Installation

npm install git+ssh://git@github.com:Blade-Labs-Corp/solend-sdk.git

Solend Typescript SDK

This is the Solend Typescript to interact with http://solend.fi. Improved by allowing the use of custom lending pools!

Basic usage

Reading data

// There are three levels of data you can request (and cache) about the lending market.
// 1. Initalize market with parameters and metadata
const market = await SolendMarket.initialize(
  connection,
  'production', // optional environment argument, you can use the generateConfig function if you're using a custom pool
  new PublicKey('7RCz8wb6WXxUhAigok9ttgrVgDFFFbibcirECzWSBauM'), // optional market address (TURBO SOL). Defaults to 'Main' market
);
console.log(market.reserves.map(reserve => reserve.config.loanToValueRatio));

// 2. Read on-chain accounts for reserve data and cache
await market.loadReserves();

const usdcReserve = market.reserves.find(res => res.config.symbol === 'USDC');
console.log(usdcReserve.stats.totalDepositsWads.toString());

// Read Solend liquidity mining stats
await market.loadRewards()
console.log(reserve.stats.totalSupplyAPY().rewards); // {apy: 0.07, rewardMint: "SLND...

// Refresh all cached data
market.refreshAll()

const obligation = market.fetchObligationByWallet('[WALLET_ID]');
console.log(obligation.stats.borrowLimit)

Perform lending action

// Create one or more (may contain setup accuont creation txns) to perform a Solend action.
const solendAction = await SolendAction.buildDepositTxns(
  connection,
  amountBase,
  symbol,
  publicKey,
  "production",
  new PublicKey('7RCz8wb6WXxUhAigok9ttgrVgDFFFbibcirECzWSBauM'), // optional market address (TURBO SOL). Defaults to 'Main' market
);

await solendAction.sendTransactions(sendTransaction); // sendTransaction from wallet adapter or custom

Upcoming

• Better support for obligation based actions (Fully repay borrow, max borrow up to borrow limit, etc.)
• Showing and claiming past reward lots
• Better caching of data
• React hook API

FAQ

Interest rates do not match what's show on solend.fi

The Solend SDK pulls certain price data from cached sources from our backend api that's different from solend.fi's sources. Divergences should be very small and these price sources will soon be consolidated.

Multiple transactions being created for a lending action

Due to transaction size limits of Solana, a user with a high amount of positions might need their lending action to be broken into multiple transactions. Usually this involves creating or closing associated token accounts for up to 3 transactions.

Values are weird on devnet

Partner rewards and liquidity mining are not present on devnet.