[#102] nns: Support global domain

Signed-off-by: Alexander Chuprov <a.chuprov@yadro.com>

nns/config.yml

@@ -2,7 +2,7 @@ name: "NameService"
 supportedstandards: ["NEP-11"]
 safemethods: ["balanceOf", "decimals", "symbol", "totalSupply", "tokensOf", "ownerOf",
               "tokens", "properties", "roots", "getPrice", "isAvailable", "getRecords",
-              "resolve", "version"]
+              "resolve", "version","getGlobalDomain","checkAvailableGlobalDomain"]
 events:
   - name: Transfer
     parameters:

nns/nns_contract.go

@@ -69,6 +69,12 @@ const (
 	errInvalidDomainName = "invalid domain name format"
 )
 
+const (
+	// Cnametgt is a special TXT record ensuring all created subdomains point to the global domain - the value of this variable.
+	//It is guaranteed that two domains cannot point to the same global domain.
+	Cnametgt = "cnametgt"
+)
+
 // RecordState is a type that registered entities are saved to.
 type RecordState struct {
 	Name string
@@ -231,9 +237,78 @@ func IsAvailable(name string) bool {
 		return true
 	}
 	checkParentExists(ctx, fragments)
+	if !checkAvailableGlobalDomain(ctx, fragments) {
+		panic("global domain is already taken")
+	}
 	return storage.Get(ctx, append([]byte{prefixName}, getTokenKey([]byte(name))...)) == nil
 }
 
+// CheckAvailableGlobalDomain - triggers a panic if the global domain name is occupied.
+func CheckAvailableGlobalDomain(name string) {
+	fragments := splitAndCheck(name)
+	ctx := storage.GetReadOnlyContext()
+	if !checkAvailableGlobalDomain(ctx, fragments) {
+		panic("global domain is already taken")
+	}
+}
+
+func checkAvailableGlobalDomain(ctx storage.Context, fragments []string) bool {
+	globalDomain := getGlobalDomain(ctx, fragments)
+	if globalDomain == "" {
+		return true
+	}
+
+	nsBytes := storage.Get(ctx, append([]byte{prefixName}, getTokenKey([]byte(globalDomain))...))
+	if nsBytes != nil {
+		return false
+	}
+	return true
+}
+
+func GetGlobalDomain(name string) string {
+	fragments := splitAndCheck(name)
+	ctx := storage.GetReadOnlyContext()
+	return getGlobalDomain(ctx, fragments)
+}
+
+func getGlobalDomain(ctx storage.Context, fragments []string) string {
+	name := ""
+	for i := 1; i < len(fragments); i++ {
+		if name != "" {
+			name = name + "."
+		}
+		name = name + fragments[i]
+	}
+
+	if name == "" {
+		return ""
+	}
+
+	tokenID := []byte(tokenIDFromName(name))
+	records := getRecordsByType(ctx, tokenID, name, TXT)
+
+	if records == nil {
+		return ""
+	}
+
+	globalDomain := ""
+	for _, name := range records {
+		fragments := std.StringSplit(name, "=")
+		if len(fragments) != 2 {
+			continue
+		}
+
+		if fragments[0] == Cnametgt {
+			globalDomain = fragments[1]
+		}
+	}
+
+	if globalDomain == "" {
+		return ""
+	}
+	return fragments[0] + "." + globalDomain
+}
+
 // checkParentExists panics if any domain from fragments doesn't exist or is expired.
 func checkParentExists(ctx storage.Context, fragments []string) {
 	if dom := parentExpired(ctx, fragments); dom != "" {
@@ -263,12 +338,16 @@ func parentExpired(ctx storage.Context, fragments []string) string {
 	return ""
 }
 
-// Register registers a new domain with the specified owner and name if it's available.
 func Register(name string, owner interop.Hash160, email string, refresh, retry, expire, ttl int) bool {
+	ctx := storage.GetContext()
+	return register(ctx, name, owner, email, refresh, retry, expire, ttl)
+}
+
+// Register registers a new domain with the specified owner and name if it's available.
+func register(ctx storage.Context, name string, owner interop.Hash160, email string, refresh, retry, expire, ttl int) bool {
 	fragments := splitAndCheck(name)
 	l := len(fragments)
 	tldKey := append([]byte{prefixRoot}, []byte(fragments[l-1])...)
-	ctx := storage.GetContext()
 	tldBytes := storage.Get(ctx, tldKey)
 	if l == 1 {
 		checkCommittee()
@@ -325,6 +404,10 @@ func Register(name string, owner interop.Hash160, email string, refresh, retry,
 		// NNS expiration is in milliseconds
 		Expiration: int64(runtime.GetTime() + expire*1000),
 	}
+	if !checkAvailableGlobalDomain(ctx, fragments) {
+		panic("global domain is already taken")
+	}
+
 	putNameStateWithKey(ctx, tokenKey, ns)
 	putSoaRecord(ctx, name, email, refresh, retry, expire, ttl)
 	updateBalance(ctx, []byte(name), owner, +1)
@@ -332,6 +415,28 @@ func Register(name string, owner interop.Hash160, email string, refresh, retry,
 	return true
 }
 
+func DeleteDomain(name string) {
+	ctx := storage.GetContext()
+	deleteDomain(ctx, name)
+}
+
+func deleteDomain(ctx storage.Context, name string) {
+	nameKey := append([]byte{prefixName}, getTokenKey([]byte(name))...)
+	tldBytes := storage.Get(ctx, nameKey)
+	if tldBytes == nil {
+		return
+	}
+
+	tokenId := []byte(tokenIDFromName(name))
+	globalDomain := getRecordsByType(ctx, tokenId, name, CNAME)
+	if len(globalDomain) > 0 {
+		DeleteRecords(name, CNAME)
+		deleteDomain(ctx, globalDomain[0])
+	}
+	DeleteRecords(name, TXT)
+	storage.Delete(ctx, nameKey)
+}
+
 // Renew increases domain expiration date.
 func Renew(name string) int64 {
 	checkDomainNameLength(name)
@@ -427,6 +532,13 @@ func DeleteRecords(name string, typ RecordType) {
 	ns.checkAdmin()
 	recordsKey := getRecordsKeyByType(tokenID, name, typ)
 	records := storage.Find(ctx, recordsKey, storage.KeysOnly)
+
+	if typ == TXT {
+		fragments := splitAndCheck(name)
+		globalDomain := getGlobalDomain(ctx, fragments)
+		deleteDomain(ctx, globalDomain)
+	}
+
 	for iterator.Next(records) {
 		r := iterator.Value(records).(string)
 		storage.Delete(ctx, r)
@@ -574,6 +686,27 @@ func addRecord(ctx storage.Context, tokenId []byte, name string, typ RecordType,
 		}
 	}
 
+	fragments := splitAndCheck(name)
+	globalDomain := getGlobalDomain(ctx, fragments)
+	if globalDomain != "" {
+		var id byte
+		recordKey := getIdRecordKey(tokenId, string(tokenId), SOA, id)
+
+		recBytes := storage.Get(ctx, recordKey)
+		if recBytes == nil {
+			panic("no SOA record found for the global domain")
+		}
+		rec := std.Deserialize(recBytes.([]byte)).(RecordState)
+		split := std.StringSplitNonEmpty(rec.Data, " ")
+		if len(split) != 7 {
+			panic("invalid SOA record for the global domain")
+		}
+
+		register(ctx, globalDomain, OwnerOf(tokenId), split[1], std.Atoi(split[3], 10), std.Atoi(split[4], 10),
+			std.Atoi(split[5], 10), std.Atoi(split[6], 10))
+
+		putCnameRecord(ctx, name, globalDomain)
+	}
 	if typ == CNAME && id != 0 {
 		panic("you shouldn't have more than one CNAME record")
 	}
@@ -614,6 +747,21 @@ func putSoaRecord(ctx storage.Context, name, email string, refresh, retry, expir
 	storage.Put(ctx, recordKey, recBytes)
 }
 
+// putCnameRecord stores CNAME domain record.
+func putCnameRecord(ctx storage.Context, name, data string) {
+	var id byte
+	tokenId := []byte(tokenIDFromName(name))
+	recordKey := getIdRecordKey(tokenId, name, CNAME, id)
+	rs := RecordState{
+		Name: name,
+		Type: CNAME,
+		ID:   id,
+		Data: data,
+	}
+	recBytes := std.Serialize(rs)
+	storage.Put(ctx, recordKey, recBytes)
+}
+
 // updateSoaSerial stores soa domain record.
 func updateSoaSerial(ctx storage.Context, tokenId []byte) {
 	var id byte

tests/container_test.go

@@ -165,6 +165,14 @@ func checkContainerList(t *testing.T, c *neotest.ContractInvoker, expected [][]b
 	})
 }
 
+const (
+	// default SOA record field values
+	defaultRefresh = 3600                 // 1 hour
+	defaultRetry   = 600                  // 10 min
+	defaultExpire  = 3600 * 24 * 365 * 10 // 10 years
+	defaultTTL     = 3600                 // 1 hour
+)
+
 func TestContainerPut(t *testing.T) {
 	c, cBal, _ := newContainerInvoker(t)
 
@@ -233,6 +241,64 @@ func TestContainerPut(t *testing.T) {
 		})
 	})
 
+	t.Run("create global domain", func(t *testing.T) {
+		ctrNNS := neotest.CompileFile(t, c.CommitteeHash, nnsPath, path.Join(nnsPath, "config.yml"))
+		nnsHash := ctrNNS.Hash
+		cNNS := c.CommitteeInvoker(nnsHash)
+		cNNS.Invoke(t, true, "register",
+			"animals", c.CommitteeHash,
+			"whateveriwant@world.com", int64(0), int64(0), int64(100_000), int64(0))
+
+		cNNS.Invoke(t, true, "register",
+			"ns", c.CommitteeHash,
+			"whateveriwant@world.com", int64(0), int64(0), int64(100_000), int64(0))
+
+		cNNS.Invoke(t, true, "register",
+			"poland.ns", c.CommitteeHash,
+			"whateveriwant@world.com", int64(0), int64(0), int64(100_000), int64(0))
+
+		cNNS.Invoke(t, true, "register",
+			"sweden.ns", c.CommitteeHash,
+			"whateveriwant@world.com", int64(0), int64(0), int64(100_000), int64(0))
+
+		cNNS.Invoke(t, stackitem.Null{}, "addRecord",
+			"poland.ns", int64(nns.TXT), nns.Cnametgt+"=animals")
+
+		cNNS.Invoke(t, stackitem.Null{}, "addRecord", "poland.ns", int64(nns.TXT), "random-record")
+
+		cNNS.Invoke(t, stackitem.Null{}, "addRecord", "poland.ns", int64(nns.TXT), "ne-qqq=random-record2")
+		cNNS.Invoke(t, stackitem.Null{}, "addRecord", "sweden.ns", int64(nns.TXT), nns.Cnametgt+"=animals")
+
+		balanceMint(t, cBal, acc, (containerFee+containerAliasFee)*5, []byte{})
+		cNNS.Invoke(t, true, "isAvailable", "bober.animals")
+		putArgs := []any{cnt.value, cnt.sig, cnt.pub, cnt.token, "bober", "poland.ns"}
+		c3 := c.WithSigners(c.Committee, acc)
+		c3.Invoke(t, stackitem.Null{}, "putNamed", putArgs...)
+		b := c3.TopBlock(t)
+
+		expected := stackitem.NewArray([]stackitem.Item{stackitem.NewBuffer(
+			[]byte(fmt.Sprintf("bober.animals ops@frostfs.info %d %d %d %d %d",
+				b.Timestamp, defaultRefresh, defaultRetry, defaultExpire, defaultTTL)))})
+		cNNS.Invoke(t, expected, "getRecords", "bober.animals", int64(nns.SOA))
+
+		expected = stackitem.NewArray([]stackitem.Item{
+			stackitem.NewBuffer([]byte("bober.animals")),
+		})
+
+		cNNS.Invoke(t, false, "isAvailable", "bober.animals")
+
+		cNNS.Invoke(t, expected, "getRecords", "bober.poland.ns", int64(nns.CNAME))
+
+		putArgs = []any{cnt.value, cnt.sig, cnt.pub, cnt.token, "bober", "sweden.ns"}
+
+		c3.InvokeFail(t, "global domain is already taken", "putNamed", putArgs...)
+		cNNS.InvokeFail(t, "global domain is already taken", "checkAvailableGlobalDomain", "bober.poland.ns")
+
+		c3.Invoke(t, stackitem.Null{}, "delete", cnt.id[:], cnt.sig, cnt.pub, cnt.token)
+		cNNS.Invoke(t, true, "isAvailable", "bober.animals")
+		cNNS.Invoke(t, stackitem.Null{}, "checkAvailableGlobalDomain", "bober.poland.ns")
+	})
+
 	t.Run("gas costs are the same for all containers in block", func(t *testing.T) {
 		const (
 			containerPerBlock = 512

tests/nns_test.go

@@ -99,6 +99,10 @@ func TestNNSRegister(t *testing.T) {
 		"com", accTop.ScriptHash(),
 		"myemail@frostfs.info", refresh, retry, expire, ttl)
 
+	c1.Invoke(t, true, "register",
+		"globaldomain.com", accTop.ScriptHash(),
+		"myemail@frostfs.info", refresh, retry, expire, ttl)
+
 	acc := c.NewAccount(t)
 	c2 := c.WithSigners(c.Committee, acc)
 	c2.InvokeFail(t, "not witnessed by admin", "register",
@@ -157,6 +161,21 @@ func TestNNSRegister(t *testing.T) {
 		stackitem.NewByteArray([]byte("second TXT record")),
 	})
 	c.Invoke(t, expected, "getRecords", "testdomain.com", int64(nns.TXT))
+
+	c3.Invoke(t, stackitem.Null{}, "addRecord",
+		"testdomain.com", int64(nns.TXT), nns.Cnametgt+"=globaldomain.com")
+	c.Invoke(t, true, "isAvailable", "dom.testdomain.com")
+
+	c3.Invoke(t, true, "register",
+		"dom.testdomain.com", acc.ScriptHash(),
+		"myemail@frostfs.info", refresh, retry, expire, ttl)
+
+	c3.Invoke(t, stackitem.Null{}, "addRecord",
+		"dom.testdomain.com", int64(nns.TXT), "CID")
+
+	c.InvokeFail(t, "global domain is already taken", "isAvailable", "dom.testdomain.com")
+	c.Invoke(t, false, "isAvailable", "dom.globaldomain.com")
+
 }
 
 func TestTLDRecord(t *testing.T) {
@@ -365,6 +384,10 @@ func TestNNSIsAvailable(t *testing.T) {
 		"domain.com", acc.ScriptHash(),
 		"myemail@frostfs.info", refresh, retry, expire, ttl)
 
+	c1.Invoke(t, true, "register",
+		"globaldomain.com", acc.ScriptHash(),
+		"myemail@frostfs.info", refresh, retry, expire, ttl)
+
 	c.Invoke(t, false, "isAvailable", "domain.com")
 
 	c.Invoke(t, true, "isAvailable", "dom.domain.com")
@@ -376,6 +399,18 @@ func TestNNSIsAvailable(t *testing.T) {
 	c.Invoke(t, false, "isAvailable", "dom.domain.com")
 	c.Invoke(t, true, "isAvailable", "dom.dom.domain.com")
 
+	c1.Invoke(t, stackitem.Null{}, "addRecord",
+		"dom.domain.com", int64(nns.TXT), nns.Cnametgt+"=globaldomain.com")
+	c.Invoke(t, true, "isAvailable", "dom.dom.domain.com")
+	c.Invoke(t, stackitem.Null{}, "checkAvailableGlobalDomain", "dom.domain.com")
+
+	c1.Invoke(t, true, "register",
+		"dom.globaldomain.com", acc.ScriptHash(),
+		"myemail@frostfs.info", refresh, retry, expire, ttl)
+
+	c.InvokeFail(t, "global domain is already taken", "isAvailable", "dom.dom.domain.com")
+	c.InvokeFail(t, "global domain is already taken", "checkAvailableGlobalDomain", "dom.dom.domain.com")
+
 	c.InvokeFail(t, "domain name too long", "isAvailable", getTooLongDomainName(255))
 }