greedy relayer don't need message dispatch to be prepaid if dispatch is supposed to be paid at the target chain (#1016)

* introduce relayer mode enum

* removed MaximalReward mode

* TODO

* Saturating -> SaturatingAdd

* ref issue in TODOs

* Update relays/messages/src/message_race_delivery.rs

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

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

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

* always run on-demand headers relay in complex relay

* fix compilation

* prefix in relay loops logs

* fmt

* complex headers+messages relay

* post-merge fix

* fix + test issue with on-demand not starting

* use Substrate state_getReadProof method instead of pallet-bridge-messages-rpc

* Fix typo

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

* Update copyright date to 2021

* Bump date in license header template

* on-demand headers relay

* bool::then

* move file

* atomic submit_signed_extrinsic

* remove cli options from future

* test on-demand relay

* TODOs

* fixed initialization call for Westend -> Millau

* Update relays/client-substrate/src/client.rs

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

* removed on_demand_headers_relay.rs

* on_demand_headers_relay traces

* fix compilation

* fmt

* docs

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

* Remove chains.

* Move relay clients.

* Flatten generic.

* Fix fmt.

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

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

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

* fix broken message lane benchmarks

* proof-size related benchmarks

* impl Size for proof parameters

* include proof weight into weight formula

* left TODO

* fixed proof size

* WeightInfoExt::receive_messages_proof_weight

* charge for extra message bytes delivery in send_message

* removed default impl of WeightsInfoExt

* moved weight formulas to WeightInfoExt

* receive_messages_proof_outbound_lane_state_overhead is included twice in weight

* typo

* typo

* fixed TODO

* more asserts

* started wotk on message-lane documentation

* expected_extra_storage_proof_size() is actually expected in delivery confirmation tx

* update README.md

* ensure_able_to_receive_confirmation

* test rialto message lane weights

* removed TODO

* removed unnecessary trait requirements

* fixed arguments

* fix compilation

* decreased basic delivery tx weight

* fmt

* clippy

* Update modules/message-lane/src/benchmarking.rs

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

* structs

* Update primitives/millau/src/lib.rs

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

* removed readme.md

* removed obsolete trait bounds

* Revert "removed readme.md"

This reverts commit 50b7376a

.

* Update bin/runtime-common/src/messages.rs

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

* Update bin/runtime-common/src/messages.rs

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

* Update bin/runtime-common/src/messages.rs

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

* Update bin/runtime-common/src/messages.rs

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

* Update bin/runtime-common/src/messages.rs

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

* Update bin/runtime-common/src/messages.rs

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

* Update bin/runtime-common/src/messages.rs

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

* PreComputedSize

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

* extract common parts of relay loops: begin

* merge client impls

* backoff in exchange loop

* reconnect without clone

* limit messages size in delivery transaction

* docs

* fixed missing else

* really wake up when retry timeout is completed

* do not query weights if target nonce is unknown

* fix compilation

* replace generic message lane APIs with chain-specific

* moved SubstrateHeadersSyncPipeline to headers_pipeline.rs

* substrate-specific message lane trait

* Update relays/substrate/src/messages_lane.rs

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

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

* use best block state to craft message relay transactions

* removed obsolete TODO

* Update relays/messages-relay/src/message_race_loop.rs

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

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

* limit messages in the batch by weight/count

* fixed components compilation

* reverted obsolete parts of #469

* implement generated_messages_weights

* actually use computed weight in message proof

* fmt and clippy

* fixed TODO

* clippy

* Update relays/messages-relay/src/message_race_loop.rs

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

* add issue reference

* add assert message

* grumbles

* fmt

* reexport weight from bp-message-lane

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

* Millau messages -> Rialto relay

* prepare for custom race strategy of delivery race

* custom strategy for delivery race

* update TODOs

* add reference to issue 457

* impl reconnect

* clippy

* fix check in test

* fmt

* removed obsolete TODO

* fixed another TODOs

* fmt

* use MAX_UNCONFIRMED_MESSAGES_AT_INBOUND_LANE const from primitives

* Update relays/messages-relay/src/message_lane_loop.rs

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

* added SubstrateMessagesProof typedef

* fix test

* removed comment

* additional_proof_required -> ProofParameters

* typo

* multiline literal

* clippy

* fix typo

* and_then -> await

* update_source_latest_confirmed_nonce

* Update relays/messages-relay/src/message_race_delivery.rs

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

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