Make Observer compatible with v11 rpc.get_transactions

[martin-braun]

v11 oxend returns transactions such as:

{'block_height': 1346532, 'block_timestamp': 1687119982, 'burned': 0, 'extra': {'pubkey': ['9b6bbbdd5d95c61d8607a064b37c4f1a698c1c40967423a8ce099f091d7eed6c', 'a5a8665140ff7d7e16b7ff1f5774d853fb9e86568c44306c7e959d769bd7e1f2'], 'sn_winner': '15c4735336fe811ccd12214ae172fbe04cfb8679b5e9255fab325bba66e30b31'}, 'fee': 0, 'output_indices': [5373787, 5373788], 'output_unlock_times': [1346562, 1346562], 'prunable_hash': 'c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470', 'pruned': '040282985282985282985201ffe497520299b2a5cd58027ae2305171a553747b49638946860d37609516cf9c8e6a06da55a9fe33b2e00f99b2a5cd58026527bcddbb41e0ca74e1ebc1cfefbcf6cda0b08fee5d8c74f2eed3fced6259de63019b6bbbdd5d95c61d8607a064b37c4f1a698c1c40967423a8ce099f091d7eed6c01a5a8665140ff7d7e16b7ff1f5774d853fb9e86568c44306c7e959d769bd7e1f27215c4735336fe811ccd12214ae172fbe04cfb8679b5e9255fab325bba66e30b310000', 'rct_signatures': {'type': 0}, 'size': 195, 'tx_hash': 'aa25357f961be3d3f3554d152c581061695b73e07df384991997f0b38f0dadbd', 'type': 0, 'unlock_time': 1346562, 'version': 4, 'vin': [{'gen': {'height': 1346532}}], 'vout': [{'amount': 23784413465, 'target': {'key': '7ae2305171a553747b49638946860d37609516cf9c8e6a06da55a9fe33b2e00f'}}, {'amount': 23784413465, 'target': {'key': '6527bcddbb41e0ca74e1ebc1cfefbcf6cda0b08fee5d8c74f2eed3fced6259de'}}]}

So, there is no info, thus the observer tries to parse info from as_json, but this is missing since v11, hence:

KeyError: 'as_json'Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/flask/app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/lib/python3/dist-packages/flask/app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/lib/python3/dist-packages/flask/app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/lib/python3/dist-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/usr/lib/python3/dist-packages/flask/app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/lib/python3/dist-packages/flask/app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/media/psf/Home/git/gh/oxen-io/oxen-observer/observer.py", line 330, in main
    txs = parse_txs(tx_req(omq, oxend, txids, cache_key='mempool').get())
  File "/media/psf/Home/git/gh/oxen-io/oxen-observer/observer.py", line 642, in parse_txs
    tx['info'] = json.loads(tx["as_json"])
KeyError: 'as_json'

See

oxen-observer/observer.py

Line 641 in 0cafbba

tx['info'] = json.loads(tx["as_json"])