> For the complete documentation index, see [llms.txt](https://bitfi-2.gitbook.io/bitfi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bitfi-2.gitbook.io/bitfi/developer/bfusd-overview/contract-abi.md).

# Contract ABI

The bfUSD suite exposes several ABI surfaces:

* **BitFiStablecoin (bfUSD):** ERC-20 with mint and burn access control plus Chainlink Oracle.
* **BitFiStablecoinMinter (USDT / USDC):** Handles deposits of the two underlying stablecoins, enforcing min/max deposits and interacting with the price oracle.
* **StakedBitFiStablecoin (hbfUSD / pbfUSD):** ERC-4626 vaults that expose `deposit`, `mint`, `withdraw`, `redeem`, LayerZero helpers (`send`, `quoteSend`), and detailed view functions such as `currentRatio`, `epochRatios`, and withdrawal bookkeeping.
* **BitFiStablecoinZap:** Bundles minting and staking into a single call for user convenience.
* **Instant & Standard Redeemers:** Accept bfUSD and immediately release USDT/USDC (Instant) or queue a standard redemption (Standard).

All bfUSD-related contracts are verified on Etherscan, so developers can review the implementation and fetch ABIs directly from on-chain sources.