Occasional RPC error when running offline

[erikarvstedt]

When starting trustedcoin in an offline environment, it sometimes fails with:

error: bad response to getchaininfo (bad 'result' field: Parsing '{result:': object does not have member result), response was {"jsonrpc":"2.0","id":"cln:getchaininfo#15","error":{"code":20,"message":"failed to get tip: Get \"https://mempool.space/api/blocks/tip/height\": dial tcp: lookup mempool.space: no such host","data":null}}

This causes the clightning process to exit with a failure.

cc @seberm

[seberm]

Hello,
The trustedcoin will try to get the current tip from all of the esploras. If all of the esploras are offline or trustedcoin can't reach them / DNS not working, it will return the error to CLN and CLN exits with a failure.

I think we could modify the code in a way it will loop over esploras "forever" until it succeeds or we get a shutdown from CLN.

What do you think should be a correct behavior in this case?

Thanks