diff --git a/Cargo.lock b/Cargo.lock
index 26f9659..19befa5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1872,6 +1872,14 @@ dependencies = [
  "tokio-native-tls",
 ]
 
+[[package]]
+name = "i18n-files"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "syn",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
@@ -3582,9 +3590,9 @@ checksum = "6bdef32e8150c2a081110b42772ffe7d7c9032b606bc226c8260fd97e0976601"
 
 [[package]]
 name = "syn"
-version = "1.0.92"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ff7c592601f11445996a06f8ad0c27f094a58857c2f89e97974ab9235b92c52"
+checksum = "a07e33e919ebcd69113d5be0e4d70c5707004ff45188910106854f38b960df4a"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index 57dc606..825275b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,8 @@ members = [
     "actors/search_manager",
     "actors/token_manager",
     "actors/fs_manager",
-    "db-seed"
+    "db-seed",
+    "derive/i18n-files"
 ]
 
 [profile.release]
diff --git a/derive/i18n-files/Cargo.toml b/derive/i18n-files/Cargo.toml
new file mode 100644
index 0000000..50ad7a7
--- /dev/null
+++ b/derive/i18n-files/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "i18n-files"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = { version = "1.0.38" }
+syn = { version = "1.0.94" }
diff --git a/derive/i18n-files/src/lib.rs b/derive/i18n-files/src/lib.rs
new file mode 100644
index 0000000..cdf6486
--- /dev/null
+++ b/derive/i18n-files/src/lib.rs
@@ -0,0 +1,7 @@
+extern crate proc_macro;
+use proc_macro::TokenStream;
+
+#[proc_macro]
+pub fn lang(_item: TokenStream) -> TokenStream {
+    "fn answer() -> u32 { 42 }".parse().unwrap()
+}
diff --git a/shared/model/src/api.rs b/shared/model/src/api.rs
index 19d8571..4402721 100644
--- a/shared/model/src/api.rs
+++ b/shared/model/src/api.rs
@@ -16,6 +16,8 @@ pub struct Config {
     pub pay_methods: Vec<PaymentMethod>,
     pub coupons: bool,
     pub currency: String,
+    pub shipping: bool,
+    pub shipping_methods: Vec<String>,
 }
 
 #[cfg_attr(feature = "dummy", derive(fake::Dummy))]
diff --git a/shared/model/src/lib.rs b/shared/model/src/lib.rs
index 4273d84..f4e6717 100644
--- a/shared/model/src/lib.rs
+++ b/shared/model/src/lib.rs
@@ -397,7 +397,7 @@ impl<'de> serde::Deserialize<'de> for Email {
 #[serde(transparent)]
 pub struct NonNegative(i32);
 
-impl std::ops::Add for NonNegative {
+impl ops::Add for NonNegative {
     type Output = Self;
 
     fn add(self, rhs: Self) -> Self::Output {
@@ -405,7 +405,7 @@ impl std::ops::Add for NonNegative {
     }
 }
 
-impl std::ops::Sub for NonNegative {
+impl ops::Sub for NonNegative {
     type Output = Self;
 
     fn sub(self, rhs: Self) -> Self::Output {
@@ -557,7 +557,7 @@ impl TryFrom<i32> for Day {
 #[serde(transparent)]
 pub struct Days(Vec<Day>);
 
-impl std::ops::Deref for Days {
+impl ops::Deref for Days {
     type Target = Vec<Day>;
 
     fn deref(&self) -> &Self::Target {
@@ -591,12 +591,7 @@ where
 {
     fn decode(
         value: <sqlx::Postgres as ::sqlx::database::HasValueRef<'r>>::ValueRef,
-    ) -> ::std::result::Result<
-        Self,
-        ::std::boxed::Box<
-            dyn ::std::error::Error + 'static + ::std::marker::Send + ::std::marker::Sync,
-        >,
-    > {
+    ) -> Result<Self, Box<dyn Error + 'static + Send + Sync>> {
         let value = <i32 as ::sqlx::decode::Decode<'r, sqlx::Postgres>>::decode(value)?;
         Ok(Days(
             (0..7)
@@ -1102,3 +1097,12 @@ pub struct ProductPhoto {
     pub product_id: ProductId,
     pub photo_id: PhotoId,
 }
+
+#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
+#[cfg_attr(feature = "db", derive(sqlx::FromRow))]
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "snake_case")]
+pub enum ShippingMethod {
+    InPost,
+    Custom(String),
+}