# bToken Introduction ## Introduction Each asset supported by Blueberry Bank is integrated through a bToken contract, which is an EIP-20 compliant representation of balances supplied to the protocol. By minting bTokens, users (1) earn interest through the bToken's exchange rate, which increases in value relative to the underlying asset, and (2) gain the ability to use bTokens as collateral. bTokens are the primary means of interaction with Blueberry Bank; when user mints, redeems, borrows, repays a borrow, liquidates a borrow, or transfers bTokens, they will do so using the bToken Contract. Blueberry Bank GitHHub Organization: All mentions of BErc20 refer to ### Mint The mint function transfers an asset into the protocol, which begins accumulating interest based on the current Supply Rate for the asset. The user receives a quantity of bTokens equal to the underlying tokens supplied, divided by the current Exchange Rate. #### BErc20 ``` // funcation mint(uint mintAmount) returns (uint) ``` --- # 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://v1.docs.blueberry.garden/lending-protocol/btoken-introduction.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.