JustLend DAO Contracts

JustLend Protocol is a TRON smart contract protocol for supplying or borrowing assets. Through the jToken contracts, accounts on the TRON blockchain supply capital (TRX or TRC20 tokens) to receive jTokens or borrow assets from the protocol (holding other assets as collateral). The JustLend jToken contracts track these balances and algorithmically set interest rates for borrowers. check more info on Justlend Whitepaper.

Main Contracts

We detail a few of the core contracts in the JustLend protocol.

CToken, CErc20 and CEther

The JustLend jTokens which are self-contained borrowing and lending contracts, are deployed from the code of CToken and CEther contracts. CToken contains the core logic and CTrc20 and CEther add public interfaces for TRC20 tokens and TRX, respectively. Each jToken is assigned an interest rate and risk model (see InterestRateModel and Comptroller parts), and allows accounts to mint (supply capital), redeem (withdraw capital), borrow and repay a borrow . Each jToken is a TRC20 compliant token where balances represent ownership of the market.

Comptroller

The risk model contract validates permissible user actions and disallows actions if they do not fit certain risk parameters. For instance, the Comptroller enforces that each borrowing user must maintain a sufficient collateral balance across all cTokens.

GovernorAlpha

The administrator of the JustLend timelock contract. Holders of JST token may create and vote on proposals that will be queued into the JustLend timelock and then have effects on JustLend jToken and Comptroller contracts. This contract may be replaced in the future with a beta version.

InterestRateModel

Contracts that define interest rate models. These models algorithmically determine interest rates based on the current utilization of a given market (that is, how much of the supplied assets are liquid versus borrowed).

ErrorReporter

Library for tracking error codes and failure conditions.

Exponential

Library for handling fixed-point decimal numbers.

WhitePaperInterestRateModel

Initial interest rate model, as defined in the Whitepaper. This contract accepts a base rate and slope parameter in its constructor.

Careful Math

Library for safe math operations.

SafeToken

Library for safely handling Trc20 interaction.

How to Compile The Contract

You can get the compiler from here‚Äč

And rename the compiler executable file to solc512 , then compile the contracts with these commands.

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/Unitroller.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/Comptroller.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/Governance/WJST.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/Governance/GovernorAlpha.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/Timelock.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/JumpRateModelV2.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/WhitePaperInterestRateModel.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/CEther.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/CErc20Delegate.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/CErc20Delegator.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/PriceOracle/PriceOracle.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/PriceOracleProxy.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/PriceOracle/PriceOracle.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/PriceOracleProxy.sol

./solc512 --allow-paths $YOUR_PATH/justlend-protocol/, --bin --abi --optimize $YOUR_PATH/justlend-protocol/Lens/CompoundLens.sol

Deployed Contract Address

Name Address
Unitroller TGjYzgCyPobsNS9n6WcbdLVR9dH7mWqFx7
Comptroller TB23wYojvAsSx6gR8ebHiBqwSeABiBMPAr
WJST TXk9LnTnLN7oH96H3sKxJayMxLxR9M4ZD6
GovernorBravo TEqiF5JbhDPD77yjEfnEMncGRZNDt2uogD
Timelock TRWNvb15NmfNKNLhQpxefFz7cNjrYjEw7x
jumpRateUSDT JumpRateModelV2 TTetZxp98wcPaciyBMHYvQkS735RZ3tyXY
jumpRateUSDJ JumpRateModelV2 TLScd7kpWnKADtH7ZXKzrJHAxJUnjiiExq
jumpRateSUN JumpRateModelV2 TK7WVRz34wUVRCpsgbW1wUCPmh5bSnCqg1
jumpRateWIN JumpRateModelV2 TBtChPo34CGJkb1QVEwPhxS8HQE2Xp7ir2
jumpRateJST JumpRateModelV2 TMNXjQTa8x4wNHBa3X647KRnkRQpSuXBRT
jumpRateWBTT JumpRateModelV2 TJAfCJdJZa44pG5adQGLMLh27hJqPeLxod
jumpRateNFT JumpRateModelV2 TBE9tkWYdZPEHLNeKC6Xn44YFLpieiM3xq
WhitePaperModelTRX WhitePaperInterestRateModel TF8B4iysAGfrssdQhMJGYsdd9SZoxGsH7M
WhitePaperModelBTC WhitePaperInterestRateModel TYJi9q4qLQWoBiKmMQY3Mn81tmhw7SeCmh
TRX CEther TE2RzoSV3wFK99w6J9UnnZ4vLfXYoxvRwP
USDT CErc20Delegate TLjn59xNM7VEK6VZ3VQ8Y1ipxsdsFka5wZ
USDT CErc20Delegator TXJgMdjVX5dKiQaUi9QobwNxtSQaFqccvd
USDJ CErc20Delegate TYSHTEq9NFSgst94saeRvt6rAYgWkqMFbj
USDJ CErc20Delegator TL5x9MtSnDy537FXKx53yAaHRRNdg9TkkA
SUNOLD CErc20Delegate TSCpzKvJfXHj1HW5jKg9dZA8z9aMxxGLd8
SUNOLD CErc20Delegator TGBr8uh9jBVHJhhkwSJvQN2ZAKzVkxDmno
WIN CErc20Delegate TW3GyD3hYkKwzSGytWwWGXpe2a93zCpRzJ
WIN CErc20Delegator TRg6MnpsFXc82ymUPgf5qbj59ibxiEDWvv
BTC CErc20Delegate TVsKSRgRoMcCp798qqRGesXRfzy2MzRjkR
BTC CErc20Delegator TLeEu311Cbw63BcmMHDgDLu7fnk9fqGcqT
JST CErc20Delegate TQ2sbnmxtR7jrNk4nxz2A8f9sneCqmk6SB
JST CErc20Delegator TWQhCXaWz4eHK4Kd1ErSDHjMFPoPc9czts
WBTT CErc20Delegate TV4WWBqBfn1kd4KmpYeSJpVAfybfrxEN9L
WBTT CErc20Delegator TUY54PVeH6WCcYCd6ZXXoBDsHytN9V5PXt
NFT CErc20Delegate TLkUdtDBLMfJdXni2iTa4u2DKM53XmDJHi
NFT CErc20Delegator TFpPyDCKvNFgos3g3WVsAqMrdqhB81JXHE
SUN CErc20Delegator TPXDpkg9e3eZzxqxAUyke9S4z4pGJBJw9e
SUN CErc20Delegate TM82erAZJSP7NKc17JdTnzVC8WKJHismWB
TUSD CErc20Delegator TSXv71Fy5XdL3Rh2QfBoUu3NAaM4sMif8R
TUSD CErc20Delegate THbrSjDsDA2KJRxx8K73tN7vLgaXSUNQFk
USDC CErc20Delegator TNSBA6KvSvMoTqQcEgpVK7VhHT3z7wifxy
USDC CErc20Delegate THQY8YX19jLFSFg1xhthM5wb7xZvKLCzgq
ETH CErc20Delegator TR7BUFRQeq1w5jAZf1FKx85SHuX6PfMqsV
ETH CErc20Delegate TQBvTVisiceDvsQVbLbcYyWQGWP7wtaQnc
USDD CErc20Delegator TX7kybeP6UwTBRHLNPYmswFESHfyjm9bAS
USDD CErc20Delegate TFdTqrMyb6PMMqTa9vnhmQHDFDU2oUhw9W
Oracle PriceOracle TD8bq1aFY8yc9nsD2rfqqJGDtkh7aPpEpr
Oracle proxy PriceOracleProxy TCKp2AzuhzV4B4Ahx1ej4mvQgHZ1kH7F7k

Discussion

For any concerns with the protocol, open an issue or visit us on Telegram to discuss.

For security concerns, please email support@justlend.org.