> For the complete documentation index, see [llms.txt](https://docs.keeta.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.keeta.com/anchors/anchor-types/fx-foreign-exchange.md).

# FX (Foreign Exchange)

The FX Anchor service enables currency and token conversions on Keeta. It connects users who want to swap between different assets with liquidity providers who offer exchange services.

### Understanding FX Anchors

An FX Anchor operates like a decentralized exchange interface:

1. **Discovery**: Clients find FX providers using the Resolver
2. **Quote Request**: User requests a price for a conversion
3. **Quote Response**: Provider returns a signed quote with rate and fees
4. **Exchange**: User submits a block swapping tokens with the provider
5. **Settlement**: Provider completes the swap atomically on-chain

The SDK handles the quote signing, verification, and atomic swap construction, ensuring both parties are protected.

### Core Concepts

**Conversion Input**

Every FX operation starts with a `ConversionInput` specifying:

* **from**: The token you have
* **to**: The token you want
* **amount**: How much to convert
* **affinity**: Whether amount refers to 'from' (you have this much) or 'to' (you want this much)

**Quotes vs Estimates**

* **Estimate**: Non-binding price indication, useful for showing users expected rates
* **Quote**: Binding commitment from provider with signature, required for execution

**Floating vs Fixed Rate**

* **Fixed Rate (with quote)**: Price locked at quote time, guaranteed regardless of market movement
* **Floating Rate (without quote)**: Price determined at execution time, may be better or worse than estimate

### Basic Client FX Flow

{% @github-files/github-code-block url="<https://github.com/KeetaNetwork/keetanet-examples/blob/main/src/anchor/fx-client.ts>" %}


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