* XCM: Automatic Version Negotiation

* Introduce the version instructions and subscription trait

* Notification and subscription data migration

* Version change subscriptions

* Fixes

* Formatting

* Spelling

* Fixes

* Fixes

* Automatic unsubscription

* Formatting

* Expose remote origin in VM and ensure it is unchanged from actual origin in subscription instructions.

* Barrier

* Unsubscription extrinsic

* Remove top_level param

* Formatting

* Fixes

* Automatic subscription

* Formatting

* Spelling

* Unit tests for XCM executor

* Formatting

* Spellin

* Unit test for XCM pallet subscriber side

* Formatting

* More tests

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* Fixes

* Subscription-side tests

* Formatting

* Unit tests for XCM pallet

* Formatting

* Update roadmap/implementers-guide/src/types/overseer-protocol.md

Co-authored-by: Shawn Tabrizi <[email protected]>

* Remove commented code

* Grumbles

* Multi-stage XCM version migration

* Formatting

* v1 subscriptions backport

* Warning

* Spelling

* Fix grumbles

* Formatting

* Avoid running through old notifications

* Formatting

Co-authored-by: Shawn Tabrizi <[email protected]>

* XCM: Introduce AssetTrap

* Revert reversions

* Remove attempts at weighing and add test

* Less storage use for asset trapping

* Add missing file

* Fixes

* Fixes

* Formatting

* Fixes

* Docs

* Filter types to allow runtimes to dictate which assets/origins should be trapped

* Formatting

* Tests

* Formatting

* Fixes

* Docs

* Intoduce XCM v2

Also some minor fix for v0/v1

* Minor version cleanup

* Minor version cleanup

* Introduce SendError for XcmSend trait to avoid cycles with having Outcome in Xcm

* comment

* Corrent type

* Docs

* Fix build

* Fixes

* Introduce the basic impl

* Docs

* Add function

* Basic implementation

* Weighed responses and on_report

* Make XCM more script-like

* Remove BuyExecution::orders

* Fixes

* Fixes

* Fixes

* Formatting

* Initial draft and make pallet-xcm build

* fix XCM tests

* Formatting

* Fixes

* Formatting

* spelling

* Fixes

* Fixes

* spelling

* tests for translation

* extra fields to XCM pallet

* Formatting

* Fixes

* spelling

* first integration test

* Another integration test

* Formatting

* fix tests

* all tests

* Fixes

* Fixes

* Formatting

* Fixes

* Fixes

* Formatting

* Bump

* Remove unneeded structuring

* add instruction

* Fixes

* spelling

* Fixes

* Fixes

* Formatting

* Fixes

* Fixes

* Formatting

* Introduce and use VersionedResponse

* Introduce versioning to dispatchables' params

* Fixes

* Formatting

* Rest of merge

* more work

* Formatting

* Basic logic

* Fixes

* Fixes

* Add test

* Fixes

* Formatting

* Fixes

* Fixes

* Fixes

* Nits

* Simplify

* Spelling

* Formatting

* Return weight of unexecuted instructions in case of error as surplus

* Formatting

* Fixes

* Test for instruction count limiting

* Formatting

* Docs

* replace `()` filter with `Nothing`

* import nothing

* add nothing

* update Substrate

Co-authored-by: parity-processbot <>

* add integration tests to xcm-builder

* add an integration test for reserve_transfer_assets

* add query holding and teleport tests

* formatting

* add to barrier doc comments and fix doc tests warnings

* use more realistic barrier for integration tests

* improve imports

* adjust base xcm weight and existential deposit to be in line with Kusama

* remove AnyNetwork

Co-authored-by: Amar Singh <[email protected]>

* add more comments and remove unnecessary code

* move mock into separate file

* reduce imports

* update cargo.lock

* remove reserve transfer test from xcm builder integration tests

* reword barrier doc comment

* elaborate on QueryHolding test scenario

* add an integration test for reserve based transfers from parachain to parachain

* add teleport tests

* fix failing teleport filter tests

* Update xcm/xcm-builder/src/integration_tests.rs

Co-authored-by: Kian Paimani <[email protected]>

* Update xcm/xcm-builder/src/integration_tests.rs

Co-authored-by: Kian Paimani <[email protected]>

* Update xcm/xcm-builder/src/integration_tests.rs

Co-authored-by: Kian Paimani <[email protected]>

* Move integration tests to tests/ directory

* Fix merge

* Replace All wildcard with a concrete seed amount

* Rename SEED_AMOUNT to REGISTER_AMOUNT

* Fix compilation error

* Check for teleport destination first before checking out assets

* Fix unit test

* Do not run tests in integration mock

* Add a permissive assets filter for teleportation

* Remove check for teleport location in InitiateTeleport XCM

* Remove defunct test

* Apply suggestions from code review

Co-authored-by: Kian Paimani <[email protected]>

* Reword comment

Co-authored-by: Amar Singh <[email protected]>
Co-authored-by: Kian Paimani <[email protected]>
Co-authored-by: Keith Yeung <[email protected]>