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[migrations] Migration from static Lanes to dynamic lanes (master) #2794

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bkontur opened this issue Jan 17, 2024 · 1 comment
Closed
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[migrations] Migration from static Lanes to dynamic lanes (master) #2794

bkontur opened this issue Jan 17, 2024 · 1 comment
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@bkontur
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bkontur commented Jan 17, 2024

Actually, we defined hard-coded lane between AssetHubs (Ro/We, K/P), but we need to have migration from this static to dynamic lanes stored on-chain.

I think we don't need this for Rococo/Westend, we can to governance calls (but maybe it would be cool to test migration).
But surely, we need this for Kusama/Polkadot, because when we upgrade runtimes to the dynamic lanes, we cannot wait for follow-up governance calls to establish lane between AssetHubs again.

  • check what everything needs to be migrated
    • storage
    • laneIds
  • prepare migration
  • add migration to the polkadot-fellows repo
@bkontur bkontur self-assigned this Jan 17, 2024
@bkontur bkontur moved this to High Priority in Bridges + XCM May 2, 2024
@bkontur bkontur moved this from High Priority to Todo in Bridges + XCM May 2, 2024
@bkontur bkontur moved this from Todo to High Priority in Bridges + XCM Jul 16, 2024
@bkontur bkontur moved this from High Priority to In Progress in Bridges + XCM Jul 16, 2024
github-merge-queue bot pushed a commit to paritytech/polkadot-sdk that referenced this issue Sep 2, 2024
Relates to:
paritytech/parity-bridges-common#2451
Closes: paritytech/parity-bridges-common#2500

## Summary

Now, the bridging pallet supports only static lanes, which means lanes
that are hard-coded in the runtime files. This PR fixes that and adds
support for dynamic, also known as permissionless, lanes. This means
that allowed origins (relay chain, sibling parachains) can open and
close bridges (through BridgeHubs) with another bridged (substrate-like)
consensus using just `xcm::Transact` and `OriginKind::Xcm`.

_This PR is based on the migrated code from the Bridges V2
[branch](#4427) from the
old `parity-bridges-common`
[repo](https://github.com/paritytech/parity-bridges-common/tree/bridges-v2)._

## Explanation

Please read
[bridges/modules/xcm-bridge-hub/src/lib.rs](https://github.com/paritytech/polkadot-sdk/blob/149b0ac2ce43fba197988f2642032fa24dd8289a/bridges/modules/xcm-bridge-hub/src/lib.rs#L17-L136)
to understand how managing bridges works. The basic concepts around
`BridgeId` and `LaneId` are also explained there.


## TODO

- [x] search and fix for comment: `// TODO:(bridges-v2) - most of that
stuff was introduced with free header execution:
https://github.com/paritytech/polkadot-sdk/pull/4102` - more info in the
comment
[bellow](#4427 (comment))
- [x] TODO: there's only one impl of `EnsureOrigin<Success = Location>`

## TODO - not blocking review

**benchmarking:**
- [x] regenerate all relevant weights for BH/AH runtimes
- [ ] regenerate default weights for bridging pallets e.g.
`modules/messages/src/weights.rs`
- [ ] add benchmarks for `xcm-bridge-hub` pallet
#5550

**testing:**
- [ ] add xcm-emulator tests for Rococo/Penpal to Westend/Penpal with
full opening channel and sending/receiving `xcm::Transact`

**migrations:**
- [x] add migrations for BridgeHubRococo/Westend
paritytech/parity-bridges-common#2794 (to be
reusable for P/K bridge)
  - [x] check also storage migration, if needed for pallets
  - [ ] migration for XCM type (optional)
  - [x] migration for static lanes to the dynamic (reuse for fellows)

**investigation:**
- [ ] revisit
paritytech/parity-bridges-common#2380
- [ ] check congestion around `LocalXcmChannelManager` and
`OutboundLanesCongestedSignals` impls -
#5551
  - to be reusable for polkadot-fellows
- return `report_bridge_status` was remove, so we need to `XcmpQueue`
alternative?

---------

Signed-off-by: Branislav Kontur <[email protected]>
Co-authored-by: Svyatoslav Nikolsky <[email protected]>
Co-authored-by: command-bot <>
Co-authored-by: Francisco Aguirre <[email protected]>
x3c41a pushed a commit to paritytech/polkadot-sdk that referenced this issue Sep 4, 2024
Relates to:
paritytech/parity-bridges-common#2451
Closes: paritytech/parity-bridges-common#2500

## Summary

Now, the bridging pallet supports only static lanes, which means lanes
that are hard-coded in the runtime files. This PR fixes that and adds
support for dynamic, also known as permissionless, lanes. This means
that allowed origins (relay chain, sibling parachains) can open and
close bridges (through BridgeHubs) with another bridged (substrate-like)
consensus using just `xcm::Transact` and `OriginKind::Xcm`.

_This PR is based on the migrated code from the Bridges V2
[branch](#4427) from the
old `parity-bridges-common`
[repo](https://github.com/paritytech/parity-bridges-common/tree/bridges-v2)._

## Explanation

Please read
[bridges/modules/xcm-bridge-hub/src/lib.rs](https://github.com/paritytech/polkadot-sdk/blob/149b0ac2ce43fba197988f2642032fa24dd8289a/bridges/modules/xcm-bridge-hub/src/lib.rs#L17-L136)
to understand how managing bridges works. The basic concepts around
`BridgeId` and `LaneId` are also explained there.

## TODO

- [x] search and fix for comment: `// TODO:(bridges-v2) - most of that
stuff was introduced with free header execution:
https://github.com/paritytech/polkadot-sdk/pull/4102` - more info in the
comment
[bellow](#4427 (comment))
- [x] TODO: there's only one impl of `EnsureOrigin<Success = Location>`

## TODO - not blocking review

**benchmarking:**
- [x] regenerate all relevant weights for BH/AH runtimes
- [ ] regenerate default weights for bridging pallets e.g.
`modules/messages/src/weights.rs`
- [ ] add benchmarks for `xcm-bridge-hub` pallet
#5550

**testing:**
- [ ] add xcm-emulator tests for Rococo/Penpal to Westend/Penpal with
full opening channel and sending/receiving `xcm::Transact`

**migrations:**
- [x] add migrations for BridgeHubRococo/Westend
paritytech/parity-bridges-common#2794 (to be
reusable for P/K bridge)
  - [x] check also storage migration, if needed for pallets
  - [ ] migration for XCM type (optional)
  - [x] migration for static lanes to the dynamic (reuse for fellows)

**investigation:**
- [ ] revisit
paritytech/parity-bridges-common#2380
- [ ] check congestion around `LocalXcmChannelManager` and
`OutboundLanesCongestedSignals` impls -
#5551
  - to be reusable for polkadot-fellows
- return `report_bridge_status` was remove, so we need to `XcmpQueue`
alternative?

---------

Signed-off-by: Branislav Kontur <[email protected]>
Co-authored-by: Svyatoslav Nikolsky <[email protected]>
Co-authored-by: command-bot <>
Co-authored-by: Francisco Aguirre <[email protected]>
@bkontur
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bkontur commented Sep 13, 2024

this was already merged to the polkadot-sdk master

@bkontur bkontur closed this as completed Sep 13, 2024
@github-project-automation github-project-automation bot moved this from In Progress to Done in Bridges + XCM Sep 13, 2024
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