Metrics endpoint output format

[elmurci]

Detailed Description

As of now, the format returned by the metrics endpoint (GET /metrics) seems to be tight to Prometheus:

# HELP payid_lookup_request count of requests to lookup a PayID
# TYPE payid_lookup_request counter
payid_lookup_request{paymentNetwork="XRPL",environment="TESTNET",org="payid.es",result="found"} 68
...
# HELP payid_count count of total PayIDs
# TYPE payid_count gauge
payid_count{paymentNetwork="BTC",environment="MAINNET",org="payid.app"} 1
payid_count{paymentNetwork="ETH",environment="TESTNET",org="payid.app"} 1
payid_count{paymentNetwork="XRPL",environment="MAINNET",org="payid.app"} 6
payid_count{paymentNetwork="XRPL",environment="TESTNET",org="payid.app"} 3

Request to abstract from the destination tool (Prometheus or whatever reporting tool is chosen) and adopt JSON as format so it is easier to read and transform.

Context

Easier processing by middlewares and reporting tools.

[0xCLARITY]

Just to clarify, this is about changing the format of metrics when you hit the GET /metrics endpoint to JSON, correct?

[elmurci]

Sorry, yes. Will clarify in the description.

[MarkusTeufelberger]

JSON isn't a specific format for metrics, at most it could make sense to expose them in https://openmetrics.io/ format.