Adds transfer token user fee (#7)

* adds transfer token user fee

* updates fee calc

* starts with adding snowbridge conf

* updates fee

* correct ROC amount

* correct ROC amount

---------

Co-authored-by: claravanstaden <Cats 4 life!>

cumulus/parachains/common/src/lib.rs

@@ -19,6 +19,7 @@ pub mod impls;
 pub mod kusama;
 pub mod polkadot;
 pub mod rococo;
+pub mod snowbridge_config;
 pub mod westend;
 pub mod wococo;
 pub mod xcm_config;

cumulus/parachains/common/src/snowbridge_config.rs

@@ -0,0 +1,6 @@
+frame_support::parameter_types! {
+	/// User fee for ERC20 token transfer back to Ethereum.
+	/// (initially was calculated by test `OutboundQueue::calculate_fees` - ETH/ROC 1/400 and fee_per_gas 15 GWEI = 22698000000 + *25%)
+	/// Needs to be more than fee calculated from DefaultFeeConfig FeeConfigRecord in snowbridge:parachain/pallets/outbound-queue/src/lib.rs
+	pub const BridgeHubEthereumBaseFeeInRocs: u128 = 28372500000;
+}

cumulus/parachains/runtimes/assets/asset-hub-rococo/src/xcm_config.rs

@@ -32,6 +32,7 @@ use frame_system::EnsureRoot;
 use pallet_xcm::XcmPassthrough;
 use parachains_common::{
 	impls::ToStakingPot,
+	snowbridge_config::BridgeHubEthereumBaseFeeInRocs,
 	xcm_config::{
 		AssetFeeAsExistentialDepositMultiplier, ConcreteAssetFromSystem,
 		RelayOrOtherSystemParachains,
@@ -910,8 +911,8 @@ pub mod bridging {
 					SiblingBridgeHub::get(),
 					Some((
 						XcmBridgeHubRouterFeeAssetId::get(),
-						bp_asset_hub_rococo::BridgeHubRococoBaseFeeInRocs::get(),
-					).into()) // TODO calculate fee factor
+						BridgeHubEthereumBaseFeeInRocs::get(),
+					).into())
 				),
 			];
 

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-rococo/src/xcm_config.rs

@@ -237,9 +237,9 @@ impl Contains<RuntimeCall> for SafeCallFilter {
 					snowbridge_ethereum_beacon_client::Call::force_checkpoint { .. } |
 						snowbridge_ethereum_beacon_client::Call::set_operating_mode { .. },
 				) | RuntimeCall::EthereumInboundQueue(
-					snowbridge_inbound_queue::Call::set_operating_mode { .. },
+				snowbridge_inbound_queue::Call::set_operating_mode { .. },
 			) | RuntimeCall::EthereumOutboundQueue(
-					snowbridge_outbound_queue::Call::set_operating_mode { .. },
+				snowbridge_outbound_queue::Call::set_operating_mode { .. },
 			) | RuntimeCall::EthereumControl(..)
 		)
 	}