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pezkuwi-subxt/cumulus/parachains/runtimes/bridge-hubs/README.md
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Branislav Kontur 1b1fab0da3 [testnet] Add AssetHubRococo <-> AssetHubWestend asset bridging support (#1967) 
## Summary

Asset bridging support for AssetHub**Rococo** <-> AssetHub**Wococo** was
added [here](https://github.com/paritytech/polkadot-sdk/pull/1215), so
now we aim to bridge AssetHub**Rococo** and AssetHub**Westend**. (And
perhaps retire AssetHubWococo and the Wococo chains).

## Solution

**bridge-hub-westend-runtime**
- added new runtime as a copy of `bridge-hub-rococo-runtime`
- added support for bridging to `BridgeHubRococo`
- added tests and benchmarks

**bridge-hub-rococo-runtime**
- added support for bridging to `BridgeHubWestend`
- added tests and benchmarks
- internal refactoring by splitting bridge configuration per network,
e.g., `bridge_to_whatevernetwork_config.rs`.

**asset-hub-rococo-runtime**
- added support for asset bridging to `AssetHubWestend` (allows to
receive only WNDs)
- added new xcm router for `Westend`
- added tests and benchmarks

**asset-hub-westend-runtime**
- added support for asset bridging to `AssetHubRococo` (allows to
receive only ROCs)
- added new xcm router for `Rococo`
- added tests and benchmarks

## Deployment

All changes will be deployed as a part of
https://github.com/paritytech/polkadot-sdk/issues/1988.

## TODO

- [x] benchmarks for all pallet instances
- [x] integration tests
- [x] local run scripts


Relates to:
https://github.com/paritytech/parity-bridges-common/issues/2602
Relates to: https://github.com/paritytech/polkadot-sdk/issues/1988

---------

Co-authored-by: command-bot <>
Co-authored-by: Adrian Catangiu <adrian@parity.io>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
2023-11-02 00:39:49 +01:00

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- [Bridge-hub Parachains](#bridge-hub-parachains)
- [Requirements for local run/testing](#requirements-for-local-runtesting)
- [How to test local Rococo <-> Wococo bridge](#how-to-test-local-rococo---wococo-bridge)
- [Run Rococo/Wococo chains with zombienet](#run-rococowococo-chains-with-zombienet)
- [Init bridge and run relayer between BridgeHubRococo and
BridgeHubWococo](#init-bridge-and-run-relayer-between-bridgehubrococo-and-bridgehubwococo)
- [Initialize configuration for transfer asset over bridge
(ROCs/WOCs)](#initialize-configuration-for-transfer-asset-over-bridge-rocswocs)
- [Send messages - transfer asset over bridge (ROCs/WOCs)](#send-messages---transfer-asset-over-bridge-rocswocs)
- [Claim relayer's rewards on BridgeHubRococo and
BridgeHubWococo](#claim-relayers-rewards-on-bridgehubrococo-and-bridgehubwococo)
- [How to test local Rococo <-> Westend bridge](#how-to-test-local-rococo---westend-bridge)
- [Run Rococo/Westend chains with zombienet](#run-rococowestend-chains-with-zombienet)
- [Init bridge and run relayer between BridgeHubRococo and
BridgeHubWestend](#init-bridge-and-run-relayer-between-bridgehubrococo-and-bridgehubwestend)
- [Initialize configuration for transfer asset over bridge
(ROCs/WNDs)](#initialize-configuration-for-transfer-asset-over-bridge-rocswnds)
- [Send messages - transfer asset over bridge (ROCs/WNDs)](#send-messages---transfer-asset-over-bridge-rocswnds)
- [Claim relayer's rewards on BridgeHubRococo and
BridgeHubWestend](#claim-relayers-rewards-on-bridgehubrococo-and-bridgehubwestend)
- [How to test local BridgeHubKusama/BridgeHubPolkadot](#how-to-test-local-bridgehubkusamabridgehubpolkadot)
# Bridge-hub Parachains
_BridgeHub(s)_ are **_system parachains_** that will house trustless bridges from the local ecosystem to others. The
current trustless bridges planned for the BridgeHub(s) are:
- `BridgeHubPolkadot` system parachain:
1. Polkadot <-> Kusama bridge
2. Polkadot <-> Ethereum bridge (Snowbridge)
- `BridgeHubKusama` system parachain:
1. Kusama <-> Polkadot bridge
2. Kusama <-> Ethereum bridge The high-level
responsibilities of each bridge living on BridgeHub:
- sync finality proofs between relay chains (or equivalent)
- sync finality proofs between BridgeHub parachains
- pass (XCM) messages between different BridgeHub parachains
![](./docs/bridge-hub-parachain-design.jpg "Basic deployment setup")
## Requirements for local run/testing
```
# Prepare empty directory for testing
mkdir -p ~/local_bridge_testing/bin
mkdir -p ~/local_bridge_testing/logs
---
# 1. Install zombienet
Go to: https://github.com/paritytech/zombienet/releases
Copy the apropriate binary (zombienet-linux) from the latest release to ~/local_bridge_testing/bin
---
# 2. Build polkadot binary
# If you want to test Kusama/Polkadot bridge, we need "sudo pallet + fast-runtime",
# so we need to use sudofi in polkadot directory.
#
# Install sudofi: (skip if already installed)
# cd <somewhere-outside-polkadot-sdk-git-repo-dir>
# git clone https://github.com/paritytech/parachain-utils.git
# cd parachain-utils # -> this is <parachain-utils-git-repo-dir>
# cargo build --release --bin sudofi
#
# cd <polkadot-sdk-git-repo-dir>/polkadot
# <parachain-utils-git-repo-dir>/target/release/sudofi
cd <polkadot-sdk-git-repo-dir>
cargo build --release --features fast-runtime --bin polkadot
cp target/release/polkadot ~/local_bridge_testing/bin/polkadot
cargo build --release --features fast-runtime --bin polkadot-prepare-worker
cp target/release/polkadot-prepare-worker ~/local_bridge_testing/bin/polkadot-prepare-worker
cargo build --release --features fast-runtime --bin polkadot-execute-worker
cp target/release/polkadot-execute-worker ~/local_bridge_testing/bin/polkadot-execute-worker
---
# 3. Build substrate-relay binary
git clone https://github.com/paritytech/parity-bridges-common.git
cd parity-bridges-common
# checkout desired branch or use master:
# git checkout -b master --track origin/master
# `polkadot-staging` (recommended) is stabilized and compatible for Cumulus releases
# `master` is latest development
git checkout -b polkadot-staging --track origin/polkadot-staging
cargo build --release -p substrate-relay
cp target/release/substrate-relay ~/local_bridge_testing/bin/substrate-relay
---
# 4. Build cumulus polkadot-parachain binary
cd <polkadot-sdk-git-repo-dir>
cargo build --release -p polkadot-parachain-bin
cp target/release/polkadot-parachain ~/local_bridge_testing/bin/polkadot-parachain
cp target/release/polkadot-parachain ~/local_bridge_testing/bin/polkadot-parachain-asset-hub
```
## How to test local Rococo <-> Wococo bridge
### Run Rococo/Wococo chains with zombienet
```
cd <polkadot-sdk-git-repo-dir>
# Rococo + BridgeHubRococo + AssetHub for Rococo (mirroring Kusama)
POLKADOT_BINARY_PATH=~/local_bridge_testing/bin/polkadot \
POLKADOT_PARACHAIN_BINARY_PATH=~/local_bridge_testing/bin/polkadot-parachain \
POLKADOT_PARACHAIN_BINARY_PATH_FOR_ASSET_HUB_ROCOCO=~/local_bridge_testing/bin/polkadot-parachain-asset-hub \
~/local_bridge_testing/bin/zombienet-linux --provider native spawn ./cumulus/zombienet/bridge-hubs/bridge_hub_rococo_local_network.toml
```
```
cd <polkadot-sdk-git-repo-dir>
# Wococo + BridgeHubWococo + AssetHub for Wococo (mirroring Polkadot)
POLKADOT_BINARY_PATH=~/local_bridge_testing/bin/polkadot \
POLKADOT_PARACHAIN_BINARY_PATH=~/local_bridge_testing/bin/polkadot-parachain \
POLKADOT_PARACHAIN_BINARY_PATH_FOR_ASSET_HUB_WOCOCO=~/local_bridge_testing/bin/polkadot-parachain-asset-hub \
~/local_bridge_testing/bin/zombienet-linux --provider native spawn ./cumulus/zombienet/bridge-hubs/bridge_hub_wococo_local_network.toml
```
### Init bridge and run relayer between BridgeHubRococo and BridgeHubWococo
**Accounts of BridgeHub parachains:**
- `Bob` is pallet owner of all bridge pallets
#### Run with script
```
cd <polkadot-sdk-git-repo-dir>
./cumulus/scripts/bridges_rococo_wococo.sh run-relay
```
**Check relay-chain headers relaying:**
- Rococo parachain: - https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A8943#/chainstate - Pallet:
**bridgeWococoGrandpa** - Keys: **bestFinalized()**
- Wococo parachain: - https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A8945#/chainstate - Pallet:
**bridgeRococoGrandpa** - Keys: **bestFinalized()**
**Check parachain headers relaying:**
- Rococo parachain: - https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A8943#/chainstate - Pallet:
**bridgeWococoParachains** - Keys: **parasInfo(None)**
- Wococo parachain: - https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A8945#/chainstate - Pallet:
**bridgeRococoParachains** - Keys: **parasInfo(None)**
### Initialize configuration for transfer asset over bridge (ROCs/WOCs)
This initialization does several things:
- creates `ForeignAssets` for wrappedROCs/wrappedWOCs
- drips SA for AssetHubRococo on AssetHubWococo (and vice versa) which holds reserved assets on source chains
```
cd <polkadot-sdk-git-repo-dir>
./cumulus/scripts/bridges_rococo_wococo.sh init-asset-hub-rococo-local
./cumulus/scripts/bridges_rococo_wococo.sh init-bridge-hub-rococo-local
./cumulus/scripts/bridges_rococo_wococo.sh init-asset-hub-wococo-local
./cumulus/scripts/bridges_rococo_wococo.sh init-bridge-hub-wococo-local
```
### Send messages - transfer asset over bridge (ROCs/WOCs)
Do (asset) transfers:
```
cd <polkadot-sdk-git-repo-dir>
# ROCs from Rococo's Asset Hub to Wococo's.
./cumulus/scripts/bridges_rococo_wococo.sh reserve-transfer-assets-from-asset-hub-rococo-local
```
```
cd <polkadot-sdk-git-repo-dir>
# WOCs from Wococo's Asset Hub to Rococo's.
./cumulus/scripts/bridges_rococo_wococo.sh reserve-transfer-assets-from-asset-hub-wococo-local
```
- open explorers: (see zombienets)
- AssetHubRococo (see events `xcmpQueue.XcmpMessageSent`, `polkadotXcm.Attempted`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:9910#/explorer
- BridgeHubRococo (see `bridgeWococoMessages.MessageAccepted`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8943#/explorer
- BridgeHubWococo (see `bridgeRococoMessages.MessagesReceived`, `xcmpQueue.XcmpMessageSent`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8945#/explorer
- AssetHubWococo (see `foreignAssets.Issued`, `xcmpQueue.Success`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:9010#/explorer
- BridgeHubRocococ (see `bridgeWococoMessages.MessagesDelivered`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8943#/explorer
### Claim relayer's rewards on BridgeHubRococo and BridgeHubWococo
**Accounts of BridgeHub parachains:**
- `//Charlie` is relayer account on BridgeHubRococo
- `//Charlie` is relayer account on BridgeHubWococo
```
cd <polkadot-sdk-git-repo-dir>
# Claim rewards on BridgeHubWococo:
./cumulus/scripts/bridges_rococo_wococo.sh claim-rewards-bridge-hub-rococo-local
# Claim rewards on BridgeHubWococo:
./cumulus/scripts/bridges_rococo_wococo.sh claim-rewards-bridge-hub-wococo-local
```
- open explorers: (see zombienets)
- BridgeHubRococo (see 2x `bridgeRelayers.RewardPaid`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8943#/explorer
- BridgeHubWococo (see 2x `bridgeRelayers.RewardPaid`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8945#/explorer
## How to test local Rococo <-> Westend bridge
### Run Rococo/Westend chains with zombienet
```
cd <polkadot-sdk-git-repo-dir>
# Rococo + BridgeHubRococo + AssetHub for Rococo (mirroring Kusama)
POLKADOT_BINARY_PATH=~/local_bridge_testing/bin/polkadot \
POLKADOT_PARACHAIN_BINARY_PATH=~/local_bridge_testing/bin/polkadot-parachain \
POLKADOT_PARACHAIN_BINARY_PATH_FOR_ASSET_HUB_ROCOCO=~/local_bridge_testing/bin/polkadot-parachain-asset-hub \
~/local_bridge_testing/bin/zombienet-linux --provider native spawn ./cumulus/zombienet/bridge-hubs/bridge_hub_rococo_local_network.toml
```
```
cd <polkadot-sdk-git-repo-dir>
# Westend + BridgeHubWestend + AssetHub for Westend (mirroring Polkadot)
POLKADOT_BINARY_PATH=~/local_bridge_testing/bin/polkadot \
POLKADOT_PARACHAIN_BINARY_PATH=~/local_bridge_testing/bin/polkadot-parachain \
POLKADOT_PARACHAIN_BINARY_PATH_FOR_ASSET_HUB_WESTEND=~/local_bridge_testing/bin/polkadot-parachain-asset-hub \
~/local_bridge_testing/bin/zombienet-linux --provider native spawn ./cumulus/zombienet/bridge-hubs/bridge_hub_westend_local_network.toml
```
### Init bridge and run relayer between BridgeHubRococo and BridgeHubWestend
**Accounts of BridgeHub parachains:**
- `Bob` is pallet owner of all bridge pallets
#### Run with script
```
cd <polkadot-sdk-git-repo-dir>
./cumulus/scripts/bridges_rococo_westend.sh run-relay
```
**Check relay-chain headers relaying:**
- Rococo parachain: - https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A8943#/chainstate - Pallet:
**bridgeWestendGrandpa** - Keys: **bestFinalized()**
- Westend parachain: - https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A8945#/chainstate - Pallet:
**bridgeRococoGrandpa** - Keys: **bestFinalized()**
**Check parachain headers relaying:**
- Rococo parachain: - https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A8943#/chainstate - Pallet:
**bridgeWestendParachains** - Keys: **parasInfo(None)**
- Westend parachain: - https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A8945#/chainstate - Pallet:
**bridgeRococoParachains** - Keys: **parasInfo(None)**
### Initialize configuration for transfer asset over bridge (ROCs/WNDs)
This initialization does several things:
- creates `ForeignAssets` for wrappedROCs/wrappedWNDs
- drips SA for AssetHubRococo on AssetHubWestend (and vice versa) which holds reserved assets on source chains
```
cd <polkadot-sdk-git-repo-dir>
./cumulus/scripts/bridges_rococo_westend.sh init-asset-hub-rococo-local
./cumulus/scripts/bridges_rococo_westend.sh init-bridge-hub-rococo-local
./cumulus/scripts/bridges_rococo_westend.sh init-asset-hub-westend-local
./cumulus/scripts/bridges_rococo_westend.sh init-bridge-hub-westend-local
```
### Send messages - transfer asset over bridge (ROCs/WNDs)
Do (asset) transfers:
```
cd <polkadot-sdk-git-repo-dir>
# ROCs from Rococo's Asset Hub to Westend's.
./cumulus/scripts/bridges_rococo_westend.sh reserve-transfer-assets-from-asset-hub-rococo-local
```
```
cd <polkadot-sdk-git-repo-dir>
# WNDs from Westend's Asset Hub to Rococo's.
./cumulus/scripts/bridges_rococo_westend.sh reserve-transfer-assets-from-asset-hub-westend-local
```
- open explorers: (see zombienets)
- AssetHubRococo (see events `xcmpQueue.XcmpMessageSent`, `polkadotXcm.Attempted`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:9910#/explorer
- BridgeHubRococo (see `bridgeWestendMessages.MessageAccepted`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8943#/explorer
- BridgeHubWestend (see `bridgeRococoMessages.MessagesReceived`, `xcmpQueue.XcmpMessageSent`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8945#/explorer
- AssetHubWestend (see `foreignAssets.Issued`, `xcmpQueue.Success`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:9010#/explorer
- BridgeHubRocococ (see `bridgeWestendMessages.MessagesDelivered`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8943#/explorer
### Claim relayer's rewards on BridgeHubRococo and BridgeHubWestend
**Accounts of BridgeHub parachains:**
- `//Charlie` is relayer account on BridgeHubRococo
- `//Charlie` is relayer account on BridgeHubWestend
```
cd <polkadot-sdk-git-repo-dir>
# Claim rewards on BridgeHubWestend:
./cumulus/scripts/bridges_rococo_westend.sh claim-rewards-bridge-hub-rococo-local
# Claim rewards on BridgeHubWestend:
./cumulus/scripts/bridges_rococo_westend.sh claim-rewards-bridge-hub-westend-local
```
- open explorers: (see zombienets)
- BridgeHubRococo (see 2x `bridgeRelayers.RewardPaid`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8943#/explorer
- BridgeHubWestend (see 2x `bridgeRelayers.RewardPaid`) https://polkadot.js.org/apps/?rpc=ws://127.0.0.1:8945#/explorer
## How to test local BridgeHubKusama/BridgeHubPolkadot
TODO: see `# !!! READ HERE` above
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