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Introduce XcmFeesToAccount fee manager (#1234)

Browse Source 
Combination of paritytech/polkadot#7005, its addon PR
paritytech/polkadot#7585 and its companion paritytech/cumulus#2433.

This PR introduces a new XcmFeesToAccount struct which implements the
`FeeManager` trait, and assigns this struct as the `FeeManager` in the
XCM config for all runtimes.

The struct simply deposits all fees handled by the XCM executor to a
specified account. In all runtimes, the specified account is configured
as the treasury account.

XCM __delivery__ fees are now being introduced (unless the root origin
is sending a message to a system parachain on behalf of the originating
chain).

# Note for reviewers

Most file changes are tests that had to be modified to account for the
new fees.
Main changes are in:
- cumulus/pallets/xcmp-queue/src/lib.rs <- To make it track the delivery
fees exponential factor
- polkadot/xcm/xcm-builder/src/fee_handling.rs <- Added. Has the
FeeManager implementation
- All runtime xcm_config files <- To add the FeeManager to the XCM
configuration

# Important note

After this change, instructions that create and send a new XCM (Query*,
Report*, ExportMessage, InitiateReserveWithdraw, InitiateTeleport,
DepositReserveAsset, TransferReserveAsset, LockAsset and RequestUnlock)
will require the corresponding origin account in the origin register to
pay for transport delivery fees, and the onward message will fail to be
sent if the origin account does not have the required amount. This
delivery fee is on top of what we already collect as tx fees in
pallet-xcm and XCM BuyExecution fees!

Wallet UIs that want to expose the new delivery fee can do so using the
formula:

```
delivery_fee_factor * (base_fee + encoded_msg_len * per_byte_fee)
```

where the delivery fee factor can be obtained from the corresponding
pallet based on which transport you are using (UMP, HRMP or bridges),
the base fee is a constant, the encoded message length from the message
itself and the per byte fee is the same as the configured per byte fee
for txs (i.e. `TransactionByteFee`).

---------

Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
Co-authored-by: Giles Cope <gilescope@gmail.com>
Co-authored-by: command-bot <>
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>
Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
This commit is contained in:
Keith Yeung
2023-10-18 23:22:25 +08:00
committed by GitHub
parent 1cf7d3aafa
commit 3dece311be
99 changed files with 2229 additions and 468 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cumulus/parachains/integration-tests/emulated/assets/asset-hub-rococo/Cargo.toml
+5
View File
@@ -25,8 +25,11 @@ polkadot-parachain-primitives = { path = "../../../../../../polkadot/parachain",
polkadot-runtime-parachains = { path = "../../../../../../polkadot/runtime/parachains" }
xcm = { package = "staging-xcm", path = "../../../../../../polkadot/xcm", default-features = false}
pallet-xcm = { path = "../../../../../../polkadot/xcm/pallet-xcm", default-features = false}
xcm-executor = { package = "staging-xcm-executor", path = "../../../../../../polkadot/xcm/xcm-executor", default-features = false}
rococo-runtime = { path = "../../../../../../polkadot/runtime/rococo", default-features = false }
# Cumulus
asset-test-utils = { path = "../../../../runtimes/assets/test-utils", default-features = false }
parachains-common = { path = "../../../../common" }
asset-hub-rococo-runtime = { path = "../../../../runtimes/assets/asset-hub-rococo" }
@@ -47,5 +50,7 @@ runtime-benchmarks = [
"parachains-common/runtime-benchmarks",
"polkadot-parachain-primitives/runtime-benchmarks",
"polkadot-runtime-parachains/runtime-benchmarks",
"rococo-runtime/runtime-benchmarks",
"sp-runtime/runtime-benchmarks",
"xcm-executor/runtime-benchmarks",
]
cumulus/parachains/integration-tests/emulated/assets/asset-hub-rococo/src/lib.rs
+1
View File
@@ -13,6 +13,7 @@
// See the License for the specific language governing permissions and
// limitations under the License.
pub use asset_test_utils::xcm_helpers;
pub use codec::Encode;
pub use frame_support::{
assert_err, assert_ok,
cumulus/parachains/integration-tests/emulated/assets/asset-hub-rococo/src/tests/reserve_transfer.rs
+30 -4
View File
@@ -14,6 +14,8 @@
// limitations under the License.
use crate::*;
use asset_hub_rococo_runtime::xcm_config::XcmConfig as AssetHubRococoXcmConfig;
use rococo_runtime::xcm_config::XcmConfig as RococoXcmConfig;
fn relay_origin_assertions(t: RelayToSystemParaTest) {
type RuntimeEvent = <Rococo as Chain>::RuntimeEvent;
@@ -182,10 +184,16 @@ fn limited_reserve_transfer_native_asset_from_relay_to_system_para_fails() {
test.set_dispatchable::<Rococo>(relay_limited_reserve_transfer_assets);
test.assert();
let delivery_fees = Rococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<RococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
assert_eq!(receiver_balance_before, receiver_balance_after);
}
@@ -244,7 +252,13 @@ fn reserve_transfer_native_asset_from_relay_to_system_para_fails() {
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
let delivery_fees = Rococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<RococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
assert_eq!(receiver_balance_before, receiver_balance_after);
}
@@ -306,7 +320,13 @@ fn limited_reserve_transfer_native_asset_from_system_para_to_para() {
let sender_balance_after = test.sender.balance;
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
let delivery_fees = AssetHubRococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubRococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// TODO: Check receiver balance when Penpal runtime is improved to propery handle reserve
// transfers
}
@@ -338,7 +358,13 @@ fn reserve_transfer_native_asset_from_system_para_to_para() {
let sender_balance_after = test.sender.balance;
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
let delivery_fees = AssetHubRococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubRococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// TODO: Check receiver balance when Penpal runtime is improved to propery handle reserve
// transfers
}
cumulus/parachains/integration-tests/emulated/assets/asset-hub-rococo/src/tests/teleport.rs
+48 -9
View File
@@ -14,6 +14,8 @@
// limitations under the License.
use crate::*;
use asset_hub_rococo_runtime::xcm_config::XcmConfig as AssetHubRococoXcmConfig;
use rococo_runtime::xcm_config::XcmConfig as RococoXcmConfig;
fn relay_origin_assertions(t: RelayToSystemParaTest) {
type RuntimeEvent = <Rococo as Chain>::RuntimeEvent;
@@ -171,11 +173,17 @@ fn limited_teleport_native_assets_from_relay_to_system_para_works() {
test.set_dispatchable::<Rococo>(relay_limited_teleport_assets);
test.assert();
let delivery_fees = Rococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<RococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance is increased
assert!(receiver_balance_after > receiver_balance_before);
}
@@ -212,8 +220,14 @@ fn limited_teleport_native_assets_back_from_system_para_to_relay_works() {
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
let delivery_fees = AssetHubRococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubRococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance is increased
assert!(receiver_balance_after > receiver_balance_before);
}
@@ -247,8 +261,14 @@ fn limited_teleport_native_assets_from_system_para_to_relay_fails() {
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
let delivery_fees = AssetHubRococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubRococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance does not change
assert_eq!(receiver_balance_after, receiver_balance_before);
}
@@ -274,11 +294,17 @@ fn teleport_native_assets_from_relay_to_system_para_works() {
test.set_dispatchable::<Rococo>(relay_teleport_assets);
test.assert();
let delivery_fees = Rococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<RococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance is increased
assert!(receiver_balance_after > receiver_balance_before);
}
@@ -315,8 +341,14 @@ fn teleport_native_assets_back_from_system_para_to_relay_works() {
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
let delivery_fees = AssetHubRococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubRococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance is increased
assert!(receiver_balance_after > receiver_balance_before);
}
@@ -347,11 +379,17 @@ fn teleport_native_assets_from_system_para_to_relay_fails() {
test.set_dispatchable::<AssetHubRococo>(system_para_teleport_assets);
test.assert();
let delivery_fees = AssetHubRococo::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubRococoXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance does not change
assert_eq!(receiver_balance_after, receiver_balance_before);
}
@@ -359,11 +397,12 @@ fn teleport_native_assets_from_system_para_to_relay_fails() {
#[test]
fn teleport_to_other_system_parachains_works() {
let amount = ASSET_HUB_ROCOCO_ED * 100;
let native_asset: VersionedMultiAssets = (Parent, amount).into();
let native_asset: MultiAssets = (Parent, amount).into();
test_parachain_is_trusted_teleporter!(
AssetHubRococo, // Origin
vec![BridgeHubRococo], // Destinations
AssetHubRococo, // Origin
AssetHubRococoXcmConfig, // XCM Configuration
vec![BridgeHubRococo], // Destinations
(native_asset, amount)
);
}
cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/Cargo.toml
+4
View File
@@ -30,10 +30,13 @@ xcm = { package = "staging-xcm", path = "../../../../../../polkadot/xcm", defaul
xcm-builder = { package = "staging-xcm-builder", path = "../../../../../../polkadot/xcm/xcm-builder", default-features = false}
xcm-executor = { package = "staging-xcm-executor", path = "../../../../../../polkadot/xcm/xcm-executor", default-features = false}
pallet-xcm = { path = "../../../../../../polkadot/xcm/pallet-xcm", default-features = false}
westend-runtime = { path = "../../../../../../polkadot/runtime/westend", default-features = false }
westend-runtime-constants = { path = "../../../../../../polkadot/runtime/westend/constants", default-features = false }
# Cumulus
parachains-common = { path = "../../../../common" }
asset-hub-westend-runtime = { path = "../../../../runtimes/assets/asset-hub-westend" }
asset-test-utils = { path = "../../../../runtimes/assets/test-utils", default-features = false }
cumulus-pallet-dmp-queue = { default-features = false, path = "../../../../../pallets/dmp-queue" }
cumulus-pallet-parachain-system = { default-features = false, path = "../../../../../pallets/parachain-system" }
@@ -59,6 +62,7 @@ runtime-benchmarks = [
"polkadot-runtime-common/runtime-benchmarks",
"polkadot-runtime-parachains/runtime-benchmarks",
"sp-runtime/runtime-benchmarks",
"westend-runtime/runtime-benchmarks",
"xcm-builder/runtime-benchmarks",
"xcm-executor/runtime-benchmarks",
]
cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/src/lib.rs
+1
View File
@@ -13,6 +13,7 @@
// See the License for the specific language governing permissions and
// limitations under the License.
pub use asset_test_utils::xcm_helpers;
pub use codec::Encode;
pub use frame_support::{
assert_err, assert_ok,
cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/src/tests/reserve_transfer.rs
+38 -4
View File
@@ -14,6 +14,8 @@
// limitations under the License.
use crate::*;
use asset_hub_westend_runtime::xcm_config::XcmConfig;
use westend_runtime::xcm_config::XcmConfig as WestendXcmConfig;
fn relay_origin_assertions(t: RelayToSystemParaTest) {
type RuntimeEvent = <Westend as Chain>::RuntimeEvent;
@@ -179,10 +181,16 @@ fn limited_reserve_transfer_native_asset_from_relay_to_system_para_fails() {
test.set_dispatchable::<Westend>(relay_limited_reserve_transfer_assets);
test.assert();
let delivery_fees = Westend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<WestendXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
assert_eq!(receiver_balance_before, receiver_balance_after);
}
@@ -238,10 +246,16 @@ fn reserve_transfer_native_asset_from_relay_to_system_para_fails() {
test.set_dispatchable::<Westend>(relay_reserve_transfer_assets);
test.assert();
let delivery_fees = Westend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<WestendXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
assert_eq!(receiver_balance_before, receiver_balance_after);
}
@@ -303,7 +317,17 @@ fn limited_reserve_transfer_native_asset_from_system_para_to_para() {
let sender_balance_after = test.sender.balance;
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
let delivery_fees = AssetHubWestend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<<XcmConfig as xcm_executor::Config>::XcmSender>(
test.args.assets.clone(),
0,
test.args.weight_limit,
test.args.beneficiary,
test.args.dest,
)
});
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// TODO: Check receiver balance when Penpal runtime is improved to propery handle reserve
// transfers
}
@@ -335,7 +359,17 @@ fn reserve_transfer_native_asset_from_system_para_to_para() {
let sender_balance_after = test.sender.balance;
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
let delivery_fees = AssetHubWestend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<<XcmConfig as xcm_executor::Config>::XcmSender>(
test.args.assets.clone(),
0,
test.args.weight_limit,
test.args.beneficiary,
test.args.dest,
)
});
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// TODO: Check receiver balance when Penpal runtime is improved to propery handle reserve
// transfers
}
cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/src/tests/teleport.rs
+44 -6
View File
@@ -16,6 +16,8 @@
#![allow(dead_code)] // <https://github.com/paritytech/cumulus/issues/3027>
use crate::*;
use asset_hub_westend_runtime::xcm_config::XcmConfig as AssetHubWestendXcmConfig;
use westend_runtime::xcm_config::XcmConfig as WestendXcmConfig;
fn relay_origin_assertions(t: RelayToSystemParaTest) {
type RuntimeEvent = <Westend as Chain>::RuntimeEvent;
@@ -173,11 +175,17 @@ fn limited_teleport_native_assets_from_relay_to_system_para_works() {
test.set_dispatchable::<Westend>(relay_limited_teleport_assets);
test.assert();
let delivery_fees = Westend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<WestendXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance is increased
assert!(receiver_balance_after > receiver_balance_before);
}
@@ -214,8 +222,14 @@ fn limited_teleport_native_assets_back_from_system_para_to_relay_works() {
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
let delivery_fees = AssetHubWestend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubWestendXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance is increased
assert!(receiver_balance_after > receiver_balance_before);
}
@@ -249,8 +263,14 @@ fn limited_teleport_native_assets_from_system_para_to_relay_fails() {
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
let delivery_fees = AssetHubWestend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubWestendXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance does not change
assert_eq!(receiver_balance_after, receiver_balance_before);
}
@@ -276,11 +296,17 @@ fn teleport_native_assets_from_relay_to_system_para_works() {
test.set_dispatchable::<Westend>(relay_teleport_assets);
test.assert();
let delivery_fees = Westend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<WestendXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance is increased
assert!(receiver_balance_after > receiver_balance_before);
}
@@ -314,11 +340,17 @@ fn teleport_native_assets_back_from_system_para_to_relay_works() {
test.set_dispatchable::<AssetHubWestend>(system_para_teleport_assets);
test.assert();
let delivery_fees = AssetHubWestend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubWestendXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance is increased
assert!(receiver_balance_after > receiver_balance_before);
}
@@ -349,11 +381,17 @@ fn teleport_native_assets_from_system_para_to_relay_fails() {
test.set_dispatchable::<AssetHubWestend>(system_para_teleport_assets);
test.assert();
let delivery_fees = AssetHubWestend::execute_with(|| {
xcm_helpers::transfer_assets_delivery_fees::<
<AssetHubWestendXcmConfig as xcm_executor::Config>::XcmSender,
>(test.args.assets.clone(), 0, test.args.weight_limit, test.args.beneficiary, test.args.dest)
});
let sender_balance_after = test.sender.balance;
let receiver_balance_after = test.receiver.balance;
// Sender's balance is reduced
assert_eq!(sender_balance_before - amount_to_send, sender_balance_after);
assert_eq!(sender_balance_before - amount_to_send - delivery_fees, sender_balance_after);
// Receiver's balance does not change
assert_eq!(receiver_balance_after, receiver_balance_before);
}