Cross-contract calling: simple debugger (#14678)

* Provide basic breakpoints

* Rename to Observer

* Rename feature. Single trait. Borrow-checker

* : frame_system::Config

* Confused type name

* Minor bugs

* pub trait

* No unnecessary cloning

* Make node compile with all features

* Move everything debug-related to a single module

* Add docs and implementation for ()

* fmt

* Make it feature-gated or for tests

* Prepare testing kit

* Testcase

* Fmt

* Use feature in dev-deps

* ?

* feature propagation

* AAAA

* lol, that doesn't make much sense to me

* Turn on

* clippy

* Remove self dep

* fmt, feature-gating test

* Noop to trigger CI

* idk

* add feature to pipeline

* Corrupt test to see if it is actually being run

* Revert change

* Doc for conf type

* Review

* Imports

* ...

* Remove debug for kitchen-sink

* Move test

* Fix imports

* I must have already tried this one...

substrate/frame/contracts/src/lib.rs

@@ -97,6 +97,7 @@ mod wasm;
 
 pub mod chain_extension;
 pub mod migration;
+pub mod unsafe_debug;
 pub mod weights;
 
 #[cfg(test)]
@@ -351,6 +352,14 @@ pub mod pallet {
 		/// type Migrations = (v10::Migration<Runtime, Currency>,);
 		/// ```
 		type Migrations: MigrateSequence;
+
+		/// Type that provides debug handling for the contract execution process.
+		///
+		/// # Warning
+		///
+		/// Do **not** use it in a production environment or for benchmarking purposes.
+		#[cfg(feature = "unsafe-debug")]
+		type Debug: unsafe_debug::UnsafeDebug<Self>;
 	}
 
 	#[pallet::hooks]