Manage nodes that does not support TRX Lookups

This feature is very usefull, but some nodes has lookup by TRX disbaled, making the example code above crash and fail. With a few minor changes we can handle these issues.

import beemapi

.....
while not trx_id_found and delay < 120:
            print("- Checking trx_id....")
            try:
                trx_id_found = hiveBlockchain.is_transaction_existing(trx_id)
            except beemapi.exceptions.RPCError as err:
                old_node_url = hive.rpc.url
                hive.rpc.next()
                new_node_url = hive.rpc.url
                print("Caught RPC Error: %s " % (err))
                print("Switching from %s to %s" % (old_node_url, new_node_url))
            time.sleep(10)
            delay += 10
        if not trx_id_found:
            print("- Cound not broadcast!")
.....

What this code does is that if we have an exception with "RPCError" we will switch node to the next one.

Example Output

- Checking trx_id....
Caught RPC Error: Assert Exception:false: This node's operator has disabled operation indexing by transaction_id
Switching from https://rpc.ausbit.dev to https://hive.roelandp.nl
- Checking trx_id....
- Checking trx_id....