NewSpanID creates a new SpanID from a 64bit unsigned int.

NewTraceID creates a new TraceID from two 64bit unsigned ints.

SpanIDFromString creates a SpanID from a hexadecimal string.

TraceIDFromString creates a TraceID from a hexadecimal string.

TraceID is a random 128bit identifier for a trace.

SpanID is a random 64bit identifier for a span.