fix: revert proto changes from #12610

proto/cosmos/bank/v1beta1/tx.proto

@@ -40,13 +40,13 @@ message MsgSend {
 // MsgSendResponse defines the Msg/Send response type.
 message MsgSendResponse {}
 
-// MsgMultiSend represents a single input, multi-out send message.
+// MsgMultiSend represents an arbitrary multi-in, multi-out send message.
 message MsgMultiSend {
-  option (cosmos.msg.v1.signer) = "input";
+  option (cosmos.msg.v1.signer) = "inputs";
 
   option (gogoproto.equal) = false;
 
-  Input           input   = 1 [(gogoproto.nullable) = false];
+  repeated Input  inputs  = 1 [(gogoproto.nullable) = false];
   repeated Output outputs = 2 [(gogoproto.nullable) = false];
 }
 

x/bank/app_test.go

@@ -46,24 +46,24 @@ var (
 	sendMsg1 = types.NewMsgSend(addr1, addr2, coins)
 
 	multiSendMsg1 = &types.MsgMultiSend{
-		Input:   types.NewInput(addr1, coins),
+		Inputs:  []types.Input{types.NewInput(addr1, coins)},
 		Outputs: []types.Output{types.NewOutput(addr2, coins)},
 	}
 	multiSendMsg2 = &types.MsgMultiSend{
-		Input: types.NewInput(addr1, coins),
+		Inputs: []types.Input{types.NewInput(addr1, coins)},
 		Outputs: []types.Output{
 			types.NewOutput(addr2, halfCoins),
 			types.NewOutput(addr3, halfCoins),
 		},
 	}
 	multiSendMsg3 = &types.MsgMultiSend{
-		Input: types.NewInput(addr2, coins),
+		Inputs: []types.Input{types.NewInput(addr2, coins)},
 		Outputs: []types.Output{
 			types.NewOutput(addr1, coins),
 		},
 	}
 	multiSendMsg4 = &types.MsgMultiSend{
-		Input: types.NewInput(addr1, coins),
+		Inputs: []types.Input{types.NewInput(addr1, coins)},
 		Outputs: []types.Output{
 			types.NewOutput(moduleAccAddr, coins),
 		},

x/bank/client/cli/tx.go

@@ -131,7 +131,7 @@ When using '--dry-run' a key name cannot be used, only a bech32 address.
 				amount = coins.MulInt(totalAddrs)
 			}
 
-			msg := types.NewMsgMultiSend(types.NewInput(clientCtx.FromAddress, amount), output)
+			msg := types.NewMsgMultiSend([]types.Input{types.NewInput(clientCtx.FromAddress, amount)}, output)
 
 			return tx.GenerateOrBroadcastTxCLI(clientCtx, cmd.Flags(), msg)
 		},

x/bank/keeper/keeper_test.go

@@ -361,15 +361,14 @@ func (suite *IntegrationTestSuite) TestInputOutputNewAccount() {
 	suite.Require().Nil(app.AccountKeeper.GetAccount(ctx, addr2))
 	suite.Require().Empty(app.BankKeeper.GetAllBalances(ctx, addr2))
 
-	input := types.Input{
-		Address: addr1.String(),
-		Coins:   sdk.NewCoins(newFooCoin(30), newBarCoin(10)),
+	inputs := []types.Input{
+		{Address: addr1.String(), Coins: sdk.NewCoins(newFooCoin(30), newBarCoin(10))},
 	}
 	outputs := []types.Output{
 		{Address: addr2.String(), Coins: sdk.NewCoins(newFooCoin(30), newBarCoin(10))},
 	}
 
-	suite.Require().NoError(app.BankKeeper.InputOutputCoins(ctx, input, outputs))
+	suite.Require().NoError(app.BankKeeper.InputOutputCoins(ctx, inputs, outputs))
 
 	expected := sdk.NewCoins(newFooCoin(30), newBarCoin(10))
 	acc2Balances := app.BankKeeper.GetAllBalances(ctx, addr2)
@@ -393,9 +392,8 @@ func (suite *IntegrationTestSuite) TestInputOutputCoins() {
 	acc3 := app.AccountKeeper.NewAccountWithAddress(ctx, addr3)
 	app.AccountKeeper.SetAccount(ctx, acc3)
 
-	input := types.Input{
-		Address: addr1.String(),
-		Coins:   sdk.NewCoins(newFooCoin(60), newBarCoin(20)),
+	input := []types.Input{
+		{Address: addr1.String(), Coins: sdk.NewCoins(newFooCoin(60), newBarCoin(20))},
 	}
 	outputs := []types.Output{
 		{Address: addr2.String(), Coins: sdk.NewCoins(newFooCoin(30), newBarCoin(10))},
@@ -407,9 +405,11 @@ func (suite *IntegrationTestSuite) TestInputOutputCoins() {
 
 	suite.Require().NoError(testutil.FundAccount(app.BankKeeper, ctx, addr1, balances))
 
-	insufficientInput := types.Input{
-		Address: addr1.String(),
-		Coins:   sdk.NewCoins(newFooCoin(300), newBarCoin(100)),
+	insufficientInput := []types.Input{
+		{
+			Address: addr1.String(),
+			Coins:   sdk.NewCoins(newFooCoin(300), newBarCoin(100)),
+		},
 	}
 	insufficientOutputs := []types.Output{
 		{Address: addr2.String(), Coins: sdk.NewCoins(newFooCoin(300), newBarCoin(100))},
@@ -613,9 +613,10 @@ func (suite *IntegrationTestSuite) TestMsgMultiSendEvents() {
 	coins := sdk.NewCoins(sdk.NewInt64Coin(fooDenom, 50), sdk.NewInt64Coin(barDenom, 100))
 	newCoins := sdk.NewCoins(sdk.NewInt64Coin(fooDenom, 50))
 	newCoins2 := sdk.NewCoins(sdk.NewInt64Coin(barDenom, 100))
-	input := types.Input{
-		Address: addr.String(),
-		Coins:   coins,
+	input := []types.Input{
+		{Address: addr.String(),
+			Coins: coins,
+		},
 	}
 	outputs := []types.Output{
 		{Address: addr3.String(), Coins: newCoins},

x/bank/keeper/msg_server.go

@@ -76,8 +76,10 @@ func (k msgServer) MultiSend(goCtx context.Context, msg *types.MsgMultiSend) (*t
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
 	// NOTE: totalIn == totalOut should already have been checked
-	if err := k.IsSendEnabledCoins(ctx, msg.Input.Coins...); err != nil {
-		return nil, err
+	for _, in := range msg.Inputs {
+		if err := k.IsSendEnabledCoins(ctx, in.Coins...); err != nil {
+			return nil, err
+		}
 	}
 
 	for _, out := range msg.Outputs {
@@ -88,7 +90,7 @@ func (k msgServer) MultiSend(goCtx context.Context, msg *types.MsgMultiSend) (*t
 		}
 	}
 
-	err := k.InputOutputCoins(ctx, msg.Input, msg.Outputs)
+	err := k.InputOutputCoins(ctx, msg.Inputs, msg.Outputs)
 	if err != nil {
 		return nil, err
 	}

x/bank/keeper/send.go

@@ -18,7 +18,7 @@ import (
 type SendKeeper interface {
 	ViewKeeper
 
-	InputOutputCoins(ctx sdk.Context, input types.Input, outputs []types.Output) error
+	InputOutputCoins(ctx sdk.Context, inputs []types.Input, outputs []types.Output) error
 	SendCoins(ctx sdk.Context, fromAddr sdk.AccAddress, toAddr sdk.AccAddress, amt sdk.Coins) error
 
 	GetParams(ctx sdk.Context) types.Params
@@ -120,30 +120,31 @@ func (k BaseSendKeeper) SetParams(ctx sdk.Context, params types.Params) error {
 // InputOutputCoins performs multi-send functionality. It accepts a series of
 // inputs that correspond to a series of outputs. It returns an error if the
 // inputs and outputs don't line up or if any single transfer of tokens fails.
-func (k BaseSendKeeper) InputOutputCoins(ctx sdk.Context, input types.Input, outputs []types.Output) error {
+func (k BaseSendKeeper) InputOutputCoins(ctx sdk.Context, inputs []types.Input, outputs []types.Output) error {
 	// Safety check ensuring that when sending coins the keeper must maintain the
 	// Check supply invariant and validity of Coins.
-	if err := types.ValidateInputsOutputs(input, outputs); err != nil {
+	if err := types.ValidateInputsOutputs(inputs, outputs); err != nil {
 		return err
 	}
 
-	inAddress, err := sdk.AccAddressFromBech32(input.Address)
-	if err != nil {
-		return err
-	}
+	for _, in := range inputs {
+		inAddress, err := sdk.AccAddressFromBech32(in.Address)
+		if err != nil {
+			return err
+		}
 
-	err = k.subUnlockedCoins(ctx, inAddress, input.Coins)
-	if err != nil {
-		return err
+		err = k.subUnlockedCoins(ctx, inAddress, in.Coins)
+		if err != nil {
+			return err
+		}
+		ctx.EventManager().EmitEvent(
+			sdk.NewEvent(
+				sdk.EventTypeMessage,
+				sdk.NewAttribute(types.AttributeKeySender, in.Address),
+			),
+		)
 	}
 
-	ctx.EventManager().EmitEvent(
-		sdk.NewEvent(
-			sdk.EventTypeMessage,
-			sdk.NewAttribute(types.AttributeKeySender, input.Address),
-		),
-	)
-
 	for _, out := range outputs {
 		outAddress, err := sdk.AccAddressFromBech32(out.Address)
 		if err != nil {

x/bank/simulation/operations.go

@@ -176,25 +176,40 @@ func SimulateMsgMultiSend(ak types.AccountKeeper, bk keeper.Keeper) simtypes.Ope
 		r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context,
 		accs []simtypes.Account, chainID string,
 	) (simtypes.OperationMsg, []simtypes.FutureOperation, error) {
-		// random number of outputs between [1, 3]
+		// random number of inputs/outputs between [1, 3]
+		inputs := make([]types.Input, r.Intn(1)+1)
 		outputs := make([]types.Output, r.Intn(3)+1)
 
+		// collect signer privKeys
+		privs := make([]cryptotypes.PrivKey, len(inputs))
+
+		// use map to check if address already exists as input
+		usedAddrs := make(map[string]bool)
+
 		var totalSentCoins sdk.Coins
-		// generate random input fields, ignore to address
-		from, _, coins, skip := randomSendFields(r, ctx, accs, bk, ak)
+		for i := range inputs {
+			// generate random input fields, ignore to address
+			from, _, coins, skip := randomSendFields(r, ctx, accs, bk, ak)
 
-		// if coins slice is empty, we can not create valid types.MsgMultiSend
-		if len(coins) == 0 {
-			return simtypes.NoOpMsg(types.ModuleName, types.TypeMsgMultiSend, "empty coins slice"), nil, nil
-		}
+			// make sure account is fresh and not used in previous input
+			for usedAddrs[from.Address.String()] {
+				from, _, coins, skip = randomSendFields(r, ctx, accs, bk, ak)
+			}
 
-		if skip {
-			return simtypes.NoOpMsg(types.ModuleName, types.TypeMsgMultiSend, "skip all transfers"), nil, nil
-		}
+			if skip {
+				return simtypes.NoOpMsg(types.ModuleName, types.TypeMsgMultiSend, "skip all transfers"), nil, nil
+			}
 
-		// set next input and accumulate total sent coins
-		input := types.NewInput(from.Address, coins)
-		totalSentCoins = totalSentCoins.Add(coins...)
+			// set input address in used address map
+			usedAddrs[from.Address.String()] = true
+
+			// set signer privkey
+			privs[i] = from.PrivKey
+
+			// set next input and accumulate total sent coins
+			inputs[i] = types.NewInput(from.Address, coins)
+			totalSentCoins = totalSentCoins.Add(coins...)
+		}
 
 		// Check send_enabled status of each sent coin denom
 		if err := bk.IsSendEnabledCoins(ctx, totalSentCoins...); err != nil {
@@ -231,10 +246,10 @@ func SimulateMsgMultiSend(ak types.AccountKeeper, bk keeper.Keeper) simtypes.Ope
 		}
 
 		msg := &types.MsgMultiSend{
-			Input:   input,
+			Inputs:  inputs,
 			Outputs: outputs,
 		}
-		err := sendMsgMultiSend(r, app, bk, ak, msg, ctx, chainID, []cryptotypes.PrivKey{from.PrivKey})
+		err := sendMsgMultiSend(r, app, bk, ak, msg, ctx, chainID, privs)
 		if err != nil {
 			return simtypes.NoOpMsg(types.ModuleName, msg.Type(), "invalid transfers"), nil, err
 		}
@@ -249,20 +264,22 @@ func SimulateMsgMultiSendToModuleAccount(ak types.AccountKeeper, bk keeper.Keepe
 		r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context,
 		accs []simtypes.Account, chainID string,
 	) (simtypes.OperationMsg, []simtypes.FutureOperation, error) {
+		inputs := make([]types.Input, 2)
 		outputs := make([]types.Output, moduleAccCount)
-
+		// collect signer privKeys
+		privs := make([]cryptotypes.PrivKey, len(inputs))
 		var totalSentCoins sdk.Coins
-
-		sender := accs[0]
-		spendable := bk.SpendableCoins(ctx, sender.Address)
-		coins := simtypes.RandSubsetCoins(r, spendable)
-		input := types.NewInput(sender.Address, coins)
-		totalSentCoins = totalSentCoins.Add(coins...)
-
+		for i := range inputs {
+			sender := accs[i]
+			privs[i] = sender.PrivKey
+			spendable := bk.SpendableCoins(ctx, sender.Address)
+			coins := simtypes.RandSubsetCoins(r, spendable)
+			inputs[i] = types.NewInput(sender.Address, coins)
+			totalSentCoins = totalSentCoins.Add(coins...)
+		}
 		if err := bk.IsSendEnabledCoins(ctx, totalSentCoins...); err != nil {
 			return simtypes.NoOpMsg(types.ModuleName, types.TypeMsgMultiSend, err.Error()), nil, nil
 		}
-
 		moduleAccounts := getModuleAccounts(ak, ctx, moduleAccCount)
 		for i := range outputs {
 			var outCoins sdk.Coins
@@ -275,12 +292,9 @@ func SimulateMsgMultiSendToModuleAccount(ak types.AccountKeeper, bk keeper.Keepe
 				outCoins = simtypes.RandSubsetCoins(r, totalSentCoins)
 				totalSentCoins = totalSentCoins.Sub(outCoins...)
 			}
-
 			outputs[i] = types.NewOutput(moduleAccounts[i].Address, outCoins)
 		}
-
 		// remove any output that has no coins
-
 		for i := 0; i < len(outputs); {
 			if outputs[i].Coins.Empty() {
 				outputs[i] = outputs[len(outputs)-1]
@@ -290,16 +304,14 @@ func SimulateMsgMultiSendToModuleAccount(ak types.AccountKeeper, bk keeper.Keepe
 				i++
 			}
 		}
-
 		msg := &types.MsgMultiSend{
-			Input:   input,
+			Inputs:  inputs,
 			Outputs: outputs,
 		}
-		err := sendMsgMultiSend(r, app, bk, ak, msg, ctx, chainID, []cryptotypes.PrivKey{sender.PrivKey})
+		err := sendMsgMultiSend(r, app, bk, ak, msg, ctx, chainID, privs)
 		if err != nil {
 			return simtypes.NoOpMsg(types.ModuleName, msg.Type(), "invalid transfers"), nil, err
 		}
-
 		return simtypes.NewOperationMsg(msg, true, "", nil), nil, nil
 	}
 }
@@ -310,27 +322,29 @@ func sendMsgMultiSend(
 	r *rand.Rand, app *baseapp.BaseApp, bk keeper.Keeper, ak types.AccountKeeper,
 	msg *types.MsgMultiSend, ctx sdk.Context, chainID string, privkeys []cryptotypes.PrivKey,
 ) error {
-
-	addr := sdk.MustAccAddressFromBech32(msg.Input.Address)
-	acc := ak.GetAccount(ctx, addr)
-
+	accountNumbers := make([]uint64, len(msg.Inputs))
+	sequenceNumbers := make([]uint64, len(msg.Inputs))
+	for i := 0; i < len(msg.Inputs); i++ {
+		addr := sdk.MustAccAddressFromBech32(msg.Inputs[i].Address)
+		acc := ak.GetAccount(ctx, addr)
+		accountNumbers[i] = acc.GetAccountNumber()
+		sequenceNumbers[i] = acc.GetSequence()
+	}
 	var (
 		fees sdk.Coins
 		err  error
 	)
-
+	addr := sdk.MustAccAddressFromBech32(msg.Inputs[0].Address)
 	// feePayer is the first signer, i.e. first input address
 	feePayer := ak.GetAccount(ctx, addr)
 	spendable := bk.SpendableCoins(ctx, feePayer.GetAddress())
-
-	coins, hasNeg := spendable.SafeSub(msg.Input.Coins...)
+	coins, hasNeg := spendable.SafeSub(msg.Inputs[0].Coins...)
 	if !hasNeg {
 		fees, err = simtypes.RandomFees(r, ctx, coins)
 		if err != nil {
 			return err
 		}
 	}
-
 	txGen := simappparams.MakeTestEncodingConfig().TxConfig
 	tx, err := simtestutil.GenSignedMockTx(
 		r,
@@ -339,19 +353,17 @@ func sendMsgMultiSend(
 		fees,
 		simtestutil.DefaultGenTxGas,
 		chainID,
-		[]uint64{acc.GetAccountNumber()},
-		[]uint64{acc.GetSequence()},
+		accountNumbers,
+		sequenceNumbers,
 		privkeys...,
 	)
 	if err != nil {
 		return err
 	}
-
 	_, _, err = app.SimDeliver(txGen.TxEncoder(), tx)
 	if err != nil {
 		return err
 	}
-
 	return nil
 }