> For the complete documentation index, see [llms.txt](https://brownfi.gitbook.io/brownfi-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://brownfi.gitbook.io/brownfi-docs/brownfi-v3/architecture-overview.md).

# Architecture Overview

BrownFi V3 consists of five core smart contracts and a set of supporting facilities:

* Factory: Creates new V3 pair pools (permissioned to pool creator role).
* Router: Handles user-facing swap computations — both forward (amountIN given) and backward (amountOUT given) — and routes amounts to/from pair contracts.
* Oracle Gateway: Aggregates price from multiple sources (Pyth, Chainlink, Redstone, on-chain AMM TWAP), computes skew price and pre-trade spread price, and feeds them to pair contracts.
* Pair Contract (V3 Pool): Holds token reserves, executes add/remove LP, performs inventory verification per swap, mints protocol fee LP tokens. Each pool has distinct base and quote tokens.
* Config Contract: Stores all configurable parameters (Kappa, fee, spread, skewness, gamma) outside the pool contract, enabling dynamic adjustment without redeployment.

<figure><img src="/files/ueAzkUqoNhXP03Oquazd" alt=""><figcaption></figcaption></figure>


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