Cosmos Dev Series: Cosmos-SDK-based Blockchain Upgrade - app upgrades

upgrades.go

package app // upgrades.go

func (app *App) setupUpgradeHandlers(
    configurator module.Configurator,
    ...
) {
    app.UpgradeKeeper.SetUpgradeHandler(
        v2.UpgradeName,
        v2.CreateUpgradeHandler(app.mm, configurator, ...),
    )
  
    ...
  
    upgradeInfo, err := app.UpgradeKeeper.ReadUpgradeInfoFromDisk()
    if err != nil {
        panic(fmt.Errorf("failed to read upgrade info from disk: %w", err))
    }
  
    if app.UpgradeKeeper.IsSkipHeight(upgradeInfo.Height) {
        return
    }
  
    var storeUpgrades *storetypes.StoreUpgrades
    
    switch upgradeInfo.Name {
    case v2.UpgradeName:
        ...
    }
  
    if storeUpgrades != nil {
        app.SetStoreLoader(upgradetypes.UpgradeStoreLoader(upgradeInfo.Height, storeUpgrades))
    }
}