Dynamic fees for bridges-v1 (#2294)

* impl backpressure in the XcmBlobHaulerAdapter

* LocalXcmQueueManager + more adapters

* OnMessageDelviered callback

* forbid mesage delivery transactions when the channel between target bridge hub and target asset hub is suspended

* pallet-xcm-bridge-hub-router

* removed commented code

* improvements and tests for palle-xcm-bridge-router

* use LocalXcmChannel in XcmBlobMessageDispatch

* new tests for logic changes in messages pallet

* tests for LocalXcmQueueSuspender

* tests for LocalXcmQueueMessageProcessor

* tests for new logic in the XcmBlobHaulerAdapter

* fix other tests in the bridge-runtime-common

* extension_reject_call_when_dispatcher_is_inactive

* benchmarks for pallet-xcm-bridge-hub-router

* get rid of redundant storage value

* add new pallet to verify-pallets-build.sh

* fixing spellcheck, clippy and rustdoc

* trigger CI

* Revert "trigger CI"

This reverts commit 48f1ba032334e3c6d8470436483736988aa060ac.

* change log target for xcm bridge router pallet

* Update modules/xcm-bridge-hub-router/src/lib.rs

Co-authored-by: Branislav Kontur <bkontur@gmail.com>

* use saturated_len where possible

* fmt

* (Suggestion) Ability to externalize configuration for `ExporterFor` (#2313)

* Ability to externalize configuration for `ExporterFor`
(Replaced `BridgedNetworkId/SiblingBridgeHubLocation` with `Bridges: ExporterFor`)

* Fix millau

* Compile fix

* Return back `BridgedNetworkId` but as optional filter

* Replaced `BaseFee` with fees from inner `Bridges: ExporterFor`

* typo

* Clippy

* Rename LocalXcmChannel to XcmChannelStatusProvider (#2319)

* Rename LocalXcmChannel to XcmChannelStatusProvider

* fmt

* added/fixed some docs

* Dynamic fees v1: report congestion status to sending chain (#2318)

* report congestion status: changes at the sending chain

* OnMessagesDelivered is back

* report congestion status: changes at the bridge hub

* moer logging

* fix? benchmarks

* spelling

* tests for XcmBlobHaulerAdapter and LocalXcmQueueManager

* tests for messages pallet

* fix typo

* rustdoc

* Update modules/messages/src/lib.rs

* apply review suggestions

* ".git/.scripts/commands/fmt/fmt.sh"

* Added `XcmBridgeHubRouterCall::report_bridge_status` encodings for AHK/P (#2350)

* Added `XcmBridgeHubRouterCall::report_bridge_status` encodings for AHK/P

* Spellcheck

* Added const for `XcmBridgeHubRouterTransactCallMaxWeight`

* Cargo.lock

* Introduced base delivery fee constants

* Congestion messages as Optional to turn on/off `supports_congestion_detection`

* Spellcheck

* Ability to externalize dest for benchmarks

* Ability to externalize dest for benchmarks

---------

Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: command-bot <>

bridges/primitives/xcm-bridge-hub-router/src/lib.rs

@@ -0,0 +1,66 @@
+// Copyright 2019-2021 Parity Technologies (UK) Ltd.
+// This file is part of Parity Bridges Common.
+
+// Parity Bridges Common is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity Bridges Common is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Primitives of the `xcm-bridge-hub-router` pallet.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use codec::{Decode, Encode, MaxEncodedLen};
+use scale_info::TypeInfo;
+use sp_core::H256;
+use sp_runtime::{FixedU128, RuntimeDebug};
+
+/// Minimal delivery fee factor.
+pub const MINIMAL_DELIVERY_FEE_FACTOR: FixedU128 = FixedU128::from_u32(1);
+
+/// XCM channel status provider that may report whether it is congested or not.
+///
+/// By channel we mean the physical channel that is used to deliver messages of one
+/// of the bridge queues.
+pub trait XcmChannelStatusProvider {
+	/// Returns true if the channel is currently congested.
+	fn is_congested() -> bool;
+}
+
+impl XcmChannelStatusProvider for () {
+	fn is_congested() -> bool {
+		false
+	}
+}
+
+/// Current status of the bridge.
+#[derive(Clone, Decode, Encode, Eq, PartialEq, TypeInfo, MaxEncodedLen, RuntimeDebug)]
+pub struct BridgeState {
+	/// Current delivery fee factor.
+	pub delivery_fee_factor: FixedU128,
+	/// Bridge congestion flag.
+	pub is_congested: bool,
+}
+
+impl Default for BridgeState {
+	fn default() -> BridgeState {
+		BridgeState { delivery_fee_factor: MINIMAL_DELIVERY_FEE_FACTOR, is_congested: false }
+	}
+}
+
+/// A minimized version of `pallet-xcm-bridge-hub-router::Call` that can be used without a runtime.
+#[derive(Encode, Decode, Debug, PartialEq, Eq, Clone, TypeInfo)]
+#[allow(non_camel_case_types)]
+pub enum XcmBridgeHubRouterCall {
+	/// `pallet-xcm-bridge-hub-router::Call::report_bridge_status`
+	#[codec(index = 0)]
+	report_bridge_status { bridge_id: H256, is_congested: bool },
+}