> For the complete documentation index, see [llms.txt](https://docs.tradeflows.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tradeflows.io/tradeflows/smart-contracts.md).
# Smart Contracts
Testing environment on StarkNet Goerli
The protocol is based on three infrastructure Smart Contracts that are used to power the entire infrastructure:
* **DAO**: Custom ERC20 contract that represents the ownership of the DAO. This contract is also the treasury to which all Trade Init / Minting fees go to.
* **txAsset**: Custom ERC721 contract that stores the terms of the asset as a minted NFT. This contract also contains the functionality that allows the buyer to agree to the asset and the NFT is also the receiver of the programmed payment stream.
* **txEscrow**: Custom ERC1155 contract that wraps around the ownership of an escrow account.
* **txDharma**: Custom ERC20 contract that is non-transferable and mintable. Community members that are in an active trade are able to mint these tokens to their counterpart's wallets or burn them when attributing a negative score.
Additionally, we have a set of ERC20 wrapper contracts that enable all custom streaming and escrow functionality:
* **txFlow**: Custom ERC20 contract that wraps around the target token, eg. USDC, and contains the streaming and self-custody functionality. This contract is also extended to attribute a balance to any ERC721 contract.
We have deployed a set of contracts to the StarkNet Goerli testnet in order to test all of the functionality in this document. More on this below.
## Goerli Testnet
During this alpha phase, we are deploying a set of test contracts to the Goerli Starknet testnet. The production contract will be deployed at a later date on to mainnet.
⚠️ WARNING! ⚠️ All of the contract addresses below will change as we iterate rapidly during these initial phases. Please keep a look out for changes in these addresses.
### Infrastructure Alpha on Goerli Testnet