rpcsrv: add hardforks to getversion response

Port neo-project/neo-modules#823.

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

Author: AnnaShaleva

pkg/neorpc/result/version.go

@@ -2,7 +2,10 @@ package result
 
 import (
 	"encoding/json"
+	"fmt"
+	"strings"
 
+	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
 	"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
 )
@@ -29,6 +32,8 @@ type (
 		MemoryPoolMaxTransactions   int
 		ValidatorsCount             byte
 		InitialGasDistribution      fixedn.Fixed8
+		// Hardforks is the map of network hardforks with the enabling height.
+		Hardforks map[config.Hardfork]uint32
 
 		// Below are NeoGo-specific extensions to the protocol that are
 		// returned by the server in case they're enabled.
@@ -54,16 +59,36 @@ type (
 		MemoryPoolMaxTransactions   int           `json:"memorypoolmaxtransactions"`
 		ValidatorsCount             byte          `json:"validatorscount"`
 		InitialGasDistribution      int64         `json:"initialgasdistribution"`
+		Hardforks                   []hardforkAux `json:"hardforks"`
 
 		CommitteeHistory  map[uint32]uint32 `json:"committeehistory,omitempty"`
 		P2PSigExtensions  bool              `json:"p2psigextensions,omitempty"`
 		StateRootInHeader bool              `json:"staterootinheader,omitempty"`
 		ValidatorsHistory map[uint32]uint32 `json:"validatorshistory,omitempty"`
 	}
+
+	// hardforkAux is an auxiliary struct used for Hardfork JSON marshalling.
+	hardforkAux struct {
+		Name   string `json:"name"`
+		Height uint32 `json:"blockheight"`
+	}
 )
 
+// prefixHardfork is a prefix used for hardfork names in C# node.
+const prefixHardfork = "HF_"
+
 // MarshalJSON implements the JSON marshaler interface.
 func (p Protocol) MarshalJSON() ([]byte, error) {
+	// Keep hardforks sorted by name in the result.
+	hfs := make([]hardforkAux, 0, len(p.Hardforks))
+	for _, hf := range config.Hardforks {
+		if h, ok := p.Hardforks[hf]; ok {
+			hfs = append(hfs, hardforkAux{
+				Name:   hf.String(),
+				Height: h,
+			})
+		}
+	}
 	aux := protocolMarshallerAux{
 		AddressVersion:              p.AddressVersion,
 		Network:                     p.Network,
@@ -74,6 +99,7 @@ func (p Protocol) MarshalJSON() ([]byte, error) {
 		MemoryPoolMaxTransactions:   p.MemoryPoolMaxTransactions,
 		ValidatorsCount:             p.ValidatorsCount,
 		InitialGasDistribution:      int64(p.InitialGasDistribution),
+		Hardforks:                   hfs,
 
 		CommitteeHistory:  p.CommitteeHistory,
 		P2PSigExtensions:  p.P2PSigExtensions,
@@ -104,5 +130,21 @@ func (p *Protocol) UnmarshalJSON(data []byte) error {
 	p.ValidatorsHistory = aux.ValidatorsHistory
 	p.InitialGasDistribution = fixedn.Fixed8(aux.InitialGasDistribution)
 
+	// Filter out unknown hardforks.
+	for i := range aux.Hardforks {
+		aux.Hardforks[i].Name = strings.TrimPrefix(aux.Hardforks[i].Name, prefixHardfork)
+		if !config.IsHardforkValid(aux.Hardforks[i].Name) {
+			return fmt.Errorf("unexpected hardfork: %s", aux.Hardforks[i].Name)
+		}
+	}
+	p.Hardforks = make(map[config.Hardfork]uint32, len(aux.Hardforks))
+	for _, cfgHf := range config.Hardforks {
+		for _, auxHf := range aux.Hardforks {
+			if auxHf.Name == cfgHf.String() {
+				p.Hardforks[cfgHf] = auxHf.Height
+			}
+		}
+	}
+
 	return nil
 }

pkg/neorpc/result/version_test.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"testing"
 
+	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
 	"github.com/stretchr/testify/require"
 )
@@ -38,7 +39,8 @@ func TestVersion_MarshalUnmarshalJSON(t *testing.T) {
             "memorypoolmaxtransactions": 50000,
             "msperblock": 15000,
             "network": 860833102,
-            "validatorscount": 7
+            "validatorscount": 7,
+            "hardforks": [{"name": "Aspidochelone", "blockheight": 123}, {"name": "Basilisk", "blockheight": 1234}]
         },
         "tcpport": 10333,
         "useragent": "/NEO-GO:0.98.6/",
@@ -55,7 +57,8 @@ func TestVersion_MarshalUnmarshalJSON(t *testing.T) {
             "memorypoolmaxtransactions": 50000,
             "msperblock": 15000,
             "network": 860833102,
-            "validatorscount": 7
+            "validatorscount": 7,
+            "hardforks": [{"name": "HF_Aspidochelone", "blockheight": 123}, {"name": "HF_Basilisk", "blockheight": 1234}]
         },
         "tcpport": 10333,
         "useragent": "/Neo:3.1.0/",
@@ -78,6 +81,7 @@ func TestVersion_MarshalUnmarshalJSON(t *testing.T) {
 			// Unmarshalled InitialGasDistribution should always be a valid Fixed8 for both old and new clients.
 			InitialGasDistribution: fixedn.Fixed8FromInt64(52000000),
 			StateRootInHeader:      false,
+			Hardforks:              map[config.Hardfork]uint32{config.HFAspidochelone: 123, config.HFBasilisk: 1234},
 		},
 	}
 	t.Run("MarshalJSON", func(t *testing.T) {

pkg/rpcclient/rpc_test.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/gorilla/websocket"
 	"github.com/nspcc-dev/neo-go/internal/testserdes"
+	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
@@ -1031,7 +1032,8 @@ var rpcClientTestCases = map[string][]rpcClientTestCase{
 					Nonce:     2153672787,
 					UserAgent: "/NEO-GO:0.73.1-pre-273-ge381358/",
 					Protocol: result.Protocol{
-						Network: netmode.UnitTestNet,
+						Network:   netmode.UnitTestNet,
+						Hardforks: map[config.Hardfork]uint32{},
 					},
 				}
 			},

pkg/services/rpcsrv/client_test.go

@@ -2356,3 +2356,20 @@ func TestClient_GetStorageHistoric(t *testing.T) {
 	_, err = c.GetStorageByHashHistoric(earlyRoot.Root, h, key)
 	require.ErrorIs(t, neorpc.ErrUnknownStorageItem, err)
 }
+
+func TestClient_GetVersion_Hardforks(t *testing.T) {
+	chain, rpcSrv, httpSrv := initServerWithInMemoryChain(t)
+	defer chain.Close()
+	defer rpcSrv.Shutdown()
+
+	c, err := rpcclient.New(context.Background(), httpSrv.URL, rpcclient.Options{})
+	require.NoError(t, err)
+	require.NoError(t, c.Init())
+
+	v, err := c.GetVersion()
+	require.NoError(t, err)
+	expected := map[config.Hardfork]uint32{
+		config.HFAspidochelone: 25,
+	}
+	require.InDeltaMapValues(t, expected, v.Protocol.Hardforks, 0)
+}

pkg/services/rpcsrv/server.go

@@ -839,6 +839,14 @@ func (s *Server) getVersion(_ params.Params) (any, *neorpc.Error) {
 	}
 
 	cfg := s.chain.GetConfig()
+	hfs := make(map[config.Hardfork]uint32, len(cfg.Hardforks))
+	for _, cfgHf := range config.Hardforks {
+		height, ok := cfg.Hardforks[cfgHf.String()]
+		if !ok {
+			continue
+		}
+		hfs[cfgHf] = height
+	}
 	return &result.Version{
 		TCPPort:   port,
 		Nonce:     s.coreServer.ID(),
@@ -853,6 +861,7 @@ func (s *Server) getVersion(_ params.Params) (any, *neorpc.Error) {
 			MemoryPoolMaxTransactions:   cfg.MemPoolSize,
 			ValidatorsCount:             byte(cfg.GetNumOfCNs(s.chain.BlockHeight())),
 			InitialGasDistribution:      cfg.InitialGASSupply,
+			Hardforks:                   hfs,
 
 			CommitteeHistory:  cfg.CommitteeHistory,
 			P2PSigExtensions:  cfg.P2PSigExtensions,