Borrow & Lend

use klend_interface::helpers;
use klend_interface::ReserveInfo;
use klend_interface::pda;
use klend_interface::KLEND_PROGRAM_ID;
use solana_client::rpc_client::RpcClient;
use solana_pubkey::Pubkey;
use solana_sdk::signer::keypair::read_keypair_file;
use solana_sdk::signer::Signer;
use solana_sdk::transaction::Transaction;
use solana_sdk::message::Message;
use spl_associated_token_account::get_associated_token_address;
use std::str::FromStr;

let rpc_client = RpcClient::new("https://api.mainnet-beta.solana.com");
let signer = read_keypair_file("/path/to/your/keypair.json")
    .expect("Failed to read keypair file");
let owner = signer.pubkey();

// Fetch reserve data from the chain
let reserve_pubkey = Pubkey::from_str("D6q6wuQSrifJKZYpR1M8R4YawnLDtDsMmWM1NbBmgJ59").unwrap();
let reserve_data = rpc_client.get_account(&reserve_pubkey)?;
let reserve = ReserveInfo::from_account_data(reserve_pubkey, &reserve_data.data)?;

// Derive user token accounts
let user_source_liquidity = get_associated_token_address(&owner, &reserve.liquidity_mint);
let (collateral_mint, _) = pda::reserve_collateral_mint(&KLEND_PROGRAM_ID, &reserve_pubkey);
let user_destination_collateral = get_associated_token_address(&owner, &collateral_mint);

// Build deposit instructions (includes refresh_reserve automatically)
let instructions = helpers::deposit::deposit(
    owner,
    &reserve,
    user_source_liquidity,
    user_destination_collateral,
    1_000_000, // 1 USDC (6 decimals)
);

// Build and send
let message = Message::new(&instructions, Some(&owner));
let recent_blockhash = rpc_client.get_latest_blockhash()?;
let tx = Transaction::new(&[&signer], message, recent_blockhash);
let signature = rpc_client.send_and_confirm_transaction(&tx)?;
println!("Deposit successful! Signature: {signature}");

use klend_interface::ObligationContext;
use klend_interface::pda;
use klend_interface::KLEND_PROGRAM_ID;
use solana_client::rpc_client::RpcClient;
use solana_pubkey::Pubkey;
use solana_sdk::signer::keypair::read_keypair_file;
use solana_sdk::signer::Signer;
use solana_sdk::transaction::Transaction;
use solana_sdk::message::Message;
use spl_associated_token_account::get_associated_token_address;
use std::str::FromStr;

let rpc_client = RpcClient::new("https://api.mainnet-beta.solana.com");
let signer = read_keypair_file("/path/to/your/keypair.json")
    .expect("Failed to read keypair file");
let owner = signer.pubkey();

let lending_market = Pubkey::from_str("7u3HeHxYDLhnCoErrtycNokbQYbWGzLs6JSDqGAv5PfF").unwrap();
let reserve_pubkey = Pubkey::from_str("D6q6wuQSrifJKZYpR1M8R4YawnLDtDsMmWM1NbBmgJ59").unwrap();

// Derive and fetch the obligation
let (obligation_pubkey, _) = pda::obligation(
    &KLEND_PROGRAM_ID, 0, 0, &owner, &lending_market,
    &Pubkey::default(), &Pubkey::default(),
);
let obligation_data = rpc_client.get_account(&obligation_pubkey)?;

// Fetch all reserves referenced by the obligation
let reserve_addrs = ObligationContext::reserve_addresses_for_obligation(&obligation_data.data)?;
let reserve_accounts = rpc_client.get_multiple_accounts(&reserve_addrs)?;
let reserves: Vec<(Pubkey, &[u8])> = reserve_addrs.iter()
    .zip(reserve_accounts.iter())
    .filter_map(|(addr, acc)| acc.as_ref().map(|a| (*addr, a.data.as_slice())))
    .collect();
let ctx = ObligationContext::from_account_data(
    obligation_pubkey, &obligation_data.data, &reserves
)?;

// Derive user token account for the withdrawal token (e.g. USDC)
let liquidity_mint = Pubkey::from_str("EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v").unwrap();
let user_dest_liquidity = get_associated_token_address(&owner, &liquidity_mint);

// Build withdraw instructions (includes refresh_reserves + refresh_obligation)
let instructions = ctx.withdraw(
    owner,
    &reserve_pubkey,
    user_dest_liquidity,
    1_000_000, // 1 USDC (6 decimals)
)?;

// Build and send
let message = Message::new(&instructions, Some(&owner));
let recent_blockhash = rpc_client.get_latest_blockhash()?;
let tx = Transaction::new(&[&signer], message, recent_blockhash);
let signature = rpc_client.send_and_confirm_transaction(&tx)?;
println!("Withdrawal successful! Signature: {signature}");