perf!: Add HasAccount to the AuthKeeper to save protobuf decoding time (backport #10022)

CHANGELOG.md

@@ -44,6 +44,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (store) [#10218](https://github.com/cosmos/cosmos-sdk/pull/10218) Charge gas even when there are no entries while seeking.
 * (store) [#10247](https://github.com/cosmos/cosmos-sdk/pull/10247) Charge gas for the key length in gas meter.
 
+### API Breaking Changes
+
+* (auth) [\#10022](https://github.com/cosmos/cosmos-sdk/pull/10022) `AuthKeeper` interface in `x/auth` now includes a function `HasAccount`.
+
 ### Improvements
 
 * (store) [\#10741](https://github.com/cosmos/cosmos-sdk/pull/10741) Significantly speedup iterator creation after delete heavy workloads. Significantly improves IBC migration times.

x/auth/keeper/account.go

@@ -25,6 +25,12 @@ func (ak AccountKeeper) NewAccount(ctx sdk.Context, acc types.AccountI) types.Ac
 	return acc
 }
 
+// HasAccount implements AccountKeeperI.
+func (ak AccountKeeper) HasAccount(ctx sdk.Context, addr sdk.AccAddress) bool {
+	store := ctx.KVStore(ak.key)
+	return store.Has(types.AddressStoreKey(addr))
+}
+
 // GetAccount implements AccountKeeperI.
 func (ak AccountKeeper) GetAccount(ctx sdk.Context, addr sdk.AccAddress) types.AccountI {
 	store := ctx.KVStore(ak.key)

x/auth/keeper/keeper.go

@@ -22,6 +22,9 @@ type AccountKeeperI interface {
 	// Return a new account with the next account number. Does not save the new account to the store.
 	NewAccount(sdk.Context, types.AccountI) types.AccountI
 
+	// Check if an account exists in the store.
+	HasAccount(sdk.Context, sdk.AccAddress) bool
+
 	// Retrieve an account from the store.
 	GetAccount(sdk.Context, sdk.AccAddress) types.AccountI
 

x/auth/spec/04_keepers.md

@@ -20,6 +20,9 @@ type AccountKeeperI interface {
 	// Return a new account with the next account number. Does not save the new account to the store.
 	NewAccount(sdk.Context, types.AccountI) types.AccountI
 
+	// Check if an account exists in the store.
+	HasAccount(sdk.Context, sdk.AccAddress) bool
+
 	// Retrieve an account from the store.
 	GetAccount(sdk.Context, sdk.AccAddress) types.AccountI
 

x/bank/keeper/send.go

@@ -118,8 +118,8 @@ func (k BaseSendKeeper) InputOutputCoins(ctx sdk.Context, inputs []types.Input,
 		//
 		// NOTE: This should ultimately be removed in favor a more flexible approach
 		// such as delegated fee messages.
-		acc := k.ak.GetAccount(ctx, outAddress)
-		if acc == nil {
+		accExists := k.ak.HasAccount(ctx, outAddress)
+		if !accExists {
 			defer telemetry.IncrCounter(1, "new", "account")
 			k.ak.SetAccount(ctx, k.ak.NewAccountWithAddress(ctx, outAddress))
 		}
@@ -145,8 +145,8 @@ func (k BaseSendKeeper) SendCoins(ctx sdk.Context, fromAddr sdk.AccAddress, toAd
 	//
 	// NOTE: This should ultimately be removed in favor a more flexible approach
 	// such as delegated fee messages.
-	acc := k.ak.GetAccount(ctx, toAddr)
-	if acc == nil {
+	accExists := k.ak.HasAccount(ctx, toAddr)
+	if !accExists {
 		defer telemetry.IncrCounter(1, "new", "account")
 		k.ak.SetAccount(ctx, k.ak.NewAccountWithAddress(ctx, toAddr))
 	}

x/bank/types/expected_keepers.go

@@ -13,6 +13,7 @@ type AccountKeeper interface {
 
 	GetAccount(ctx sdk.Context, addr sdk.AccAddress) types.AccountI
 	GetAllAccounts(ctx sdk.Context) []types.AccountI
+	HasAccount(ctx sdk.Context, addr sdk.AccAddress) bool
 	SetAccount(ctx sdk.Context, acc types.AccountI)
 
 	IterateAccounts(ctx sdk.Context, process func(types.AccountI) bool)