Use scale-encode and scale-decode to encode and decode based on metadata (#842)

* WIP EncodeAsType and DecodeAsType * remove silly cli experiment code * Get things finally compiling with EncodeAsType and DecodeAsType * update codegen test and WrapperKeepOpaque proper impl (in case it shows up in codegen) * fix tests * accomodate scale-value changes * starting to migrate to EncodeAsType/DecodeAsType * static event decoding and tx encoding to use DecodeAsFields/EncodeAsFields * some tidy up and add decode(skip) attrs where needed * fix root event decoding * #[codec(skip)] will do, and combine map_key stuff into storage_address since it's all specific to that * fmt and clippy * update Cargo.lock * remove patched scale-encode * bump scale-encode to 0.1 and remove unused dep in testing crate * update deps and use released scale-decode * update scale-value to latest to remove git branch * Apply suggestions from code review Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com> * remove sorting in derives/attr generation; spit them out in order given * re-add derive sorting; it's a hashmap * StaticTxPayload and DynamicTxPayload rolled into single Payload struct * StaticStorageAddress and DynamicStorageAddress into single Address struct * Fix storage address byte retrieval * StaticConstantAddress and DynamicConstantAddress => Address * Simplify storage codegen to fix test * Add comments * Alias to RuntimeEvent rather than making another, and prep for substituting call type * remove unnecessary clone * Fix docs and failing UI test * root_bytes -> to_root_bytes * document error case in StorageClient::address_bytes() --------- Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com>
2026-05-06 12:38:04 +00:00 · 2023-03-21 15:31:13 +00:00
parent c9527abaa8
commit c63ff6ec6d
50 changed files with 9965 additions and 6262 deletions
@@ -0,0 +1,51 @@
+// Copyright 2019-2022 Parity Technologies (UK) Ltd.
+// This file is dual-licensed as Apache-2.0 or GPL-3.0.
+// see LICENSE for license details.
+
+use super::Metadata;
+use crate::error::Error;
+
+/// This trait is implemented for all types that also implement [`scale_decode::DecodeAsType`].
+pub trait DecodeWithMetadata: Sized {
+    /// Given some metadata and a type ID, attempt to SCALE decode the provided bytes into `Self`.
+    fn decode_with_metadata(
+        bytes: &mut &[u8],
+        type_id: u32,
+        metadata: &Metadata,
+    ) -> Result<Self, Error>;
+}
+
+impl<T: scale_decode::DecodeAsType> DecodeWithMetadata for T {
+    fn decode_with_metadata(
+        bytes: &mut &[u8],
+        type_id: u32,
+        metadata: &Metadata,
+    ) -> Result<T, Error> {
+        let val = T::decode_as_type(bytes, type_id, metadata.types())?;
+        Ok(val)
+    }
+}
+
+/// This trait is implemented for all types that also implement [`scale_encode::EncodeAsType`].
+pub trait EncodeWithMetadata {
+    /// SCALE encode this type to bytes, possibly with the help of metadata.
+    fn encode_with_metadata(
+        &self,
+        type_id: u32,
+        metadata: &Metadata,
+        bytes: &mut Vec<u8>,
+    ) -> Result<(), Error>;
+}
+
+impl<T: scale_encode::EncodeAsType> EncodeWithMetadata for T {
+    /// SCALE encode this type to bytes, possibly with the help of metadata.
+    fn encode_with_metadata(
+        &self,
+        type_id: u32,
+        metadata: &Metadata,
+        bytes: &mut Vec<u8>,
+    ) -> Result<(), Error> {
+        self.encode_as_type_to(type_id, metadata.types(), bytes)?;
+        Ok(())
+    }
+}