V3: All the hooks

[nambrot]

V3 introduced IPostDispatch hooks which allow arbitrary post-dispatch logic to be executed.

You can hear more about hooks under https://medium.com/hyperlane/hooking-up-the-chains-introducing-hyperlane-hooks-7986d350b16d

One of the most valuable applications of these hooks is that they complete the Modular Security storyline, they make leveraging any other security model like canonical rollup bridges or external bridges a native experience. This ticket tracks all the hooks that can be created with their corresponding ISMs.

Rollup bridges

Beta Give feedback

1. OpStack L1 => L2
2. OpStack L2 => L1 Hook and ISM #2844
   bounty hooks medium modular-security +4
3. Arbitrum/Orbit L1 => L2 Hook and ISM #2845
   bounty extra-small hooks modular-security +4
4. Arbitrum/Orbit L2 => L1 Hook and ISM #2846
   bounty hooks medium modular-security protocol +5
   
5. Polygon Hooks and ISMs #2847
   bounty hooks medium modular-security +4
6. Polygon zkEVM Hooks and ISMs #2848
   bounty hooks medium modular-security +4
7. Scroll Hooks and ISMs #2849
   bounty hooks medium modular-security +4
8. Use rollup proposers for reputational security ISM #3371
   modular-security optimism rollups +3
   

External bridges

Beta Give feedback

1. EIP5164
2. Wormhole Hook and ISM #2850
   bounty hooks large modular-security +4
3. Axelar Hook and ISM #2851
   bounty hooks medium modular-security +4
4. Chainlink CCIP Hook and ISM #2852
   bounty hooks medium modular-security +4
5. LayerZero Hook and ISM #2853
   bounty hooks medium modular-security +4
   
6. Connext Hook and ISM
7. Avalanche Bridge Hook and ISM

ZK Light Clients

Beta Give feedback

1. EVM Succinct ISM for verifying Hyperlane messages with TelepathyX #3092
   bounty hooks medium modular-security +4
   
2. RiscZero ISM #3093
   bounty hooks medium modular-security +4
3. EVM ISM for verifying Hyperlane messages via a TendermintX #3117
   bounty medium modular-security +3
4. CosmWasm ISM for verifying Hyperlane messages with TelepathyX #3118
   bounty medium modular-security +3
5. EVM Succinct BlobstreamX ISM #3158
   bounty hooks medium modular-security +4

For some of these Hooks/ISMs, the underlying transport layer automatically delivers the message on the destination chain (most rollup bridges L1 to L2). For others, it will require someone running a Hyperlane relayer to collect some off-chain information to pass alongside the message to pass verification on the ISM, like a merkle inclusion proof for L2-L1 rollup bridge transactions or external bridge validator signatures. For these cases, we highly recommend to inherit from CCIP-read ISM https://docs.hyperlane.xyz/docs/protocol/ISM/ccip-read-ISM. It allows the ISM developer to only have to build a simple off-chain service and not require integration and operation of a Hyperlane relayer with that specific ISM in mind. You can see examples of that ISM in the wild either at https://github.com/Accio-labs/permissionless-cctp or https://github.com/AlexBHarley/permissionless-chainlink-feeds/

[jommi9]

Hey, who could I DM on telegram about all this work? We actually worked on some very similar things in the past, and would love to contribute to Hyperlane - possibly working on nearly all of these bounties.

My telegram is @Jommi if needed!

[LucasETrigo]

Been trying to figure out support on arbitrary Arb Orbit bridges

[nambrot]

@LucasETrigo can you expand on this?