def backoff_iso
import cswap-bend-cli@0.1.0.0/daemon/tick.bend as Tickimport Base
import cswap-bend-cli@0.1.0.0/clock.bend as Clock
import cswap-bend-cli@0.1.0.0/policy/types.bend as T
166def backoff_iso(+u: T.Usage, +now: Nat) -> Maybe<&2, String>:
167 match u:
168 case T.Usage{s, five, fr, seven, sr, ss, fa, +bo, er, fl, np, pi, ad, hu, cu, se}:
169 sel_bo(Nat.is_gt(bo, now), Some{Clock.iso8601_utc(secs(bo))}, None{})