A rescan or key import holds the node's cs_main for the whole wallet
scan. On the shared clients it hit the 30 s curl timeout, reported a
failure that wasn't one, abandoned a daemon RPC slot and flipped the app
into "node busy".
- One long wallet RPC at a time (rescan, importprivkey, importaddress,
importwallet, z_importkey, z_importviewingkey, z_importwallet) runs on
its own ungated client with no client timeout (rpc/long_call_lane.h).
It can be aborted from any thread, and an abort is never lost, even
one that lands before the client opens.
- The GUI rescan, key import and sweep use it. The sweep's fund-moving
body is unchanged; only the client it calls differs. runtimeRescan()
returns bool, and a refused post-bootstrap reconcile stays armed.
- The console routes rescan and the import commands through the lane;
its input stays usable meanwhile, and a refusal is printed like any
other result. RPCClient gains callRaw(.., timeoutSec).
- Restart, wallet switch, delete-chain, bootstrap (now also from
Settings) and the other node-stopping flows are refused while it runs,
with a message saying a key import or rescan is still running; quit
asks for confirmation. The lane is aborted at quit.
- A second import or rescan is refused before the key is copied anywhere.
An import cut off after the request reached the node (a lost reply,
or a proxy's 502/504 while the node still imports) says the key may
already be in the wallet and to run Settings -> Rescan. Only the
node's own HTTP-layer refusals (401, 503, work queue full, unhandled
request) say that the key was not imported. A pure
classifyLongCallCutOff() makes that choice.
- New strings in all 8 languages; console results stay English.
Tests: the long-method list and the console's routing; one lane at a
time; an abort lands whether it comes before the client opens or during
the call; a call with no client timeout outlasts a 3 s scan, where a 1 s
gated client times out and marks the node busy; classifyLongCallCutOff()
for every failure kind with and without a sent request, and from raw
HTTP replies (502, 504, a plain 500 -> cut off; 401, 503, queue full,
unhandled -> refused).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
DanSandClaude Opus 5.5
81733f5603