Metadata V15: Enrich extrinsic type info for decoding (#14123)

* metadata-ir: Add extrinsic type info to decode address, call, sig

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

* frame-metadata: Point to unreleased branch

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

* metadata-ir: Include addrees, call, signature in V15 conversion

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

* metadata-ir: Include extra ty

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

* construct_runtime: Extract address,call,sig,extra ty from tx type

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

* frame/tests: Check metadata populates xt types correctly

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

* metadata-ir/tests: Add extra fields on ExtrinsicMetadataIR

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

* primitives/traits: Expand the `Extrinsic::SignaturePayload`

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

* primitives: Adjust to new `Extrinsic` associated types

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

* frame/metadata: Simplify metadata generation

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

* frame/example: Adjust to new interface

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

* frame/tests: Adjust `extrinsic_metadata_ir_types`

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

* Revert the additional Extrinsic' associated types

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

* primitives: Add `SignaturePayload` marker trait

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

* primitives: Implement SignaturePayload for empty tuple

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

* Adjust to new SignaturePayload trait

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

* tests: Adjust `extrinsic_metadata_ir_types` to new interface

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

* frame/support: Adjust pallet test

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

* frame: Add Extrinsic length prefix to the metadata

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

* primitives: Populate `ExtrinsicMetadataIR` with `len_ty`

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

* Update primitives/runtime/src/traits.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* Apply cargo fmt

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

* v15: Remove len type of the extrinsic

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

* cargo: Update frame-metadata

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

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: parity-processbot <>

substrate/frame/support/src/traits/misc.rs

@@ -893,7 +893,8 @@ pub trait ExtrinsicCall: sp_runtime::traits::Extrinsic {
 #[cfg(feature = "std")]
 impl<Call, Extra> ExtrinsicCall for sp_runtime::testing::TestXt<Call, Extra>
 where
-	Call: codec::Codec + Sync + Send,
+	Call: codec::Codec + Sync + Send + TypeInfo,
+	Extra: TypeInfo,
 {
 	fn call(&self) -> &Self::Call {
 		&self.call
@@ -903,7 +904,10 @@ where
 impl<Address, Call, Signature, Extra> ExtrinsicCall
 	for sp_runtime::generic::UncheckedExtrinsic<Address, Call, Signature, Extra>
 where
-	Extra: sp_runtime::traits::SignedExtension,
+	Address: TypeInfo,
+	Call: TypeInfo,
+	Signature: TypeInfo,
+	Extra: sp_runtime::traits::SignedExtension + TypeInfo,
 {
 	fn call(&self) -> &Self::Call {
 		&self.function