Update devnonce encoding.

Author: brocaar

README.md

@@ -45,7 +45,7 @@ database will be removed!
 
 ## Notes
 
-* This utility is compatible with the ChirpStack v4.8.1 database schema.
+* This utility is compatible with the ChirpStack v4.10.2 database schema.
 * This utility does not support [environment variables](https://www.chirpstack.io/docs/chirpstack/configuration.html#environment-variables) in configuration files, like ChirpStack does.
 
 ## Building from source

main.go

@@ -1917,13 +1917,20 @@ func migrateDeviceKeysFn(tx *sqlx.Tx, devEUIs [][]byte) {
 			}
 		}
 
+		devNoncesJSON, err := json.Marshal(map[string][]int64{
+			"0000000000000000": devNonces,
+		})
+		if err != nil {
+			log.Fatal("Marshal DevNonces error")
+		}
+
 		_, err = stmt.Exec(
 			dk.DevEUI,
 			dk.CreatedAt,
 			dk.UpdatedAt,
 			dk.NwkKey,
 			dk.AppKey,
-			pq.Int64Array(devNonces),
+			string(devNoncesJSON),
 			dk.JoinNonce,
 		)
 		if err != nil {