Pallet: Atomic Swap (#6349)

* Init atomic swap pallet

* Implement module swap operations

* Add successful swap test

* Bump node spec_version

* Fix storage name

* Add ProofLimit parameter to prevent proof size being too large

* Add missing events

* Basic weight support

* Add basic docs

* Mark swap on claim

This handles the additional case if `repatriate_reserved` fails.

* Add additional expire handler

* Update frame/atomic-swap/src/lib.rs

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

* Add docs on ProofLimit

* Fix test

* Return Ok(()) even when the transfer fails

Because we need to mark the swap as claimed no matter what.

* Remove retry logic

It's overkill. Swap is about something being executed, not necessarily successful.
Although there should be logic (reserve and unreserve) to make it so that both parties *believes*
that the execution is successful.

* succeed -> succeeded

* Add docs on duration -- revealer should use duration shorter than counterparty

* Missing trait type

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

substrate/bin/node/runtime/src/lib.rs

@@ -97,8 +97,8 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to 0. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 252,
-	impl_version: 1,
+	spec_version: 253,
+	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,
 };