# Contract Mappings

- [Order Types](/developers-dex/contract-mappings/order-types.md)
- [Fill Types](/developers-dex/contract-mappings/fill-types.md)
- [Order Status](/developers-dex/contract-mappings/order-status.md): Status of an order
- [Order Side](/developers-dex/contract-mappings/order-side.md): Order side represents whether user want to buy or sell tokens.
- [Status codes for markets](/developers-dex/contract-mappings/status-codes-for-markets.md)
- [Common Errors](/developers-dex/contract-mappings/common-errors.md)