Venue error reference

order_version_mismatch

Machine-readable preflight context for agents that see this venue failure mode.

class
R1_WALLET_BINDING
code
UNSUPPORTED_SIGNATURE_TYPE

What preflight checks

Check active venue protocol and signature binding before constructing an order.

Agent instruction

Treat recent venue rule changes as blocking until the signer and SDK path are confirmed current.

GET /v1/preflight/{venue}/{market_id}
if verdict in ["DO_NOT_ACT", "INSUFFICIENT_EVIDENCE"]:
    do_not_submit()

Operational diagnostics only. No execution, no custody, no order signing, no advice.