pub fn derive_crypto_venue(contract: &Contract) -> VenueExpand description
Derives the venue for a crypto contract.
IB routes crypto to multiple venues; both PAXOS and ZEROHASH are live (which one applies depends on the account/region). Uses the contract’s actual exchange when set (e.g. ZEROHASH or PAXOS), falling back to PAXOS when it is unspecified.