FIX
Paxos recommends following FIX industry best practices, in addition to the items outlined below.
Identity Mapping
Use the following table to map Paxos identify information to the corresponding FIX tag.
| Paxos Identity | FIX Tag |
|---|---|
| User ID | Account (1) |
| Wallet ID | ClientID (109) |
| Client’s CompID | SenderCompID (49) |
| Paxos’ CompID | TargetCompID (56) |
Sequence Number Management
Periodically disconnecting the FIX connection. Resetting the message sequence number promotes a stable trading environment for all users. Paxos forces a disconnect and reset of sequence numbers weekly for all sessions.
The exact time when the disconnect and reset to sequence numbers happen is discussed during the onboarding process. Clients must configure their FIX engines to expect a disconnect and sequence number reset at the agreed schedule, failure to do so will result in an invalid FIX session due to mismatching sequence numbers.
Schedule times follow the US Eastern Time Zone (ET), an area five hours behind Greenwich Mean Time (GMT-5) during the winter months (referred to as Eastern Standard Time or EST) and four hours behind Greenwich Mean Time (GMT-4) during the summer months (referred to as Eastern Daylight Time or EDT).
Paxos Support may contact you regarding connection practices to prevent performance degradation.
Cancel on Disconnect
Cancel on Disconnect is enabled by default. When a disconnection occurs, the service automatically submits a cancel request for all open orders.
Use Multiple connections
FIX supports multiple connections per trading account. Please submit a request to connectivity@paxos.com to request additional connections.
Implementation Testing
Test the FIX implementation by following the FIX certification process in the Sandbox environment prior to going live in Production.