extrinsics: Decode extrinsics from blocks (#929)

* Update polkadot.scale Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics: Add extrinsics client Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics: Decode extrinsics Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * subxt: Add extrinsic error Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * blocks: Expose extrinsics Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * examples: Fetch and decode block extrinsics Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * Fix clippy Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics: Fetch pallet and variant index Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * subxt: Move extrinsics on the subxt::blocks Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * example: Adjust example Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * metadata: Collect ExtrinsicMetadata Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * subxt: Implement StaticExtrinsic for the calls Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * Adjust examples Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * codegen: Add root level Call enum Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * Adjust testing Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * subxt: Add new decode interface Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * subxt: Merge ExtrinsicError with BlockError Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * examples: Find first extrinsic Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * Move code to extrinsic_types Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * Add Extrinsic struct Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * Adjust examples Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * test: Decode extinsics Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics/test: Add fake metadata for static decoding Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics/test: Decode from insufficient bytes Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics/test: Check unsupported versions Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics/test: Statically decode to root and pallet enums Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics/tests: Remove clones Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * blocks: Fetch block body inline Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * blocks: Rename ExtrinsicIds to ExtrinsicPartTypeIds Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics/test: Check decode as_extrinsic Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * blocks: Remove InsufficientData error Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * blocks: Return error from extrinsic_metadata Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * extrinsics: Postpone decoding of call bytes Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * metadata_type: Rename variables Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * Adjust calls path for example and tests Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * examples: Remove traces Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * book: Add extrinsics documentation Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> * book: Improve extrinsics docs Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> --------- Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> Co-authored-by: James Wilson <james@jsdw.me>
2026-04-23 00:18:00 +00:00 · 2023-05-10 13:18:39 +03:00
parent b632ce7673
commit 3f16bb8d52
19 changed files with 6493 additions and 164 deletions
@@ -83,6 +83,11 @@ pub fn generate_calls(
            // The call structure's documentation was stripped above.
            let call_struct = quote! {
                #struct_def
+
+                impl #crate_path::blocks::StaticExtrinsic for #struct_name {
+                    const PALLET: &'static str = #pallet_name;
+                    const CALL: &'static str = #call_name;
+                }
            };

            let client_fn = quote! {
@@ -106,6 +111,7 @@ pub fn generate_calls(
        .into_iter()
        .unzip();

+    let call_type = type_gen.resolve_type_path(call.ty.id);
    let call_ty = type_gen.resolve_type(call.ty.id);
    let docs = &call_ty.docs;
    let docs = should_gen_docs
@@ -114,6 +120,7 @@ pub fn generate_calls(

    Ok(quote! {
        #docs
+        pub type Call = #call_type;
        pub mod calls {
            use super::root_mod;
            use super::#types_mod_ident;
@@ -367,6 +367,26 @@ impl RuntimeGenerator {
            }
        };

+        let outer_extrinsic_variants = self.metadata.pallets.iter().filter_map(|p| {
+            let variant_name = format_ident!("{}", p.name);
+            let mod_name = format_ident!("{}", p.name.to_string().to_snake_case());
+            let index = proc_macro2::Literal::u8_unsuffixed(p.index);
+
+            p.calls.as_ref().map(|_| {
+                quote! {
+                    #[codec(index = #index)]
+                    #variant_name(#mod_name::Call),
+                }
+            })
+        });
+
+        let outer_extrinsic = quote! {
+            #default_derives
+            pub enum Call {
+                #( #outer_extrinsic_variants )*
+            }
+        };
+
        let root_event_if_arms = self.metadata.pallets.iter().filter_map(|p| {
            let variant_name_str = &p.name;
            let variant_name = format_ident!("{}", variant_name_str);
@@ -385,6 +405,24 @@ impl RuntimeGenerator {
            })
        });

+        let root_extrinsic_if_arms = self.metadata.pallets.iter().filter_map(|p| {
+            let variant_name_str = &p.name;
+            let variant_name = format_ident!("{}", variant_name_str);
+            let mod_name = format_ident!("{}", variant_name_str.to_string().to_snake_case());
+            p.calls.as_ref().map(|_| {
+                // An 'if' arm for the RootExtrinsic impl to match this variant name:
+                quote! {
+                    if pallet_name == #variant_name_str {
+                        return Ok(Call::#variant_name(#mod_name::Call::decode_with_metadata(
+                            &mut &*pallet_bytes,
+                            pallet_ty,
+                            metadata
+                        )?));
+                    }
+                }
+            })
+        });
+
        let outer_error_variants = self.metadata.pallets.iter().filter_map(|p| {
            let variant_name = format_ident!("{}", p.name);
            let mod_name = format_ident!("{}", p.name.to_string().to_snake_case());
@@ -483,7 +521,18 @@ impl RuntimeGenerator {
                    }
                }

+                #outer_extrinsic
+
+                impl #crate_path::blocks::RootExtrinsic for Call {
+                    fn root_extrinsic(pallet_bytes: &[u8], pallet_name: &str, pallet_ty: u32, metadata: &#crate_path::Metadata) -> Result<Self, #crate_path::Error> {
+                        use #crate_path::metadata::DecodeWithMetadata;
+                        #( #root_extrinsic_if_arms )*
+                        Err(#crate_path::ext::scale_decode::Error::custom(format!("Pallet name '{}' not found in root Call enum", pallet_name)).into())
+                    }
+                }
+
                #outer_error
+
                impl #crate_path::error::RootError for Error {
                    fn root_error(pallet_bytes: &[u8], pallet_name: &str, metadata: &#crate_path::Metadata) -> Result<Self, #crate_path::Error> {
                        use #crate_path::metadata::DecodeWithMetadata;