manifest: add manifest validity checks

Refs. #1699.

cli/testdata/deploy/neo-go.yml

@@ -0,0 +1 @@
+name: Test deploy

pkg/smartcontract/manifest/group.go

@@ -5,6 +5,7 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"errors"
+	"sort"
 
 	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
@@ -20,6 +21,9 @@ type Group struct {
 	Signature []byte          `json:"signature"`
 }
 
+// Groups is just an array of Group.
+type Groups []Group
+
 type groupAux struct {
 	PublicKey string `json:"pubkey"`
 	Signature []byte `json:"signature"`
@@ -33,6 +37,33 @@ func (g *Group) IsValid(h util.Uint160) error {
 	return nil
 }
 
+// AreValid checks for groups correctness and uniqueness.
+func (g Groups) AreValid(h util.Uint160) error {
+	for i := range g {
+		err := g[i].IsValid(h)
+		if err != nil {
+			return err
+		}
+	}
+	if len(g) < 2 {
+		return nil
+	}
+	pkeys := make(keys.PublicKeys, len(g))
+	for i := range g {
+		pkeys[i] = g[i].PublicKey
+	}
+	sort.Sort(pkeys)
+	for i := range pkeys {
+		if i == 0 {
+			continue
+		}
+		if pkeys[i].Cmp(pkeys[i-1]) == 0 {
+			return errors.New("duplicate group keys")
+		}
+	}
+	return nil
+}
+
 // MarshalJSON implements json.Marshaler interface.
 func (g *Group) MarshalJSON() ([]byte, error) {
 	aux := &groupAux{

pkg/smartcontract/manifest/group_test.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/nspcc-dev/neo-go/internal/testserdes"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neo-go/pkg/util"
 	"github.com/stretchr/testify/require"
 )
 
@@ -16,3 +17,27 @@ func TestGroupJSONInOut(t *testing.T) {
 	g := Group{pub, sig}
 	testserdes.MarshalUnmarshalJSON(t, &g, new(Group))
 }
+
+func TestGroupsAreValid(t *testing.T) {
+	h := util.Uint160{42, 42, 42}
+	priv, err := keys.NewPrivateKey()
+	require.NoError(t, err)
+	priv2, err := keys.NewPrivateKey()
+	require.NoError(t, err)
+	pub := priv.PublicKey()
+	pub2 := priv2.PublicKey()
+	gcorrect := Group{pub, priv.Sign(h.BytesBE())}
+	gcorrect2 := Group{pub2, priv2.Sign(h.BytesBE())}
+	gincorrect := Group{pub, priv.Sign(h.BytesLE())}
+	gps := Groups{gcorrect}
+	require.NoError(t, gps.AreValid(h))
+
+	gps = Groups{gincorrect}
+	require.Error(t, gps.AreValid(h))
+
+	gps = Groups{gcorrect, gcorrect2}
+	require.NoError(t, gps.AreValid(h))
+
+	gps = Groups{gcorrect, gcorrect}
+	require.Error(t, gps.AreValid(h))
+}

pkg/smartcontract/manifest/manifest.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"math"
+	"sort"
 
 	"github.com/nspcc-dev/neo-go/pkg/util"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
@@ -75,14 +76,43 @@ func (m *Manifest) CanCall(hash util.Uint160, toCall *Manifest, method string) b
 func (m *Manifest) IsValid(hash util.Uint160) error {
 	var err error
 
+	if m.Name == "" {
+		return errors.New("no name")
+	}
+
+	for i := range m.SupportedStandards {
+		if m.SupportedStandards[i] == "" {
+			return errors.New("invalid nameless supported standard")
+		}
+	}
+	if len(m.SupportedStandards) > 1 {
+		names := make([]string, len(m.SupportedStandards))
+		copy(names, m.SupportedStandards)
+		if stringsHaveDups(names) {
+			return errors.New("duplicate supported standards")
+		}
+	}
 	err = m.ABI.IsValid()
 	if err != nil {
 		return err
 	}
-	for _, g := range m.Groups {
+	err = Groups(m.Groups).AreValid(hash)
-		err = g.IsValid(hash)
+	if err != nil {
-		if err != nil {
+		return err
-			return err
+	}
+	if len(m.Trusts.Value) > 1 {
+		hashes := make([]util.Uint160, len(m.Trusts.Value))
+		copy(hashes, m.Trusts.Value)
+		sort.Slice(hashes, func(i, j int) bool {
+			return hashes[i].Less(hashes[j])
+		})
+		for i := range hashes {
+			if i == 0 {
+				continue
+			}
+			if hashes[i] == hashes[i-1] {
+				return errors.New("duplicate trusted contracts")
+			}
 		}
 	}
 	return Permissions(m.Permissions).AreValid()

pkg/smartcontract/manifest/manifest_test.go

@@ -109,7 +109,13 @@ func TestPermission_IsAllowed(t *testing.T) {
 
 func TestIsValid(t *testing.T) {
 	contractHash := util.Uint160{1, 2, 3}
-	m := NewManifest("Test")
+	m := &Manifest{}
+
+	t.Run("invalid, no name", func(t *testing.T) {
+		require.Error(t, m.IsValid(contractHash))
+	})
+
+	m = NewManifest("Test")
 
 	t.Run("invalid, no ABI methods", func(t *testing.T) {
 		require.Error(t, m.IsValid(contractHash))
@@ -158,6 +164,39 @@ func TestIsValid(t *testing.T) {
 	})
 	m.Permissions = m.Permissions[:1]
 
+	m.SupportedStandards = append(m.SupportedStandards, "NEP-17")
+	t.Run("valid, with standards", func(t *testing.T) {
+		require.NoError(t, m.IsValid(contractHash))
+	})
+
+	m.SupportedStandards = append(m.SupportedStandards, "")
+	t.Run("invalid, with nameless standard", func(t *testing.T) {
+		require.Error(t, m.IsValid(contractHash))
+	})
+	m.SupportedStandards = m.SupportedStandards[:1]
+
+	m.SupportedStandards = append(m.SupportedStandards, "NEP-17")
+	t.Run("invalid, with duplicate standards", func(t *testing.T) {
+		require.Error(t, m.IsValid(contractHash))
+	})
+	m.SupportedStandards = m.SupportedStandards[:1]
+
+	m.Trusts.Add(util.Uint160{1, 2, 3})
+	t.Run("valid, with trust", func(t *testing.T) {
+		require.NoError(t, m.IsValid(contractHash))
+	})
+
+	m.Trusts.Add(util.Uint160{3, 2, 1})
+	t.Run("valid, with trusts", func(t *testing.T) {
+		require.NoError(t, m.IsValid(contractHash))
+	})
+
+	m.Trusts.Add(util.Uint160{1, 2, 3})
+	t.Run("invalid, with trusts", func(t *testing.T) {
+		require.Error(t, m.IsValid(contractHash))
+	})
+	m.Trusts.Restrict()
+
 	t.Run("with groups", func(t *testing.T) {
 		m.Groups = make([]Group, 3)
 		pks := make([]*keys.PrivateKey, 3)