package resolver

import "errors"

// Sentinel errors returned by the resolver.
var (
	// ErrNotImplemented indicates a method is stubbed out.
	ErrNotImplemented = errors.New(
		"resolver not yet implemented",
	)

	// ErrNoNameservers is returned when no authoritative NS
	// could be discovered for a domain.
	ErrNoNameservers = errors.New(
		"no authoritative nameservers found",
	)

	// ErrCNAMEDepthExceeded is returned when a CNAME chain
	// exceeds MaxCNAMEDepth.
	ErrCNAMEDepthExceeded = errors.New(
		"CNAME chain depth exceeded",
	)

	// ErrContextCanceled wraps context cancellation for the
	// resolver's iterative queries.
	ErrContextCanceled = errors.New("context canceled")
)