[#108] nns: Add GetDomains

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", "getDomains"]
 events:
   - name: RegisterDomain
     parameters:

nns/nns_contract.go

@@ -1070,3 +1070,14 @@ func getAllRecords(ctx storage.Context, name string) iterator.Iterator {
 	recordsKey := getRecordsKey(tokenID, name)
 	return storage.Find(ctx, recordsKey, storage.ValuesOnly|storage.DeserializeValues)
 }
+
+// GetDomains returns a iterator over all domains.
+func GetDomains() iterator.Iterator {
+	ctx := storage.GetReadOnlyContext()
+	return getDomains(ctx)
+}
+
+func getDomains(ctx storage.Context) iterator.Iterator {
+	it := storage.Find(ctx, []byte{prefixName}, storage.ValuesOnly|storage.DeserializeValues)
+	return it
+}

rpcclient/nns/client.go

@@ -85,6 +85,20 @@ func New(actor Actor, hash util.Uint160) *Contract {
 	return &Contract{ContractReader{nep11ndt.NonDivisibleReader, actor, hash}, nep11ndt.BaseWriter, actor, hash}
 }
 
+// GetDomains invokes `getDomains` method of contract.
+func (c *ContractReader) GetDomains() (uuid.UUID, result.Iterator, error) {
+	return unwrap.SessionIterator(c.invoker.Call(c.hash, "getDomains"))
+}
+
+// GetDomainsExpanded is similar to GetDomains (uses the same contract
+// method), but can be useful if the server used doesn't support sessions and
+// doesn't expand iterators. It creates a script that will get the specified
+// number of result items from the iterator right in the VM and return them to
+// you. It's only limited by VM stack and GAS available for RPC invocations.
+func (c *ContractReader) GetDomainsExpanded(_numOfIteratorItems int) ([]stackitem.Item, error) {
+	return unwrap.Array(c.invoker.CallAndExpandIterator(c.hash, "getDomains", _numOfIteratorItems))
+}
+
 // GetPrice invokes `getPrice` method of contract.
 func (c *ContractReader) GetPrice() (*big.Int, error) {
 	return unwrap.BigInt(c.invoker.Call(c.hash, "getPrice"))

tests/nns_test.go

@@ -232,6 +232,40 @@ func TestGlobalDomain(t *testing.T) {
 
 	c.InvokeFail(t, "global domain is already taken", "isAvailable", "dom.testdomain.com")
 }
+
+func TestGetDomains(t *testing.T) {
+	c := newNNSInvoker(t, false)
+
+	accTop := c.NewAccount(t)
+	refresh, retry, expire, ttl := int64(101), int64(102), int64(103), int64(104)
+	c1 := c.WithSigners(c.Committee, accTop)
+	domains := make(map[string]*stackitem.Struct)
+
+	c1.Invoke(t, true, "register",
+		"com", accTop.ScriptHash(), "myemail@frostfs.info", refresh, retry, expire, ttl)
+	domains["com"] = stackitem.NewStruct([]stackitem.Item{stackitem.Make(accTop.ScriptHash()), stackitem.Make("com"), stackitem.Make(big.Word(int64(c1.TopBlock(t).Timestamp) + expire*1000)), stackitem.Null{}})
+
+	c1.Invoke(t, true, "register",
+		"net", accTop.ScriptHash(), "myemail@frostfs.info", refresh, retry, expire, ttl)
+	domains["net"] = stackitem.NewStruct([]stackitem.Item{stackitem.Make(accTop.ScriptHash()), stackitem.Make("net"), stackitem.Make(big.Word(int64(c1.TopBlock(t).Timestamp) + expire*1000)), stackitem.Null{}})
+
+	c1.Invoke(t, true, "register",
+		"com.com", accTop.ScriptHash(), "myemail@frostfs.info", refresh, retry, expire, ttl)
+	domains["com.com"] = stackitem.NewStruct([]stackitem.Item{stackitem.Make(accTop.ScriptHash()), stackitem.Make("com.com"), stackitem.Make(big.Word(int64(c1.TopBlock(t).Timestamp) + expire*1000)), stackitem.Null{}})
+
+	stack, _ := c1.TestInvoke(t, "getDomains")
+	iter := stack.Pop().Value().(*storage.Iterator)
+
+	require.True(t, iter.Next())
+	require.Equal(t, domains["net"], iter.Value())
+
+	require.True(t, iter.Next())
+	require.Equal(t, domains["com.com"], iter.Value())
+
+	require.True(t, iter.Next())
+	require.Equal(t, domains["com"], iter.Value())
+}
+
 func TestTLDRecord(t *testing.T) {
 	c := newNNSInvoker(t, true)
 	c.Invoke(t, stackitem.Null{}, "addRecord",