bug: on-chain payment after a dropped electrum connection never broadcasts and shows outcome unknown #1526

Twin: synonymdev/bitkit-ios#967
Refs:

• On-chain send reports success before broadcast is attempted; failed broadcast leaves inputs marked spent #1143
• fix: report on-chain broadcast outcomes ldk-node#119

What happened?

Bitkit Android uses the same ldk-node Electrum client (0.7.0-rc.74) that left Bitkit iOS unable to broadcast in synonymdev/bitkit-ios#967. When the Electrum server drops the connection while a call is waiting on it, that client never reconnects: wallet sync, fee updates and every broadcast fail with Broken pipe until the node restarts. An on-chain send in that state:

• fails every broadcast attempt although nothing reached the network;
• is reported as "outcome unknown" instead of "not sent";
• is never rebroadcast after the connection comes back.

Expected behavior

• A lost Electrum connection is rebuilt on the next call, so a send after the drop broadcasts normally.
• When no broadcast attempt reached the server, Bitkit says the payment was not sent and offers a retry.
• A payment with an unknown outcome is rebroadcast once the connection is back, while its payment request is still valid.

Steps to Reproduce

1. Open Bitkit with an on-chain balance and a Paykit payment request (e.g. Pubky Shop checkout).
2. Leave the app idle or in the background until the Electrum server drops the connection while a sync or fee update is waiting on it.
3. Pay the request on-chain.

Logs / Screenshots / Recordings

Reproduced at the ldk-node level by a test that drops the Electrum connection with a queued call: every following broadcast fails with three Broken pipe attempts within a millisecond and returns Unknown. iOS device log in synonymdev/bitkit-ios#967.

Bitkit Version

3.0.0 RC2 (ldk-node 0.7.0-rc.74)

Device / OS

Android, all devices (shared ldk-node code)

Reproducibility

Seen on iOS; Android shares the ldk-node code path, not yet seen on an Android device.

Additional context

On-chain via Paykit is the Shop's launch payment path, so this blocks 3.0.0.