Soft decline → silent failover.
VORA reads the issuer response code and decides whether the decline is recoverable. If it is, the charge re-fires against the next-best route inside 2 seconds — the buyer never sees a failure screen.
Recoverable codes: 05, 51, 65, 91 — and a handful of vertical-specific ones. Hard declines (14, 41, 43) skip the retry.