Merge pull request 'v0.1.2' (#3) from develop into main

Reviewed-on: #3

geoip2.go

@@ -2,13 +2,14 @@ package geoip2
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/netip"
 	"strings"
 )
 
 // ErrNotFound is returned when the database does not contain the IP address.
-const ErrNotFound = "not found"
+var ErrNotFound = errors.New("not found")
 
 // Info is a structure that contains information about the IP address.
 type Info struct {

service/maxmind/mmdb/city.go

@@ -1,7 +1,6 @@
 package mmdb
 
 import (
-	"errors"
 	"net/netip"
 
 	"git.kor-elf.net/kor-elf-shield/geoip2"
@@ -47,7 +46,7 @@ func (c *City) infoCity(ip netip.Addr, reader *oschwaldGeoip2.Reader) (geoip2.In
 		return geoip2.Info{}, err
 	}
 	if !record.HasData() {
-		return geoip2.Info{}, errors.New(geoip2.ErrNotFound)
+		return geoip2.Info{}, geoip2.ErrNotFound
 	}
 
 	var timeZone string