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ICS 7 - Allow consensus state updates with older headers

Issue Open
Pull requests: 0
Contributors: 0
Level: Intermediate
  • TeX
Issue Open
Pull requests: 0
Contributors: 0
Level: Intermediate
  • TeX

On GitHub

Specification of the interblockchain communication protocol (IBC).
More info >

Issue posted by: 
ancazamfir's avatar

Anca Zamfir

Description

In the presence of multiple relayers, it can happen that an updateClient transaction fails if its height is smaller than the on chain client state height.

It is possible that there are two relayers scanning for different items, X vs Y, and they require consensus state (CS) updates for same client on destination chain but at different heights. This could result on one of the relayer transaction to fail, as a clientUpdate for height h fails if the latest client height is H >=h.
Some analysis on the relayer logic, given the current ICS07 spec and module implementation, is attempted in informalsystems/ibc-rs#61

This issue is to investigate the possibility of allowing CS updates with heights smaller or equal than the current client state height, and make the required changes in ICS02 (e.g. checkValidityAndUpdateState line 1678) and ICS07 specs, cosmos-SDK and relayer implementations.

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  • tao

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On GitHub

Specification of the interblockchain communication protocol (IBC).
More info >

Issue posted by: 
ancazamfir's avatar

Anca Zamfir

Use Open Source Issues to hire or get hired

ICS 7 - Allow consensus state updates with older headers
View on GitHub