# Binance Smart Chain **Please refer to the smart contract documentation for Binance Smart Chain for instructions on how to use these API endpoints with their smart contracts.** ## BSC CONTRACT API ### Call API | Method name | Param | Return | Description | Trade related | | ----------------------------------------------- | ------- | ------- | ------------------------------------------------------- | ------------- | | `getPrice()` | - | uint256 | get the curent pool state | Yes | | `getMaxTransaction()` | - | uint256 | get max amount per transaction | Yes | | `getMinTransaction()` | - | uint256 | get min amount per transaction | Yes | | `getEstimatedBuyReceiveAmount(uint256 amount)` | uint256 | uint256 | Returns the amount of trading token to receive | Yes | | `getEstimatedSellReceiveAmount(uint256 amount)` | uint256 | uint256 | Returns the amount of base token to receive | Yes | | `pendingFeeEarn()` | - | uint256 | Return amount of UP token the user can claim | No | | `getMaxRatio()` | - | uint256 | %Max amount per trade | Yes | | `getSTATE()` | - | uint256 | If the pair is open for trading:\[0 - close , 1 - open] | Yes | | `getSeedBuyRate()` | - | uint256 | Rebates %\[Out of 100000] | Yes | | `getFEE()` | - | uint256 | %FEE for the pair\[Out of 100000] | Yes | | `totalSupply()` | - | uint256 | Return Total Supply of liquidity token | No | | `balanceOf(address owner)` | address | uint256 | Return user liquidity balance | No | | `name()` | - | string | Return Liquidity name Symbol | No | | `symbol()` | - | string | Return Liquidity Token Symbol | No | | `decimals()` | - | uint28 | Return Liquidity Token Decimals | No | ### Send API | Method name | Param | Return | Payable | Description | | | ---------------- | ------- | ------- | ------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------- | | `Buy` | address | uint256 | Yes | When a user buys a trading token.Example UP/BNB, a user would like to BUY UP using 1 BNB param would be user account address, call value would be 1 BNB | | | `Sell` | uint256 | uint256 | No | When a user sells a trading token.Example UP/BNB, a user would like to SELL 10 UP.The webapp \*must( send an approval before executing sell function. Param would be 1e19\[Up has 18 decimals we are selling 10 UP] | | | `DepositSupply` | - | uint256 | Yes | For Liquidity Providers to deposit their tokens approval/allowance must be given before trigerring this function | | | `WithdrawSupply` | uint256 | bool | No | False | Liquidity providers to withdraw their liquidity | | `ClaimFee` | - | uint256 | - | No | Liquidity providers to claim the UP fees earn from the smart contract | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.unifiprotocol.com/utrade-v1/untitled.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.