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

# Architecture

The PawnSpace architecture consists mainly of 3 main contracts.

* `PawnFactory.sol`
* `PawnSpace.sol`
* `PawnOffer.sol`

Let us go through what each contract does in brief:

### `PawnFactory.sol`

The protocol begins with a `Factory` contract which deploys a `PawnSpace` for each existing NFT contract on the parent chain. A `PawnSpace` consists of two smart contracts: one to house the `Order` NFTs, and another to house the `Offer` NFTs.

### `PawnSpace.sol`

`PawnSpace.sol` keeps track of `Orders` and their specific parameters. It contains functions for creating `Orders`, modifying `auto-accept/instant-loan` parameters, accepting `Orders`, paying back loans, and withdrawing an NFT from a defaulted loan.

### `PawnOffer.sol`

It primarily tracks the `Offers` in the protocol. The `Offer` contract contains functions for creating `Offers` towards an existing `Order`, and auto-accepting loans.

{% hint style="info" %}
Cancelling/burning offers and orders that are in-active is also possible.
{% endhint %}