CalcSpread calculates the spread stats for the given bidMax and askMin orderbook values.

GetAssetString returns a string representation of an asset.

PanicIfError is an utility function that panics if err != nil.

SliceDiff returns the elements in `a` that aren't in `b`.

TimeToTimestamp converts a time.Time into a Unix epoch.

WriteJSONToFile wrtites a json []byte dump to <filename>.