prelude::*;
use kamino_lending::{
    program::KaminoLending,
    state::{LendingMarket, Reserve, Obligation},
};

declare_id!("YourProgramIdHere");

#[program]
pub mod your_protocol {
    use super::*;

    pub fn integrate_with_klend(ctx: Context<IntegrateKlend>) -> Result<()> {
        // Your integration logic here
        Ok(())
    }
}

#[derive(Accounts)]
pub struct IntegrateKlend<'info> {
    pub klend_program: Program<'info, KaminoLending>,
    pub lending_market: AccountLoader<'info, LendingMarket>,
    pub reserve: AccountLoader<'info, Reserve>,
    // ... other accounts
}

​
Cross-Program Invocation (CPI) Setup

To call Kamino Lending from another Solana program:
1

Import CPI Module

use kamino_lending::{
    cpi::accounts::DepositReserveLiquidity,
    cpi::deposit_reserve_liquidity,
    program::KaminoLending,
};
2

Build CPI Context

pub fn perform_deposit_cpi(
    ctx: Context<YourInstruction>,
    amount: u64,
) -> Result<()> {
    let cpi_accounts = DepositReserveLiquidity {
        owner: ctx.accounts.user.to_account_info(),
        reserve: ctx.accounts.reserve.to_account_info(),
        lending_market: ctx.accounts.lending_market.to_account_info(),
        lending_market_authority: ctx.accounts.lending_market_authority.to_account_info(),
        reserve_liquidity_mint: ctx.accounts.reserve_liquidity_mint.to_account_info(),
        reserve_liquidity_supply: ctx.accounts.reserve_liquidity_supply.to_account_info(),
        reserve_collateral_mint: ctx.accounts.reserve_collateral_mint.to_account_info(),
        user_source_liquidity: ctx.accounts.user_source_liquidity.to_account_info(),
        user_destination_collateral: ctx.accounts.user_destination_collateral.to_account_info(),
        collateral_token_program: ctx.accounts.token_program.to_account_info(),
        liquidity_token_program: ctx.accounts.token_program.to_account_info(),
        instruction_sysvar_account: ctx.accounts.instruction_sysvar.to_account_info(),
    };

    let cpi_ctx = CpiContext::new(
        ctx.accounts.klend_program.to_account_info(),
        cpi_accounts,
    );

    deposit_reserve_liquidity(cpi_ctx, amount)?;
    Ok(())
}
3

Handle Instruction Sysvar

The protocol uses instruction introspection for security checks:
use anchor_lang::solana_program::sysvar::{
    instructions::Instructions as SysInstructions,
    SysvarId,
};

#[derive(Accounts)]
pub struct YourInstruction<'info> {
    // ... other accounts
    
    /// CHECK: Instruction sysvar
    #[account(address = SysInstructions::id())]
    pub instruction_sysvar_account: AccountInfo<'info>,
}

​
Finding Accounts

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Get Lending Market Authority PDA

const [lendingMarketAuthority, bump] = PublicKey.findProgramAddressSync(
  [Buffer.from('lma'), lendingMarket.toBuffer()],
  KLEND_PROGRAM_ID
);

use kamino_lending::utils::seeds;

let (lending_market_authority, bump) = Pubkey::find_program_address(
    &[seeds::LENDING_MARKET_AUTH, lending_market.as_ref()],
    &kamino_lending::ID,
);

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Error Handling

Common errors you should handle: 
use kamino_lending::LendingError;

match result {
    Err(e) if e == LendingError::InvalidObligationOwner.into() => {
        msg!("User is not the obligation owner");
    }
    Err(e) if e == LendingError::ObligationHealthy.into() => {
        msg!("Cannot liquidate a healthy obligation");
    }
    Err(e) if e == LendingError::InsufficientLiquidity.into() => {
        msg!("Not enough liquidity in reserve");
    }
    _ => {}
}

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Next Steps

Deposit & Withdraw

Learn how to deposit liquidity and withdraw collateral

Borrow & Repay

Understand borrowing mechanics and repayment

Liquidations

Implement liquidation bot logic

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