Monero Watchman

An android app which observes a monero node for any reorganizations and will send the user a notification if there is one defined by their specifications.

How it works Once you hit Launch, a foreground service polls your node once a minute over JSON-RPC:

get_info gives the current chain height. get_block_headers_range pulls the last threshold + 10 block headers, which are kept as the baseline. On the next poll the same range is fetched again and compared to the baseline hash by hash. If the number of differing blocks reaches your reorg threshold, you get a notification with the reorg length and the fork point. The service keeps running with the app closed. If it can't reach the node on the first poll it sends a "Failed to connect to server" notification and stops, so you always know whether monitoring is actually running.

Features Notification on reorg, and on failure to connect to the node User-defined reorg threshold (1–50 blocks) Any node over HTTP or HTTPS Optional SOCKS proxy — point it at Tor (127.0.0.1:9050) for onion nodes Start on Boot, so monitoring resumes after a restart Settings persist across app closes and reboots "Default Values" button to get back to sane settings Prompts for the battery optimization exemption it needs to keep polling