Recreate filters if not exists

[wpater]

On the substrate/moonbeam side (https://github.com/paritytech/frontier/blob/fba84577bf6507d76d40af891d2db38f4e385c11/template/node/src/eth.rs#L210 or https://github.com/PureStake/moonbeam/blob/946ee85591626eb9dc21f127bc301be50316546f/node/service/src/rpc.rs#L403) filters exists for 100 blocks and then are deleted.
I created listener for the events and it is working just fine but after 100 blocks I see below log in the evm-connect service:

2023-06-13T11:28:34.375Z] DEBUG evmconnect: ChainHead=1290 eventstream=0188b401-c924-578d-914d-0a26f49c33d5
...
[2023-06-13T11:28:34.401Z] ERROR evmconnect: RPC[000012919] <-- [200]: Filter id 4 does not exist. role=blocklistener
[2023-06-13T11:28:34.401Z] ERROR evmconnect: Failed to query block filter changes: Filter id 4 does not exist. role=blocklistener
[2023-06-13T11:28:34.401Z] DEBUG evmconnect: Retrying after 30.00 (failures=43) role=blocklistener

and this block 1290 is old (current head for my node is 2k+ right now).

I am using evm-connect v1.2.11.

Is it possible to implement some retry mechanism to recreate filters if they are not exist and find missed blocks/events?

[nguyer]

The filter should get recreated if the blockchain connector restarts or reconnects. But it likely doesn't account for the possibility that it may suddenly not exist anymore. That seems like a bug in the RPC node that you're connected to. What RPC node are you currently using? Does this happen with other RPC nodes on the same chain?