Contracts Overview

JustLend DAO Protocol contracts are divided in these repositories:

• Supply and Borrow Market: contains core contracts for JustLend DAO, including logic for supply and borrow market (SBM), interest rate model, governance, price oracle and comptroller.

  • SBM: enables supplying of crypto assets as collateral in order to borrow the base asset. Accounts can also earn interest by supplying the base asset to the protocol.

  • Interest Rate Model: users with a positive balance of the base asset earn interest, denominated in the base asset, based on a supply rate model.

  • Price-Oracle: contains the price oracle contracts we support, along with the logic validation for prices returned by these oracles.

  • Governance: contracts used for proposing, voting and executing proposals.

  • Comptroller: the risk management layer of the protocol. It determines how much collateral a user is required to maintain, and whether user can be liquidated.

• Staked TRX: the contracts utilized for staking TRX to earn high rewards.

• Energy Rental: contracts enable users to rent energy anytime with a low price.

Core Contracts

There are 5 categories of core repository contracts:

• JTokens Contract

• Interest Rate Model Contract

• Price Oracle Contract

• Governance Contract

• Comptroller Contract

JTokens Contract

JToken:the contract used to support all assets by JustLend DAO, such as the jTRX, jUSDT, jSUN and jBTC you receive after supplying the corresponding assets.

Interest Rate Model Contract

WhitePaperInterestRateModel: the contract used to set up a straightforward interest rate model, which the borrowing rate is directly proportional to the utilization.

JumpRateModelV2: the Contract used to set up a complex interest rate model, which the interest rate jumps to a higher tier when the utilization rate exceeds uoptimaluoptimal​.

Price Oracle Contract

Price Oracle:the JustLend Protocol use WinkLink's price service to fetch the token price. The PriceOracle contract is responsible for setting and display token prices.

Governance Contract

GovernorBravo:The main JustLend Governance Contract. Users interact with it to:

• Submit new proposal

• Vote on a proposal

• Cancel a proposal

• Queue a proposal for execution with a time lock executor contract

Timelock: the contract used to execute or cancel a queued transaction.

Comptroller Contract

Comptroller: the Comptroller contract is the central contract for each lending pool. It contains functionality central to borrowing activity in the pool like supplying and borrowing assets and liquidations.

Staked TRX Contracts

Staked TRX(sTRX): the contract utilized for staking TRX to earn high rewards.

Energy Rental Contracts

Energy Rental:contracts enable users to rent energy anytime with a low price.