Snowbridge Beacon header age check #3727

claravanstaden · 2024-03-18T06:18:50Z

Bug Explanation

Adds a check that prevents finalized headers with a gap larger than the sync committee period being imported, which could cause execution headers in the gap being unprovable. The current version of the Ethereum client checks that there is a header at least every sync committee, but it doesn't check that the headers are within a sync period of each other. For example:

Header 100 (sync committee period 1)
Header 9000 (sync committee period 2)
(8900 blocks apart)

These headers are in adjacent sync committees, but more than the sync committee period (8192 blocks) apart.

The reason we need a header every 8192 slots at least, is the header is used to prove messages within the last 8192 blocks. If we import header 9000, and we receive a message to be verified at header 200, the block_roots field of header 9000 won't contain the header in order to do the ancestry check.

Environment

While running in Rococo, this edge case was discovered after the relayer was offline for a few days. It is unlikely, but not impossible, to happen again and so it should be backported to polkadot-sdk 1.7.0 (so that polkadot-fellows/runtimes can be updated with the fix).

Our Ethereum client has been operational on Rococo for the past few months, and this been the only major issue discovered so far.

Unrelated Change

An unrelated nit: Removes a left over file that should have been deleted when the parachain directory was removed.

vgeddes · 2024-03-22T07:34:15Z

bridges/snowbridge/pallets/ethereum-client/src/lib.rs

@@ -15,8 +15,6 @@
 //! ## Consensus Updates
 //!
 //! * [`Call::submit`]: Submit a finalized beacon header with an optional sync committee update
-//! * [`Call::submit_execution_header`]: Submit an execution header together with an ancestry proof


This does not seem relevant?

Correct, reverted in 27ecafd.

vgeddes · 2024-03-22T07:43:26Z

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

@@ -286,8 +286,8 @@ impl Contains<RuntimeCall> for SafeCallFilter {
 		match call {
 			RuntimeCall::System(frame_system::Call::set_storage { items })
 				if items.iter().all(|(k, _)| {
-					k.eq(&bridging::XcmBridgeHubRouterByteFee::key()) |


While this is certainly a bug you're fixing, its still not relevant to the issue in the beacon light client. I suggest updating the PR description, saying you added some miscellaneous unrelated fixes.

I reverted this change to keep the PR as focused as possible. I added the change in this PR: #3761

…acon-header-age-check

## Bug Explanation Adds a check that prevents finalized headers with a gap larger than the sync committee period being imported, which could cause execution headers in the gap being unprovable. The current version of the Ethereum client checks that there is a header at least every sync committee, but it doesn't check that the headers are within a sync period of each other. For example: Header 100 (sync committee period 1) Header 9000 (sync committee period 2) (8900 blocks apart) These headers are in adjacent sync committees, but more than the sync committee period (8192 blocks) apart. The reason we need a header every 8192 slots at least, is the header is used to prove messages within the last 8192 blocks. If we import header 9000, and we receive a message to be verified at header 200, the `block_roots` field of header 9000 won't contain the header in order to do the ancestry check. ## Environment While running in Rococo, this edge case was discovered after the relayer was offline for a few days. It is unlikely, but not impossible, to happen again and so it should be backported to polkadot-sdk 1.7.0 (so that [polkadot-fellows/runtimes](https://github.com/polkadot-fellows/runtimes) can be updated with the fix). Our Ethereum client has been operational on Rococo for the past few months, and this been the only major issue discovered so far. ### Unrelated Change An unrelated nit: Removes a left over file that should have been deleted when the `parachain` directory was removed. --------- Co-authored-by: claravanstaden <Cats 4 life!>

…nsure safety margins (#3791) This is a cherry-pick from master of #3727 and #3790 Expected patches for (1.7.0): snowbridge-pallet-ethereum-client snowbridge-pallet-inbound-queue snowbridge-pallet-outbound-queue snowbridge-outbound-queue-runtime-api snowbridge-pallet-system snowbridge-core

## Bug Explanation Adds a check that prevents finalized headers with a gap larger than the sync committee period being imported, which could cause execution headers in the gap being unprovable. The current version of the Ethereum client checks that there is a header at least every sync committee, but it doesn't check that the headers are within a sync period of each other. For example: Header 100 (sync committee period 1) Header 9000 (sync committee period 2) (8900 blocks apart) These headers are in adjacent sync committees, but more than the sync committee period (8192 blocks) apart. The reason we need a header every 8192 slots at least, is the header is used to prove messages within the last 8192 blocks. If we import header 9000, and we receive a message to be verified at header 200, the `block_roots` field of header 9000 won't contain the header in order to do the ancestry check. ## Environment While running in Rococo, this edge case was discovered after the relayer was offline for a few days. It is unlikely, but not impossible, to happen again and so it should be backported to polkadot-sdk 1.7.0 (so that [polkadot-fellows/runtimes](https://github.com/polkadot-fellows/runtimes) can be updated with the fix). Our Ethereum client has been operational on Rococo for the past few months, and this been the only major issue discovered so far. ### Unrelated Change An unrelated nit: Removes a left over file that should have been deleted when the `parachain` directory was removed. --------- Co-authored-by: claravanstaden <Cats 4 life!>

…nsure safety margins (paritytech#3791) This is a cherry-pick from master of paritytech#3727 and paritytech#3790 Expected patches for (1.7.0): snowbridge-pallet-ethereum-client snowbridge-pallet-inbound-queue snowbridge-pallet-outbound-queue snowbridge-outbound-queue-runtime-api snowbridge-pallet-system snowbridge-core

…nsure safety margins (#3814) This is a cherry-pick from master of #3790 and #3727 Expected patches for (1.8.0): snowbridge-pallet-ethereum-client snowbridge-pallet-inbound-queue snowbridge-pallet-outbound-queue snowbridge-outbound-queue-runtime-api snowbridge-pallet-system snowbridge-core --------- Co-authored-by: Vincent Geddes <vincent@snowfork.com> Co-authored-by: Vincent Geddes <vincent.geddes@hey.com> Co-authored-by: Adrian Catangiu <adrian@parity.io>

…nsure safety margins (#3815) This is a cherry-pick from master of #3790 and #3727 Expected patches for (1.9.0): snowbridge-pallet-ethereum-client snowbridge-pallet-inbound-queue snowbridge-pallet-outbound-queue snowbridge-outbound-queue-runtime-api snowbridge-pallet-system snowbridge-core --------- Co-authored-by: Vincent Geddes <vincent@snowfork.com> Co-authored-by: Vincent Geddes <vincent.geddes@hey.com> Co-authored-by: Adrian Catangiu <adrian@parity.io>

…c committee in next store period (#4482) This is a cherry-pick from master of [#3790 and #3727 Expected patches for (1.7.0): snowbridge-pallet-ethereum-client Co-authored-by: Vincent Geddes <117534+vgeddes@users.noreply.github.com>

claravanstaden and others added 3 commits March 18, 2024 08:16

adds beacon header age check

cf45b14

Merge branch 'master' into beacon-header-age-check

eb0571e

Merge branch 'master' into beacon-header-age-check

8043f7d

claravanstaden marked this pull request as ready for review March 21, 2024 08:43

paritytech-review-bot bot requested a review from a team March 21, 2024 08:44

claravanstaden and others added 4 commits March 21, 2024 10:52

change bitwise or to logical or

aebec13

taplo

d33c52b

remove rustdoc describing removed extrinsic

3e5124d

Merge branch 'master' into beacon-header-age-check

f5239d2

vgeddes reviewed Mar 22, 2024

View reviewed changes

claravanstaden added 2 commits March 22, 2024 10:36

revert unrelated changes

27ecafd

Merge remote-tracking branch 'origin/beacon-header-age-check' into be…

4c42278

…acon-header-age-check

claravanstaden requested a review from vgeddes March 22, 2024 08:49

acatangiu approved these changes Mar 22, 2024

View reviewed changes

acatangiu added the R0-silent Changes should not be mentioned in any release notes label Mar 22, 2024

acatangiu enabled auto-merge March 22, 2024 09:23

bkontur approved these changes Mar 22, 2024

View reviewed changes

acatangiu added this pull request to the merge queue Mar 22, 2024

Merged via the queue into paritytech:master with commit 3410dfb Mar 22, 2024
133 of 140 checks passed

claravanstaden deleted the beacon-header-age-check branch March 22, 2024 09:51

claravanstaden mentioned this pull request Mar 22, 2024

Snowbridge Beacon header age check #3791

Merged

claravanstaden mentioned this pull request Mar 25, 2024

Snowbridge Beacon header age check and add linear fee multiplier to ensure safety margins #3814

Merged

claravanstaden mentioned this pull request Mar 25, 2024

Snowbridge Beacon header age check and add linear fee multiplier to ensure safety margins #3815

Merged

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Snowbridge Beacon header age check #3727

Snowbridge Beacon header age check #3727

claravanstaden commented Mar 18, 2024 •

edited

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vgeddes Mar 22, 2024

claravanstaden Mar 22, 2024

vgeddes Mar 22, 2024 •

edited

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claravanstaden Mar 22, 2024

Snowbridge Beacon header age check #3727

Snowbridge Beacon header age check #3727

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claravanstaden commented Mar 18, 2024 • edited Loading

Bug Explanation

Environment

Unrelated Change

vgeddes Mar 22, 2024

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vgeddes Mar 22, 2024 • edited Loading

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claravanstaden commented Mar 18, 2024 •

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vgeddes Mar 22, 2024 •

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