diff --git a/geoip2.go b/geoip2.go
new file mode 100644
index 0000000..69a805c
--- /dev/null
+++ b/geoip2.go
@@ -0,0 +1,78 @@
+package geoip2
+
+import (
+	"context"
+	"fmt"
+	"net/netip"
+	"strings"
+)
+
+// ErrNotFound is returned when the database does not contain the IP address.
+const ErrNotFound = "not found"
+
+// Info is a structure that contains information about the IP address.
+type Info struct {
+	// IP is the IP address.
+	IP netip.Addr
+	// ISOCode is the ISO code of the country.
+	ISOCode string
+	// Continent is the continent.
+	Continent string
+	// Country is the country.
+	Country string
+	// City is the city.
+	City string
+	// CitySubdivisions is the list of subdivisions.
+	CitySubdivisions []string
+	// TimeZone is the time zone.
+	TimeZone string
+}
+
+// ToString returns a string representation of the Info structure.
+func (i Info) ToString() string {
+	var data []string
+
+	if i.Continent != "" {
+		data = append(data, i.Continent)
+	}
+
+	if i.ISOCode != "" {
+		data = append(data, i.ISOCode)
+	}
+
+	if i.Country != "" {
+		data = append(data, i.Country)
+	}
+
+	if len(i.CitySubdivisions) > 0 {
+		data = append(data, strings.Join(i.CitySubdivisions, ", "))
+	}
+
+	if i.City != "" {
+		data = append(data, i.City)
+	}
+
+	return fmt.Sprintf("%s (%s) time zone: %s",
+		i.IP.String(),
+		strings.Join(data, "/"),
+		i.TimeZone,
+	)
+}
+
+// GeoIP2 is an interface for geoip2.
+type GeoIP2 interface {
+	Info(ip netip.Addr) (Info, error)
+}
+
+// RefreshableGeoIP2 is an interface for geoip2 with refresh and close functionality.
+type RefreshableGeoIP2 interface {
+	GeoIP2
+	Refresh(ctx context.Context) error
+	Close() error
+}
+
+// Logger is an interface for logging.
+type Logger interface {
+	// Error logs an error.
+	Error(err error)
+}