> For the complete documentation index, see [llms.txt](https://docs.anchorprotocol.com/anchor-2/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.anchorprotocol.com/anchor-2/ethanchor/ethanchor-contracts.md).

# EthAnchor Contracts

{% hint style="danger" %}
EthAnchor is scheduled for deprecation and is to be replaced with xAnchor. It is highly recommended that new integrations are built with [xAnchor](https://docs.anchorprotocol.com/protocol/xanchor) and not with EthAnchor.
{% endhint %}

EthAnchor contracts are Ethereum smart contracts that facilitate cross-chain Anchor deposits. They primarily consist of [Operation](/anchor-2/ethanchor/ethanchor-contracts.md#operation), [Router](/anchor-2/ethanchor/ethanchor-contracts.md#router), [ConversionPool](/anchor-2/ethanchor/ethanchor-contracts.md#conversionpool), and [ExchangeRateFeeder](/anchor-2/ethanchor/ethanchor-contracts.md#exchangeratefeeder) contracts.

## Operation

Operation contracts are address-specifically generated smart contracts used to isolate individual EthAnchor deposit/redeem operations. They take in information about a specific request, later used to process the operation.

Operation contracts are crucial for distinguishing between operations requested by different users, and are structured to process a single request at a time.

## Router

The Router contract is responsible for routing incoming deposit/redeem operations to an available Operation contract. The Router owns multiple Operation contracts for processing user requests.

![](/files/-Mbq8zqFKilmRTr0TeYj)

## ConversionPool

ConversionPool contracts manage the conversion between non-UST stablecoins and UST, which are subsequently deposited to Anchor through the Router.

A proxy contract lies above the Router and ConversionPool contracts for routing requests to the most recent contract version.

![](/files/-Mbq99_VIkUYghbuGQFQ)

## ExchangeRateFeeder

The ExchangeRateFeeder contract calculates and determines the exchange rate between non-UST stablecoins and their aTerra counterparts.