Darwinia <> Ethereum Bridge Upgrade CheckList

[hackfisher]

• Introduce the message layer for Darwinia <> Ethereum. The message inbound and outbound channel. LockAssetEvents in Backing Module should be refactored to represent as messages in Darwinia Message Outbound Channel. cc @hujw77 @AurevoirXavier .
  • Backing and Issuing renaming darwinia-common#627 and Backing & Issuing might be better to move to (wormhole)token protocol related folders.
  • Ethereum smart contracts for message layer. Use s2s struct and framework to eliminate the requirement of MMR in message layer, and support receive_messages_delivery_proof(and app transactional support) darwinia-messages-sol#76 cc @hujw77
• Replace MMR pallet with parity's Parity MMR darwinia-common#743 and support pruning(for sure), and update the MMR Leaf spec New MMRLeaf Spec darwinia-common#665 cc @AurevoirXavier @hujw77
  • message root part in mmr leaf also related to the optimization of gas fee in Ethereum part
  • BEEFY integration Integrate BEEFY paritytech/substrate#9833, BEEFY integration darwinia-common#746 @AurevoirXavier
  • Custom commitment and MessageRoot in BEEFY @AurevoirXavier
• Adding truth layer in Darwinia > Ethereum by introducing Beefy BEEFY integration darwinia-common#746 @hujw77 @AurevoirXavier
  • Ethereum smart contracts for Beefy and Grandpa light client. cc @hujw77
  • Split guard from truth layer to application layer darwinia-common#755
• Adding truth layer in BSC > Darwinia @hujw77 @xiaoch05
  • BSC light client pallet
  • BSC light client lane_data bsc light client darwinia-common#988 @xiaoch05
• Backing and Issuing upgrade
  • Use new message layer and truth layer(light client) mapping token v2 darwinia-messages-sol#101 cc @xiaoch05 ,
  • Solidity upgrade, remove permission from old contract, and use new contract.
• Basic Relayer Incentive Support: Relayer Fee Market cc @xiaoch05 @hujw77
• Companion Bridger Upgrade cc @furoxr
  • Interact with BEEFY protocol, (Darwinia header relay)
  • Interact with BSC light client pallet (BSC header relay)
  • Message relay
  • Interact with fee market
• Companion wormhole Upgrade cc @1022ranji @sxlwar

[hackfisher]

• Will relayer help user to deliver the message to Ethereum, originally require use to claim by themself.
• Support of deprecated tokens claiming in previous Darwinia > Ethereum bridge.

[AurevoirXavier]

Please update this.

cc @AsceticBear @hackfisher @xiaoch05

[hackfisher]

eth2 : darwinia-network/darwinia-messages-sol#166

[AurevoirXavier]

#843 (comment)