Merge pull request #2229 from nspcc-dev/contract-test

Generic contract testing infrastructure

.gitignore

@@ -28,9 +28,8 @@ bin/
 *~
 TAGS
 
-# leveldb 
+# storage 
-chains/
+/chains
-chain/
 
 # patch
 *.orig

examples/nft-nd-nns/tests/nonnative_name_service_test.go

@@ -0,0 +1,429 @@
+package tests
+
+import (
+	"strings"
+	"testing"
+
+	nns "github.com/nspcc-dev/neo-go/examples/nft-nd-nns"
+	"github.com/nspcc-dev/neo-go/pkg/compiler"
+	"github.com/nspcc-dev/neo-go/pkg/core/interop/storage"
+	"github.com/nspcc-dev/neo-go/pkg/neotest"
+	"github.com/nspcc-dev/neo-go/pkg/neotest/chain"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+	"github.com/stretchr/testify/require"
+)
+
+func newNSClient(t *testing.T) *neotest.ContractInvoker {
+	bc, acc := chain.NewSingle(t)
+	e := neotest.NewExecutor(t, bc, acc, acc)
+	c := neotest.CompileFile(t, e.CommitteeHash, "..", "../nns.yml")
+	e.DeployContract(t, c, nil)
+
+	h, err := e.Chain.GetContractScriptHash(1)
+	require.NoError(t, err)
+	require.Equal(t, c.Hash, h)
+	return e.CommitteeInvoker(h)
+}
+
+func TestNameService_Price(t *testing.T) {
+	const (
+		minPrice = int64(0)
+		maxPrice = int64(10000_00000000)
+	)
+
+	c := newNSClient(t)
+
+	t.Run("set, not signed by committee", func(t *testing.T) {
+		acc := c.NewAccount(t)
+		cAcc := c.WithSigners(acc)
+		cAcc.InvokeFail(t, "not witnessed by committee", "setPrice", minPrice+1)
+	})
+
+	t.Run("get, default value", func(t *testing.T) {
+		c.Invoke(t, defaultNameServiceDomainPrice, "getPrice")
+	})
+
+	t.Run("set, too small value", func(t *testing.T) {
+		c.InvokeFail(t, "The price is out of range.", "setPrice", minPrice-1)
+	})
+
+	t.Run("set, too large value", func(t *testing.T) {
+		c.InvokeFail(t, "The price is out of range.", "setPrice", maxPrice+1)
+	})
+
+	t.Run("set, success", func(t *testing.T) {
+		txSet := c.PrepareInvoke(t, "setPrice", int64(defaultNameServiceDomainPrice+1))
+		txGet := c.PrepareInvoke(t, "getPrice")
+		c.AddBlockCheckHalt(t, txSet, txGet)
+		c.CheckHalt(t, txSet.Hash(), stackitem.Null{})
+		c.CheckHalt(t, txGet.Hash(), stackitem.Make(defaultNameServiceDomainPrice+1))
+
+		// Get in the next block.
+		c.Invoke(t, stackitem.Make(defaultNameServiceDomainPrice+1), "getPrice")
+	})
+}
+
+func TestNonfungible(t *testing.T) {
+	c := newNSClient(t)
+
+	c.Signers = []neotest.Signer{c.NewAccount(t)}
+	c.Invoke(t, "NNS", "symbol")
+	c.Invoke(t, 0, "decimals")
+	c.Invoke(t, 0, "totalSupply")
+}
+
+func TestAddRoot(t *testing.T) {
+	c := newNSClient(t)
+
+	t.Run("invalid format", func(t *testing.T) {
+		c.InvokeFail(t, "invalid root format", "addRoot", "")
+	})
+	t.Run("not signed by committee", func(t *testing.T) {
+		acc := c.NewAccount(t)
+		c := c.WithSigners(acc)
+		c.InvokeFail(t, "not witnessed by committee", "addRoot", "some")
+	})
+
+	c.Invoke(t, stackitem.Null{}, "addRoot", "some")
+	t.Run("already exists", func(t *testing.T) {
+		c.InvokeFail(t, "already exists", "addRoot", "some")
+	})
+}
+
+func TestExpiration(t *testing.T) {
+	c := newNSClient(t)
+	e := c.Executor
+	bc := e.Chain
+
+	acc := e.NewAccount(t)
+	cAcc := c.WithSigners(acc)
+
+	c.Invoke(t, stackitem.Null{}, "addRoot", "com")
+	cAcc.Invoke(t, true, "register", "first.com", acc.ScriptHash())
+	cAcc.Invoke(t, stackitem.Null{}, "setRecord", "first.com", int64(nns.TXT), "sometext")
+	b1 := e.TopBlock(t)
+
+	tx := cAcc.PrepareInvoke(t, "register", "second.com", acc.ScriptHash())
+	b2 := e.NewUnsignedBlock(t, tx)
+	b2.Index = b1.Index + 1
+	b2.PrevHash = b1.Hash()
+	b2.Timestamp = b1.Timestamp + 10000
+	require.NoError(t, bc.AddBlock(e.SignBlock(b2)))
+	e.CheckHalt(t, tx.Hash())
+
+	tx = cAcc.PrepareInvoke(t, "isAvailable", "first.com")
+	b3 := e.NewUnsignedBlock(t, tx)
+	b3.Index = b2.Index + 1
+	b3.PrevHash = b2.Hash()
+	b3.Timestamp = b1.Timestamp + (millisecondsInYear + 1)
+	require.NoError(t, bc.AddBlock(e.SignBlock(b3)))
+	e.CheckHalt(t, tx.Hash(), stackitem.NewBool(true))
+
+	tx = cAcc.PrepareInvoke(t, "isAvailable", "second.com")
+	b4 := e.NewUnsignedBlock(t, tx)
+	b4.Index = b3.Index + 1
+	b4.PrevHash = b3.Hash()
+	b4.Timestamp = b3.Timestamp + 1000
+	require.NoError(t, bc.AddBlock(e.SignBlock(b4)))
+	e.CheckHalt(t, tx.Hash(), stackitem.NewBool(false))
+
+	tx = cAcc.PrepareInvoke(t, "getRecord", "first.com", int64(nns.TXT))
+	b5 := e.NewUnsignedBlock(t, tx)
+	b5.Index = b4.Index + 1
+	b5.PrevHash = b4.Hash()
+	b5.Timestamp = b4.Timestamp + 1000
+	require.NoError(t, bc.AddBlock(e.SignBlock(b5)))
+	e.CheckFault(t, tx.Hash(), "name has expired")
+}
+
+const millisecondsInYear = 365 * 24 * 3600 * 1000
+
+func TestRegisterAndRenew(t *testing.T) {
+	c := newNSClient(t)
+	e := c.Executor
+
+	c.InvokeFail(t, "root not found", "isAvailable", "neo.com")
+	c.Invoke(t, stackitem.Null{}, "addRoot", "org")
+	c.InvokeFail(t, "root not found", "isAvailable", "neo.com")
+	c.Invoke(t, stackitem.Null{}, "addRoot", "com")
+	c.Invoke(t, true, "isAvailable", "neo.com")
+	c.InvokeWithFeeFail(t, "GAS limit exceeded", defaultNameServiceSysfee, "register", "neo.org", e.CommitteeHash)
+	c.InvokeFail(t, "invalid domain name format", "register", "docs.neo.org", e.CommitteeHash)
+	c.InvokeFail(t, "invalid domain name format", "register", "\nneo.com'", e.CommitteeHash)
+	c.InvokeFail(t, "invalid domain name format", "register", "neo.com\n", e.CommitteeHash)
+	c.InvokeWithFeeFail(t, "GAS limit exceeded", defaultNameServiceSysfee, "register", "neo.org", e.CommitteeHash)
+	c.InvokeWithFeeFail(t, "GAS limit exceeded", defaultNameServiceDomainPrice, "register", "neo.com", e.CommitteeHash)
+
+	c.Invoke(t, true, "isAvailable", "neo.com")
+	c.Invoke(t, 0, "balanceOf", e.CommitteeHash)
+	c.Invoke(t, true, "register", "neo.com", e.CommitteeHash)
+	topBlock := e.TopBlock(t)
+	expectedExpiration := topBlock.Timestamp + millisecondsInYear
+	c.Invoke(t, false, "register", "neo.com", e.CommitteeHash)
+	c.Invoke(t, false, "isAvailable", "neo.com")
+
+	props := stackitem.NewMap()
+	props.Add(stackitem.Make("name"), stackitem.Make("neo.com"))
+	props.Add(stackitem.Make("expiration"), stackitem.Make(expectedExpiration))
+	c.Invoke(t, props, "properties", "neo.com")
+	c.Invoke(t, 1, "balanceOf", e.CommitteeHash)
+	c.Invoke(t, e.CommitteeHash.BytesBE(), "ownerOf", []byte("neo.com"))
+
+	t.Run("invalid token ID", func(t *testing.T) {
+		c.InvokeFail(t, "token not found", "properties", "not.exists")
+		c.InvokeFail(t, "token not found", "ownerOf", "not.exists")
+		c.InvokeFail(t, "invalid conversion", "properties", []interface{}{})
+		c.InvokeFail(t, "invalid conversion", "ownerOf", []interface{}{})
+	})
+
+	// Renew
+	expectedExpiration += millisecondsInYear
+	c.Invoke(t, expectedExpiration, "renew", "neo.com")
+
+	props.Add(stackitem.Make("expiration"), stackitem.Make(expectedExpiration))
+	c.Invoke(t, props, "properties", "neo.com")
+}
+
+func TestSetGetRecord(t *testing.T) {
+	c := newNSClient(t)
+	e := c.Executor
+
+	acc := e.NewAccount(t)
+	cAcc := c.WithSigners(acc)
+	c.Invoke(t, stackitem.Null{}, "addRoot", "com")
+
+	t.Run("set before register", func(t *testing.T) {
+		c.InvokeFail(t, "token not found", "setRecord", "neo.com", int64(nns.TXT), "sometext")
+	})
+	c.Invoke(t, true, "register", "neo.com", e.CommitteeHash)
+	t.Run("invalid parameters", func(t *testing.T) {
+		c.InvokeFail(t, "unsupported record type", "setRecord", "neo.com", int64(0xFF), "1.2.3.4")
+		c.InvokeFail(t, "invalid record", "setRecord", "neo.com", int64(nns.A), "not.an.ip.address")
+	})
+	t.Run("invalid witness", func(t *testing.T) {
+		cAcc.InvokeFail(t, "not witnessed by admin", "setRecord", "neo.com", int64(nns.A), "1.2.3.4")
+	})
+	c.Invoke(t, stackitem.Null{}, "getRecord", "neo.com", int64(nns.A))
+	c.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.A), "1.2.3.4")
+	c.Invoke(t, "1.2.3.4", "getRecord", "neo.com", int64(nns.A))
+	c.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.A), "1.2.3.4")
+	c.Invoke(t, "1.2.3.4", "getRecord", "neo.com", int64(nns.A))
+	c.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.AAAA), "2001:0201:1f1f:0000:0000:0100:11a0:11df")
+	c.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.CNAME), "nspcc.ru")
+	c.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.TXT), "sometext")
+
+	// Delete record.
+	t.Run("invalid witness", func(t *testing.T) {
+		cAcc.InvokeFail(t, "not witnessed by admin", "deleteRecord", "neo.com", int64(nns.CNAME))
+	})
+	c.Invoke(t, "nspcc.ru", "getRecord", "neo.com", int64(nns.CNAME))
+	c.Invoke(t, stackitem.Null{}, "deleteRecord", "neo.com", int64(nns.CNAME))
+	c.Invoke(t, stackitem.Null{}, "getRecord", "neo.com", int64(nns.CNAME))
+	c.Invoke(t, "1.2.3.4", "getRecord", "neo.com", int64(nns.A))
+
+	t.Run("SetRecord_compatibility", func(t *testing.T) {
+		// tests are got from the NNS C# implementation and changed accordingly to non-native implementation behaviour
+		testCases := []struct {
+			Type       nns.RecordType
+			Name       string
+			ShouldFail bool
+		}{
+			{Type: nns.A, Name: "0.0.0.0", ShouldFail: true},
+			{Type: nns.A, Name: "1.1.0.1"},
+			{Type: nns.A, Name: "10.10.10.10", ShouldFail: true},
+			{Type: nns.A, Name: "255.255.255.255", ShouldFail: true},
+			{Type: nns.A, Name: "192.168.1.1", ShouldFail: true},
+			{Type: nns.A, Name: "1a", ShouldFail: true},
+			{Type: nns.A, Name: "256.0.0.0", ShouldFail: true},
+			{Type: nns.A, Name: "01.01.01.01", ShouldFail: true},
+			{Type: nns.A, Name: "00.0.0.0", ShouldFail: true},
+			{Type: nns.A, Name: "0.0.0.-1", ShouldFail: true},
+			{Type: nns.A, Name: "0.0.0.0.1", ShouldFail: true},
+			{Type: nns.A, Name: "11111111.11111111.11111111.11111111", ShouldFail: true},
+			{Type: nns.A, Name: "11111111.11111111.11111111.11111111", ShouldFail: true},
+			{Type: nns.A, Name: "ff.ff.ff.ff", ShouldFail: true},
+			{Type: nns.A, Name: "0.0.256", ShouldFail: true},
+			{Type: nns.A, Name: "0.0.0", ShouldFail: true},
+			{Type: nns.A, Name: "0.257", ShouldFail: true},
+			{Type: nns.A, Name: "1.1", ShouldFail: true},
+			{Type: nns.A, Name: "257", ShouldFail: true},
+			{Type: nns.A, Name: "1", ShouldFail: true},
+			// {2000} & {2001} & ]2002, 3ffe[ & {3fff} are valid values for IPv6 fragment0
+			{Type: nns.AAAA, Name: "2002:db8::8:800:200c:417a", ShouldFail: true},
+			{Type: nns.AAAA, Name: "3ffd:1b8::8:800:200c:417a"},
+			{Type: nns.AAAA, Name: "3ffd::101"},
+			{Type: nns.AAAA, Name: "2003::1"},
+			{Type: nns.AAAA, Name: "2003::"},
+			{Type: nns.AAAA, Name: "2002:db8:0:0:8:800:200c:417a", ShouldFail: true},
+			{Type: nns.AAAA, Name: "3ffd:db8:0:0:8:800:200c:417a"},
+			{Type: nns.AAAA, Name: "3ffd:0:0:0:0:0:0:101"},
+			{Type: nns.AAAA, Name: "2002:0:0:0:0:0:0:101", ShouldFail: true},
+			{Type: nns.AAAA, Name: "3ffd:0:0:0:0:0:0:101"},
+			{Type: nns.AAAA, Name: "2001:200:0:0:0:0:0:1"},
+			{Type: nns.AAAA, Name: "0:0:0:0:0:0:0:1", ShouldFail: true},
+			{Type: nns.AAAA, Name: "2002:0:0:0:0:0:0:1", ShouldFail: true},
+			{Type: nns.AAAA, Name: "2001:200:0:0:0:0:0:0"},
+			{Type: nns.AAAA, Name: "2002:0:0:0:0:0:0:0", ShouldFail: true},
+			{Type: nns.AAAA, Name: "2002:DB8::8:800:200C:417A", ShouldFail: true},
+			{Type: nns.AAAA, Name: "3FFD:1B8::8:800:200C:417A"},
+			{Type: nns.AAAA, Name: "3FFD::101"},
+			{Type: nns.AAAA, Name: "3fFD::101"},
+			{Type: nns.AAAA, Name: "2002:DB8:0:0:8:800:200C:417A", ShouldFail: true},
+			{Type: nns.AAAA, Name: "3FFD:DB8:0:0:8:800:200C:417A"},
+			{Type: nns.AAAA, Name: "3FFD:0:0:0:0:0:0:101"},
+			{Type: nns.AAAA, Name: "3FFD::ffff:1.01.1.01", ShouldFail: true},
+			{Type: nns.AAAA, Name: "2001:DB8:0:0:8:800:200C:4Z", ShouldFail: true},
+			{Type: nns.AAAA, Name: "2001::13.1.68.3", ShouldFail: true},
+		}
+		for _, testCase := range testCases {
+			args := []interface{}{"neo.com", int64(testCase.Type), testCase.Name}
+			t.Run(testCase.Name, func(t *testing.T) {
+				if testCase.ShouldFail {
+					c.InvokeFail(t, "", "setRecord", args...)
+				} else {
+					c.Invoke(t, stackitem.Null{}, "setRecord", args...)
+				}
+			})
+		}
+	})
+}
+
+func TestSetAdmin(t *testing.T) {
+	c := newNSClient(t)
+	e := c.Executor
+
+	owner := e.NewAccount(t)
+	cOwner := c.WithSigners(owner)
+	admin := e.NewAccount(t)
+	cAdmin := c.WithSigners(admin)
+	guest := e.NewAccount(t)
+	cGuest := c.WithSigners(guest)
+
+	c.Invoke(t, stackitem.Null{}, "addRoot", "com")
+
+	cOwner.Invoke(t, true, "register", "neo.com", owner.ScriptHash())
+	cGuest.InvokeFail(t, "not witnessed", "setAdmin", "neo.com", admin.ScriptHash())
+
+	// Must be witnessed by both owner and admin.
+	cOwner.InvokeFail(t, "not witnessed by admin", "setAdmin", "neo.com", admin.ScriptHash())
+	cAdmin.InvokeFail(t, "not witnessed by owner", "setAdmin", "neo.com", admin.ScriptHash())
+	cc := c.WithSigners(owner, admin)
+	cc.Invoke(t, stackitem.Null{}, "setAdmin", "neo.com", admin.ScriptHash())
+
+	t.Run("set and delete by admin", func(t *testing.T) {
+		cAdmin.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.TXT), "sometext")
+		cGuest.InvokeFail(t, "not witnessed by admin", "deleteRecord", "neo.com", int64(nns.TXT))
+		cAdmin.Invoke(t, stackitem.Null{}, "deleteRecord", "neo.com", int64(nns.TXT))
+	})
+
+	t.Run("set admin to null", func(t *testing.T) {
+		cAdmin.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.TXT), "sometext")
+		cOwner.Invoke(t, stackitem.Null{}, "setAdmin", "neo.com", nil)
+		cAdmin.InvokeFail(t, "not witnessed by admin", "deleteRecord", "neo.com", int64(nns.TXT))
+	})
+}
+
+func TestTransfer(t *testing.T) {
+	c := newNSClient(t)
+	e := c.Executor
+
+	from := e.NewAccount(t)
+	cFrom := c.WithSigners(from)
+	to := e.NewAccount(t)
+	cTo := c.WithSigners(to)
+
+	c.Invoke(t, stackitem.Null{}, "addRoot", "com")
+	cFrom.Invoke(t, true, "register", "neo.com", from.ScriptHash())
+	cFrom.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.A), "1.2.3.4")
+	cFrom.InvokeFail(t, "token not found", "transfer", to.ScriptHash(), "not.exists", nil)
+	c.Invoke(t, false, "transfer", to.ScriptHash(), "neo.com", nil)
+	cFrom.Invoke(t, true, "transfer", to.ScriptHash(), "neo.com", nil)
+	cFrom.Invoke(t, 1, "totalSupply")
+	cFrom.Invoke(t, to.ScriptHash().BytesBE(), "ownerOf", "neo.com")
+
+	// without onNEP11Transfer
+	ctr := neotest.CompileSource(t, e.CommitteeHash,
+		strings.NewReader(`package foo
+			func Main() int { return 0 }`),
+		&compiler.Options{Name: "foo"})
+	e.DeployContract(t, ctr, nil)
+	cTo.InvokeFail(t, "method not found", "transfer", ctr.Hash, []byte("neo.com"), nil)
+
+	// with onNEP11Transfer
+	ctr = neotest.CompileSource(t, e.CommitteeHash,
+		strings.NewReader(`package foo
+			import "github.com/nspcc-dev/neo-go/pkg/interop"
+			func OnNEP11Payment(from interop.Hash160, amount int, token []byte, data interface{}) {}`),
+		&compiler.Options{Name: "foo"})
+	e.DeployContract(t, ctr, nil)
+	cTo.Invoke(t, true, "transfer", ctr.Hash, []byte("neo.com"), nil)
+	cFrom.Invoke(t, 1, "totalSupply")
+	cFrom.Invoke(t, ctr.Hash.BytesBE(), "ownerOf", []byte("neo.com"))
+}
+
+func TestTokensOf(t *testing.T) {
+	c := newNSClient(t)
+	e := c.Executor
+
+	acc1 := e.NewAccount(t)
+	cAcc1 := c.WithSigners(acc1)
+	acc2 := e.NewAccount(t)
+	cAcc2 := c.WithSigners(acc2)
+
+	c.Invoke(t, stackitem.Null{}, "addRoot", "com")
+	cAcc1.Invoke(t, true, "register", "neo.com", acc1.ScriptHash())
+	cAcc2.Invoke(t, true, "register", "nspcc.com", acc2.ScriptHash())
+
+	testTokensOf(t, c, [][]byte{[]byte("neo.com")}, acc1.ScriptHash().BytesBE())
+	testTokensOf(t, c, [][]byte{[]byte("nspcc.com")}, acc2.ScriptHash().BytesBE())
+	testTokensOf(t, c, [][]byte{[]byte("neo.com"), []byte("nspcc.com")})
+	testTokensOf(t, c, [][]byte{}, util.Uint160{}.BytesBE()) // empty hash is a valid hash still
+}
+
+func testTokensOf(t *testing.T, c *neotest.ContractInvoker, result [][]byte, args ...interface{}) {
+	method := "tokensOf"
+	if len(args) == 0 {
+		method = "tokens"
+	}
+	s, err := c.TestInvoke(t, method, args...)
+	if result == nil {
+		require.Error(t, err)
+		return
+	}
+	require.NoError(t, err)
+	iter := s.Pop().Interop().Value().(*storage.Iterator)
+	arr := make([]stackitem.Item, 0, len(result))
+	for i := range result {
+		require.True(t, iter.Next())
+		require.Equal(t, result[i], iter.Value().Value())
+		arr = append(arr, stackitem.Make(result[i]))
+	}
+	require.False(t, iter.Next())
+}
+
+func TestResolve(t *testing.T) {
+	c := newNSClient(t)
+	e := c.Executor
+
+	acc := e.NewAccount(t)
+	cAcc := c.WithSigners(acc)
+
+	c.Invoke(t, stackitem.Null{}, "addRoot", "com")
+	cAcc.Invoke(t, true, "register", "neo.com", acc.ScriptHash())
+	cAcc.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.A), "1.2.3.4")
+	cAcc.Invoke(t, stackitem.Null{}, "setRecord", "neo.com", int64(nns.CNAME), "alias.com")
+
+	cAcc.Invoke(t, true, "register", "alias.com", acc.ScriptHash())
+	cAcc.Invoke(t, stackitem.Null{}, "setRecord", "alias.com", int64(nns.TXT), "sometxt")
+
+	c.Invoke(t, "1.2.3.4", "resolve", "neo.com", int64(nns.A))
+	c.Invoke(t, "alias.com", "resolve", "neo.com", int64(nns.CNAME))
+	c.Invoke(t, "sometxt", "resolve", "neo.com", int64(nns.TXT))
+	c.Invoke(t, stackitem.Null{}, "resolve", "neo.com", int64(nns.AAAA))
+}
+
+const (
+	defaultNameServiceDomainPrice = 10_0000_0000
+	defaultNameServiceSysfee      = 6000_0000
+)

pkg/core/helper_test.go

@@ -52,28 +52,6 @@ var neoOwner = testchain.MultisigScriptHash()
 // examplesPrefix is a prefix of the example smart-contracts.
 const examplesPrefix = "../../examples/"
 
-// newTestChainWithNS should be called before newBlock invocation to properly setup
-// global state.
-func newTestChainWithNS(t *testing.T) (*Blockchain, util.Uint160) {
-	bc := newTestChainWithCustomCfg(t, nil)
-	acc := newAccountWithGAS(t, bc)
-	// Push NameService contract into the chain.
-	nsPath := examplesPrefix + "nft-nd-nns/"
-	nsConfigPath := nsPath + "nns.yml"
-	txDeploy4, _ := newDeployTx(t, bc, acc.PrivateKey().GetScriptHash(), nsPath, nsPath, &nsConfigPath)
-	txDeploy4.Nonce = 123
-	txDeploy4.ValidUntilBlock = bc.BlockHeight() + 1
-	require.NoError(t, addNetworkFee(bc, txDeploy4, acc))
-	require.NoError(t, acc.SignTx(testchain.Network(), txDeploy4))
-	b := bc.newBlock(txDeploy4)
-	require.NoError(t, bc.AddBlock(b))
-	checkTxHalt(t, bc, txDeploy4.Hash())
-
-	h, err := bc.GetContractScriptHash(1)
-	require.NoError(t, err)
-	return bc, h
-}
-
 // newTestChain should be called before newBlock invocation to properly setup
 // global state.
 func newTestChain(t testing.TB) *Blockchain {
@@ -488,15 +466,15 @@ func initBasicChain(t *testing.T, bc *Blockchain) {
 
 	// register `neo.com` with A record type and priv0 owner via NS
 	transferFundsToCommittee(t, bc) // block #12
-	res, err := invokeContractMethodGeneric(bc, defaultNameServiceSysfee,
+	res, err := invokeContractMethodGeneric(bc, -1,
 		nsHash, "addRoot", true, "com") // block #13
 	require.NoError(t, err)
 	checkResult(t, res, stackitem.Null{})
-	res, err = invokeContractMethodGeneric(bc, defaultNameServiceDomainPrice+defaultNameServiceSysfee+1_0000_000,
+	res, err = invokeContractMethodGeneric(bc, -1,
 		nsHash, "register", acc0, "neo.com", priv0ScriptHash) // block #14
 	require.NoError(t, err)
 	checkResult(t, res, stackitem.NewBool(true))
-	res, err = invokeContractMethodGeneric(bc, defaultNameServiceSysfee, nsHash,
+	res, err = invokeContractMethodGeneric(bc, -1, nsHash,
 		"setRecord", acc0, "neo.com", int64(nns.A), "1.2.3.4") // block #15
 	require.NoError(t, err)
 	checkResult(t, res, stackitem.Null{})
@@ -596,22 +574,24 @@ func prepareContractMethodInvokeGeneric(chain *Blockchain, sysfee int64,
 		return nil, w.Err
 	}
 	script := w.Bytes()
-	tx := transaction.New(script, sysfee)
+	tx := transaction.New(script, 0)
 	tx.ValidUntilBlock = chain.blockHeight + 1
 	var err error
 	switch s := signer.(type) {
 	case bool:
 		if s {
 			addSigners(testchain.CommitteeScriptHash(), tx)
+			setTxSystemFee(chain, sysfee, tx)
 			err = testchain.SignTxCommittee(chain, tx)
 		} else {
 			addSigners(neoOwner, tx)
+			setTxSystemFee(chain, sysfee, tx)
 			err = testchain.SignTx(chain, tx)
 		}
 	case *wallet.Account:
-		signTxWithAccounts(chain, tx, s)
+		signTxWithAccounts(chain, sysfee, tx, s)
 	case []*wallet.Account:
-		signTxWithAccounts(chain, tx, s...)
+		signTxWithAccounts(chain, sysfee, tx, s...)
 	default:
 		panic("invalid signer")
 	}
@@ -621,7 +601,31 @@ func prepareContractMethodInvokeGeneric(chain *Blockchain, sysfee int64,
 	return tx, nil
 }
 
-func signTxWithAccounts(chain *Blockchain, tx *transaction.Transaction, accs ...*wallet.Account) {
+func setTxSystemFee(bc *Blockchain, sysFee int64, tx *transaction.Transaction) {
+	if sysFee >= 0 {
+		tx.SystemFee = sysFee
+		return
+	}
+
+	lastBlock := bc.topBlock.Load().(*block.Block)
+	b := &block.Block{
+		Header: block.Header{
+			Index:     lastBlock.Index + 1,
+			Timestamp: lastBlock.Timestamp + 1000,
+		},
+		Transactions: []*transaction.Transaction{tx},
+	}
+
+	ttx := *tx // prevent setting 'hash' field
+	v, f := bc.GetTestVM(trigger.Application, &ttx, b)
+	defer f()
+
+	v.LoadWithFlags(tx.Script, callflag.All)
+	_ = v.Run()
+	tx.SystemFee = v.GasConsumed()
+}
+
+func signTxWithAccounts(chain *Blockchain, sysFee int64, tx *transaction.Transaction, accs ...*wallet.Account) {
 	scope := transaction.CalledByEntry
 	for _, acc := range accs {
 		accH, _ := address.StringToUint160(acc.Address)
@@ -631,6 +635,7 @@ func signTxWithAccounts(chain *Blockchain, tx *transaction.Transaction, accs ...
 		})
 		scope = transaction.Global
 	}
+	setTxSystemFee(chain, sysFee, tx)
 	size := io.GetVarSize(tx)
 	for _, acc := range accs {
 		if acc.Contract.Deployed {

pkg/core/native_neo_test.go

@@ -469,3 +469,10 @@ func TestNEO_TransferZeroWithNonZeroBalance(t *testing.T) {
 		check(t, false)
 	})
 }
+
+func newAccountWithGAS(t *testing.T, bc *Blockchain) *wallet.Account {
+	acc, err := wallet.NewAccount()
+	require.NoError(t, err)
+	transferTokenFromMultisigAccount(t, bc, acc.PrivateKey().GetScriptHash(), bc.contracts.GAS.Hash, 1000_00000000)
+	return acc
+}

pkg/core/nonnative_name_service_test.go

@@ -1,470 +0,0 @@
-package core
-
-import (
-	"testing"
-
-	nns "github.com/nspcc-dev/neo-go/examples/nft-nd-nns"
-	"github.com/nspcc-dev/neo-go/internal/testchain"
-	"github.com/nspcc-dev/neo-go/pkg/core/block"
-	"github.com/nspcc-dev/neo-go/pkg/core/interop/interopnames"
-	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
-	"github.com/nspcc-dev/neo-go/pkg/io"
-	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
-	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
-	"github.com/nspcc-dev/neo-go/pkg/util"
-	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
-	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
-	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
-	"github.com/nspcc-dev/neo-go/pkg/wallet"
-	"github.com/stretchr/testify/require"
-)
-
-func TestNameService_Price(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	testGetSet(t, bc, nsHash, "Price",
-		defaultNameServiceDomainPrice, 0, 10000_00000000)
-}
-
-func TestNonfungible(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	acc := newAccountWithGAS(t, bc)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc, "symbol", "NNS")
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc, "decimals", 0)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc, "totalSupply", 0)
-}
-
-func TestAddRoot(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	transferFundsToCommittee(t, bc)
-
-	t.Run("invalid format", func(t *testing.T) {
-		testNameServiceInvoke(t, bc, nsHash, "addRoot", nil, "")
-	})
-	t.Run("not signed by committee", func(t *testing.T) {
-		aer, err := invokeContractMethod(bc, 1000_0000, nsHash, "addRoot", "some")
-		require.NoError(t, err)
-		checkFAULTState(t, aer)
-	})
-
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "some")
-	t.Run("already exists", func(t *testing.T) {
-		testNameServiceInvoke(t, bc, nsHash, "addRoot", nil, "some")
-	})
-}
-
-func TestExpiration(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	transferFundsToCommittee(t, bc)
-	acc := newAccountWithGAS(t, bc)
-
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "com")
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, acc, "register",
-		true, "first.com", acc.Contract.ScriptHash())
-
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc,
-		"setRecord", stackitem.Null{}, "first.com", int64(nns.TXT), "sometext")
-	b1 := bc.topBlock.Load().(*block.Block)
-
-	tx, err := prepareContractMethodInvokeGeneric(bc, defaultRegisterSysfee, nsHash,
-		"register", acc, "second.com", acc.Contract.ScriptHash())
-	require.NoError(t, err)
-	b2 := newBlockCustom(bc.GetConfig(), func(b *block.Block) {
-		b.Index = b1.Index + 1
-		b.PrevHash = b1.Hash()
-		b.Timestamp = b1.Timestamp + 10000
-	}, tx)
-	require.NoError(t, bc.AddBlock(b2))
-	checkTxHalt(t, bc, tx.Hash())
-
-	tx, err = prepareContractMethodInvokeGeneric(bc, defaultNameServiceSysfee, nsHash,
-		"isAvailable", acc, "first.com")
-	require.NoError(t, err)
-	b3 := newBlockCustom(bc.GetConfig(), func(b *block.Block) {
-		b.Index = b2.Index + 1
-		b.PrevHash = b2.Hash()
-		b.Timestamp = b1.Timestamp + (millisecondsInYear + 1)
-	}, tx)
-	require.NoError(t, bc.AddBlock(b3))
-	aer, err := bc.GetAppExecResults(tx.Hash(), trigger.Application)
-	require.NoError(t, err)
-	checkResult(t, &aer[0], stackitem.NewBool(true))
-
-	tx, err = prepareContractMethodInvokeGeneric(bc, defaultNameServiceSysfee, nsHash,
-		"isAvailable", acc, "second.com")
-	require.NoError(t, err)
-	b4 := newBlockCustom(bc.GetConfig(), func(b *block.Block) {
-		b.Index = b3.Index + 1
-		b.PrevHash = b3.Hash()
-		b.Timestamp = b3.Timestamp + 1000
-	}, tx)
-	require.NoError(t, bc.AddBlock(b4))
-	aer, err = bc.GetAppExecResults(tx.Hash(), trigger.Application)
-	require.NoError(t, err)
-	checkResult(t, &aer[0], stackitem.NewBool(false))
-
-	tx, err = prepareContractMethodInvokeGeneric(bc, defaultNameServiceSysfee, nsHash,
-		"getRecord", acc, "first.com", int64(nns.TXT))
-	require.NoError(t, err)
-	b5 := newBlockCustom(bc.GetConfig(), func(b *block.Block) {
-		b.Index = b4.Index + 1
-		b.PrevHash = b4.Hash()
-		b.Timestamp = b4.Timestamp + 1000
-	}, tx)
-	require.NoError(t, bc.AddBlock(b5))
-	aer, err = bc.GetAppExecResults(tx.Hash(), trigger.Application)
-	require.NoError(t, err)
-	checkFAULTState(t, &aer[0]) // name has expired (panic)
-}
-
-const millisecondsInYear = 365 * 24 * 3600 * 1000
-
-func TestRegisterAndRenew(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	transferFundsToCommittee(t, bc)
-
-	testNameServiceInvoke(t, bc, nsHash, "isAvailable", nil, "neo.com")
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "org")
-	testNameServiceInvoke(t, bc, nsHash, "isAvailable", nil, "neo.com")
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "com")
-	testNameServiceInvoke(t, bc, nsHash, "isAvailable", true, "neo.com")
-	testNameServiceInvoke(t, bc, nsHash, "register", nil, "neo.org", testchain.CommitteeScriptHash())
-	testNameServiceInvoke(t, bc, nsHash, "register", nil, "docs.neo.org", testchain.CommitteeScriptHash())
-	testNameServiceInvoke(t, bc, nsHash, "register", nil, "\nneo.com'", testchain.CommitteeScriptHash())
-	testNameServiceInvoke(t, bc, nsHash, "register", nil, "neo.com\n", testchain.CommitteeScriptHash())
-	testNameServiceInvoke(t, bc, nsHash, "register", nil, "neo.com", testchain.CommitteeScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceDomainPrice, true, "register",
-		nil, "neo.com", testchain.CommitteeScriptHash())
-
-	testNameServiceInvoke(t, bc, nsHash, "isAvailable", true, "neo.com")
-	testNameServiceInvoke(t, bc, nsHash, "balanceOf", 0, testchain.CommitteeScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, true, "register",
-		true, "neo.com", testchain.CommitteeScriptHash())
-	topBlock := bc.topBlock.Load().(*block.Block)
-	expectedExpiration := topBlock.Timestamp + millisecondsInYear
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, true, "register",
-		false, "neo.com", testchain.CommitteeScriptHash())
-	testNameServiceInvoke(t, bc, nsHash, "isAvailable", false, "neo.com")
-
-	props := stackitem.NewMap()
-	props.Add(stackitem.Make("name"), stackitem.Make("neo.com"))
-	props.Add(stackitem.Make("expiration"), stackitem.Make(expectedExpiration))
-	testNameServiceInvoke(t, bc, nsHash, "properties", props, "neo.com")
-	testNameServiceInvoke(t, bc, nsHash, "balanceOf", 1, testchain.CommitteeScriptHash())
-	testNameServiceInvoke(t, bc, nsHash, "ownerOf", testchain.CommitteeScriptHash().BytesBE(), []byte("neo.com"))
-
-	t.Run("invalid token ID", func(t *testing.T) {
-		testNameServiceInvoke(t, bc, nsHash, "properties", nil, "not.exists")
-		testNameServiceInvoke(t, bc, nsHash, "ownerOf", nil, "not.exists")
-		testNameServiceInvoke(t, bc, nsHash, "properties", nil, []interface{}{})
-		testNameServiceInvoke(t, bc, nsHash, "ownerOf", nil, []interface{}{})
-	})
-
-	// Renew
-	expectedExpiration += millisecondsInYear
-	testNameServiceInvokeAux(t, bc, nsHash, 100_0000_0000, true, "renew", expectedExpiration, "neo.com")
-
-	props.Add(stackitem.Make("expiration"), stackitem.Make(expectedExpiration))
-	testNameServiceInvoke(t, bc, nsHash, "properties", props, "neo.com")
-}
-
-func TestSetGetRecord(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	transferFundsToCommittee(t, bc)
-	acc := newAccountWithGAS(t, bc)
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "com")
-
-	t.Run("set before register", func(t *testing.T) {
-		testNameServiceInvoke(t, bc, nsHash, "setRecord", nil, "neo.com", int64(nns.TXT), "sometext")
-	})
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, true, "register",
-		true, "neo.com", testchain.CommitteeScriptHash())
-	t.Run("invalid parameters", func(t *testing.T) {
-		testNameServiceInvoke(t, bc, nsHash, "setRecord", nil, "neo.com", int64(0xFF), "1.2.3.4")
-		testNameServiceInvoke(t, bc, nsHash, "setRecord", nil, "neo.com", int64(nns.A), "not.an.ip.address")
-	})
-	t.Run("invalid witness", func(t *testing.T) {
-		testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc, "setRecord", nil,
-			"neo.com", int64(nns.A), "1.2.3.4")
-	})
-	testNameServiceInvoke(t, bc, nsHash, "getRecord", stackitem.Null{}, "neo.com", int64(nns.A))
-	testNameServiceInvoke(t, bc, nsHash, "setRecord", stackitem.Null{}, "neo.com", int64(nns.A), "1.2.3.4")
-	testNameServiceInvoke(t, bc, nsHash, "getRecord", "1.2.3.4", "neo.com", int64(nns.A))
-	testNameServiceInvoke(t, bc, nsHash, "setRecord", stackitem.Null{}, "neo.com", int64(nns.A), "1.2.3.4")
-	testNameServiceInvoke(t, bc, nsHash, "getRecord", "1.2.3.4", "neo.com", int64(nns.A))
-	testNameServiceInvoke(t, bc, nsHash, "setRecord", stackitem.Null{}, "neo.com", int64(nns.AAAA), "2001:0201:1f1f:0000:0000:0100:11a0:11df")
-	testNameServiceInvoke(t, bc, nsHash, "setRecord", stackitem.Null{}, "neo.com", int64(nns.CNAME), "nspcc.ru")
-	testNameServiceInvoke(t, bc, nsHash, "setRecord", stackitem.Null{}, "neo.com", int64(nns.TXT), "sometext")
-
-	// Delete record.
-	t.Run("invalid witness", func(t *testing.T) {
-		testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc, "setRecord", nil,
-			"neo.com", int64(nns.CNAME))
-	})
-	testNameServiceInvoke(t, bc, nsHash, "getRecord", "nspcc.ru", "neo.com", int64(nns.CNAME))
-	testNameServiceInvoke(t, bc, nsHash, "deleteRecord", stackitem.Null{}, "neo.com", int64(nns.CNAME))
-	testNameServiceInvoke(t, bc, nsHash, "getRecord", stackitem.Null{}, "neo.com", int64(nns.CNAME))
-	testNameServiceInvoke(t, bc, nsHash, "getRecord", "1.2.3.4", "neo.com", int64(nns.A))
-
-	t.Run("SetRecord_compatibility", func(t *testing.T) {
-		// tests are got from the NNS C# implementation and changed accordingly to non-native implementation behaviour
-		testCases := []struct {
-			Type       nns.RecordType
-			Name       string
-			ShouldFail bool
-		}{
-			{Type: nns.A, Name: "0.0.0.0", ShouldFail: true},
-			{Type: nns.A, Name: "1.1.0.1"},
-			{Type: nns.A, Name: "10.10.10.10", ShouldFail: true},
-			{Type: nns.A, Name: "255.255.255.255", ShouldFail: true},
-			{Type: nns.A, Name: "192.168.1.1", ShouldFail: true},
-			{Type: nns.A, Name: "1a", ShouldFail: true},
-			{Type: nns.A, Name: "256.0.0.0", ShouldFail: true},
-			{Type: nns.A, Name: "01.01.01.01", ShouldFail: true},
-			{Type: nns.A, Name: "00.0.0.0", ShouldFail: true},
-			{Type: nns.A, Name: "0.0.0.-1", ShouldFail: true},
-			{Type: nns.A, Name: "0.0.0.0.1", ShouldFail: true},
-			{Type: nns.A, Name: "11111111.11111111.11111111.11111111", ShouldFail: true},
-			{Type: nns.A, Name: "11111111.11111111.11111111.11111111", ShouldFail: true},
-			{Type: nns.A, Name: "ff.ff.ff.ff", ShouldFail: true},
-			{Type: nns.A, Name: "0.0.256", ShouldFail: true},
-			{Type: nns.A, Name: "0.0.0", ShouldFail: true},
-			{Type: nns.A, Name: "0.257", ShouldFail: true},
-			{Type: nns.A, Name: "1.1", ShouldFail: true},
-			{Type: nns.A, Name: "257", ShouldFail: true},
-			{Type: nns.A, Name: "1", ShouldFail: true},
-			// {2000} & {2001} & ]2002, 3ffe[ & {3fff} are valid values for IPv6 fragment0
-			{Type: nns.AAAA, Name: "2002:db8::8:800:200c:417a", ShouldFail: true},
-			{Type: nns.AAAA, Name: "3ffd:1b8::8:800:200c:417a"},
-			{Type: nns.AAAA, Name: "3ffd::101"},
-			{Type: nns.AAAA, Name: "2003::1"},
-			{Type: nns.AAAA, Name: "2003::"},
-			{Type: nns.AAAA, Name: "2002:db8:0:0:8:800:200c:417a", ShouldFail: true},
-			{Type: nns.AAAA, Name: "3ffd:db8:0:0:8:800:200c:417a"},
-			{Type: nns.AAAA, Name: "3ffd:0:0:0:0:0:0:101"},
-			{Type: nns.AAAA, Name: "2002:0:0:0:0:0:0:101", ShouldFail: true},
-			{Type: nns.AAAA, Name: "3ffd:0:0:0:0:0:0:101"},
-			{Type: nns.AAAA, Name: "2001:200:0:0:0:0:0:1"},
-			{Type: nns.AAAA, Name: "0:0:0:0:0:0:0:1", ShouldFail: true},
-			{Type: nns.AAAA, Name: "2002:0:0:0:0:0:0:1", ShouldFail: true},
-			{Type: nns.AAAA, Name: "2001:200:0:0:0:0:0:0"},
-			{Type: nns.AAAA, Name: "2002:0:0:0:0:0:0:0", ShouldFail: true},
-			{Type: nns.AAAA, Name: "2002:DB8::8:800:200C:417A", ShouldFail: true},
-			{Type: nns.AAAA, Name: "3FFD:1B8::8:800:200C:417A"},
-			{Type: nns.AAAA, Name: "3FFD::101"},
-			{Type: nns.AAAA, Name: "3fFD::101"},
-			{Type: nns.AAAA, Name: "2002:DB8:0:0:8:800:200C:417A", ShouldFail: true},
-			{Type: nns.AAAA, Name: "3FFD:DB8:0:0:8:800:200C:417A"},
-			{Type: nns.AAAA, Name: "3FFD:0:0:0:0:0:0:101"},
-			{Type: nns.AAAA, Name: "3FFD::ffff:1.01.1.01", ShouldFail: true},
-			{Type: nns.AAAA, Name: "2001:DB8:0:0:8:800:200C:4Z", ShouldFail: true},
-			{Type: nns.AAAA, Name: "2001::13.1.68.3", ShouldFail: true},
-		}
-		for _, testCase := range testCases {
-			var expected interface{}
-			if testCase.ShouldFail {
-				expected = nil
-			} else {
-				expected = stackitem.Null{}
-			}
-			t.Run(testCase.Name, func(t *testing.T) {
-				testNameServiceInvoke(t, bc, nsHash, "setRecord", expected, "neo.com", int64(testCase.Type), testCase.Name)
-			})
-		}
-	})
-}
-
-func TestSetAdmin(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	transferFundsToCommittee(t, bc)
-	owner := newAccountWithGAS(t, bc)
-	admin := newAccountWithGAS(t, bc)
-	guest := newAccountWithGAS(t, bc)
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "com")
-
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, owner, "register", true,
-		"neo.com", owner.PrivateKey().GetScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, guest, "setAdmin", nil,
-		"neo.com", admin.PrivateKey().GetScriptHash())
-
-	// Must be witnessed by both owner and admin.
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, owner, "setAdmin", nil,
-		"neo.com", admin.PrivateKey().GetScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, admin, "setAdmin", nil,
-		"neo.com", admin.PrivateKey().GetScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, []*wallet.Account{owner, admin},
-		"setAdmin", stackitem.Null{},
-		"neo.com", admin.PrivateKey().GetScriptHash())
-
-	t.Run("set and delete by admin", func(t *testing.T) {
-		testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, admin, "setRecord", stackitem.Null{},
-			"neo.com", int64(nns.TXT), "sometext")
-		testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, guest, "deleteRecord", nil,
-			"neo.com", int64(nns.TXT))
-		testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, admin, "deleteRecord", stackitem.Null{},
-			"neo.com", int64(nns.TXT))
-	})
-
-	t.Run("set admin to null", func(t *testing.T) {
-		testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, admin, "setRecord", stackitem.Null{},
-			"neo.com", int64(nns.TXT), "sometext")
-		testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, owner, "setAdmin", stackitem.Null{},
-			"neo.com", nil)
-		testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, admin, "deleteRecord", nil,
-			"neo.com", int64(nns.TXT))
-	})
-}
-
-func TestTransfer(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	transferFundsToCommittee(t, bc)
-	from := newAccountWithGAS(t, bc)
-	to := newAccountWithGAS(t, bc)
-
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "com")
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, from, "register",
-		true, "neo.com", from.PrivateKey().GetScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, from, "setRecord", stackitem.Null{},
-		"neo.com", int64(nns.A), "1.2.3.4")
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, from, "transfer",
-		nil, to.Contract.ScriptHash().BytesBE(), []byte("not.exists"), nil)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, true, "transfer",
-		false, to.Contract.ScriptHash().BytesBE(), []byte("neo.com"), nil)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, from, "transfer",
-		true, to.Contract.ScriptHash().BytesBE(), []byte("neo.com"), nil)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, from, "totalSupply", 1)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, from, "ownerOf",
-		to.Contract.ScriptHash().BytesBE(), []byte("neo.com"))
-	cs, cs2 := getTestContractState(bc) // cs2 doesn't have OnNEP11Transfer
-	require.NoError(t, bc.contracts.Management.PutContractState(bc.dao, cs))
-	require.NoError(t, bc.contracts.Management.PutContractState(bc.dao, cs2))
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, to, "transfer",
-		nil, cs2.Hash.BytesBE(), []byte("neo.com"), nil)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, to, "transfer",
-		true, cs.Hash.BytesBE(), []byte("neo.com"), nil)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, from, "totalSupply", 1)
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, from, "ownerOf",
-		cs.Hash.BytesBE(), []byte("neo.com"))
-}
-
-func TestTokensOf(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	transferFundsToCommittee(t, bc)
-	acc1 := newAccountWithGAS(t, bc)
-	acc2 := newAccountWithGAS(t, bc)
-
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "com")
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, acc1, "register",
-		true, "neo.com", acc1.PrivateKey().GetScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, acc2, "register",
-		true, "nspcc.com", acc2.PrivateKey().GetScriptHash())
-
-	testTokensOf(t, bc, nsHash, acc1, [][]byte{[]byte("neo.com")}, acc1.Contract.ScriptHash().BytesBE())
-	testTokensOf(t, bc, nsHash, acc1, [][]byte{[]byte("nspcc.com")}, acc2.Contract.ScriptHash().BytesBE())
-	testTokensOf(t, bc, nsHash, acc1, [][]byte{[]byte("neo.com"), []byte("nspcc.com")})
-	testTokensOf(t, bc, nsHash, acc1, [][]byte{}, util.Uint160{}.BytesBE()) // empty hash is a valid hash still
-}
-
-func testTokensOf(t *testing.T, bc *Blockchain, nsHash util.Uint160, signer *wallet.Account, result [][]byte, args ...interface{}) {
-	method := "tokensOf"
-	if len(args) == 0 {
-		method = "tokens"
-	}
-	w := io.NewBufBinWriter()
-	emit.AppCall(w.BinWriter, nsHash, method, callflag.All, args...)
-	for range result {
-		emit.Opcodes(w.BinWriter, opcode.DUP)
-		emit.Syscall(w.BinWriter, interopnames.SystemIteratorNext)
-		emit.Opcodes(w.BinWriter, opcode.ASSERT)
-
-		emit.Opcodes(w.BinWriter, opcode.DUP)
-		emit.Syscall(w.BinWriter, interopnames.SystemIteratorValue)
-		emit.Opcodes(w.BinWriter, opcode.SWAP)
-	}
-	emit.Opcodes(w.BinWriter, opcode.DROP)
-	emit.Int(w.BinWriter, int64(len(result)))
-	emit.Opcodes(w.BinWriter, opcode.PACK)
-	require.NoError(t, w.Err)
-	script := w.Bytes()
-	tx := transaction.New(script, defaultNameServiceSysfee)
-	tx.ValidUntilBlock = bc.BlockHeight() + 1
-	signTxWithAccounts(bc, tx, signer)
-	aers, err := persistBlock(bc, tx)
-	require.NoError(t, err)
-	if result == nil {
-		checkFAULTState(t, aers[0])
-		return
-	}
-	arr := make([]stackitem.Item, 0, len(result))
-	for i := len(result) - 1; i >= 0; i-- {
-		arr = append(arr, stackitem.Make(result[i]))
-	}
-	checkResult(t, aers[0], stackitem.NewArray(arr))
-}
-
-func TestResolve(t *testing.T) {
-	bc, nsHash := newTestChainWithNS(t)
-
-	transferFundsToCommittee(t, bc)
-	acc := newAccountWithGAS(t, bc)
-
-	testNameServiceInvoke(t, bc, nsHash, "addRoot", stackitem.Null{}, "com")
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, acc, "register",
-		true, "neo.com", acc.PrivateKey().GetScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc, "setRecord", stackitem.Null{},
-		"neo.com", int64(nns.A), "1.2.3.4")
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc, "setRecord", stackitem.Null{},
-		"neo.com", int64(nns.CNAME), "alias.com")
-
-	testNameServiceInvokeAux(t, bc, nsHash, defaultRegisterSysfee, acc, "register",
-		true, "alias.com", acc.PrivateKey().GetScriptHash())
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, acc, "setRecord", stackitem.Null{},
-		"alias.com", int64(nns.TXT), "sometxt")
-
-	testNameServiceInvoke(t, bc, nsHash, "resolve", "1.2.3.4",
-		"neo.com", int64(nns.A))
-	testNameServiceInvoke(t, bc, nsHash, "resolve", "alias.com",
-		"neo.com", int64(nns.CNAME))
-	testNameServiceInvoke(t, bc, nsHash, "resolve", "sometxt",
-		"neo.com", int64(nns.TXT))
-	testNameServiceInvoke(t, bc, nsHash, "resolve", stackitem.Null{},
-		"neo.com", int64(nns.AAAA))
-}
-
-const (
-	defaultNameServiceDomainPrice = 10_0000_0000
-	defaultNameServiceSysfee      = 6000_0000
-	defaultRegisterSysfee         = 10_0000_0000 + defaultNameServiceDomainPrice
-)
-
-func testNameServiceInvoke(t *testing.T, bc *Blockchain, nsHash util.Uint160, method string, result interface{}, args ...interface{}) {
-	testNameServiceInvokeAux(t, bc, nsHash, defaultNameServiceSysfee, true, method, result, args...)
-}
-
-func testNameServiceInvokeAux(t *testing.T, bc *Blockchain, nsHash util.Uint160, sysfee int64, signer interface{}, method string, result interface{}, args ...interface{}) {
-	if sysfee < 0 {
-		sysfee = defaultNameServiceSysfee
-	}
-	aer, err := invokeContractMethodGeneric(bc, sysfee, nsHash, method, signer, args...)
-	require.NoError(t, err)
-	if result == nil {
-		checkFAULTState(t, aer)
-		return
-	}
-	checkResult(t, aer, stackitem.Make(result))
-}
-
-func newAccountWithGAS(t *testing.T, bc *Blockchain) *wallet.Account {
-	acc, err := wallet.NewAccount()
-	require.NoError(t, err)
-	transferTokenFromMultisigAccount(t, bc, acc.PrivateKey().GetScriptHash(), bc.contracts.GAS.Hash, 1000_00000000)
-	return acc
-}

pkg/neotest/account.go

@@ -0,0 +1,8 @@
+package neotest
+
+var _nonce uint32
+
+func nonce() uint32 {
+	_nonce++
+	return _nonce
+}

pkg/neotest/basic.go

@@ -0,0 +1,260 @@
+package neotest
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+
+	"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/blockchainer"
+	"github.com/nspcc-dev/neo-go/pkg/core/fee"
+	"github.com/nspcc-dev/neo-go/pkg/core/native"
+	"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
+	"github.com/nspcc-dev/neo-go/pkg/core/state"
+	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
+	"github.com/nspcc-dev/neo-go/pkg/io"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
+	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+	"github.com/nspcc-dev/neo-go/pkg/wallet"
+	"github.com/stretchr/testify/require"
+)
+
+// Executor is a wrapper over chain state.
+type Executor struct {
+	Chain         blockchainer.Blockchainer
+	Validator     Signer
+	Committee     Signer
+	CommitteeHash util.Uint160
+	Contracts     map[string]*Contract
+}
+
+// NewExecutor creates new executor instance from provided blockchain and committee.
+func NewExecutor(t *testing.T, bc blockchainer.Blockchainer, validator, committee Signer) *Executor {
+	checkMultiSigner(t, validator)
+	checkMultiSigner(t, committee)
+
+	return &Executor{
+		Chain:         bc,
+		Validator:     validator,
+		Committee:     committee,
+		CommitteeHash: committee.ScriptHash(),
+		Contracts:     make(map[string]*Contract),
+	}
+}
+
+// TopBlock returns block with the highest index.
+func (e *Executor) TopBlock(t *testing.T) *block.Block {
+	b, err := e.Chain.GetBlock(e.Chain.GetHeaderHash(int(e.Chain.BlockHeight())))
+	require.NoError(t, err)
+	return b
+}
+
+// NativeHash returns native contract hash by name.
+func (e *Executor) NativeHash(t *testing.T, name string) util.Uint160 {
+	h, err := e.Chain.GetNativeContractScriptHash(name)
+	require.NoError(t, err)
+	return h
+}
+
+// NewUnsignedTx creates new unsigned transaction which invokes method of contract with hash.
+func (e *Executor) NewUnsignedTx(t *testing.T, hash util.Uint160, method string, args ...interface{}) *transaction.Transaction {
+	w := io.NewBufBinWriter()
+	emit.AppCall(w.BinWriter, hash, method, callflag.All, args...)
+	require.NoError(t, w.Err)
+
+	script := w.Bytes()
+	tx := transaction.New(script, 0)
+	tx.Nonce = nonce()
+	tx.ValidUntilBlock = e.Chain.BlockHeight() + 1
+	return tx
+}
+
+// NewTx creates new transaction which invokes contract method.
+// Transaction is signed with signer.
+func (e *Executor) NewTx(t *testing.T, signers []Signer,
+	hash util.Uint160, method string, args ...interface{}) *transaction.Transaction {
+	tx := e.NewUnsignedTx(t, hash, method, args...)
+	return e.SignTx(t, tx, -1, signers...)
+}
+
+// SignTx signs a transaction using provided signers.
+func (e *Executor) SignTx(t *testing.T, tx *transaction.Transaction, sysFee int64, signers ...Signer) *transaction.Transaction {
+	for _, acc := range signers {
+		tx.Signers = append(tx.Signers, transaction.Signer{
+			Account: acc.ScriptHash(),
+			Scopes:  transaction.Global,
+		})
+	}
+	addNetworkFee(e.Chain, tx, signers...)
+	addSystemFee(e.Chain, tx, sysFee)
+
+	for _, acc := range signers {
+		require.NoError(t, acc.SignTx(e.Chain.GetConfig().Magic, tx))
+	}
+	return tx
+}
+
+// NewAccount returns new signer holding 100.0 GAS. This method advances the chain
+// by one block with a transfer transaction.
+func (e *Executor) NewAccount(t *testing.T) Signer {
+	acc, err := wallet.NewAccount()
+	require.NoError(t, err)
+
+	tx := e.NewTx(t, []Signer{e.Committee},
+		e.NativeHash(t, nativenames.Gas), "transfer",
+		e.Committee.ScriptHash(), acc.Contract.ScriptHash(), int64(100_0000_0000), nil)
+	e.AddNewBlock(t, tx)
+	e.CheckHalt(t, tx.Hash())
+	return NewSingleSigner(acc)
+}
+
+// DeployContract compiles and deploys contract to bc.
+// data is an optional argument to `_deploy`.
+// Returns hash of the deploy transaction.
+func (e *Executor) DeployContract(t *testing.T, c *Contract, data interface{}) util.Uint256 {
+	tx := e.NewDeployTx(t, e.Chain, c, data)
+	e.AddNewBlock(t, tx)
+	e.CheckHalt(t, tx.Hash())
+	return tx.Hash()
+}
+
+// CheckHalt checks that transaction persisted with HALT state.
+func (e *Executor) CheckHalt(t *testing.T, h util.Uint256, stack ...stackitem.Item) *state.AppExecResult {
+	aer, err := e.Chain.GetAppExecResults(h, trigger.Application)
+	require.NoError(t, err)
+	require.Equal(t, vm.HaltState, aer[0].VMState, aer[0].FaultException)
+	if len(stack) != 0 {
+		require.Equal(t, stack, aer[0].Stack)
+	}
+	return &aer[0]
+}
+
+// CheckFault checks that transaction persisted with FAULT state.
+// Raised exception is also checked to contain s as a substring.
+func (e *Executor) CheckFault(t *testing.T, h util.Uint256, s string) {
+	aer, err := e.Chain.GetAppExecResults(h, trigger.Application)
+	require.NoError(t, err)
+	require.Equal(t, vm.FaultState, aer[0].VMState)
+	require.True(t, strings.Contains(aer[0].FaultException, s),
+		"expected: %s, got: %s", s, aer[0].FaultException)
+}
+
+// NewDeployTx returns new deployment tx for contract signed by committee.
+func (e *Executor) NewDeployTx(t *testing.T, bc blockchainer.Blockchainer, c *Contract, data interface{}) *transaction.Transaction {
+	rawManifest, err := json.Marshal(c.Manifest)
+	require.NoError(t, err)
+
+	neb, err := c.NEF.Bytes()
+	require.NoError(t, err)
+
+	buf := io.NewBufBinWriter()
+	emit.AppCall(buf.BinWriter, bc.ManagementContractHash(), "deploy", callflag.All, neb, rawManifest, data)
+	require.NoError(t, buf.Err)
+
+	tx := transaction.New(buf.Bytes(), 100*native.GASFactor)
+	tx.Nonce = nonce()
+	tx.ValidUntilBlock = bc.BlockHeight() + 1
+	tx.Signers = []transaction.Signer{{
+		Account: e.Committee.ScriptHash(),
+		Scopes:  transaction.Global,
+	}}
+	addNetworkFee(bc, tx, e.Committee)
+	require.NoError(t, e.Committee.SignTx(netmode.UnitTestNet, tx))
+	return tx
+}
+
+func addSystemFee(bc blockchainer.Blockchainer, tx *transaction.Transaction, sysFee int64) {
+	if sysFee >= 0 {
+		tx.SystemFee = sysFee
+		return
+	}
+	v, _ := TestInvoke(bc, tx) // ignore error to support failing transactions
+	tx.SystemFee = v.GasConsumed()
+}
+
+func addNetworkFee(bc blockchainer.Blockchainer, tx *transaction.Transaction, signers ...Signer) {
+	baseFee := bc.GetPolicer().GetBaseExecFee()
+	size := io.GetVarSize(tx)
+	for _, sgr := range signers {
+		netFee, sizeDelta := fee.Calculate(baseFee, sgr.Script())
+		tx.NetworkFee += netFee
+		size += sizeDelta
+	}
+	tx.NetworkFee += int64(size) * bc.FeePerByte()
+}
+
+// NewUnsignedBlock creates new unsigned block from txs.
+func (e *Executor) NewUnsignedBlock(t *testing.T, txs ...*transaction.Transaction) *block.Block {
+	lastBlock := e.TopBlock(t)
+	b := &block.Block{
+		Header: block.Header{
+			NextConsensus: e.Validator.ScriptHash(),
+			Script: transaction.Witness{
+				VerificationScript: e.Validator.Script(),
+			},
+			Timestamp: lastBlock.Timestamp + 1,
+		},
+		Transactions: txs,
+	}
+	if e.Chain.GetConfig().StateRootInHeader {
+		b.StateRootEnabled = true
+		b.PrevStateRoot = e.Chain.GetStateModule().CurrentLocalStateRoot()
+	}
+	b.PrevHash = lastBlock.Hash()
+	b.Index = e.Chain.BlockHeight() + 1
+	b.RebuildMerkleRoot()
+	return b
+}
+
+// AddNewBlock creates a new block from provided transactions and adds it on bc.
+func (e *Executor) AddNewBlock(t *testing.T, txs ...*transaction.Transaction) *block.Block {
+	b := e.NewUnsignedBlock(t, txs...)
+	e.SignBlock(b)
+	require.NoError(t, e.Chain.AddBlock(b))
+	return b
+}
+
+// SignBlock add validators signature to b.
+func (e *Executor) SignBlock(b *block.Block) *block.Block {
+	invoc := e.Validator.SignHashable(uint32(e.Chain.GetConfig().Magic), b)
+	b.Script.InvocationScript = invoc
+	return b
+}
+
+// AddBlockCheckHalt is a convenient wrapper over AddBlock and CheckHalt.
+func (e *Executor) AddBlockCheckHalt(t *testing.T, txs ...*transaction.Transaction) *block.Block {
+	b := e.AddNewBlock(t, txs...)
+	for _, tx := range txs {
+		e.CheckHalt(t, tx.Hash())
+	}
+	return b
+}
+
+// TestInvoke creates a test VM with dummy block and executes transaction in it.
+func TestInvoke(bc blockchainer.Blockchainer, tx *transaction.Transaction) (*vm.VM, error) {
+	lastBlock, err := bc.GetBlock(bc.GetHeaderHash(int(bc.BlockHeight())))
+	if err != nil {
+		return nil, err
+	}
+	b := &block.Block{
+		Header: block.Header{
+			Index:     bc.BlockHeight() + 1,
+			Timestamp: lastBlock.Timestamp + 1,
+		},
+	}
+
+	// `GetTestVM` as well as `Run` can use transaction hash which will set cached value.
+	// This is unwanted behaviour so we explicitly copy transaction to perform execution.
+	ttx := *tx
+	v, f := bc.GetTestVM(trigger.Application, &ttx, b)
+	defer f()
+
+	v.LoadWithFlags(tx.Script, callflag.All)
+	err = v.Run()
+	return v, err
+}

pkg/neotest/chain/chain.go

@@ -0,0 +1,152 @@
+package chain
+
+import (
+	"encoding/hex"
+	"sort"
+	"testing"
+
+	"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"
+	"github.com/nspcc-dev/neo-go/pkg/core/storage"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neo-go/pkg/neotest"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
+	"github.com/nspcc-dev/neo-go/pkg/wallet"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/zap/zaptest"
+)
+
+const singleValidatorWIF = "KxyjQ8eUa4FHt3Gvioyt1Wz29cTUrE4eTqX3yFSk1YFCsPL8uNsY"
+
+// committeeWIFs is a list of unencrypted WIFs sorted by public key.
+var committeeWIFs = []string{
+	"KzfPUYDC9n2yf4fK5ro4C8KMcdeXtFuEnStycbZgX3GomiUsvX6W",
+	"KzgWE3u3EDp13XPXXuTKZxeJ3Gi8Bsm8f9ijY3ZsCKKRvZUo1Cdn",
+	singleValidatorWIF,
+	"L2oEXKRAAMiPEZukwR5ho2S6SMeQLhcK9mF71ZnF7GvT8dU4Kkgz",
+
+	// Provide 2 committee extra members so that committee address differs from
+	// the validators one.
+	"L1Tr1iq5oz1jaFaMXP21sHDkJYDDkuLtpvQ4wRf1cjKvJYvnvpAb",
+	"Kz6XTUrExy78q8f4MjDHnwz8fYYyUE8iPXwPRAkHa3qN2JcHYm7e",
+}
+
+var (
+	// committeeAcc is an account used to sign tx as a committee.
+	committeeAcc *wallet.Account
+
+	// multiCommitteeAcc contains committee accounts used in a multi-node setup.
+	multiCommitteeAcc []*wallet.Account
+
+	// multiValidatorAcc contains validator accounts used in a multi-node setup.
+	multiValidatorAcc []*wallet.Account
+
+	// standByCommittee contains list of committee public keys to use in config.
+	standByCommittee []string
+)
+
+func init() {
+	committeeAcc, _ = wallet.NewAccountFromWIF(singleValidatorWIF)
+	pubs := keys.PublicKeys{committeeAcc.PrivateKey().PublicKey()}
+	err := committeeAcc.ConvertMultisig(1, pubs)
+	if err != nil {
+		panic(err)
+	}
+
+	mc := smartcontract.GetMajorityHonestNodeCount(len(committeeWIFs))
+	mv := smartcontract.GetDefaultHonestNodeCount(4)
+	accs := make([]*wallet.Account, len(committeeWIFs))
+	pubs = make(keys.PublicKeys, len(accs))
+	for i := range committeeWIFs {
+		accs[i], _ = wallet.NewAccountFromWIF(committeeWIFs[i])
+		pubs[i] = accs[i].PrivateKey().PublicKey()
+	}
+
+	// Config entry must contain validators first in a specific order.
+	standByCommittee = make([]string, len(pubs))
+	standByCommittee[0] = hex.EncodeToString(pubs[2].Bytes())
+	standByCommittee[1] = hex.EncodeToString(pubs[0].Bytes())
+	standByCommittee[2] = hex.EncodeToString(pubs[3].Bytes())
+	standByCommittee[3] = hex.EncodeToString(pubs[1].Bytes())
+	standByCommittee[4] = hex.EncodeToString(pubs[4].Bytes())
+	standByCommittee[5] = hex.EncodeToString(pubs[5].Bytes())
+
+	multiValidatorAcc = make([]*wallet.Account, mv)
+	sort.Sort(pubs[:4])
+
+vloop:
+	for i := 0; i < mv; i++ {
+		for j := range accs {
+			if accs[j].PrivateKey().PublicKey().Equal(pubs[i]) {
+				multiValidatorAcc[i] = wallet.NewAccountFromPrivateKey(accs[j].PrivateKey())
+				err := multiValidatorAcc[i].ConvertMultisig(mv, pubs[:4])
+				if err != nil {
+					panic(err)
+				}
+				continue vloop
+			}
+		}
+		panic("invalid committee WIFs")
+	}
+
+	multiCommitteeAcc = make([]*wallet.Account, mc)
+	sort.Sort(pubs)
+
+cloop:
+	for i := 0; i < mc; i++ {
+		for j := range accs {
+			if accs[j].PrivateKey().PublicKey().Equal(pubs[i]) {
+				multiCommitteeAcc[i] = wallet.NewAccountFromPrivateKey(accs[j].PrivateKey())
+				err := multiCommitteeAcc[i].ConvertMultisig(mc, pubs)
+				if err != nil {
+					panic(err)
+				}
+				continue cloop
+			}
+		}
+		panic("invalid committee WIFs")
+	}
+}
+
+// NewSingle creates new blockchain instance with a single validator and
+// setups cleanup functions.
+func NewSingle(t *testing.T) (*core.Blockchain, neotest.Signer) {
+	protoCfg := config.ProtocolConfiguration{
+		Magic:              netmode.UnitTestNet,
+		SecondsPerBlock:    1,
+		StandbyCommittee:   []string{hex.EncodeToString(committeeAcc.PrivateKey().PublicKey().Bytes())},
+		ValidatorsCount:    1,
+		VerifyBlocks:       true,
+		VerifyTransactions: true,
+	}
+
+	st := storage.NewMemoryStore()
+	log := zaptest.NewLogger(t)
+	bc, err := core.NewBlockchain(st, protoCfg, log)
+	require.NoError(t, err)
+	go bc.Run()
+	t.Cleanup(bc.Close)
+	return bc, neotest.NewMultiSigner(committeeAcc)
+}
+
+// NewMulti creates new blockchain instance with 4 validators and 6 committee members.
+// Second return value is for validator signer, third -- for committee.
+func NewMulti(t *testing.T) (*core.Blockchain, neotest.Signer, neotest.Signer) {
+	protoCfg := config.ProtocolConfiguration{
+		Magic:              netmode.UnitTestNet,
+		SecondsPerBlock:    1,
+		StandbyCommittee:   standByCommittee,
+		ValidatorsCount:    4,
+		VerifyBlocks:       true,
+		VerifyTransactions: true,
+	}
+
+	st := storage.NewMemoryStore()
+	log := zaptest.NewLogger(t)
+	bc, err := core.NewBlockchain(st, protoCfg, log)
+	require.NoError(t, err)
+	go bc.Run()
+	t.Cleanup(bc.Close)
+	return bc, neotest.NewMultiSigner(multiValidatorAcc...), neotest.NewMultiSigner(multiCommitteeAcc...)
+}

pkg/neotest/chain/chain_test.go

@@ -0,0 +1,21 @@
+package chain
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/neotest"
+	"github.com/stretchr/testify/require"
+)
+
+// TestNewMulti checks that transaction and block is signed correctly for multi-node setup.
+func TestNewMulti(t *testing.T) {
+	bc, vAcc, cAcc := NewMulti(t)
+	e := neotest.NewExecutor(t, bc, vAcc, cAcc)
+
+	require.NotEqual(t, vAcc.ScriptHash(), cAcc.ScriptHash())
+
+	const amount = int64(10_0000_0000)
+
+	c := e.CommitteeInvoker(bc.UtilityTokenHash()).WithSigners(vAcc)
+	c.Invoke(t, true, "transfer", e.Validator.ScriptHash(), e.Committee.ScriptHash(), amount, nil)
+}

pkg/neotest/client.go

@@ -0,0 +1,83 @@
+package neotest
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+)
+
+// ContractInvoker is a client for specific contract.
+type ContractInvoker struct {
+	*Executor
+	Hash    util.Uint160
+	Signers []Signer
+}
+
+// CommitteeInvoker creates new ContractInvoker for contract with hash h.
+func (e *Executor) CommitteeInvoker(h util.Uint160) *ContractInvoker {
+	return &ContractInvoker{
+		Executor: e,
+		Hash:     h,
+		Signers:  []Signer{e.Committee},
+	}
+}
+
+// TestInvoke creates test VM and invokes method with args.
+func (c *ContractInvoker) TestInvoke(t *testing.T, method string, args ...interface{}) (*vm.Stack, error) {
+	tx := c.PrepareInvokeNoSign(t, method, args...)
+	b := c.NewUnsignedBlock(t, tx)
+	v, f := c.Chain.GetTestVM(trigger.Application, tx, b)
+	t.Cleanup(f)
+
+	v.LoadWithFlags(tx.Script, callflag.All)
+	err := v.Run()
+	return v.Estack(), err
+}
+
+// WithSigners creates new client with the provided signer.
+func (c *ContractInvoker) WithSigners(signers ...Signer) *ContractInvoker {
+	newC := *c
+	newC.Signers = signers
+	return &newC
+}
+
+// PrepareInvoke creates new invocation transaction.
+func (c *ContractInvoker) PrepareInvoke(t *testing.T, method string, args ...interface{}) *transaction.Transaction {
+	return c.Executor.NewTx(t, c.Signers, c.Hash, method, args...)
+}
+
+// PrepareInvokeNoSign creates new unsigned invocation transaction.
+func (c *ContractInvoker) PrepareInvokeNoSign(t *testing.T, method string, args ...interface{}) *transaction.Transaction {
+	return c.Executor.NewUnsignedTx(t, c.Hash, method, args...)
+}
+
+// Invoke invokes method with args, persists transaction and checks the result.
+// Returns transaction hash.
+func (c *ContractInvoker) Invoke(t *testing.T, result interface{}, method string, args ...interface{}) util.Uint256 {
+	tx := c.PrepareInvoke(t, method, args...)
+	c.AddNewBlock(t, tx)
+	c.CheckHalt(t, tx.Hash(), stackitem.Make(result))
+	return tx.Hash()
+}
+
+// InvokeWithFeeFail is like InvokeFail but sets custom system fee for the transaction.
+func (c *ContractInvoker) InvokeWithFeeFail(t *testing.T, message string, sysFee int64, method string, args ...interface{}) util.Uint256 {
+	tx := c.PrepareInvokeNoSign(t, method, args...)
+	c.Executor.SignTx(t, tx, sysFee, c.Signers...)
+	c.AddNewBlock(t, tx)
+	c.CheckFault(t, tx.Hash(), message)
+	return tx.Hash()
+}
+
+// InvokeFail invokes method with args, persists transaction and checks the error message.
+// Returns transaction hash.
+func (c *ContractInvoker) InvokeFail(t *testing.T, message string, method string, args ...interface{}) {
+	tx := c.PrepareInvoke(t, method, args...)
+	c.AddNewBlock(t, tx)
+	c.CheckFault(t, tx.Hash(), message)
+}

pkg/neotest/compile.go

@@ -0,0 +1,85 @@
+package neotest
+
+import (
+	"io"
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/cli/smartcontract"
+	"github.com/nspcc-dev/neo-go/pkg/compiler"
+	"github.com/nspcc-dev/neo-go/pkg/config"
+	"github.com/nspcc-dev/neo-go/pkg/core/state"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/nef"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/stretchr/testify/require"
+)
+
+// Contract contains contract info for deployment.
+type Contract struct {
+	Hash     util.Uint160
+	NEF      *nef.File
+	Manifest *manifest.Manifest
+}
+
+// contracts caches compiled contracts from FS across multiple tests.
+var contracts = make(map[string]*Contract)
+
+// CompileSource compiles contract from reader and returns it's NEF, manifest and hash.
+func CompileSource(t *testing.T, sender util.Uint160, src io.Reader, opts *compiler.Options) *Contract {
+	// nef.NewFile() cares about version a lot.
+	config.Version = "neotest"
+
+	avm, di, err := compiler.CompileWithDebugInfo(opts.Name, src)
+	require.NoError(t, err)
+
+	ne, err := nef.NewFile(avm)
+	require.NoError(t, err)
+
+	m, err := compiler.CreateManifest(di, opts)
+	require.NoError(t, err)
+
+	return &Contract{
+		Hash:     state.CreateContractHash(sender, ne.Checksum, m.Name),
+		NEF:      ne,
+		Manifest: m,
+	}
+}
+
+// CompileFile compiles contract from file and returns it's NEF, manifest and hash.
+func CompileFile(t *testing.T, sender util.Uint160, srcPath string, configPath string) *Contract {
+	if c, ok := contracts[srcPath]; ok {
+		return c
+	}
+
+	// nef.NewFile() cares about version a lot.
+	config.Version = "neotest"
+
+	avm, di, err := compiler.CompileWithDebugInfo(srcPath, nil)
+	require.NoError(t, err)
+
+	ne, err := nef.NewFile(avm)
+	require.NoError(t, err)
+
+	conf, err := smartcontract.ParseContractConfig(configPath)
+	require.NoError(t, err)
+
+	o := &compiler.Options{}
+	o.Name = conf.Name
+	o.ContractEvents = conf.Events
+	o.ContractSupportedStandards = conf.SupportedStandards
+	o.Permissions = make([]manifest.Permission, len(conf.Permissions))
+	for i := range conf.Permissions {
+		o.Permissions[i] = manifest.Permission(conf.Permissions[i])
+	}
+	o.SafeMethods = conf.SafeMethods
+	m, err := compiler.CreateManifest(di, o)
+	require.NoError(t, err)
+
+	c := &Contract{
+		Hash:     state.CreateContractHash(sender, ne.Checksum, m.Name),
+		NEF:      ne,
+		Manifest: m,
+	}
+	contracts[srcPath] = c
+	return c
+}

pkg/neotest/signer.go

@@ -0,0 +1,141 @@
+package neotest
+
+import (
+	"bytes"
+	"fmt"
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
+	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
+	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
+	"github.com/nspcc-dev/neo-go/pkg/wallet"
+	"github.com/stretchr/testify/require"
+)
+
+// Signer is a generic interface which can be either simple- or multi-signature signer.
+type Signer interface {
+	// ScriptHash returns signer script hash.
+	Script() []byte
+	// Script returns signer verification script.
+	ScriptHash() util.Uint160
+	// SignHashable returns invocation script for signing an item.
+	SignHashable(uint32, hash.Hashable) []byte
+	// SignTx signs a transaction.
+	SignTx(netmode.Magic, *transaction.Transaction) error
+}
+
+// signer represents simple-signature signer.
+type signer wallet.Account
+
+// multiSigner represents single multi-signature signer consisting of provided accounts.
+type multiSigner []*wallet.Account
+
+// NewSingleSigner returns multi-signature signer for the provided account.
+// It must contain exactly as many accounts as needed to sign the script.
+func NewSingleSigner(acc *wallet.Account) Signer {
+	if !vm.IsSignatureContract(acc.Contract.Script) {
+		panic("account must have simple-signature verification script")
+	}
+	return (*signer)(acc)
+}
+
+// Script implements Signer interface.
+func (s *signer) Script() []byte {
+	return (*wallet.Account)(s).Contract.Script
+}
+
+// ScriptHash implements Signer interface.
+func (s *signer) ScriptHash() util.Uint160 {
+	return (*wallet.Account)(s).Contract.ScriptHash()
+}
+
+// SignHashable implements Signer interface.
+func (s *signer) SignHashable(magic uint32, item hash.Hashable) []byte {
+	return append([]byte{byte(opcode.PUSHDATA1), 64},
+		(*wallet.Account)(s).PrivateKey().SignHashable(magic, item)...)
+}
+
+// SignTx implements Signer interface.
+func (s *signer) SignTx(magic netmode.Magic, tx *transaction.Transaction) error {
+	return (*wallet.Account)(s).SignTx(magic, tx)
+}
+
+// NewMultiSigner returns multi-signature signer for the provided account.
+// It must contain at least as many accounts as needed to sign the script.
+func NewMultiSigner(accs ...*wallet.Account) Signer {
+	if len(accs) == 0 {
+		panic("empty account list")
+	}
+	script := accs[0].Contract.Script
+	m, _, ok := vm.ParseMultiSigContract(script)
+	if !ok {
+		panic("all accounts must have multi-signature verification script")
+	}
+	if len(accs) < m {
+		panic(fmt.Sprintf("verification script requires %d signatures, "+
+			"but only %d accounts were provided", m, len(accs)))
+	}
+	for _, acc := range accs {
+		if !bytes.Equal(script, acc.Contract.Script) {
+			panic("all accounts must have equal verification script")
+		}
+	}
+
+	return multiSigner(accs[:m])
+}
+
+// ScriptHash implements Signer interface.
+func (m multiSigner) ScriptHash() util.Uint160 {
+	return m[0].Contract.ScriptHash()
+}
+
+// Script implements Signer interface.
+func (m multiSigner) Script() []byte {
+	return m[0].Contract.Script
+}
+
+// SignHashable implements Signer interface.
+func (m multiSigner) SignHashable(magic uint32, item hash.Hashable) []byte {
+	var script []byte
+	for _, acc := range m {
+		sign := acc.PrivateKey().SignHashable(magic, item)
+		script = append(script, byte(opcode.PUSHDATA1), 64)
+		script = append(script, sign...)
+	}
+	return script
+}
+
+// SignTx implements Signer interface.
+func (m multiSigner) SignTx(magic netmode.Magic, tx *transaction.Transaction) error {
+	invoc := m.SignHashable(uint32(magic), tx)
+	verif := m.Script()
+	for i := range tx.Scripts {
+		if bytes.Equal(tx.Scripts[i].VerificationScript, verif) {
+			tx.Scripts[i].InvocationScript = invoc
+			return nil
+		}
+	}
+	tx.Scripts = append(tx.Scripts, transaction.Witness{
+		InvocationScript:   invoc,
+		VerificationScript: verif,
+	})
+	return nil
+}
+
+func checkMultiSigner(t *testing.T, s Signer) {
+	accs, ok := s.(multiSigner)
+	require.True(t, ok, "expected to be a multi-signer")
+	require.True(t, len(accs) > 0, "empty multi-signer")
+
+	m := len(accs[0].Contract.Parameters)
+	require.True(t, m <= len(accs), "honest not count is too big for a multi-signer")
+
+	h := accs[0].Contract.ScriptHash()
+	for i := 1; i < len(accs); i++ {
+		require.Equal(t, m, len(accs[i].Contract.Parameters), "inconsistent multi-signer accounts")
+		require.Equal(t, h, accs[i].Contract.ScriptHash(), "inconsistent multi-signer accounts")
+	}
+}