###### tags: `Testing`

# Test #8865 and Upgrade

The following test uses SimApp to test the fix for [#8865](https://github.com/cosmos/cosmos-sdk/pull/8865) after successful upgrade.

---

change to `release/v0.42.x`

build binary

./build/simd init test --chain-id test

nano ~/.simapp/config/genesis.json

update voting period to 20s

./build/simd add-genesis-account test1 5000000000stake

./build/simd gentx test1 1000000stake --chain-id test

./build/simd collect-gentxs

./build/simd start

...

./build/simd config chain-id test

./build/simd tx vesting create-vesting-account cosmos1nvuh4zpvan05qxj9746veyy2vr7l2n00y9nd5q 300stake 1624349030 --from test1 --broadcast-mode block --yes

./build/simd tx bank send cosmos1yunqnxp3ct0fr0p74awxu5f9vwf5uq9k9sg9yf cosmos1nvuh4zpvan05qxj9746veyy2vr7l2n00y9nd5q 10stake --broadcast-mode block --yes

./build/simd tx staking delegate cosmosvaloper1yunqnxp3ct0fr0p74awxu5f9vwf5uq9kqyusg6 300stake --from test2  --broadcast-mode block --yes

./build/simd tx bank send cosmos1nvuh4zpvan05qxj9746veyy2vr7l2n00y9nd5q cosmos1yunqnxp3ct0fr0p74awxu5f9vwf5uq9k9sg9yf 1stake --broadcast-mode block --yes

confirm panic

./build/simd tx gov submit-proposal software-upgrade v0.43 --title upgrade --description upgrade --upgrade-height 25 --from test1 --broadcast-mode block --yes

./build/simd tx gov deposit 1 10000000stake --from test1 --broadcast-mode block --yes

./build/simd tx gov vote 1 yes --from test1 --broadcast-mode block --yes

./build/simd tx gov vote 1 yes --from test2 --broadcast-mode block --yes

confirm chain halts

change to `v0.43.0-beta1`

add the following to simapp/app.go starting on line 260:

	app.registerUpgradeHandlers()

add the following to simapp/app.go starting on line 420 (or anywhere in file):

func (app *SimApp) registerUpgradeHandlers() {
	app.UpgradeKeeper.SetUpgradeHandler("v0.43", func(ctx sdk.Context, plan upgradetypes.Plan, _ module.VersionMap) (module.VersionMap, error) {
		// 1st-time running in-store migrations, using 1 as fromVersion to
		// avoid running InitGenesis.
		fromVM := map[string]uint64{
			"auth":         1,
			"bank":         1,
			"capability":   1,
			"crisis":       1,
			"distribution": 1,
			"evidence":     1,
			"gov":          1,
			"mint":         1,
			"params":       1,
			"slashing":     1,
			"staking":      1,
			"upgrade":      1,
			"vesting":      1,
			"ibc":          1,
			"genutil":      1,
			"transfer":     1,
		}

		return app.mm.RunMigrations(ctx, app.configurator, fromVM)
	})

	upgradeInfo, err := app.UpgradeKeeper.ReadUpgradeInfoFromDisk()
	if err != nil {
		panic(err)
	}

	if upgradeInfo.Name == "v0.43" && !app.UpgradeKeeper.IsSkipHeight(upgradeInfo.Height) {
		storeUpgrades := storetypes.StoreUpgrades{
			Added: []string{"authz", "feegrant"},
		}

		// configure store loader that checks if version == upgradeHeight and applies store upgrades
		app.SetStoreLoader(upgradetypes.UpgradeStoreLoader(upgradeInfo.Height, &storeUpgrades))
	}
}

add `storetypes` to imports

	storetypes "github.com/cosmos/cosmos-sdk/store/types"

update `x/staking/legacy/v043/store.go` ([aleem's fix](https://github.com/cosmos/cosmos-sdk/commit/fbb50cfa0a43) not yet merged)

func migrateParamsStore(ctx sdk.Context, paramstore paramtypes.Subspace) {
	if paramstore.HasKeyTable() {
		paramstore.Set(ctx, types.KeyPowerReduction, sdk.DefaultPowerReduction)
	} else {
		paramstore.WithKeyTable(types.ParamKeyTable())
		paramstore.Set(ctx, types.KeyPowerReduction, sdk.DefaultPowerReduction)
	}
}

build binary

./build/simd start

./build/simd tx bank send cosmos1nvuh4zpvan05qxj9746veyy2vr7l2n00y9nd5q cosmos1yunqnxp3ct0fr0p74awxu5f9vwf5uq9k9sg9yf 1stake --broadcast-mode block --yes

confirm no panic