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Get dispatch weight from the target chain (when DispatchFeePayment::AtTargetChain is used) (#1430)

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* reintroduce From<SourceChain>InboundLaneApi

* impl From<Chain>InboundLaneApi for testnet runtimes

* use inboundlaneapi in relay

* remove unused OutboundXcmWeigher

* spelling

* added the only test to messages pallet

* fmt
This commit is contained in:
Svyatoslav Nikolsky
2022-06-01 13:00:59 +03:00
committed by Bastian Köcher
parent 78a43c561a
commit f0d05de080
25 changed files with 411 additions and 89 deletions
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bridges/bin/runtime-common/src/messages_api.rs
+27 -41
View File
@@ -16,68 +16,54 @@
//! Helpers for implementing various message-related runtime API mthods.
use crate::messages::{target::FromBridgedChainMessagePayload, MessageBridge};
use bp_messages::{LaneId, MessageDetails, MessageKey, MessageNonce};
use codec::Decode;
use frame_support::weights::Weight;
use bp_messages::{
InboundMessageDetails, LaneId, MessageNonce, MessagePayload, OutboundMessageDetails,
};
use sp_std::vec::Vec;
/// Implementation of the `To*OutboundLaneApi::message_details`.
pub fn outbound_message_details<Runtime, MessagesPalletInstance, BridgeConfig, XcmWeigher>(
pub fn outbound_message_details<Runtime, MessagesPalletInstance>(
lane: LaneId,
begin: MessageNonce,
end: MessageNonce,
) -> Vec<MessageDetails<Runtime::OutboundMessageFee>>
) -> Vec<OutboundMessageDetails<Runtime::OutboundMessageFee>>
where
Runtime: pallet_bridge_messages::Config<MessagesPalletInstance>,
MessagesPalletInstance: 'static,
BridgeConfig: MessageBridge,
XcmWeigher: xcm_executor::traits::WeightBounds<()>,
{
(begin..=end)
.filter_map(|nonce| {
let message_data =
pallet_bridge_messages::Pallet::<Runtime, MessagesPalletInstance>::outbound_message_data(lane, nonce)?;
Some(MessageDetails {
Some(OutboundMessageDetails {
nonce,
// this shall match the similar code in the `FromBridgedChainMessageDispatch` - if we have failed
// to decode or estimate dispatch weight, we'll just return 0 to disable actual execution
dispatch_weight: compute_message_weight::<XcmWeigher>(
MessageKey { lane_id: lane, nonce },
&message_data.payload,
).unwrap_or(0),
// dispatch message weight is always zero at the source chain, since we're paying for
// dispatch at the target chain
dispatch_weight: 0,
size: message_data.payload.len() as _,
delivery_and_dispatch_fee: message_data.fee,
// we're delivering XCM messages here, so fee is always paid at the target chain
dispatch_fee_payment: bp_runtime::messages::DispatchFeePayment::AtTargetChain,
})
})
.collect()
}
// at the source chain we don't know the type of target chain `Call` => `()` is used (it is
// similarly currently used in Polkadot codebase)
fn compute_message_weight<XcmWeigher: xcm_executor::traits::WeightBounds<()>>(
message_key: MessageKey,
encoded_payload: &[u8],
) -> Result<Weight, ()> {
let mut payload = FromBridgedChainMessagePayload::<()>::decode(&mut &encoded_payload[..])
.map_err(|e| {
log::debug!(
target: "runtime::bridge-dispatch",
"Failed to decode outbound XCM message {:?}: {:?}",
message_key,
e,
);
})?;
let weight = XcmWeigher::weight(&mut payload.xcm.1);
let weight = weight.map_err(|e| {
log::debug!(
target: "runtime::bridge-dispatch",
"Failed to compute dispatch weight of outbound XCM message {:?}: {:?}",
message_key,
e,
);
})?;
Ok(weight)
/// Implementation of the `To*InboundLaneApi::message_details`.
pub fn inbound_message_details<Runtime, MessagesPalletInstance>(
lane: LaneId,
messages: Vec<(MessagePayload, OutboundMessageDetails<Runtime::InboundMessageFee>)>,
) -> Vec<InboundMessageDetails>
where
Runtime: pallet_bridge_messages::Config<MessagesPalletInstance>,
MessagesPalletInstance: 'static,
{
messages
.into_iter()
.map(|(payload, details)| {
pallet_bridge_messages::Pallet::<Runtime, MessagesPalletInstance>::inbound_message_data(
lane, payload, details,
)
})
.collect()
}