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diff --git a/contrib/message-capture/message-capture-docs.md b/contrib/message-capture/message-capture-docs.md new file mode 100644 index 0000000000..7301968461 --- /dev/null +++ b/contrib/message-capture/message-capture-docs.md @@ -0,0 +1,25 @@ +# Per-Peer Message Capture + +## Purpose + +This feature allows for message capture on a per-peer basis. It answers the simple question: "Can I see what messages my node is sending and receiving?" + +## Usage and Functionality + +* Run `bitcoind` with the `-capturemessages` option. +* Look in the `message_capture` folder in your datadir. + * Typically this will be `~/.bitcoin/message_capture`. + * See that there are many folders inside, one for each peer names with its IP address and port. + * Inside each peer's folder there are two `.dat` files: one is for received messages (`msgs_recv.dat`) and the other is for sent messages (`msgs_sent.dat`). +* Run `contrib/message-capture/message-capture-parser.py` with the proper arguments. + * See the `-h` option for help. + * To see all messages, both sent and received, for all peers use: + ``` + ./contrib/message-capture/message-capture-parser.py -o out.json \ + ~/.bitcoin/message_capture/**/*.dat + ``` + * Note: The messages in the given `.dat` files will be interleaved in chronological order. So, giving both received and sent `.dat` files (as above with `*.dat`) will result in all messages being interleaved in chronological order. + * If an output file is not provided (i.e. the `-o` option is not used), then the output prints to `stdout`. +* View the resulting output. + * The output file is `JSON` formatted. + * Suggestion: use `jq` to view the output, with `jq . out.json` |