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Bound number of assets which can be withdrawn to pay for execution. (#7641)

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* Bound number of assets which can be withdrawn to pay for execution.

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

* Include ClaimAsset in limiting the assets

* Change max assets to constant

---------

Co-authored-by: command-bot <>
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>
This commit is contained in:
Gavin Wood
2023-08-22 13:19:05 +02:00
committed by GitHub
parent e0a2c78a43
commit 26be0727e5
1 changed files with 6 additions and 4 deletions
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polkadot/xcm/xcm-builder/src/barriers.rs
+6 -4
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@@ -52,6 +52,8 @@ impl ShouldExecute for TakeWeightCredit {
} }
} }
const MAX_ASSETS_FOR_BUY_EXECUTION: usize = 1;
/// Allows execution from `origin` if it is contained in `T` (i.e. `T::Contains(origin)`) taking /// Allows execution from `origin` if it is contained in `T` (i.e. `T::Contains(origin)`) taking
/// payments into account. /// payments into account.
/// ///
@@ -79,10 +81,10 @@ impl<T: Contains<MultiLocation>> ShouldExecute for AllowTopLevelPaidExecutionFro
instructions[..end] instructions[..end]
.matcher() .matcher()
.match_next_inst(|inst| match inst { .match_next_inst(|inst| match inst {
ReceiveTeleportedAsset(..) | ReceiveTeleportedAsset(..) | ReserveAssetDeposited(..) => Ok(()),
WithdrawAsset(..) | WithdrawAsset(ref assets) if assets.len() <= MAX_ASSETS_FOR_BUY_EXECUTION => Ok(()),
ReserveAssetDeposited(..) | ClaimAsset { ref assets, .. } if assets.len() <= MAX_ASSETS_FOR_BUY_EXECUTION =>
ClaimAsset { .. } => Ok(()), Ok(()),
_ => Err(ProcessMessageError::BadFormat), _ => Err(ProcessMessageError::BadFormat),
})? })?
.skip_inst_while(|inst| matches!(inst, ClearOrigin))? .skip_inst_while(|inst| matches!(inst, ClearOrigin))?