ss

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

docs/globally-unique-domain-zone.md

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+# Globally unique domain zone
+
+**Make sure you understand the [basic concepts](../nns/README.md) of `NNS`.**
+
+`Globally Unique Domains Zone` (`GUDZ`) is an extension of `NNS` that ensures unique names across multiple domain zones. When this option is enabled, all newly created domains will automatically receive a corresponding alias in the designated global zone. Deleting a domain will also remove its alias from the global zone.
+
+It's important to note that this feature is not retroactive: domains created before this option is enabled will not receive a global alias. Likewise, if the option is later disabled, domains that already have a `GUDZ` alias will retain their records. To fully disable `GUDZ`, all domains must be recreated with the option turned off.
+
+To enable `GUDZ`, add a `cnametgt=$(global domain)` `TXT` record that specifies the global zone.
+
+**Example:**
+
+Domains:
+- `poland`
+- `sweden`
+- `animals.org`
+
+![](img/GUDZ-2.png)
+
+It is necessary to associate the domain zones `.poland` and `.sweden` into the global zone `.animals`.
+
+![](img/GUDZ-1.png)
+
+Create domains:
+
+```
+frostfs-adm morph nns register --name="poland" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+frostfs-adm morph nns register --name="sweden" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+frostfs-adm morph nns register --name="org" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+frostfs-adm morph nns register --name="animals.org" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+```
+
+Add the `cnametgt` records:
+
+```
+frostfs-adm morph nns  add-record --name="poland" --data="cnametgt=animals.org" --type="txt" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml 
+frostfs-adm morph nns  add-record --name="sweden" --data="cnametgt=animals.org" --type="txt" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml 
+```
+
+Create a domain with mapping to the global zone:
+
+```
+frostfs-adm morph nns register --name="bober.poland" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+```
+
+Add any `TXT` record
+
+```
+frostfs-adm morph nns  add-record --name="bober.poland" --data="CID" --type="txt" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml 
+```
+
+Verify that the created domain has alias in the global zone
+
+```
+frostfs-adm morph nns tokens -v --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+
+balance.frostfs
+animals.org
+group.frostfs
+container
+org
+container.frostfs
+proxy.frostfs
+policy.frostfs
+alphabet0.frostfs
+sweden
+frostfsid.frostfs
+bober.animals.org (CNAME: bober.sweden)
+netmap.frostfs
+frostfs
+poland
+bober.poland
+```
+
+Create of a conflicting domain
+```
+frostfs-adm morph nns register --name="bober.sweden" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+
+unable to register domain: script failed (FAULT state) due to an error: at instruction 1263 (THROW): unhandled exception: "global domain is already taken: bober.animals.org. Domain: bober.sweden
+```
+
+**Disable GUDZ**
+Delete `cnametgt` records
+
+```
+frostfs-adm morph nns delete-records --type=txt --name=poland --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+```
+Create `hamster.poland` and `hamster.sweden`
+```
+frostfs-adm morph nns register --name="hamster.poland" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+frostfs-adm morph nns register --name="hamster.sweden" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+```
+`hamster.poland` and `hamster.sweden` does not have alias
+```
+frostfs-adm morph nns tokens -v --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+balance.frostfs
+animals.org
+group.frostfs
+container
+org
+container.frostfs
+proxy.frostfs
+policy.frostfs
+alphabet0.frostfs
+sweden
+frostfsid.frostfs
+bober.animals.org (CNAME: bober.poland)
+netmap.frostfs
+frostfs
+poland
+bober.poland
+hamster.poland
+```
+Delete global alias of `bober.poland`
+
+```
+ frostfs-adm morph nns delete-records --name="bober.poland" --type="txt" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+```
+
+
+```
+frostfs-adm morph nns tokens -v --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+balance.frostfs
+animals.org
+group.frostfs
+container
+org
+container.frostfs
+proxy.frostfs
+policy.frostfs
+alphabet0.frostfs
+sweden
+frostfsid.frostfs
+netmap.frostfs
+frostfs
+poland
+bober.poland
+hamster.poland
+```
+Delete `bober.poland`
+```
+ frostfs-adm morph nns delete --name="bober.poland" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+```
+
+```
+frostfs-adm morph nns tokens -v --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
+balance.frostfs
+animals.org
+group.frostfs
+container
+org
+container.frostfs
+proxy.frostfs
+policy.frostfs
+alphabet0.frostfs
+sweden
+frostfsid.frostfs
+netmap.frostfs
+frostfs
+poland
+hamster.poland
+```

docs/img/GUDZ.drawio

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nns/README.md

@@ -0,0 +1,46 @@
+# NNS 
+NNS - Neo Name Service is a service that allows manage a domain name as a digital asset (NFT). It has an interface similar to `DNS` but has significant differences in its internal structure.
+
+## Entities:
+
+- Domain
+- Record
+- Owner
+- Committee
+
+### Domain
+
+Domain is string that satisfies the following requirements:
+- Length from 2 to 255 characters.
+- Root domain must start with a letter.
+- All other fragments must start and end with a letter or digit.
+
+Domain has owner, a registration period, and may optionally have records.
+
+A fee established by the committee is charged upon domain registration. After registration, the owner can manage this asset (add/delete records, transfer ownership to another owner) until the end of the domain registration period.
+
+### Record
+
+A record is a pair of values `<type, string>`.
+
+Supported record types:
+
+| Type  | Description                               |
+|-------|-------------------------------------------|
+| A     | Represents address record type            |
+| AAA   | Represents IPv6 address record type       |
+| TXT   | Represents text record type               |
+| CNAME | Represents canonical name record type     |
+| SOA   | Represents start of authority record type |
+
+### Owner
+
+An owner is a wallet that has the right to manage this NFT (domain).
+
+### Committee
+
+The committee makes new tokens (domains), sets, and charges a fee for issuance.
+
+## Globally Unique Domain Zone
+
+For more information, see [here](../docs/globally-unique-domain-zone.md).

nns/nns_contract.go

@@ -509,13 +509,17 @@ func deleteRecords(ctx storage.Context, name string, typ RecordType) {
 	tokenID := []byte(tokenIDFromName(name))
 	ns := getNameState(ctx, tokenID)
 	ns.checkAdmin()
-
+	if typ == TXT {
-	globalDomainStorage := append([]byte{prefixGlobalDomain}, getTokenKey([]byte(name))...)
+		globalDomainKey := append([]byte{prefixGlobalDomain}, getTokenKey([]byte(name))...)
-	globalDomainRaw := storage.Get(ctx, globalDomainStorage)
+		globalDomainRaw := storage.Get(ctx, globalDomainKey)
+		if globalDomainRaw != nil {
 			globalDomain := globalDomainRaw.(string)
-	if globalDomainRaw != nil && globalDomain != "" {
+			if globalDomain != "" {
 				deleteDomain(ctx, globalDomain)
 			}
+			storage.Delete(ctx, globalDomainKey)
+		}
+	}
 
 	recordsKey := getRecordsKeyByType(tokenID, name, typ)
 	records := storage.Find(ctx, recordsKey, storage.KeysOnly)
@@ -534,23 +538,27 @@ func DeleteDomain(name string) {
 }
 
 func deleteDomain(ctx storage.Context, name string) {
-	nameKey := append([]byte{prefixName}, getTokenKey([]byte(name))...)
+	it := Tokens()
-	tldBytes := storage.Get(ctx, nameKey)
+	for iterator.Next(it) {
-	if tldBytes == nil {
+		domain := iterator.Value(it)
-		return
+		if std.MemorySearch([]byte(domain.(string)), []byte(name)) > 0 {
+			panic("can't delete a domain that has subdomains")
+		}
+	}
+	nsKey := append([]byte{prefixName}, getTokenKey([]byte(name))...)
+	nsRaw := storage.Get(ctx, nsKey)
+	if nsRaw == nil {
+		panic("domain not found")
 	}
 
-	globalDomainRaw := storage.Get(ctx, append([]byte{prefixGlobalDomain}, getTokenKey([]byte(name))...))
+	ns := std.Deserialize(nsRaw.([]byte)).(NameState)
-	globalDomain := globalDomainRaw.(string)
+	ns.checkAdmin()
-	if globalDomainRaw != nil && globalDomain != "" {
-		deleteDomain(ctx, globalDomain)
-	}
 
 	deleteRecords(ctx, name, CNAME)
 	deleteRecords(ctx, name, TXT)
 	deleteRecords(ctx, name, A)
 	deleteRecords(ctx, name, AAAA)
-	storage.Delete(ctx, nameKey)
+	storage.Delete(ctx, nsKey)
 	runtime.Notify("DeleteDomain", name)
 }
 

tests/nns_test.go

@@ -189,6 +189,38 @@ func TestNNSRegister(t *testing.T) {
 	c.InvokeFail(t, "token not found", "getRecords", "testdomain.com", int64(nns.SOA))
 }
 
+func TestDeleteDomain(t *testing.T) {
+	c := newNNSInvoker(t, false)
+
+	acc1 := c.NewAccount(t)
+	c1 := c.WithSigners(c.Committee, acc1)
+
+	acc2 := c.NewAccount(t)
+	c2 := c.WithSigners(c.Committee, acc2)
+	c1.Invoke(t, true, "register",
+		"com", acc1.ScriptHash(),
+		"myemail@frostfs.info", defaultRefresh, defaultRetry, defaultExpire, defaultTTL)
+
+	c1.Invoke(t, true, "register",
+		"testdomain.com", acc1.ScriptHash(),
+		"myemail@frostfs.info", defaultRefresh, defaultRetry, defaultExpire, defaultTTL)
+
+	c1.Invoke(t, true, "register",
+		"domik.testdomain.com", acc1.ScriptHash(),
+		"myemail@frostfs.info", defaultRefresh, defaultRetry, defaultExpire, defaultTTL)
+
+	c1.InvokeFail(t, "domain not found", "deleteDomain", "ru")
+	c1.InvokeFail(t, "can't delete a domain that has subdomains", "deleteDomain", "testdomain.com")
+	c1.Invoke(t, stackitem.Null{}, "deleteDomain", "domik.testdomain.com")
+	c1.Invoke(t, stackitem.Null{}, "deleteDomain", "testdomain.com")
+
+	c1.Invoke(t, true, "register",
+		"cn", acc1.ScriptHash(),
+		"myemail@frostfs.info", defaultRefresh, defaultRetry, defaultExpire, defaultTTL)
+
+	c2.InvokeFail(t, "not witnessed by admin", "deleteDomain", "cn")
+}
+
 func TestGlobalDomain(t *testing.T) {
 	c := newNNSInvoker(t, false)