JUST Foundation
3 min readMay 11, 2023


The JustLend DAO protocol is a TRON-powered money market protocol aimed at establishing fund pools whose interest rates are determined by an algorithm based on the supply and demand of TRON assets. There are two roles within the protocol, namely suppliers and borrowers. Both of them interact directly with the protocol to earn or pay a floating interest rate.

On JustLend DAO, each money market corresponds to a unique TRON asset such as TRX, TRC20 stablecoin (e.g., USDT), or other TRC20-based tokens and entails an open and transparent ledger that records all transactions and historical interest rates.

  1. Supplier

On peer-to-peer platforms where borrowers are matched with lenders, a user’s asset is directly lent to another. By contrast, the JustLend DAO protocol pools all users’ supplies, which drives up liquidity and strikes a better monetary balance. Suppliers can withdraw their assets anytime without having to wait for the loan to expire, allowing JustLend much higher liquidity than their peer-to-peer counterparts.

The asset supplied is denoted as jToken (a TRC-20 token). Token holders can acquire corresponding jTokens on JustLend DAO and follow relevant rules to obtain rewards (interest).

2. Borrowing

If users (borrowers) wish to borrow an asset on the JustLend DAO, they need to first acquire jTokens as collateral with their underlying asset and then borrow any available asset on the platform. Unlike peer-to-peer protocols, the JustLend DAO only asks borrowers to specify the borrowing asset with no other requirements, such as the expiration date. Borrowing is executed in real-time, and its interest rate will be automatically adjusted based on the market’s supply and demand. Here’s an example: the interest rates for borrowing TRX and TRC20-USDT maybe 2% and 5%, respectively. Different assets have varying interest rates, automatically calculated according to the market’s supply and demand.

Core Architecture of JustLend DAO

Core Logic of JustLend DAO

  • Suppliers/borrowers deposit assets to the money markets of JustLend DAO smart contracts, and the assets supplied are the underlying assets.
  • Smart contracts distribute jTokens that correspond to underlying assets to users’ accounts at the exchange rate.
  • Suppliers who supply assets to JustLend DAO money markets can enjoy interest earnings on their loans.
  • Borrowers who over-collateralize an asset can borrow from the corresponding market on JustLend DAO. Unlike P2P lending, borrowers do not have to negotiate with lenders: orders will be automatically matched by JustLend DAO smart contracts as long as the token market has sufficient liquidity.

Borrowing interest rates are determined by JustLend DAO smart contracts in real-time based on market supply and demand. Within a block, borrowers with the same token share the same borrowing interest rate.

  • Borrowing interest on the JustLend DAO accrues based on the number of blocks.
  • Suppliers can redeem the underlying assets they have supplied at any time.
  • Borrowers can repay their loans at any time.
  • If the value of a borrower’s collateralized assets falls below the liquidation threshold, JustLend DAO smart contracts will trigger liquidation automatically.