Cosmos Dev Series: Cosmos-SDK-based Blockchain Upgrade - UpgradeHandler

handler.go

package v2 // upgrades.go

func CreateUpgradeHandler(
    mm *module.Manager,
    configurator module.Configurator,
    ...
) upgradetypes.UpgradeHandler {
    return func(ctx sdk.Context, plan upgradetypes.Plan, vm module.VersionMap) (module.VersionMap, error) {
        ...
        
        return mm.RunMigrations(ctx, configurator, vm)
    }
}