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Bound number of assets which can be withdrawn to pay for execution.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

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merged 4 commits into from
Aug 22, 2023
Merged

Bound number of assets which can be withdrawn to pay for execution.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

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fdf78b7
Bound number of assets which can be withdrawn to pay for execution.
gavofyork Aug 18, 2023
0c8a3bc
".git/.scripts/commands/fmt/fmt.sh"
Aug 18, 2023
304267c
Include ClaimAsset in limiting the assets
franciscoaguirre Aug 21, 2023
1b34ff9
Change max assets to constant
franciscoaguirre Aug 21, 2023
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10 changes: 6 additions & 4 deletions xcm/xcm-builder/src/barriers.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -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
/// payments into account.
///
Expand Down Expand Up @@ -79,10 +81,10 @@ impl<T: Contains<MultiLocation>> ShouldExecute for AllowTopLevelPaidExecutionFro
instructions[..end]
.matcher()
.match_next_inst(|inst| match inst {
ReceiveTeleportedAsset(..) |
WithdrawAsset(..) |
ReserveAssetDeposited(..) |
ClaimAsset { .. } => Ok(()),
ReceiveTeleportedAsset(..) | ReserveAssetDeposited(..) => Ok(()),
WithdrawAsset(ref assets) if assets.len() <= MAX_ASSETS_FOR_BUY_EXECUTION => Ok(()),
ClaimAsset { ref assets, .. } if assets.len() <= MAX_ASSETS_FOR_BUY_EXECUTION =>
Ok(()),
_ => Err(ProcessMessageError::BadFormat),
})?
.skip_inst_while(|inst| matches!(inst, ClearOrigin))?
Expand Down