JustLend AI Glossary¶
Use this compact glossary when answering JustLend questions. For the full glossary, see /resources/glossary.
jToken¶
A TRC20 receipt token received when a user supplies an underlying asset to a JustLend market. jTokens usually use 8 decimals. Their exchange rate to the underlying increases as interest accrues.
Underlying asset¶
The asset supplied to or borrowed from a market, such as TRX, USDT, USDD, BTC, ETH, JST, SUN, or other TRC20 assets.
Exchange rate¶
The conversion ratio between jTokens and the underlying asset. It changes over time as interest accrues.
Collateral factor¶
The percentage of a supplied asset's value that can count toward borrow capacity. A higher collateral factor allows more borrowing but can increase liquidation risk.
Borrow limit¶
The maximum value a user can borrow based on supplied collateral, collateral factors, and oracle prices.
Health factor / risk value¶
A risk indicator for an account. It compares borrowed value against collateralized borrowing capacity. A worse value means higher liquidation risk. Always query live data before action.
Liquidation¶
A permissionless process where an unhealthy borrower's debt is partially repaid by a liquidator, who receives discounted collateral. JustLend follows Compound V2-style liquidation mechanics.
Close factor¶
The maximum portion of a single borrowed asset that a liquidator can repay in one liquidation transaction.
Liquidation incentive¶
The discount or reward received by liquidators when they repay unhealthy debt and seize collateral.
Reserve factor¶
The portion of borrower interest retained by protocol reserves instead of flowing to suppliers.
Utilization¶
Borrowed liquidity divided by supplied liquidity. Higher utilization usually increases borrow APY and can increase supply APY.
APY¶
Annual percentage yield. JustLend APY changes over time with utilization, rewards, staking yield, and governance parameters.
Mantissa¶
A fixed-point scaled integer representation, commonly using 1e18 scale for rates and risk parameters.
Sun¶
The smallest unit of TRX. 1 TRX = 1,000,000 sun.
Active market¶
A market open for current supply/borrow operations, subject to pause flags and liquidity.
Legacy market¶
A market that may remain queryable and allow users to unwind positions but is closed or paused for new supply/borrow activity.
sTRX¶
JustLend's liquid staking token for staked TRX. It is a TRC20 token and uses an exchange rate against TRX.
Energy Rental¶
A JustLend sub-protocol for renting TRON Energy for a period instead of burning or staking TRX directly.
Tool/API mapping examples¶
| Term or user phrase | Use this first | Why |
|---|---|---|
| APY / TVL / utilization | MCP get_market_data or get_all_markets; OpenAPI justlend_apis.yaml |
Values change continuously and must be queried live. |
| Wallet health factor / risk value | MCP get_account_summary; Account Positions |
Requires wallet-specific collateral and borrow data. |
| jToken address / decimals | contracts.json, developers/abis/, or MCP get_supported_markets |
Prevents symbol-only assumptions. |
| Supply / borrow / repay / withdraw | Lending Workflows and MCP supply, borrow, repay, withdraw |
Write tools require pre-flight checks and confirmation. |
| sTRX exchange rate / staking APY | sTRX Staking, MCP get_strx_dashboard |
sTRX is exchange-rate based, not fixed 1:1. |
| Energy rental price | Energy Rental, MCP calculate_energy_rental_price |
Rental price and availability are live values. |
Chinese aliases for retrieval¶
- 抵押率 / collateral factor: how much supplied value counts as borrow capacity.
- 借款额度 / borrow limit: maximum borrowable value from collateral.
- 健康度 / 清算风险 / health factor: account-level risk indicator; query live data.
- 存款凭证 / jToken: receipt token received after supplying an asset.
- 年化 / APY: live annualized yield; do not reuse stale examples.
- 利用率 / utilization: borrowed liquidity divided by supplied liquidity.
- 质押 TRX / sTRX: staking flow covered by sTRX Staking.
- 租能量 / energy rental: energy order flow covered by Energy Rental.
Retrieval rule¶
For definitions, answer briefly from this glossary. For numbers, addresses, wallet state, or transaction actions, route to Source of Truth, MCP Tool Catalog, and MCP Safety Policy before finalizing the response.