perf!: Add HasAccount to the AuthKeeper to save protobuf decoding time

CHANGELOG.md

@@ -48,6 +48,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### API Breaking Changes
 
+* [\#10022](https://github.com/cosmos/cosmos-sdk/pull/10022) `AuthKeeper` interface in `x/auth` now includes a function `HasAccount`.
 * [\#9759](https://github.com/cosmos/cosmos-sdk/pull/9759) `NewAccountKeeeper` in `x/auth` now takes an additional `bech32Prefix` argument that represents `sdk.Bech32MainPrefix`.
 * [\#9628](https://github.com/cosmos/cosmos-sdk/pull/9628) Rename `x/{mod}/legacy` to `x/{mod}/migrations`.
 * [\#9571](https://github.com/cosmos/cosmos-sdk/pull/9571) Implemented error handling for staking hooks, which now return an error on failure.
@@ -85,6 +86,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+* (x/bank) [\#10022](https://github.com/cosmos/cosmos-sdk/pull/10022) `BankKeeper.SendCoins` now takes less execution time.
 * (deps) [\#9956](https://github.com/cosmos/cosmos-sdk/pull/9956) Bump Tendermint to [v0.34.12](https://github.com/tendermint/tendermint/releases/tag/v0.34.12).
 * (cli) [\#9856](https://github.com/cosmos/cosmos-sdk/pull/9856) Overwrite `--sequence` and `--account-number` flags with default flag values when used with `offline=false` in `sign-batch` command.
 

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

@@ -25,6 +25,9 @@ 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

@@ -120,8 +120,8 @@ 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))
 		}
@@ -147,8 +147,8 @@ 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)