Q: How to decode contract events?

[BoboTiG]

Using RUES, I listen to withdrawal events, and I got something like:

b'\xbf\x00\x00\x00{"Content-Location":"/on/contracts:0200000000000000000000000000000000000000000000000000000000000000/withdraw","Rusk-Origin":"21a95b9c87290832d20d1087d43fa65f86a7555ab4690ead29aed26d223a1618"}\x00\x00\x00\x00\x00\x00\x00\x00\'m$\xb5\xb0w\xde\xa76\xeb\xe1\xed\xde%\xd9;KC\x03\xce\xd3a\x94\xd8{\xb3_Ox51\x00\xde\x13e\x98Y@\xd4p:\x14y\xbb\xec\xe5\x11\r\xf0\xf3\\\xa9;W\x7f\xe2\xe32\xb0\x13\x98XX\x84\x04P>\xc7\xa6=\xe7L\xee\x9e\x1f1\xde\'.\xe4n\xf3\x91\xae\x0c\x807\nZ;\x85\x10\xd9jZ\x12i\x08T\xc9:\x0bD\x90\xff\x8b\x96\x89?\xaaq\x8dI\x93\x8d8{=\x06\x03\x81dF\x8az\x01\x14\x04\xe4\x99}U\xa5\xc2"\xce\x11\x9c\xe2\x1a\xce\xed\xb8\x08W/\x94\xb4\xa6\xd8\x1e\xee\x9f\xf4\xfa\x16m\xb4*\x1f\x1d\xeb\xbeh@M\x00\x1dx\xe2\x9bK\xbb\x95\x07\x04y_\x92\xec_p];f\x19\xc4\x05m*\xb9\t\x00\x00\x00\x00\x00\x00\x00\x00\'m$\xb5\xb0w\xde\xa76\xeb\xe1\xed\xde%\xd9;KC\x03\xce\xd3a\x94\xd8{\xb3_Ox51\x00\xde\x13e\x98Y@\xd4p:\x14y\xbb\xec\xe5\x11\r\xf0\xf3\\\xa9;W\x7f\xe2\xe32\xb0\x13\x98XX\x84\x04P>\xc7\xa6=\xe7L\xee\x9e\x1f1\xde\'.\xe4n\xf3\x91\xae\x0c\x807\nZ;\x85\x10\xd9jZ\x12i\x08T\xc9:\x0bD\x90\xff\x8b\x96\x89?\xaaq\x8dI\x93\x8d8{=\x06\x03\x81dF\x8az\x01\x14\x04\xe4\x99}U\xa5\xc2"\xce\x11\x9c\xe2\x1a\xce\xed\xb8\x08W/\x94\xb4\xa6\xd8\x1e\xee\x9f\xf4\xfa\x16m\xb4*\x1f\x1d\xeb\xbeh@M\x00\x1dx\xe2\x9bK\xbb\x95\x07\x04y_\x92\xec_p];f\x19\xc4\x05m*\xb9\t\x00\x00\x00\x00\x00\x00\x00\x00\xee\xcd\xb7\xd8\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'

From the code (and if I read it correctly), this is ciphered data using staking keys.

For this example, I'm not the owner of the call, but lets imagine I have an event of mine. How can I decode the data to effectively know how many tokens I've withdrawed? (This question is about withdraw events, but it applies to any other events as well).

Note that I'm using Python to do the work, so maybe a rought process on how it should be done could be sufficient (given that the data can be decoded from the "outside").

[tminus92]

As per the docs:

The event is returned as raw binary data

You need to decode the raw binary data and convert that into an appropriate data structure. You can find an example on this test which basically represent the RUES lifecycle