This guide provides instructions for migrating 08-wasm versions.
From ibc-go v7.3.x to ibc-go v8.0.x
In the 08-wasm versions compatible with ibc-go v7.3.x and above from the v7 release line, the checksums of the uploaded Wasm bytecodes are all stored under a single key. From ibc-go v8.0.x the checksums are stored using
collections.KeySet, whose full functionality became available in Cosmos SDK v0.50. There is therefore an automatic migration handler configured in the 08-wasm module to migrate the stored checksums to