* relay dispatch result flags back to the source chain

* OnMessagesDelivered callback

* add lane id to OnDeliveredMessages callback

* fix benchmarks && upate weights

* clippy

* clippy

* clipy another try

* OnMessagesDelivered -> OnDeliveryConfirmed

* Update primitives/messages/src/source_chain.rs

Co-authored-by: Tomasz Drwięga <[email protected]>

Co-authored-by: Tomasz Drwięga <[email protected]>

* pay dispatch fee at target chain

* refund unspent dispatch weight to messages relayer

* test that transfer actually happens

* pay-at-target-cchain benchmarks + fix previous benchmarks (invalid signature)

* include/exclude pay-dispatch-fee weight from delivery_and_dispatch_fee/delivery tx cost

* remvoe some redundant traces

* enum DispatchFeePayment {}

* typo

* update docs

* (revert removal of valid check)

* Update modules/messages/src/benchmarking.rs

Co-authored-by: Tomasz Drwięga <[email protected]>

* Update modules/messages/src/benchmarking.rs

Co-authored-by: Tomasz Drwięga <[email protected]>

* Update modules/messages/src/benchmarking.rs

Co-authored-by: Tomasz Drwięga <[email protected]>

* Update modules/messages/src/benchmarking.rs

Co-authored-by: Tomasz Drwięga <[email protected]>

Co-authored-by: Tomasz Drwięga <[email protected]>
Co-authored-by: Tomasz Drwięga <[email protected]>

Co-authored-by: Tomasz Drwięga <[email protected]>

* flag for rejecting all outbound messages

* update weights

* Revert "update weights"

This reverts commit 992b866e.

* Revert "flag for rejecting all outbound messages"

This reverts commit d094964b

.

* OperatingMode

* Update modules/messages/src/lib.rs

Co-authored-by: Hernando Castano <[email protected]>

* Poke CI

* RustFmt

Co-authored-by: Hernando Castano <[email protected]>
Co-authored-by: Hernando Castano <[email protected]>

* Update copyright date to 2021

* Bump date in license header template

* use runtime:: prefix for message-lane pallet traces

* renamed message-lane (module and primitives) folder into messages

* replace "message lane" with "messages" where appropriate