codegen: Use v15 for codegen

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

codegen/src/api/calls.rs

@@ -7,7 +7,7 @@ use crate::{
     types::{CompositeDefFields, TypeGenerator},
     CratePath,
 };
-use frame_metadata::{v14::RuntimeMetadataV14, PalletMetadata};
+use frame_metadata::v15::{PalletMetadata, RuntimeMetadataV15};
 use heck::{ToSnakeCase as _, ToUpperCamelCase as _};
 use proc_macro2::TokenStream as TokenStream2;
 use quote::{format_ident, quote};
@@ -23,7 +23,7 @@ use scale_info::form::PortableForm;
 /// - `pallet` - Pallet metadata from which the calls are generated.
 /// - `types_mod_ident` - The ident of the base module that we can use to access the generated types from.
 pub fn generate_calls(
-    metadata: &RuntimeMetadataV14,
+    metadata: &RuntimeMetadataV15,
     type_gen: &TypeGenerator,
     pallet: &PalletMetadata<PortableForm>,
     types_mod_ident: &syn::Ident,

codegen/src/api/constants.rs

@@ -3,7 +3,7 @@
 // see LICENSE for license details.
 
 use crate::{types::TypeGenerator, CratePath};
-use frame_metadata::{v14::RuntimeMetadataV14, PalletMetadata};
+use frame_metadata::v15::{PalletMetadata, RuntimeMetadataV15};
 use heck::ToSnakeCase as _;
 use proc_macro2::TokenStream as TokenStream2;
 use quote::{format_ident, quote};
@@ -35,7 +35,7 @@ use super::CodegenError;
 /// - `pallet` - Pallet metadata from which the calls are generated.
 /// - `types_mod_ident` - The ident of the base module that we can use to access the generated types from.
 pub fn generate_constants(
-    metadata: &RuntimeMetadataV14,
+    metadata: &RuntimeMetadataV15,
     type_gen: &TypeGenerator,
     pallet: &PalletMetadata<PortableForm>,
     types_mod_ident: &syn::Ident,

codegen/src/api/events.rs

@@ -3,7 +3,7 @@
 // see LICENSE for license details.
 
 use crate::{types::TypeGenerator, CratePath};
-use frame_metadata::PalletMetadata;
+use frame_metadata::v15::PalletMetadata;
 use proc_macro2::TokenStream as TokenStream2;
 use quote::quote;
 use scale_info::form::PortableForm;

codegen/src/api/mod.rs

@@ -9,6 +9,7 @@ mod constants;
 mod events;
 mod storage;
 
+use frame_metadata::v15::RuntimeMetadataV15;
 use subxt_metadata::get_metadata_per_pallet_hash;
 
 use super::DerivesRegistry;
@@ -20,7 +21,7 @@ use crate::{
     CratePath,
 };
 use codec::Decode;
-use frame_metadata::{v14::RuntimeMetadataV14, RuntimeMetadata, RuntimeMetadataPrefixed};
+use frame_metadata::{RuntimeMetadata, RuntimeMetadataPrefixed};
 use heck::ToSnakeCase as _;
 use proc_macro2::TokenStream as TokenStream2;
 use quote::{format_ident, quote};
@@ -152,7 +153,7 @@ pub fn generate_runtime_api_from_bytes(
 
 /// Create the API for interacting with a Substrate runtime.
 pub struct RuntimeGenerator {
-    metadata: RuntimeMetadataV14,
+    metadata: RuntimeMetadataV15,
 }
 
 impl RuntimeGenerator {
@@ -161,9 +162,17 @@ impl RuntimeGenerator {
     /// **Note:** If you have the metadata path, URL or bytes to hand, prefer to use
     /// one of the `generate_runtime_api_from_*` functions for generating the runtime API
     /// from that.
+    ///
+    /// # Panics
+    ///
+    /// If the metadata version is not supported by subxt.
+    /// Only v14 and v15 versions are supported.
     pub fn new(metadata: RuntimeMetadataPrefixed) -> Self {
         match metadata.1 {
-            RuntimeMetadata::V14(v14) => Self { metadata: v14 },
+            RuntimeMetadata::V14(v14) => Self {
+                metadata: subxt_metadata::metadata_v14_to_latest(v14),
+            },
+            RuntimeMetadata::V15(v15) => Self { metadata: v15 },
             _ => panic!("Unsupported metadata version {:?}", metadata.1),
         }
     }

codegen/src/api/storage.rs

@@ -3,8 +3,8 @@
 // see LICENSE for license details.
 
 use crate::{types::TypeGenerator, CratePath};
-use frame_metadata::{
-    v14::RuntimeMetadataV14, PalletMetadata, StorageEntryMetadata, StorageEntryModifier,
+use frame_metadata::v15::{
+    PalletMetadata, RuntimeMetadataV15, StorageEntryMetadata, StorageEntryModifier,
     StorageEntryType,
 };
 use heck::ToSnakeCase as _;
@@ -24,7 +24,7 @@ use super::CodegenError;
 /// - `pallet` - Pallet metadata from which the storages are generated.
 /// - `types_mod_ident` - The ident of the base module that we can use to access the generated types from.
 pub fn generate_storage(
-    metadata: &RuntimeMetadataV14,
+    metadata: &RuntimeMetadataV15,
     type_gen: &TypeGenerator,
     pallet: &PalletMetadata<PortableForm>,
     types_mod_ident: &syn::Ident,
@@ -64,7 +64,7 @@ pub fn generate_storage(
 }
 
 fn generate_storage_entry_fns(
-    metadata: &RuntimeMetadataV14,
+    metadata: &RuntimeMetadataV15,
     type_gen: &TypeGenerator,
     pallet: &PalletMetadata<PortableForm>,
     storage_entry: &StorageEntryMetadata<PortableForm>,