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Version: nightly

v29.0.0

Upgrade to v29.0.0​

The changes between v28.0.0 and v29.0.0 are not as significant as the changes between v0.27.0 and v28.0.0.

In v29.0.0, the Cosmos SDK version has been upgraded to 0.53.0 and IBC to v10.

Please see the Changelog for more details.

Upgrade Cosmos SDK to v0.53.0​

In order to upgrade, please navigate to the go.mod file in your blockchain directory and replace an earlier Cosmos-SDK version with v0.53.0.

-github.com/cosmos/cosmos-sdk v0.50.0
+github.com/cosmos/cosmos-sdk v0.53.0

Review the Cosmos SDK v0.53.0 release notes for changes like updated x/auth vesting or sdk.Context APIs.

If you have custom modules, test for deprecated APIs and update as needed.

Add Auth to PreBlockers​

v29 configures preblockers to include the auth module (authtypes.ModuleName) for transaction processing. Ensure this is set in your v28 scaffold.

Edit PreBlockers:

  • Open mychain/app/app_config.go.

  • Find or add the preBlockers slice. Ensure it includes authtypes.ModuleName, matching v29’s configuration:

import (
    "github.com/cosmos/cosmos-sdk/x/auth/types"
    "github.com/cosmos/cosmos-sdk/x/upgrade/types"
)

var preBlockers = []string{
    upgradetypes.ModuleName,
    authtypes.ModuleName,
    // this line is used by starport scaffolding # stargate/app/preBlockers
}

Upgrade to IBC v10​

-github.com/cosmos/ibc-go/v8 v8.5.2
+github.com/cosmos/ibc-go/v10 v10.0.0

The easiest path is copy the relevant files in the app directory from a chain scaffolded with v29 into your old v28 project, in case you did not modify anything in there.

In case you want to see the entire difference with scaffolded chains, use our "Generate Migration Difference" Tool.

Checkout the Guide To use the Gen-Mig-Diff Tool.

Then run the command

gen-mig-diffs --output temp/migration --from v28 --to v29

Now, test if your blockchain runs using Ignite v29:

Update the dependencies with:

go mod tidy

Then run the Ignite doctor to update configuration files.

ignite doctor

Now start your chain.

ignite chain serve

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