JustLend Guide: Lending and Borrowing on TRON DeFi
JustLend is TRON's flagship money market protocol — deposit USDT and other assets to earn yield, or borrow against collateral without selling your holdings. Built on compound-style mechanics, JustLend uses algorithmic interest rates that rise as pool utilization increases.
This guide covers supplying, borrowing, health factor, and risks for TronLink users.
How JustLend works
JustLend pools liquidity from suppliers. Borrowers take overcollateralized loans:
- Supply USDT/TRX → receive jTokens (interest-bearing deposit receipt).
- Enable collateral on supplied assets.
- Borrow other assets up to collateral factor limit.
- Repay loan + interest to unlock collateral withdrawal.
Interest paid by borrowers flows to suppliers (minus protocol reserve).
Official app: verify current URL at JustLend documentation — bookmark after confirmation.
Supplying USDT or TRX
- Connect TronLink on official JustLend site.
- Navigate to Supply market for USDT.
- Enter amount → Approve USDT (verify spender contract).
- Confirm Supply transaction.
Your wallet shows reduced USDT; JustLend dashboard shows supplied balance and APY.
APY is variable — spikes when borrowing demand is high.
jTokens explained
When you supply, you receive jTokens (e.g., jUSDT):
- Balance grows via exchange rate (not always visible as token count increase).
- jTokens are redeemable for underlying + accrued interest.
- jTokens can be used in some DeFi integrations — understand implications before transferring.
Borrowing workflow
Only borrow if you understand liquidation:
- Supply collateral (e.g., TRX or USDT).
- Toggle Use as collateral.
- Select borrow asset and amount.
- Confirm borrow transaction.
Health factor must stay above 1. If collateral value drops or debt rises, liquidation bots repay part of your debt and seize collateral with penalty.
| Concept | Meaning |
|---|---|
| Collateral factor | Max borrow power per asset |
| Health factor | Safety margin — liquidate when too low |
| Liquidation penalty | Extra collateral lost to liquidators |
Keep health factor comfortably above minimum — volatile TRX price moves fast.
Interest rates
- Supply APY: Earn from borrower interest.
- Borrow APY: Pay to borrow — rises with utilization.
- Rates update per block based on pool utilization curve.
Check dashboard for real-time numbers — not financial advice.
JST and governance
JustLend ties into JST token governance. See JST token guide.
Safety practices
- Bookmark official URL — phishing clones exist.
- Limit approvals; revoke when done.
- Start with small supply to learn UI.
- Do not borrow maximum LTV — leave buffer.
- Monitor positions during market volatility.
Withdrawing and repaying
Withdraw supply: Ensure no borrow blocking collateral — repay debt first if needed.
Repay borrow: Approve borrowed asset if required → Repay → withdraw collateral.
Monitoring health factor
Borrowers should set price alerts on collateral assets. A sudden TRX or SUN price drop can push your position toward liquidation without warning. Keep collateral ratio above protocol minimums with a buffer. Repay or add collateral proactively rather than during liquidation auctions where you receive poor execution.
Supply-side strategy
Lenders deposit USDT, USDD, or other supported assets to earn variable APY from borrower interest. Rates fluctuate with utilization — high utilization means higher lender yield but higher borrower liquidation risk system-wide. Diversify supply across assets rather than concentrating in a single volatile collateral market.
Related guides
FAQ
What is JustLend?
JustLend is a decentralized lending protocol on TRON where users supply assets to earn interest and borrow against collateral.
Can I lose funds supplying USDT on JustLend?
Smart contract risk, oracle failures, and market events can cause losses. Supplying is not the same as a bank deposit — read DeFi risk disclosures.
Is JustLend the same as JustStable / USDD?
Related ecosystem but different products. JustStable focuses on USDD stablecoin mechanics. See JustStable and USDD.
What happens if I get liquidated?
Liquidators repay some debt and take your collateral plus penalty. You keep remaining collateral/debt per post-liquidation state.
Do I pay TRON fees?
Yes — Energy/TRX for approve, supply, borrow, repay transactions.
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