Asset Conversion release to westmint (#2148)

* Dex and payment by dex in westmint

* Wrap U256 type for now

(to support required traits.)

* cargo fmt

* We can now use U256

* Rename PromotedBalance

* name change

* Updating the code to master.

TODO: handle dust!

* cargo fmt

* Minimising changes and step towards getting benchmarks compiling

(still a From<u32> bound in the pallet)

* minimise diff

* Update parachains/runtimes/assets/westmint/src/lib.rs

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

* Update parachains/runtimes/assets/westmint/src/lib.rs

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

* Update parachains/common/src/impls.rs

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

* Fix benchmark build

* Add in AssetConversionAPI

* Handle dust

* cargo fmt

* Don't need to be explicit that it's AccountId32

* remove pool setup fee

(Asset deposit fees are a sufficient anti-spam measure)

* More natural way to specify native

* cargo fmt

* Update parachains/runtimes/assets/westmint/src/lib.rs

* Additional required impls

* either form of multilocation should be acceptable.

* add call filter exclusion

* Fix typo & try_convert now fails if native is converted

* merge master fixup

* Fix: HoldReason should be there.

* Box MultiAssetId

Otherwise it blows out the Call enum memory size.

* cargo fmt

* update lock file

* add std feature, update lock file

* need to turn on std on common

* adding in westmint tests

* WeightToFee must be from the destination chain.

* cargo fmt

* account for higher ED on westmint

* type removed as not used

* cargo fmt

* remove unused import

* minimising diff

* import needed only with feature enabled

* use multilocation contains

* move the impls to separate file

* simplify on conversion

* simplify on reverse conversion also.

* rename var

* clippy

* removed dead code

* cargo fmt

* Use pay by swap

* review suggestions

* cargo fmt

* Update parachains/runtimes/assets/asset-hub-westend/src/lib.rs

Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>

* add benchmarks for new assets pallet

* revert common/src changes

* need a concrete id

* more fixes

* lock

---------

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>
Co-authored-by: joepetrowski <joe@parity.io>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>

cumulus/parachains/runtimes/assets/common/src/lib.rs

@@ -17,6 +17,7 @@
 
 pub mod foreign_creators;
 pub mod fungible_conversion;
+pub mod local_and_foreign_assets;
 pub mod matching;
 pub mod runtime_api;
 
@@ -76,6 +77,20 @@ pub type ForeignAssetsConvertedConcreteId<AdditionalMultiLocationExclusionFilter
 		Balance,
 	>;
 
+type AssetIdForPoolAssets = u32;
+/// `MultiLocation` vs `AssetIdForPoolAssets` converter for `PoolAssets`.
+pub type AssetIdForPoolAssetsConvert<PoolAssetsPalletLocation> =
+	AsPrefixedGeneralIndex<PoolAssetsPalletLocation, AssetIdForPoolAssets, JustTry>;
+/// [`MatchedConvertedConcreteId`] converter dedicated for `PoolAssets`
+pub type PoolAssetsConvertedConcreteId<PoolAssetsPalletLocation, Balance> =
+	MatchedConvertedConcreteId<
+		AssetIdForPoolAssets,
+		Balance,
+		StartsWith<PoolAssetsPalletLocation>,
+		AssetIdForPoolAssetsConvert<PoolAssetsPalletLocation>,
+		JustTry,
+	>;
+
 #[cfg(test)]
 mod tests {
 	use super::*;