Merge pull request #1950 from nspcc-dev/nep11/data

*: add `data` to NEP11 Transfer

cli/nep11_test.go

@@ -4,11 +4,13 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"math/big"
 	"os"
 	"path"
 	"testing"
 
 	"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
+	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/encoding/address"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
@@ -267,16 +269,51 @@ func TestNEP11_OwnerOf_BalanceOf_Transfer(t *testing.T) {
 	// transfer: no id specified
 	e.In.WriteString(nftOwnerPass + "\r")
 	e.RunWithError(t, cmdTransfer...)
-	cmdTransfer = append(cmdTransfer, "--id", string(tokenID))
 
 	// transfer: good
 	e.In.WriteString(nftOwnerPass + "\r")
-	e.Run(t, cmdTransfer...)
+	e.Run(t, append(cmdTransfer, "--id", string(tokenID))...)
 	e.checkTxPersisted(t)
 
 	// check balance after transfer
 	e.Run(t, append(cmdCheckBalance, "--token", h.StringLE())...)
 	checkBalanceResult(t, nftOwnerAddr, "1") // tokenID1
+
+	// transfer: good, to NEP11-Payable contract, with data
+	verifyH := deployVerifyContract(t, e)
+	cmdTransfer = []string{
+		"neo-go", "wallet", "nep11", "transfer",
+		"--rpc-endpoint", "http://" + e.RPC.Addr,
+		"--wallet", wall,
+		"--to", verifyH.StringLE(),
+		"--from", nftOwnerAddr,
+		"--token", h.StringLE(),
+		"--id", string(tokenID1),
+		"string:some_data",
+	}
+	e.In.WriteString(nftOwnerPass + "\r")
+	e.Run(t, cmdTransfer...)
+	tx, _ := e.checkTxPersisted(t)
+	// check OnNEP11Payment event
+	aer, err := e.Chain.GetAppExecResults(tx.Hash(), trigger.Application)
+	require.NoError(t, err)
+	require.Equal(t, 2, len(aer[0].Events))
+	nftOwnerHash, err := address.StringToUint160(nftOwnerAddr)
+	require.NoError(t, err)
+	require.Equal(t, state.NotificationEvent{
+		ScriptHash: verifyH,
+		Name:       "OnNEP11Payment",
+		Item: stackitem.NewArray([]stackitem.Item{
+			stackitem.NewByteArray(nftOwnerHash.BytesBE()),
+			stackitem.NewBigInteger(big.NewInt(1)),
+			stackitem.NewByteArray(tokenID1),
+			stackitem.NewByteArray([]byte("some_data")),
+		}),
+	}, aer[0].Events[1])
+
+	// check balance after transfer
+	e.Run(t, append(cmdCheckBalance, "--token", h.StringLE())...)
+	checkBalanceResult(t, nftOwnerAddr, "0")
 }
 
 func deployNFTContract(t *testing.T, e *executor) util.Uint160 {

cli/nep17_test.go

@@ -86,7 +86,7 @@ func TestNEP17Balance(t *testing.T) {
 		}
 
 		e.checkNextLine(t, "^\\s*$")
-		addr4, err := address.StringToUint160("NTe3yHH5zsaEGvEHTsFRpCjTef6Aod4yb6") // deployed verify.go contract
+		addr4, err := address.StringToUint160("NaZjSxmRZ4ErG2QEXCQMjjJfvAxMPiutmi") // deployed verify.go contract
 		require.NoError(t, err)
 		e.checkNextLine(t, "^Account "+address.Uint160ToString(addr4))
 		e.checkEOF(t)

cli/testdata/verify.go

@@ -1,6 +1,9 @@
 package testdata
 
-import "github.com/nspcc-dev/neo-go/pkg/interop"
+import (
+	"github.com/nspcc-dev/neo-go/pkg/interop"
+	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
+)
 
 func Verify() bool {
 	return true
@@ -8,3 +11,10 @@ func Verify() bool {
 
 func OnNEP17Payment(from interop.Hash160, amount int, data interface{}) {
 }
+
+// OnNEP11Payment notifies about NEP11 payment. You don't call this method directly,
+// instead it's called by NEP11 contract when you transfer funds from your address
+// to the address of this NFT contract.
+func OnNEP11Payment(from interop.Hash160, amount int, token []byte, data interface{}) {
+	runtime.Notify("OnNEP11Payment", from, amount, token, data)
+}

cli/testdata/verify.yml

@@ -1 +1,12 @@
 name: Test verify
+Events:
+  - name: OnNEP11Payment
+    parameters:
+      - name: from
+        type: Hash160
+      - name: amount
+        type: Integer
+      - name: tokenId
+        type: ByteArray
+      - name: data
+        type: Any

cli/testdata/wallet1_solo.json

@@ -1,84 +1,84 @@
 {
-  "version": "3.0",
-  "accounts": [
+  "scrypt" : {
+    "r" : 8,
+    "p" : 8,
+    "n" : 16384
+  },
+  "version" : "3.0",
+  "accounts" : [
     {
-      "address": "NTh9TnZTstvAePEYWDGLLxidBikJE24uTo",
-      "key": "6PYL8Gnjsz4RBKX18jx5ZAQTDH7PKkZwEVjPKEkjNzCDNFE6TKZwaFLibL",
-      "label": "",
-      "contract": {
-        "script": "DCECs2Ir9AF73+MXxYrtX0x1PyBrfbiWBG+n13S7xL9/jcJBdHR2qg==",
-        "parameters": [
+      "address" : "NTh9TnZTstvAePEYWDGLLxidBikJE24uTo",
+      "label" : "",
+      "lock" : false,
+      "contract" : {
+        "parameters" : [
           {
-            "name": "parameter0",
-            "type": "Signature"
+            "type" : "Signature",
+            "name" : "parameter0"
           }
         ],
-        "deployed": false
+        "script" : "DCECs2Ir9AF73+MXxYrtX0x1PyBrfbiWBG+n13S7xL9/jcJBdHR2qg==",
+        "deployed" : false
       },
-      "lock": false,
-      "isdefault": true
+      "isdefault" : true,
+      "key" : "6PYL8Gnjsz4RBKX18jx5ZAQTDH7PKkZwEVjPKEkjNzCDNFE6TKZwaFLibL"
     },
     {
-      "address": "NgEisvCqr2h8wpRxQb7bVPWUZdbVCY8Uo6",
-      "key": "6PYL8Gnjsz4RBKX18jx5ZAQTDH7PKkZwEVjPKEkjNzCDNFE6TKZwaFLibL",
-      "label": "",
-      "contract": {
-        "script": "EwwhAhA6f33QFlWFl/eWDSfFFqQ5T9loueZRVetLAT5AQEBuDCECp7xV/oaE4BGXaNEEujB5W9zIZhnoZK3SYVZyPtGFzWIMIQKzYiv0AXvf4xfFiu1fTHU/IGt9uJYEb6fXdLvEv3+NwgwhA9kMB99j5pDOd5EuEKtRrMlEtmhgI3tgjE+PgwnnHuaZFEF7zmyl",
-        "parameters": [
+      "label" : "",
+      "address" : "NgEisvCqr2h8wpRxQb7bVPWUZdbVCY8Uo6",
+      "isdefault" : false,
+      "key" : "6PYL8Gnjsz4RBKX18jx5ZAQTDH7PKkZwEVjPKEkjNzCDNFE6TKZwaFLibL",
+      "contract" : {
+        "parameters" : [
           {
-            "name": "parameter0",
-            "type": "Signature"
+            "name" : "parameter0",
+            "type" : "Signature"
           },
           {
-            "name": "parameter1",
-            "type": "Signature"
+            "type" : "Signature",
+            "name" : "parameter1"
           },
           {
-            "name": "parameter2",
-            "type": "Signature"
+            "type" : "Signature",
+            "name" : "parameter2"
           }
         ],
-        "deployed": false
+        "deployed" : false,
+        "script" : "EwwhAhA6f33QFlWFl/eWDSfFFqQ5T9loueZRVetLAT5AQEBuDCECp7xV/oaE4BGXaNEEujB5W9zIZhnoZK3SYVZyPtGFzWIMIQKzYiv0AXvf4xfFiu1fTHU/IGt9uJYEb6fXdLvEv3+NwgwhA9kMB99j5pDOd5EuEKtRrMlEtmhgI3tgjE+PgwnnHuaZFEF7zmyl"
       },
-      "lock": false,
-      "isdefault": false
+      "lock" : false
     },
     {
-      "address": "NNudMSGzEoktFzdYGYoNb3bzHzbmM1genF",
-      "key": "6PYL8Gnjsz4RBKX18jx5ZAQTDH7PKkZwEVjPKEkjNzCDNFE6TKZwaFLibL",
-      "label": "",
-      "contract": {
-        "script": "EQwhArNiK/QBe9/jF8WK7V9MdT8ga324lgRvp9d0u8S/f43CEUF7zmyl",
-        "parameters": [
-          {
-            "name": "parameter0",
-            "type": "Signature"
-          }
-        ],
-        "deployed": false
-      },
-      "lock": false,
-      "isdefault": false
-    },
-    {
-      "address" : "NTe3yHH5zsaEGvEHTsFRpCjTef6Aod4yb6",
-      "key" : "6PYSgdjUPVjo3ZJLg2CsheXnEZzyvUuSm4jCtXP6X7FT82sAQHWt2wpu5A",
+      "address" : "NNudMSGzEoktFzdYGYoNb3bzHzbmM1genF",
       "label" : "",
       "contract" : {
-        "script" : "VwEAEdsgQFcAA0A=",
-        "deployed" : true,
-        "parameters" : []
+        "parameters" : [
+          {
+            "name" : "parameter0",
+            "type" : "Signature"
+          }
+        ],
+        "deployed" : false,
+        "script" : "EQwhArNiK/QBe9/jF8WK7V9MdT8ga324lgRvp9d0u8S/f43CEUF7zmyl"
       },
       "lock" : false,
-      "isdefault" : false
+      "isdefault" : false,
+      "key" : "6PYL8Gnjsz4RBKX18jx5ZAQTDH7PKkZwEVjPKEkjNzCDNFE6TKZwaFLibL"
+    },
+    {
+      "contract" : {
+        "parameters" : [],
+        "script" : "VwEAEdsgQFcAA0BXAQR4eXp7VBTAcAwOT25ORVAxMVBheW1lbnRoUEGVAW9hIUA=",
+        "deployed" : true
+      },
+      "lock" : false,
+      "isdefault" : false,
+      "key" : "6PYVxVpeNjxGDFTTG61ARGy6mCz6fQsGm9qW2tsFW3ox1zM6KpCoWSE4PB",
+      "address" : "NaZjSxmRZ4ErG2QEXCQMjjJfvAxMPiutmi",
+      "label" : "acc"
     }
   ],
-  "scrypt": {
-    "n": 16384,
-    "r": 8,
-    "p": 8
-  },
-  "extra": {
-    "Tokens": null
+  "extra" : {
+    "Tokens" : null
   }
-}
+}

cli/wallet/nep11.go

@@ -80,7 +80,7 @@ func newNEP11Commands() []cli.Command {
 		{
 			Name:      "transfer",
 			Usage:     "transfer NEP11 tokens",
-			UsageText: "transfer --wallet <path> --rpc-endpoint <node> --timeout <time> --from <addr> --to <addr> --token <hash-or-name> --id <token-id> [--amount string] [-- <cosigner1:Scope> [<cosigner2> [...]]]",
+			UsageText: "transfer --wallet <path> --rpc-endpoint <node> --timeout <time> --from <addr> --to <addr> --token <hash-or-name> --id <token-id> [--amount string] [data] [-- <cosigner1:Scope> [<cosigner2> [...]]]",
 			Action:    transferNEP11,
 			Flags:     transferFlags,
 			Description: `Transfers specified NEP11 token with optional cosigners list attached to 
@@ -235,7 +235,7 @@ func transferNEP11(ctx *cli.Context) error {
 	return transferNEP(ctx, manifest.NEP11StandardName)
 }
 
-func signAndSendNEP11Transfer(ctx *cli.Context, c *client.Client, acc *wallet.Account, token, to util.Uint160, tokenID string, amount *big.Int, cosigners []client.SignerAccount) error {
+func signAndSendNEP11Transfer(ctx *cli.Context, c *client.Client, acc *wallet.Account, token, to util.Uint160, tokenID string, amount *big.Int, data interface{}, cosigners []client.SignerAccount) error {
 	gas := flags.Fixed8FromContext(ctx, "gas")
 
 	var (
@@ -247,9 +247,9 @@ func signAndSendNEP11Transfer(ctx *cli.Context, c *client.Client, acc *wallet.Ac
 		if err != nil {
 			return cli.NewExitError(fmt.Errorf("bad account address: %w", err), 1)
 		}
-		tx, err = c.CreateNEP11TransferTx(acc, token, int64(gas), cosigners, from, to, amount, tokenID)
+		tx, err = c.CreateNEP11TransferTx(acc, token, int64(gas), cosigners, from, to, amount, tokenID, data)
 	} else {
-		tx, err = c.CreateNEP11TransferTx(acc, token, int64(gas), cosigners, to, tokenID)
+		tx, err = c.CreateNEP11TransferTx(acc, token, int64(gas), cosigners, to, tokenID, data)
 	}
 	if err != nil {
 		return cli.NewExitError(err, 1)

cli/wallet/nep17.go

@@ -549,13 +549,13 @@ func transferNEP(ctx *cli.Context, standard string) error {
 			return cli.NewExitError(errors.New("token ID should be specified"), 1)
 		}
 		if amountArg == "" {
-			return signAndSendNEP11Transfer(ctx, c, acc, token.Hash, to, tokenID, nil, cosignersAccounts)
+			return signAndSendNEP11Transfer(ctx, c, acc, token.Hash, to, tokenID, nil, data, cosignersAccounts)
 		}
 		amount, err := fixedn.FromString(amountArg, int(token.Decimals))
 		if err != nil {
 			return cli.NewExitError(fmt.Errorf("invalid amount: %w", err), 1)
 		}
-		return signAndSendNEP11Transfer(ctx, c, acc, token.Hash, to, tokenID, amount, cosignersAccounts)
+		return signAndSendNEP11Transfer(ctx, c, acc, token.Hash, to, tokenID, amount, data, cosignersAccounts)
 	default:
 		return cli.NewExitError(fmt.Errorf("unsupported token standard %s", standard), 1)
 	}

examples/nft-nd/nft.go

@@ -181,10 +181,9 @@ func OwnerOf(token []byte) interop.Hash160 {
 	return getOwnerOf(ctx, token)
 }
 
-// Transfer token from its owner to another user, notice that it only has two
-// parameters because token owner can be deduced from token ID itself and RC1
-// implementation doesn't yet have 'data' parameter as in NEP-17 Transfer.
-func Transfer(to interop.Hash160, token []byte) bool {
+// Transfer token from its owner to another user, notice that it only has three
+// parameters because token owner can be deduced from token ID itself.
+func Transfer(to interop.Hash160, token []byte, data interface{}) bool {
 	if len(to) != 20 {
 		panic("invalid 'to' address")
 	}
@@ -212,15 +211,15 @@ func Transfer(to interop.Hash160, token []byte) bool {
 		setTokensOf(ctx, to, toksTo)
 		setOwnerOf(ctx, token, to)
 	}
-	postTransfer(owner, to, token)
+	postTransfer(owner, to, token, data)
 	return true
 }
 
 // postTransfer emits Transfer event and calls onNEP11Payment if needed.
-func postTransfer(from interop.Hash160, to interop.Hash160, token []byte) {
+func postTransfer(from interop.Hash160, to interop.Hash160, token []byte, data interface{}) {
 	runtime.Notify("Transfer", from, to, 1, token)
 	if management.GetContract(to) != nil {
-		contract.Call(to, "onNEP11Payment", contract.All, from, 1, token)
+		contract.Call(to, "onNEP11Payment", contract.All, from, 1, token, data)
 	}
 }
 
@@ -259,7 +258,7 @@ func OnNEP17Payment(from interop.Hash160, amount int, data interface{}) {
 	total++
 	storage.Put(ctx, []byte(totalSupplyPrefix), total)
 
-	postTransfer(nil, from, []byte(token))
+	postTransfer(nil, from, []byte(token), nil) // no `data` during minting
 }
 
 // Verify allows owner to manage contract's address, including earned GAS

pkg/compiler/compiler_test.go

@@ -108,13 +108,13 @@ func TestOnPayableChecks(t *testing.T) {
 	t.Run("NEP-11, good", func(t *testing.T) {
 		src := `package payable
 		import "github.com/nspcc-dev/neo-go/pkg/interop"
-		func OnNEP11Payment(from interop.Hash160, amount int, tokenID []byte) {}`
+		func OnNEP11Payment(from interop.Hash160, amount int, tokenID []byte, data interface{}) {}`
 		require.NoError(t, compileAndCheck(t, src))
 	})
 	t.Run("NEP-11, bad", func(t *testing.T) {
 		src := `package payable
 		import "github.com/nspcc-dev/neo-go/pkg/interop"
-		func OnNEP11Payment(from interop.Hash160, amount int, oldParam string, tokenID []byte) {}`
+		func OnNEP11Payment(from interop.Hash160, amount int, oldParam string, tokenID []byte, data interface{}) {}`
 		require.Error(t, compileAndCheck(t, src))
 	})
 	t.Run("NEP-17, good", func(t *testing.T) {

pkg/compiler/native_test.go

@@ -169,7 +169,7 @@ func TestNativeHelpersCompile(t *testing.T) {
 		{"properties", []string{`"neo.com"`}},
 		{"tokens", nil},
 		{"tokensOf", []string{u160}},
-		{"transfer", []string{u160, `"neo.com"`}},
+		{"transfer", []string{u160, `"neo.com"`, "nil"}},
 
 		// name service
 		{"addRoot", []string{`"com"`}},

pkg/core/interop_system_test.go

@@ -319,7 +319,7 @@ func getTestContractState(bc *Blockchain) (*state.Contract, *state.Contract) {
 	emit.Opcodes(w.BinWriter, opcode.RET)
 	onNEP11PaymentOff := w.Len()
 	emit.Syscall(w.BinWriter, interopnames.SystemRuntimeGetCallingScriptHash)
-	emit.Int(w.BinWriter, 4)
+	emit.Int(w.BinWriter, 5)
 	emit.Opcodes(w.BinWriter, opcode.PACK)
 	emit.String(w.BinWriter, "LostPayment")
 	emit.Syscall(w.BinWriter, interopnames.SystemRuntimeNotify)
@@ -454,6 +454,7 @@ func getTestContractState(bc *Blockchain) (*state.Contract, *state.Contract) {
 				manifest.NewParameter("from", smartcontract.Hash160Type),
 				manifest.NewParameter("amount", smartcontract.IntegerType),
 				manifest.NewParameter("tokenid", smartcontract.ByteArrayType),
+				manifest.NewParameter("data", smartcontract.AnyType),
 			},
 			ReturnType: smartcontract.VoidType,
 		},

pkg/core/native/nonfungible.go

@@ -107,7 +107,8 @@ func newNonFungible(name string, id int32, symbol string, decimals byte) *nonfun
 
 	desc = newDescriptor("transfer", smartcontract.BoolType,
 		manifest.NewParameter("to", smartcontract.Hash160Type),
-		manifest.NewParameter("tokenId", smartcontract.ByteArrayType))
+		manifest.NewParameter("tokenId", smartcontract.ByteArrayType),
+		manifest.NewParameter("data", smartcontract.AnyType))
 	md = newMethodAndPrice(n.transfer, 1<<17, callflag.States|callflag.AllowNotify)
 	md.StorageFee = 50
 	n.AddMethod(md, desc)
@@ -267,10 +268,10 @@ func (n *nonfungible) mint(ic *interop.Context, s nftTokenState) {
 	ts := n.TotalSupply(ic.DAO)
 	ts.Add(ts, intOne)
 	n.setTotalSupply(ic.DAO, ts)
-	n.postTransfer(ic, nil, &owner, s.ID())
+	n.postTransfer(ic, nil, &owner, s.ID(), stackitem.Null{})
 }
 
-func (n *nonfungible) postTransfer(ic *interop.Context, from, to *util.Uint160, tokenID []byte) {
+func (n *nonfungible) postTransfer(ic *interop.Context, from, to *util.Uint160, tokenID []byte, data stackitem.Item) {
 	ne := state.NotificationEvent{
 		ScriptHash: n.Hash,
 		Name:       "Transfer",
@@ -298,6 +299,7 @@ func (n *nonfungible) postTransfer(ic *interop.Context, from, to *util.Uint160,
 		fromArg,
 		stackitem.NewBigInteger(intOne),
 		stackitem.NewByteArray(tokenID),
+		data,
 	}
 	if err := contract.CallFromNative(ic, n.Hash, cs, manifest.MethodOnNEP11Payment, args, false); err != nil {
 		panic(err)
@@ -332,7 +334,7 @@ func (n *nonfungible) burnByKey(ic *interop.Context, key []byte) {
 	ts := n.TotalSupply(ic.DAO)
 	ts.Sub(ts, intOne)
 	n.setTotalSupply(ic.DAO, ts)
-	n.postTransfer(ic, &owner, nil, id)
+	n.postTransfer(ic, &owner, nil, id, stackitem.Null{})
 }
 
 func (n *nonfungible) transfer(ic *interop.Context, args []stackitem.Item) stackitem.Item {
@@ -373,7 +375,7 @@ func (n *nonfungible) transfer(ic *interop.Context, args []stackitem.Item) stack
 		acc.Add(tokenID)
 		n.putAccountState(ic.DAO, key, acc)
 	}
-	n.postTransfer(ic, &from, &to, tokenID)
+	n.postTransfer(ic, &from, &to, tokenID, args[2])
 	return stackitem.NewBool(true)
 }
 

pkg/core/native_name_service_test.go

@@ -270,11 +270,11 @@ func TestTransfer(t *testing.T) {
 	testNameServiceInvokeAux(t, bc, defaultNameServiceSysfee, from, "setRecord", stackitem.Null{},
 		"neo.com", int64(nnsrecords.A), "1.2.3.4")
 	testNameServiceInvokeAux(t, bc, defaultRegisterSysfee, from, "transfer",
-		nil, to.Contract.ScriptHash().BytesBE(), []byte("not.exists"))
+		nil, to.Contract.ScriptHash().BytesBE(), []byte("not.exists"), nil)
 	testNameServiceInvokeAux(t, bc, defaultRegisterSysfee, true, "transfer",
-		false, to.Contract.ScriptHash().BytesBE(), []byte("neo.com"))
+		false, to.Contract.ScriptHash().BytesBE(), []byte("neo.com"), nil)
 	testNameServiceInvokeAux(t, bc, defaultRegisterSysfee, from, "transfer",
-		true, to.Contract.ScriptHash().BytesBE(), []byte("neo.com"))
+		true, to.Contract.ScriptHash().BytesBE(), []byte("neo.com"), nil)
 	testNameServiceInvokeAux(t, bc, defaultNameServiceSysfee, from, "totalSupply", 1)
 	testNameServiceInvokeAux(t, bc, defaultNameServiceSysfee, from, "ownerOf",
 		to.Contract.ScriptHash().BytesBE(), []byte("neo.com"))
@@ -282,9 +282,9 @@ func TestTransfer(t *testing.T) {
 	require.NoError(t, bc.contracts.Management.PutContractState(bc.dao, cs))
 	require.NoError(t, bc.contracts.Management.PutContractState(bc.dao, cs2))
 	testNameServiceInvokeAux(t, bc, defaultRegisterSysfee, to, "transfer",
-		nil, cs2.Hash.BytesBE(), []byte("neo.com"))
+		nil, cs2.Hash.BytesBE(), []byte("neo.com"), nil)
 	testNameServiceInvokeAux(t, bc, defaultRegisterSysfee, to, "transfer",
-		true, cs.Hash.BytesBE(), []byte("neo.com"))
+		true, cs.Hash.BytesBE(), []byte("neo.com"), nil)
 	testNameServiceInvokeAux(t, bc, defaultNameServiceSysfee, from, "totalSupply", 1)
 	testNameServiceInvokeAux(t, bc, defaultNameServiceSysfee, from, "ownerOf",
 		cs.Hash.BytesBE(), []byte("neo.com"))

pkg/interop/native/nameservice/name_service.go

@@ -67,9 +67,9 @@ func TokensOf(addr interop.Hash160) iterator.Iterator {
 }
 
 // Transfer represents `transfer` method of NameService native contract.
-func Transfer(to interop.Hash160, tokenID string) bool {
+func Transfer(to interop.Hash160, tokenID string, data interface{}) bool {
 	return contract.Call(interop.Hash160(Hash), "transfer",
-		contract.ReadStates|contract.States|contract.AllowNotify, to, tokenID).(bool)
+		contract.ReadStates|contract.States|contract.AllowNotify, to, tokenID, data).(bool)
 }
 
 // AddRoot represents `addRoot` method of NameService native contract.

pkg/rpc/client/nep11.go

@@ -45,11 +45,11 @@ func (c *Client) NEP11TokenInfo(tokenHash util.Uint160) (*wallet.Token, error) {
 // on a given token to move the whole NEP11 token with the specified token ID to
 // given account and sends it to the network returning just a hash of it.
 func (c *Client) TransferNEP11(acc *wallet.Account, to util.Uint160,
-	tokenHash util.Uint160, tokenID string, gas int64, cosigners []SignerAccount) (util.Uint256, error) {
+	tokenHash util.Uint160, tokenID string, data interface{}, gas int64, cosigners []SignerAccount) (util.Uint256, error) {
 	if !c.initDone {
 		return util.Uint256{}, errNetworkNotInitialized
 	}
-	tx, err := c.CreateNEP11TransferTx(acc, tokenHash, gas, cosigners, to, tokenID)
+	tx, err := c.CreateNEP11TransferTx(acc, tokenHash, gas, cosigners, to, tokenID, data)
 	if err != nil {
 		return util.Uint256{}, err
 	}
@@ -62,8 +62,8 @@ func (c *Client) TransferNEP11(acc *wallet.Account, to util.Uint160,
 // of) NEP11 token with the specified token ID to given account and returns it.
 // The returned transaction is not signed. CreateNEP11TransferTx is also a
 // helper for TransferNEP11 and TransferNEP11D.
-// `args` for TransferNEP11:  to util.Uint160, tokenID string;
-// `args` for TransferNEP11D: from, to util.Uint160, amount int64, tokenID string.
+// `args` for TransferNEP11:  to util.Uint160, tokenID string, data interface{};
+// `args` for TransferNEP11D: from, to util.Uint160, amount int64, tokenID string, data interface{}.
 func (c *Client) CreateNEP11TransferTx(acc *wallet.Account, tokenHash util.Uint160,
 	gas int64, cosigners []SignerAccount, args ...interface{}) (*transaction.Transaction, error) {
 	w := io.NewBufBinWriter()
@@ -143,7 +143,7 @@ func (c *Client) NEP11NDOwnerOf(tokenHash util.Uint160, tokenID string) (util.Ui
 // (in FixedN format using contract's number of decimals) to given account and
 // sends it to the network returning just a hash of it.
 func (c *Client) TransferNEP11D(acc *wallet.Account, to util.Uint160,
-	tokenHash util.Uint160, amount int64, tokenID string, gas int64, cosigners []SignerAccount) (util.Uint256, error) {
+	tokenHash util.Uint160, amount int64, tokenID string, data interface{}, gas int64, cosigners []SignerAccount) (util.Uint256, error) {
 	if !c.initDone {
 		return util.Uint256{}, errNetworkNotInitialized
 	}
@@ -151,7 +151,7 @@ func (c *Client) TransferNEP11D(acc *wallet.Account, to util.Uint160,
 	if err != nil {
 		return util.Uint256{}, fmt.Errorf("bad account address: %w", err)
 	}
-	tx, err := c.CreateNEP11TransferTx(acc, tokenHash, gas, cosigners, from, to, amount, tokenID)
+	tx, err := c.CreateNEP11TransferTx(acc, tokenHash, gas, cosigners, from, to, amount, tokenID, data)
 	if err != nil {
 		return util.Uint256{}, err
 	}

pkg/rpc/server/client_test.go

@@ -834,7 +834,7 @@ func TestClient_NEP11(t *testing.T) {
 		require.EqualValues(t, expected, p)
 	})
 	t.Run("Transfer", func(t *testing.T) {
-		_, err := c.TransferNEP11(wallet.NewAccountFromPrivateKey(testchain.PrivateKeyByID(0)), testchain.PrivateKeyByID(1).GetScriptHash(), h, "neo.com", 0, nil)
+		_, err := c.TransferNEP11(wallet.NewAccountFromPrivateKey(testchain.PrivateKeyByID(0)), testchain.PrivateKeyByID(1).GetScriptHash(), h, "neo.com", nil, 0, nil)
 		require.NoError(t, err)
 	})
 }

pkg/smartcontract/manifest/standard/nep11.go

@@ -31,6 +31,7 @@ var nep11Base = &Standard{
 					Parameters: []manifest.Parameter{
 						{Name: "to", Type: smartcontract.Hash160Type},
 						{Name: "tokenId", Type: smartcontract.ByteArrayType},
+						{Name: "data", Type: smartcontract.AnyType},
 					},
 					ReturnType: smartcontract.BoolType,
 				},
@@ -112,6 +113,7 @@ var nep11Divisible = &Standard{
 						{Name: "to", Type: smartcontract.Hash160Type},
 						{Name: "amount", Type: smartcontract.IntegerType},
 						{Name: "tokenId", Type: smartcontract.ByteArrayType},
+						{Name: "data", Type: smartcontract.AnyType},
 					},
 					ReturnType: smartcontract.BoolType,
 				},

pkg/smartcontract/manifest/standard/payable.go

@@ -14,6 +14,7 @@ var nep11payable = &Standard{
 					{Name: "from", Type: smartcontract.Hash160Type},
 					{Name: "amount", Type: smartcontract.IntegerType},
 					{Name: "tokenid", Type: smartcontract.ByteArrayType},
+					{Name: "data", Type: smartcontract.AnyType},
 				},
 				ReturnType: smartcontract.VoidType,
 			}},