initialize megavault module account in 7.0.0 upgrade handler

protocol/app/upgrades.go

@@ -30,6 +30,7 @@ func (app *App) setupUpgradeHandlers() {
 		v7_0_0.CreateUpgradeHandler(
 			app.ModuleManager,
 			app.configurator,
+			app.AccountKeeper,
 			app.PricesKeeper,
 			app.VaultKeeper,
 		),

protocol/app/upgrades/v7.0.0/upgrade.go

@@ -8,6 +8,8 @@ import (
 	upgradetypes "cosmossdk.io/x/upgrade/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
+	authkeeper "github.com/cosmos/cosmos-sdk/x/auth/keeper"
+	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
 	"github.com/dydxprotocol/v4-chain/protocol/lib"
 	"github.com/dydxprotocol/v4-chain/protocol/lib/slinky"
 	pricestypes "github.com/dydxprotocol/v4-chain/protocol/x/prices/types"
@@ -20,6 +22,75 @@ const (
 	QUOTE_QUANTUMS_PER_MEGAVAULT_SHARE = 1_000_000
 )
 
+var (
+	ModuleAccsToInitialize = []string{
+		vaulttypes.MegavaultAccountName,
+	}
+)
+
+// This module account initialization logic is copied from v3.0.0 upgrade handler.
+func initializeModuleAccs(ctx sdk.Context, ak authkeeper.AccountKeeper) {
+	for _, modAccName := range ModuleAccsToInitialize {
+		// Get module account and relevant permissions from the accountKeeper.
+		addr, perms := ak.GetModuleAddressAndPermissions(modAccName)
+		if addr == nil {
+			panic(fmt.Sprintf(
+				"Did not find %v in `ak.GetModuleAddressAndPermissions`. This is not expected. Skipping.",
+				modAccName,
+			))
+		}
+
+		// Try to get the account in state.
+		acc := ak.GetAccount(ctx, addr)
+		if acc != nil {
+			// Account has been initialized.
+			macc, isModuleAccount := acc.(sdk.ModuleAccountI)
+			if isModuleAccount {
+				// Module account was correctly initialized. Skipping
+				ctx.Logger().Info(fmt.Sprintf(
+					"module account %+v was correctly initialized. No-op",
+					macc,
+				))
+				continue
+			}
+			// Module account has been initialized as a BaseAccount. Change to module account.
+			// Note: We need to get the base account to retrieve its account number, and convert it
+			// in place into a module account.
+			baseAccount, ok := acc.(*authtypes.BaseAccount)
+			if !ok {
+				panic(fmt.Sprintf(
+					"cannot cast %v into a BaseAccount, acc = %+v",
+					modAccName,
+					acc,
+				))
+			}
+			newModuleAccount := authtypes.NewModuleAccount(
+				baseAccount,
+				modAccName,
+				perms...,
+			)
+			ak.SetModuleAccount(ctx, newModuleAccount)
+			ctx.Logger().Info(fmt.Sprintf(
+				"Successfully converted %v to module account in state: %+v",
+				modAccName,
+				newModuleAccount,
+			))
+			continue
+		}
+
+		// Account has not been initialized at all. Initialize it as module.
+		// Implementation taken from
+		// https://github.com/dydxprotocol/cosmos-sdk/blob/bdf96fdd/x/auth/keeper/keeper.go#L213
+		newModuleAccount := authtypes.NewEmptyModuleAccount(modAccName, perms...)
+		maccI := (ak.NewAccount(ctx, newModuleAccount)).(sdk.ModuleAccountI) // this set the account number
+		ak.SetModuleAccount(ctx, maccI)
+		ctx.Logger().Info(fmt.Sprintf(
+			"Successfully initialized module account in state: %+v",
+			newModuleAccount,
+		))
+	}
+}
+
 func initCurrencyPairIDCache(ctx sdk.Context, k pricestypes.PricesKeeper) {
 	marketParams := k.GetAllMarketParams(ctx)
 	for _, mp := range marketParams {
@@ -126,13 +197,17 @@ func migrateVaultSharesToMegavaultShares(ctx sdk.Context, k vaultkeeper.Keeper)
 func CreateUpgradeHandler(
 	mm *module.Manager,
 	configurator module.Configurator,
+	accountKeeper authkeeper.AccountKeeper,
 	pricesKeeper pricestypes.PricesKeeper,
 	vaultKeeper vaultkeeper.Keeper,
 ) upgradetypes.UpgradeHandler {
 	return func(ctx context.Context, plan upgradetypes.Plan, vm module.VersionMap) (module.VersionMap, error) {
 		sdkCtx := lib.UnwrapSDKContext(ctx, "app/upgrades")
 		sdkCtx.Logger().Info(fmt.Sprintf("Running %s Upgrade...", UpgradeName))
 
+		// Initialize module accounts.
+		initializeModuleAccs(sdkCtx, accountKeeper)
+
 		// Initialize the currency pair ID cache for all existing market params.
 		initCurrencyPairIDCache(sdkCtx, pricesKeeper)