ConfirmPairAvailability takes a list of pairs that are meant to be subscribed to, and uses the given provider's GetAvailablePairs method to check that the given pairs can be subscribed to.

NewAstroportProvider returns a new AstroportProvider.

NewBitgetProvider returns a new Bitget provider with the WS connection and msg handler.

NewCoinbaseProvider creates a new CoinbaseProvider.

NewGateProvider creates a new GateProvider.

NewHuobiProvider returns a new Huobi provider with the WS connection and msg handler.

NewKrakenProvider returns a new Kraken provider with the WS connection and msg handler.

NewOkxProvider creates a new OkxProvider.

PastUnixTime returns a millisecond timestamp that represents the unix time minus t.

SecondsToMilli converts seconds to milliseconds for our unix timestamps.

TelemetryFailure gives an standard way to add `price_feeder_failure_provider{type="x", provider="x"}` metric.

AstroportTickerPairs is a struct to hold the AstroportTickersResponse and the corresponding pair.