initial commit

resolver/resolver.go

@@ -0,0 +1,17 @@
+package resolver
+
+import (
+	"context"
+	"errors"
+	"net"
+)
+
+var (
+	ErrInvalid = errors.New("resolver is invalid")
+)
+
+type Resolver interface {
+	// Resolve returns a slice of the host's IPv4 and IPv6 addresses.
+	// The network should be 'ip', 'ip4' or 'ip6', default network is 'ip'.
+	Resolve(ctx context.Context, network, host string) ([]net.IP, error)
+}