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-# Migrating from ibc-go v3 to v4
-
-This document is intended to highlight significant changes which may require more information than presented in the CHANGELOG.
-Any changes that must be done by a user of ibc-go should be documented here.
-
-There are four sections based on the four potential user groups of this document:
-- Chains
-- IBC Apps
-- Relayers
-- IBC Light Clients
-
-**Note:** ibc-go supports golang semantic versioning and therefore all imports must be updated to bump the version number on major releases.
-```go
-github.com/cosmos/ibc-go/v3 -> github.com/cosmos/ibc-go/v4
-```
-
-No genesis or in-place migrations required when upgrading from v1 or v2 of ibc-go.
-
-## Chains
-
-### IS04 - Channel 
-
-The `WriteAcknowledgement` API now takes the `exported.Acknowledgement` type instead of passing in the acknowledgement byte array directly. 
-This is an API breaking change and as such IBC application developers will have to update any calls to `WriteAcknowledgement`. 
-
-The `OnChanOpenInit` application callback has been modified.
-The return signature now includes the application version as detailed in the latest IBC [spec changes](https://github.com/cosmos/ibc/pull/629).
-
-## Relayers
-
-When using the `DenomTrace` gRPC, the full IBC denomination with the `ibc/` prefix may now be passed in.