// +build e2e_test

// This is a file with e2e tests for C bindings written in library.go.
// As a CGO file, it can't have `_test.go` suffix as it's not allowed by Go.
// At the same time, we don't want this file to be included in the binaries.
// This is why `e2e_test` tag was introduced. Without it, this file is excluded
// from the build. Providing this tag will include this file into the build
// and that's what is done while running e2e tests for `lib/` package.

package main

import "C"
import (
	"context"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"math/big"
	"os"
	"path/filepath"
	"reflect"
	"strconv"
	"strings"
	"sync"
	"testing"
	"time"

	gethcommon "github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/common/hexutil"
	"github.com/ethereum/go-ethereum/core"
	gethparams "github.com/ethereum/go-ethereum/params"
	"github.com/stretchr/testify/require"

	"github.com/status-im/status-go/account"
	"github.com/status-im/status-go/params"
	"github.com/status-im/status-go/sign"
	"github.com/status-im/status-go/signal"
	"github.com/status-im/status-go/static"
	. "github.com/status-im/status-go/t/utils" //nolint: golint
	"github.com/status-im/status-go/transactions"
)

const initJS = `
	var _status_catalog = {
		foo: 'bar'
	};`

var (
	zeroHash       = sign.EmptyResponse.Hex()
	testChainDir   string
	nodeConfigJSON string
)

func init() {
	testChainDir = filepath.Join(TestDataDir, TestNetworkNames[GetNetworkID()])

	nodeConfigJSON = `{
	"NetworkId": ` + strconv.Itoa(GetNetworkID()) + `,
	"DataDir": "` + testChainDir + `",
	"HTTPPort": ` + strconv.Itoa(TestConfig.Node.HTTPPort) + `,
	"WSPort": ` + strconv.Itoa(TestConfig.Node.WSPort) + `,
	"LogLevel": "INFO"
}`
}

// nolint: deadcode
func testExportedAPI(t *testing.T, done chan struct{}) {
	<-startTestNode(t)
	defer func() {
		done <- struct{}{}
	}()

	// prepare accounts
	testKeyDir := filepath.Join(testChainDir, "keystore")
	if err := ImportTestAccount(testKeyDir, GetAccount1PKFile()); err != nil {
		panic(err)
	}
	if err := ImportTestAccount(testKeyDir, GetAccount2PKFile()); err != nil {
		panic(err)
	}

	// FIXME(tiabc): All of that is done because usage of cgo is not supported in tests.
	// Probably, there should be a cleaner way, for example, test cgo bindings in e2e tests
	// separately from other internal tests.
	// FIXME(@jekamas): ATTENTION! this tests depends on each other!
	tests := []struct {
		name string
		fn   func(t *testing.T) bool
	}{
		{
			"check default configuration",
			testGetDefaultConfig,
		},
		{
			"stop/resume node",
			testStopResumeNode,
		},
		{
			"call RPC on in-proc handler",
			testCallRPC,
		},
		{
			"call private API using RPC",
			testCallRPCWithPrivateAPI,
		},
		{
			"call private API using private RPC client",
			testCallPrivateRPCWithPrivateAPI,
		},
		{
			"create main and child accounts",
			testCreateChildAccount,
		},
		{
			"verify account password",
			testVerifyAccountPassword,
		},
		{
			"recover account",
			testRecoverAccount,
		},
		{
			"account select/login",
			testAccountSelect,
		},
		{
			"account logout",
			testAccountLogout,
		},
		{
			"complete single queued transaction",
			testCompleteTransaction,
		},
		{
			"test complete multiple queued transactions",
			testCompleteMultipleQueuedTransactions,
		},
		{
			"discard single queued transaction",
			testDiscardTransaction,
		},
		{
			"test discard multiple queued transactions",
			testDiscardMultipleQueuedTransactions,
		},
		{
			"test jail invalid initialization",
			testJailInitInvalid,
		},
		{
			"test jail invalid parse",
			testJailParseInvalid,
		},
		{
			"test jail initialization",
			testJailInit,
		},
		{
			"test jailed calls",
			testJailFunctionCall,
		},
		{
			"test ExecuteJS",
			testExecuteJS,
		},
		{
			"test deprecated Parse",
			testJailParseDeprecated,
		},
	}

	for _, test := range tests {
		t.Logf("=== RUN   %s", test.name)
		if ok := test.fn(t); !ok {
			t.Logf("=== FAILED   %s", test.name)
			break
		}
	}
}

func testVerifyAccountPassword(t *testing.T) bool {
	tmpDir, err := ioutil.TempDir(os.TempDir(), "accounts")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(tmpDir) // nolint: errcheck

	if err = ImportTestAccount(tmpDir, GetAccount1PKFile()); err != nil {
		t.Fatal(err)
	}
	if err = ImportTestAccount(tmpDir, GetAccount2PKFile()); err != nil {
		t.Fatal(err)
	}

	// rename account file (to see that file's internals reviewed, when locating account key)
	accountFilePathOriginal := filepath.Join(tmpDir, GetAccount1PKFile())
	accountFilePath := filepath.Join(tmpDir, "foo"+TestConfig.Account1.Address+"bar.pk")
	if err := os.Rename(accountFilePathOriginal, accountFilePath); err != nil {
		t.Fatal(err)
	}

	response := APIResponse{}
	rawResponse := VerifyAccountPassword(
		C.CString(tmpDir),
		C.CString(TestConfig.Account1.Address),
		C.CString(TestConfig.Account1.Password))

	if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &response); err != nil {
		t.Errorf("cannot decode response (%s): %v", C.GoString(rawResponse), err)
		return false
	}
	if response.Error != "" {
		t.Errorf("unexpected error: %s", response.Error)
		return false
	}

	return true
}

func testGetDefaultConfig(t *testing.T) bool {
	networks := []struct {
		chainID        int
		refChainConfig *gethparams.ChainConfig
	}{
		{params.MainNetworkID, gethparams.MainnetChainConfig},
		{params.RopstenNetworkID, gethparams.TestnetChainConfig},
		{params.RinkebyNetworkID, gethparams.RinkebyChainConfig},
		// TODO(tiabc): The same for params.StatusChainNetworkID
	}
	for i := range networks {
		network := networks[i]

		t.Run(fmt.Sprintf("networkID=%d", network.chainID), func(t *testing.T) {
			var (
				nodeConfig  = params.NodeConfig{}
				rawResponse = GenerateConfig(C.CString("/tmp/data-folder"), C.int(network.chainID))
			)
			if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &nodeConfig); err != nil {
				t.Errorf("cannot decode response (%s): %v", C.GoString(rawResponse), err)
			}

			genesis := new(core.Genesis)
			if err := json.Unmarshal([]byte(nodeConfig.LightEthConfig.Genesis), genesis); err != nil {
				t.Error(err)
			}

			require.Equal(t, network.refChainConfig, genesis.Config)
		})
	}
	return true
}

//@TODO(adam): quarantined this test until it uses a different directory.
//nolint: deadcode
func testResetChainData(t *testing.T) bool {
	t.Skip()

	resetChainDataResponse := APIResponse{}
	rawResponse := ResetChainData()

	if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &resetChainDataResponse); err != nil {
		t.Errorf("cannot decode ResetChainData response (%s): %v", C.GoString(rawResponse), err)
		return false
	}
	if resetChainDataResponse.Error != "" {
		t.Errorf("unexpected error: %s", resetChainDataResponse.Error)
		return false
	}

	EnsureNodeSync(statusBackend.StatusNode().EnsureSync)
	testCompleteTransaction(t)

	return true
}

func testStopResumeNode(t *testing.T) bool { //nolint: gocyclo
	// to make sure that we start with empty account (which might have gotten populated during previous tests)
	if err := statusBackend.Logout(); err != nil {
		t.Fatal(err)
	}

	whisperService, err := statusBackend.StatusNode().WhisperService()
	if err != nil {
		t.Errorf("whisper service not running: %v", err)
	}

	// create an account
	address1, pubKey1, _, err := statusBackend.AccountManager().CreateAccount(TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("could not create account: %v", err)
		return false
	}
	t.Logf("account created: {address: %s, key: %s}", address1, pubKey1)

	// make sure that identity is not (yet injected)
	if whisperService.HasKeyPair(pubKey1) {
		t.Error("identity already present in whisper")
	}

	// select account
	loginResponse := APIResponse{}
	rawResponse := Login(C.CString(address1), C.CString(TestConfig.Account1.Password))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &loginResponse); err != nil {
		t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if loginResponse.Error != "" {
		t.Errorf("could not select account: %v", err)
		return false
	}
	if !whisperService.HasKeyPair(pubKey1) {
		t.Errorf("identity not injected into whisper: %v", err)
	}

	// stop and resume node, then make sure that selected account is still selected
	// nolint: dupl
	stopNodeFn := func() bool {
		response := APIResponse{}
		// FIXME(tiabc): Implement https://github.com/status-im/status-go/issues/254 to avoid
		// 9-sec timeout below after stopping the node.
		rawResponse = StopNode()

		if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &response); err != nil {
			t.Errorf("cannot decode StopNode response (%s): %v", C.GoString(rawResponse), err)
			return false
		}
		if response.Error != "" {
			t.Errorf("unexpected error: %s", response.Error)
			return false
		}

		return true
	}

	// nolint: dupl
	resumeNodeFn := func() bool {
		response := APIResponse{}
		// FIXME(tiabc): Implement https://github.com/status-im/status-go/issues/254 to avoid
		// 10-sec timeout below after resuming the node.
		rawResponse = StartNode(C.CString(nodeConfigJSON))

		if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &response); err != nil {
			t.Errorf("cannot decode StartNode response (%s): %v", C.GoString(rawResponse), err)
			return false
		}
		if response.Error != "" {
			t.Errorf("unexpected error: %s", response.Error)
			return false
		}

		return true
	}

	if !stopNodeFn() {
		return false
	}

	time.Sleep(9 * time.Second) // allow to stop

	if !resumeNodeFn() {
		return false
	}

	time.Sleep(10 * time.Second) // allow to start (instead of using blocking version of start, of filter event)

	// now, verify that we still have account logged in
	whisperService, err = statusBackend.StatusNode().WhisperService()
	if err != nil {
		t.Errorf("whisper service not running: %v", err)
	}
	if !whisperService.HasKeyPair(pubKey1) {
		t.Errorf("identity evicted from whisper on node restart: %v", err)
	}

	// additionally, let's complete transaction (just to make sure that node lives through pause/resume w/o issues)
	testCompleteTransaction(t)

	return true
}

func testCallRPC(t *testing.T) bool {
	expected := `{"jsonrpc":"2.0","id":64,"result":"0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad"}`
	rawResponse := CallRPC(C.CString(`{"jsonrpc":"2.0","method":"web3_sha3","params":["0x68656c6c6f20776f726c64"],"id":64}`))
	received := C.GoString(rawResponse)
	if expected != received {
		t.Errorf("unexpected response: expected: %v, got: %v", expected, received)
		return false
	}

	return true
}

func testCallRPCWithPrivateAPI(t *testing.T) bool {
	expected := `{"jsonrpc":"2.0","id":64,"error":{"code":-32601,"message":"The method admin_nodeInfo does not exist/is not available"}}`
	rawResponse := CallRPC(C.CString(`{"jsonrpc":"2.0","method":"admin_nodeInfo","params":[],"id":64}`))
	received := C.GoString(rawResponse)
	if expected != received {
		t.Errorf("unexpected response: expected: %v, got: %v", expected, received)
		return false
	}

	return true
}

func testCallPrivateRPCWithPrivateAPI(t *testing.T) bool {
	rawResponse := CallPrivateRPC(C.CString(`{"jsonrpc":"2.0","method":"admin_nodeInfo","params":[],"id":64}`))
	received := C.GoString(rawResponse)
	if strings.Contains(received, "error") {
		t.Errorf("unexpected response containing error: %v", received)
		return false
	}

	return true
}

func testCreateChildAccount(t *testing.T) bool { //nolint: gocyclo
	// to make sure that we start with empty account (which might get populated during previous tests)
	if err := statusBackend.Logout(); err != nil {
		t.Fatal(err)
	}

	keyStore, err := statusBackend.StatusNode().AccountKeyStore()
	if err != nil {
		t.Error(err)
		return false
	}

	// create an account
	createAccountResponse := AccountInfo{}
	rawResponse := CreateAccount(C.CString(TestConfig.Account1.Password))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &createAccountResponse); err != nil {
		t.Errorf("cannot decode CreateAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if createAccountResponse.Error != "" {
		t.Errorf("could not create account: %s", err)
		return false
	}
	address, pubKey, mnemonic := createAccountResponse.Address, createAccountResponse.PubKey, createAccountResponse.Mnemonic
	t.Logf("Account created: {address: %s, key: %s, mnemonic:%s}", address, pubKey, mnemonic)

	acct, err := account.ParseAccountString(address)
	if err != nil {
		t.Errorf("can not get account from address: %v", err)
		return false
	}

	// obtain decrypted key, and make sure that extended key (which will be used as root for sub-accounts) is present
	_, key, err := keyStore.AccountDecryptedKey(acct, TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("can not obtain decrypted account key: %v", err)
		return false
	}

	if key.ExtendedKey == nil {
		t.Error("CKD#2 has not been generated for new account")
		return false
	}

	// try creating sub-account, w/o selecting main account i.e. w/o login to main account
	createSubAccountResponse := AccountInfo{}
	rawResponse = CreateChildAccount(C.CString(""), C.CString(TestConfig.Account1.Password))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &createSubAccountResponse); err != nil {
		t.Errorf("cannot decode CreateChildAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if createSubAccountResponse.Error != account.ErrNoAccountSelected.Error() {
		t.Errorf("expected error is not returned (tried to create sub-account w/o login): %v", createSubAccountResponse.Error)
		return false
	}

	err = statusBackend.SelectAccount(address, TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("Test failed: could not select account: %v", err)
		return false
	}

	// try to create sub-account with wrong password
	createSubAccountResponse = AccountInfo{}
	rawResponse = CreateChildAccount(C.CString(""), C.CString("wrong password"))

	if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &createSubAccountResponse); err != nil {
		t.Errorf("cannot decode CreateChildAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if createSubAccountResponse.Error != "cannot retrieve a valid key for a given account: could not decrypt key with given passphrase" {
		t.Errorf("expected error is not returned (tried to create sub-account with wrong password): %v", createSubAccountResponse.Error)
		return false
	}

	// create sub-account (from implicit parent)
	createSubAccountResponse1 := AccountInfo{}
	rawResponse = CreateChildAccount(C.CString(""), C.CString(TestConfig.Account1.Password))

	if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &createSubAccountResponse1); err != nil {
		t.Errorf("cannot decode CreateChildAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if createSubAccountResponse1.Error != "" {
		t.Errorf("cannot create sub-account: %v", createSubAccountResponse1.Error)
		return false
	}

	// make sure that sub-account index automatically progresses
	createSubAccountResponse2 := AccountInfo{}
	rawResponse = CreateChildAccount(C.CString(""), C.CString(TestConfig.Account1.Password))

	if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &createSubAccountResponse2); err != nil {
		t.Errorf("cannot decode CreateChildAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if createSubAccountResponse2.Error != "" {
		t.Errorf("cannot create sub-account: %v", createSubAccountResponse2.Error)
	}

	if createSubAccountResponse1.Address == createSubAccountResponse2.Address || createSubAccountResponse1.PubKey == createSubAccountResponse2.PubKey {
		t.Error("sub-account index auto-increament failed")
		return false
	}

	// create sub-account (from explicit parent)
	createSubAccountResponse3 := AccountInfo{}
	rawResponse = CreateChildAccount(C.CString(createSubAccountResponse2.Address), C.CString(TestConfig.Account1.Password))

	if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &createSubAccountResponse3); err != nil {
		t.Errorf("cannot decode CreateChildAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if createSubAccountResponse3.Error != "" {
		t.Errorf("cannot create sub-account: %v", createSubAccountResponse3.Error)
	}

	subAccount1, subAccount2, subAccount3 := createSubAccountResponse1.Address, createSubAccountResponse2.Address, createSubAccountResponse3.Address
	subPubKey1, subPubKey2, subPubKey3 := createSubAccountResponse1.PubKey, createSubAccountResponse2.PubKey, createSubAccountResponse3.PubKey

	if subAccount1 == subAccount3 || subPubKey1 == subPubKey3 || subAccount2 == subAccount3 || subPubKey2 == subPubKey3 {
		t.Error("sub-account index auto-increament failed")
		return false
	}

	return true
}

func testRecoverAccount(t *testing.T) bool { //nolint: gocyclo
	keyStore, _ := statusBackend.StatusNode().AccountKeyStore()

	// create an account
	address, pubKey, mnemonic, err := statusBackend.AccountManager().CreateAccount(TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("could not create account: %v", err)
		return false
	}
	t.Logf("Account created: {address: %s, key: %s, mnemonic:%s}", address, pubKey, mnemonic)

	// try recovering using password + mnemonic
	recoverAccountResponse := AccountInfo{}
	rawResponse := RecoverAccount(C.CString(TestConfig.Account1.Password), C.CString(mnemonic))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &recoverAccountResponse); err != nil {
		t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if recoverAccountResponse.Error != "" {
		t.Errorf("recover account failed: %v", recoverAccountResponse.Error)
		return false
	}
	addressCheck, pubKeyCheck := recoverAccountResponse.Address, recoverAccountResponse.PubKey
	if address != addressCheck || pubKey != pubKeyCheck {
		t.Error("recover account details failed to pull the correct details")
	}

	// now test recovering, but make sure that account/key file is removed i.e. simulate recovering on a new device
	account, err := account.ParseAccountString(address)
	if err != nil {
		t.Errorf("can not get account from address: %v", err)
	}

	account, key, err := keyStore.AccountDecryptedKey(account, TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("can not obtain decrypted account key: %v", err)
		return false
	}
	extChild2String := key.ExtendedKey.String()

	if err = keyStore.Delete(account, TestConfig.Account1.Password); err != nil {
		t.Errorf("cannot remove account: %v", err)
	}

	recoverAccountResponse = AccountInfo{}
	rawResponse = RecoverAccount(C.CString(TestConfig.Account1.Password), C.CString(mnemonic))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &recoverAccountResponse); err != nil {
		t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if recoverAccountResponse.Error != "" {
		t.Errorf("recover account failed (for non-cached account): %v", recoverAccountResponse.Error)
		return false
	}
	addressCheck, pubKeyCheck = recoverAccountResponse.Address, recoverAccountResponse.PubKey
	if address != addressCheck || pubKey != pubKeyCheck {
		t.Error("recover account details failed to pull the correct details (for non-cached account)")
	}

	// make sure that extended key exists and is imported ok too
	_, key, err = keyStore.AccountDecryptedKey(account, TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("can not obtain decrypted account key: %v", err)
		return false
	}
	if extChild2String != key.ExtendedKey.String() {
		t.Errorf("CKD#2 key mismatch, expected: %s, got: %s", extChild2String, key.ExtendedKey.String())
	}

	// make sure that calling import several times, just returns from cache (no error is expected)
	recoverAccountResponse = AccountInfo{}
	rawResponse = RecoverAccount(C.CString(TestConfig.Account1.Password), C.CString(mnemonic))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &recoverAccountResponse); err != nil {
		t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if recoverAccountResponse.Error != "" {
		t.Errorf("recover account failed (for non-cached account): %v", recoverAccountResponse.Error)
		return false
	}
	addressCheck, pubKeyCheck = recoverAccountResponse.Address, recoverAccountResponse.PubKey
	if address != addressCheck || pubKey != pubKeyCheck {
		t.Error("recover account details failed to pull the correct details (for non-cached account)")
	}

	// time to login with recovered data
	whisperService, err := statusBackend.StatusNode().WhisperService()
	if err != nil {
		t.Errorf("whisper service not running: %v", err)
	}

	// make sure that identity is not (yet injected)
	if whisperService.HasKeyPair(pubKeyCheck) {
		t.Error("identity already present in whisper")
	}
	err = statusBackend.SelectAccount(addressCheck, TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("Test failed: could not select account: %v", err)
		return false
	}
	if !whisperService.HasKeyPair(pubKeyCheck) {
		t.Errorf("identity not injected into whisper: %v", err)
	}

	return true
}

func testAccountSelect(t *testing.T) bool { //nolint: gocyclo
	// test to see if the account was injected in whisper
	whisperService, err := statusBackend.StatusNode().WhisperService()
	if err != nil {
		t.Errorf("whisper service not running: %v", err)
	}

	// create an account
	address1, pubKey1, _, err := statusBackend.AccountManager().CreateAccount(TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("could not create account: %v", err)
		return false
	}
	t.Logf("Account created: {address: %s, key: %s}", address1, pubKey1)

	address2, pubKey2, _, err := statusBackend.AccountManager().CreateAccount(TestConfig.Account1.Password)
	if err != nil {
		t.Error("Test failed: could not create account")
		return false
	}
	t.Logf("Account created: {address: %s, key: %s}", address2, pubKey2)

	// make sure that identity is not (yet injected)
	if whisperService.HasKeyPair(pubKey1) {
		t.Error("identity already present in whisper")
	}

	// try selecting with wrong password
	loginResponse := APIResponse{}
	rawResponse := Login(C.CString(address1), C.CString("wrongPassword"))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &loginResponse); err != nil {
		t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if loginResponse.Error == "" {
		t.Error("select account is expected to throw error: wrong password used")
		return false
	}

	loginResponse = APIResponse{}
	rawResponse = Login(C.CString(address1), C.CString(TestConfig.Account1.Password))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &loginResponse); err != nil {
		t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if loginResponse.Error != "" {
		t.Errorf("Test failed: could not select account: %v", err)
		return false
	}
	if !whisperService.HasKeyPair(pubKey1) {
		t.Errorf("identity not injected into whisper: %v", err)
	}

	// select another account, make sure that previous account is wiped out from Whisper cache
	if whisperService.HasKeyPair(pubKey2) {
		t.Error("identity already present in whisper")
	}

	loginResponse = APIResponse{}
	rawResponse = Login(C.CString(address2), C.CString(TestConfig.Account1.Password))

	if err = json.Unmarshal([]byte(C.GoString(rawResponse)), &loginResponse); err != nil {
		t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if loginResponse.Error != "" {
		t.Errorf("Test failed: could not select account: %v", loginResponse.Error)
		return false
	}
	if !whisperService.HasKeyPair(pubKey2) {
		t.Errorf("identity not injected into whisper: %v", err)
	}
	if whisperService.HasKeyPair(pubKey1) {
		t.Error("identity should be removed, but it is still present in whisper")
	}

	return true
}

func testAccountLogout(t *testing.T) bool {
	whisperService, err := statusBackend.StatusNode().WhisperService()
	if err != nil {
		t.Errorf("whisper service not running: %v", err)
		return false
	}

	// create an account
	address, pubKey, _, err := statusBackend.AccountManager().CreateAccount(TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("could not create account: %v", err)
		return false
	}

	// make sure that identity doesn't exist (yet) in Whisper
	if whisperService.HasKeyPair(pubKey) {
		t.Error("identity already present in whisper")
		return false
	}

	// select/login
	err = statusBackend.SelectAccount(address, TestConfig.Account1.Password)
	if err != nil {
		t.Errorf("Test failed: could not select account: %v", err)
		return false
	}
	if !whisperService.HasKeyPair(pubKey) {
		t.Error("identity not injected into whisper")
		return false
	}

	logoutResponse := APIResponse{}
	rawResponse := Logout()

	if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &logoutResponse); err != nil {
		t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
		return false
	}

	if logoutResponse.Error != "" {
		t.Errorf("cannot logout: %v", logoutResponse.Error)
		return false
	}

	// now, logout and check if identity is removed indeed
	if whisperService.HasKeyPair(pubKey) {
		t.Error("identity not cleared from whisper")
		return false
	}

	return true
}

func testCompleteTransaction(t *testing.T) bool {
	signRequests := statusBackend.PendingSignRequests()

	EnsureNodeSync(statusBackend.StatusNode().EnsureSync)

	// log into account from which transactions will be sent
	if err := statusBackend.SelectAccount(TestConfig.Account1.Address, TestConfig.Account1.Password); err != nil {
		t.Errorf("cannot select account: %v. Error %q", TestConfig.Account1.Address, err)
		return false
	}

	// make sure you panic if transaction complete doesn't return
	queuedTxCompleted := make(chan struct{}, 1)
	abortPanic := make(chan struct{}, 1)
	PanicAfter(10*time.Second, abortPanic, "testCompleteTransaction")

	// replace transaction notification handler
	var txHash = ""
	signal.SetDefaultNodeNotificationHandler(func(jsonEvent string) {
		var envelope signal.Envelope
		if err := json.Unmarshal([]byte(jsonEvent), &envelope); err != nil {
			t.Errorf("cannot unmarshal event's JSON: %s. Error %q", jsonEvent, err)
			return
		}
		if envelope.Type == signal.EventSignRequestAdded {
			event := envelope.Event.(map[string]interface{})
			t.Logf("transaction queued (will be completed shortly): {id: %s}\n", event["id"].(string))

			completeTxResponse := SignRequestResult{}
			rawResponse := ApproveSignRequest(C.CString(event["id"].(string)), C.CString(TestConfig.Account1.Password))

			if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &completeTxResponse); err != nil {
				t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
			}

			if completeTxResponse.Error != "" {
				t.Errorf("cannot complete queued transaction[%v]: %v", event["id"], completeTxResponse.Error)
			}

			txHash = completeTxResponse.Hash

			t.Logf("transaction complete: https://testnet.etherscan.io/tx/%s", txHash)
			abortPanic <- struct{}{} // so that timeout is aborted
			queuedTxCompleted <- struct{}{}
		}
	})

	// this call blocks, up until Complete Transaction is called
	txCheckHash, err := statusBackend.SendTransaction(context.TODO(), transactions.SendTxArgs{
		From:  account.FromAddress(TestConfig.Account1.Address),
		To:    account.ToAddress(TestConfig.Account2.Address),
		Value: (*hexutil.Big)(big.NewInt(1000000000000)),
	})
	if err != nil {
		t.Errorf("Failed to SendTransaction: %s", err)
		return false
	}

	<-queuedTxCompleted // make sure that complete transaction handler completes its magic, before we proceed

	if txHash != txCheckHash.Hex() {
		t.Errorf("Transaction hash returned from SendTransaction is invalid: expected %s, got %s",
			txCheckHash.Hex(), txHash)
		return false
	}

	if reflect.DeepEqual(txCheckHash, gethcommon.Hash{}) {
		t.Error("Test failed: transaction was never queued or completed")
		return false
	}

	if signRequests.Count() != 0 {
		t.Error("tx queue must be empty at this point")
		return false
	}

	return true
}

func testCompleteMultipleQueuedTransactions(t *testing.T) bool { //nolint: gocyclo
	signRequests := statusBackend.PendingSignRequests()

	// log into account from which transactions will be sent
	if err := statusBackend.SelectAccount(TestConfig.Account1.Address, TestConfig.Account1.Password); err != nil {
		t.Errorf("cannot select account: %v", TestConfig.Account1.Address)
		return false
	}

	// make sure you panic if transaction complete doesn't return
	testTxCount := 3
	txIDs := make(chan string, testTxCount)
	allTestTxCompleted := make(chan struct{}, 1)

	// replace transaction notification handler
	signal.SetDefaultNodeNotificationHandler(func(jsonEvent string) {
		var txID string
		var envelope signal.Envelope
		if err := json.Unmarshal([]byte(jsonEvent), &envelope); err != nil {
			t.Errorf("cannot unmarshal event's JSON: %s", jsonEvent)
			return
		}
		if envelope.Type == signal.EventSignRequestAdded {
			event := envelope.Event.(map[string]interface{})
			txID = event["id"].(string)
			t.Logf("transaction queued (will be completed in a single call, once aggregated): {id: %s}\n", txID)

			txIDs <- txID
		}
	})

	//  this call blocks, and should return when DiscardQueuedTransaction() for a given tx id is called
	sendTx := func() {
		txHashCheck, err := statusBackend.SendTransaction(context.TODO(), transactions.SendTxArgs{
			From:  account.FromAddress(TestConfig.Account1.Address),
			To:    account.ToAddress(TestConfig.Account2.Address),
			Value: (*hexutil.Big)(big.NewInt(1000000000000)),
		})
		if err != nil {
			t.Errorf("unexpected error thrown: %v", err)
			return
		}

		if reflect.DeepEqual(txHashCheck, gethcommon.Hash{}) {
			t.Error("transaction returned empty hash")
			return
		}
	}

	// wait for transactions, and complete them in a single call
	completeTxs := func(txIDStrings string) {
		var parsedIDs []string
		if err := json.Unmarshal([]byte(txIDStrings), &parsedIDs); err != nil {
			t.Error(err)
			return
		}

		parsedIDs = append(parsedIDs, "invalid-tx-id")
		updatedTxIDStrings, _ := json.Marshal(parsedIDs)

		// complete
		resultsString := ApproveSignRequests(C.CString(string(updatedTxIDStrings)), C.CString(TestConfig.Account1.Password))
		resultsStruct := SignRequestsResult{}
		if err := json.Unmarshal([]byte(C.GoString(resultsString)), &resultsStruct); err != nil {
			t.Error(err)
			return
		}
		results := resultsStruct.Results

		if len(results) != (testTxCount+1) || results["invalid-tx-id"].Error != sign.ErrSignReqNotFound.Error() {
			t.Errorf("cannot complete txs: %v", results)
			return
		}
		for txID, txResult := range results {
			if txID != txResult.ID {
				t.Errorf("tx id not set in result: expected id is %s", txID)
				return
			}
			if txResult.Error != "" && txID != "invalid-tx-id" {
				t.Errorf("invalid error for %s", txID)
				return
			}
			if txResult.Hash == zeroHash && txID != "invalid-tx-id" {
				t.Errorf("invalid hash (expected non empty hash): %s", txID)
				return
			}

			if txResult.Hash != zeroHash {
				t.Logf("transaction complete: https://testnet.etherscan.io/tx/%s", txResult.Hash)
			}
		}

		time.Sleep(1 * time.Second) // make sure that tx complete signal propagates
		for _, txID := range parsedIDs {
			if signRequests.Has(string(txID)) {
				t.Errorf("txqueue should not have test tx at this point (it should be completed): %s", txID)
				return
			}
		}
	}
	go func() {
		var txIDStrings []string
		for i := 0; i < testTxCount; i++ {
			txIDStrings = append(txIDStrings, <-txIDs)
		}

		txIDJSON, _ := json.Marshal(txIDStrings)
		completeTxs(string(txIDJSON))
		allTestTxCompleted <- struct{}{}
	}()

	// send multiple transactions
	for i := 0; i < testTxCount; i++ {
		go sendTx()
	}

	select {
	case <-allTestTxCompleted:
		// pass
	case <-time.After(20 * time.Second):
		t.Error("test timed out")
		return false
	}

	if signRequests.Count() != 0 {
		t.Error("tx queue must be empty at this point")
		return false
	}

	return true
}

func testDiscardTransaction(t *testing.T) bool { //nolint: gocyclo
	signRequests := statusBackend.PendingSignRequests()

	// log into account from which transactions will be sent
	if err := statusBackend.SelectAccount(TestConfig.Account1.Address, TestConfig.Account1.Password); err != nil {
		t.Errorf("cannot select account: %v", TestConfig.Account1.Address)
		return false
	}

	// make sure you panic if transaction complete doesn't return
	completeQueuedTransaction := make(chan struct{}, 1)
	PanicAfter(20*time.Second, completeQueuedTransaction, "testDiscardTransaction")

	// replace transaction notification handler
	var txID string
	txFailedEventCalled := make(chan struct{})
	signal.SetDefaultNodeNotificationHandler(func(jsonEvent string) {
		var envelope signal.Envelope
		if err := json.Unmarshal([]byte(jsonEvent), &envelope); err != nil {
			t.Errorf("cannot unmarshal event's JSON: %s", jsonEvent)
			return
		}
		if envelope.Type == signal.EventSignRequestAdded {
			event := envelope.Event.(map[string]interface{})
			txID = event["id"].(string)
			t.Logf("transaction queued (will be discarded soon): {id: %s}\n", txID)

			if !signRequests.Has(string(txID)) {
				t.Errorf("txqueue should still have test tx: %s", txID)
				return
			}

			// discard
			discardResponse := DiscardSignRequestResult{}
			rawResponse := DiscardSignRequest(C.CString(txID))

			if err := json.Unmarshal([]byte(C.GoString(rawResponse)), &discardResponse); err != nil {
				t.Errorf("cannot decode RecoverAccount response (%s): %v", C.GoString(rawResponse), err)
			}

			if discardResponse.Error != "" {
				t.Errorf("cannot discard tx: %v", discardResponse.Error)
				return
			}

			// try completing discarded transaction
			err := statusBackend.ApproveSignRequest(string(txID), TestConfig.Account1.Password).Error
			if err != sign.ErrSignReqNotFound {
				t.Error("expects tx not found, but call to CompleteTransaction succeeded")
				return
			}

			if signRequests.Has(string(txID)) {
				t.Errorf("txqueue should not have test tx at this point (it should be discarded): %s", txID)
				return
			}

			completeQueuedTransaction <- struct{}{} // so that timeout is aborted
		}

		if envelope.Type == signal.EventSignRequestFailed {
			event := envelope.Event.(map[string]interface{})
			t.Logf("transaction return event received: %+v\n", event)

			receivedErrMessage := event["error_message"].(string)
			expectedErrMessage := sign.ErrSignReqDiscarded.Error()
			if receivedErrMessage != expectedErrMessage {
				t.Errorf("unexpected error message received: got %v", receivedErrMessage)
				return
			}

			receivedErrCode := event["error_code"].(string)
			if receivedErrCode != strconv.Itoa(sign.SignRequestDiscardedErrorCode) {
				t.Errorf("unexpected error code received: got %v", receivedErrCode)
				return
			}

			close(txFailedEventCalled)
		}
	})

	// this call blocks, and should return when DiscardQueuedTransaction() is called
	txHashCheck, err := statusBackend.SendTransaction(context.TODO(), transactions.SendTxArgs{
		From:  account.FromAddress(TestConfig.Account1.Address),
		To:    account.ToAddress(TestConfig.Account2.Address),
		Value: (*hexutil.Big)(big.NewInt(1000000000000)),
	})

	select {
	case <-txFailedEventCalled:
	case <-time.After(time.Second * 10):
		t.Error("expected tx failure signal is not received")
		return false
	}

	if err != sign.ErrSignReqDiscarded {
		t.Errorf("expected error not thrown: %v", err)
		return false
	}

	if !reflect.DeepEqual(txHashCheck, gethcommon.Hash{}) {
		t.Error("transaction returned hash, while it shouldn't")
		return false
	}

	if signRequests.Count() != 0 {
		t.Error("tx queue must be empty at this point")
		return false
	}

	return true
}

func testDiscardMultipleQueuedTransactions(t *testing.T) bool { //nolint: gocyclo
	signRequests := statusBackend.PendingSignRequests()

	// log into account from which transactions will be sent
	if err := statusBackend.SelectAccount(TestConfig.Account1.Address, TestConfig.Account1.Password); err != nil {
		t.Errorf("cannot select account: %v", TestConfig.Account1.Address)
		return false
	}

	// make sure you panic if transaction complete doesn't return
	testTxCount := 3
	txIDs := make(chan string, testTxCount)

	var testTxDiscarded sync.WaitGroup
	testTxDiscarded.Add(testTxCount)

	// replace transaction notification handler
	signal.SetDefaultNodeNotificationHandler(func(jsonEvent string) {
		var txID string
		var envelope signal.Envelope
		if err := json.Unmarshal([]byte(jsonEvent), &envelope); err != nil {
			t.Errorf("cannot unmarshal event's JSON: %s", jsonEvent)
			return
		}
		if envelope.Type == signal.EventSignRequestAdded {
			event := envelope.Event.(map[string]interface{})
			txID = event["id"].(string)
			t.Logf("transaction queued (will be discarded soon): {id: %s}\n", txID)

			if !signRequests.Has(string(txID)) {
				t.Errorf("txqueue should still have test tx: %s", txID)
				return
			}

			txIDs <- txID
		}

		if envelope.Type == signal.EventSignRequestFailed {
			event := envelope.Event.(map[string]interface{})
			t.Logf("transaction return event received: {id: %s}\n", event["id"].(string))

			receivedErrMessage := event["error_message"].(string)
			expectedErrMessage := sign.ErrSignReqDiscarded.Error()
			if receivedErrMessage != expectedErrMessage {
				t.Errorf("unexpected error message received: got %v", receivedErrMessage)
				return
			}

			receivedErrCode := event["error_code"].(string)
			if receivedErrCode != strconv.Itoa(sign.SignRequestDiscardedErrorCode) {
				t.Errorf("unexpected error code received: got %v", receivedErrCode)
				return
			}

			testTxDiscarded.Done()
		}
	})

	// this call blocks, and should return when DiscardQueuedTransaction() for a given tx id is called
	sendTx := func() {
		txHashCheck, err := statusBackend.SendTransaction(context.TODO(), transactions.SendTxArgs{
			From:  account.FromAddress(TestConfig.Account1.Address),
			To:    account.ToAddress(TestConfig.Account2.Address),
			Value: (*hexutil.Big)(big.NewInt(1000000000000)),
		})
		if err != sign.ErrSignReqDiscarded {
			t.Errorf("expected error not thrown: %v", err)
			return
		}

		if !reflect.DeepEqual(txHashCheck, gethcommon.Hash{}) {
			t.Error("transaction returned hash, while it shouldn't")
			return
		}
	}

	// wait for transactions, and discard immediately
	discardTxs := func(txIDStrings string) {
		var parsedIDs []string
		if err := json.Unmarshal([]byte(txIDStrings), &parsedIDs); err != nil {
			t.Error(err)
			return
		}

		parsedIDs = append(parsedIDs, "invalid-tx-id")
		updatedTxIDStrings, _ := json.Marshal(parsedIDs)

		// discard
		discardResultsString := DiscardSignRequests(C.CString(string(updatedTxIDStrings)))
		discardResultsStruct := DiscardSignRequestsResult{}
		if err := json.Unmarshal([]byte(C.GoString(discardResultsString)), &discardResultsStruct); err != nil {
			t.Error(err)
			return
		}
		discardResults := discardResultsStruct.Results

		if len(discardResults) != 1 || discardResults["invalid-tx-id"].Error != sign.ErrSignReqNotFound.Error() {
			t.Errorf("cannot discard txs: %v", discardResults)
			return
		}

		// try completing discarded transaction
		completeResultsString := ApproveSignRequests(C.CString(string(updatedTxIDStrings)), C.CString(TestConfig.Account1.Password))
		completeResultsStruct := SignRequestsResult{}
		if err := json.Unmarshal([]byte(C.GoString(completeResultsString)), &completeResultsStruct); err != nil {
			t.Error(err)
			return
		}
		completeResults := completeResultsStruct.Results

		if len(completeResults) != (testTxCount + 1) {
			t.Error("unexpected number of errors (call to ApproveSignRequest should not succeed)")
		}
		for txID, txResult := range completeResults {
			if txID != txResult.ID {
				t.Errorf("tx id not set in result: expected id is %s", txID)
				return
			}
			if txResult.Error != sign.ErrSignReqNotFound.Error() {
				t.Errorf("invalid error for %s", txResult.Hash)
				return
			}
			if txResult.Hash != zeroHash {
				t.Errorf("invalid hash (expected zero): '%s'", txResult.Hash)
				return
			}
		}

		time.Sleep(1 * time.Second) // make sure that tx complete signal propagates
		for _, txID := range parsedIDs {
			if signRequests.Has(string(txID)) {
				t.Errorf("txqueue should not have test tx at this point (it should be discarded): %s", txID)
				return
			}
		}
	}
	go func() {
		var txIDStrings []string
		for i := 0; i < testTxCount; i++ {
			txIDStrings = append(txIDStrings, <-txIDs)
		}

		txIDJSON, _ := json.Marshal(txIDStrings)
		discardTxs(string(txIDJSON))
	}()

	// send multiple transactions
	for i := 0; i < testTxCount; i++ {
		go sendTx()
	}

	done := make(chan struct{})
	go func() { testTxDiscarded.Wait(); close(done) }()

	select {
	case <-done:
		// pass
	case <-time.After(20 * time.Second):
		t.Error("test timed out")
		return false
	}

	if signRequests.Count() != 0 {
		t.Error("tx queue must be empty at this point")
		return false
	}

	return true
}

func testJailInitInvalid(t *testing.T) bool {
	// Arrange.
	initInvalidCode := `
	var _status_catalog = {
		foo: 'bar'
	`

	// Act.
	InitJail(C.CString(initInvalidCode))
	response := C.GoString(CreateAndInitCell(C.CString("CHAT_ID_INIT_INVALID_TEST"), C.CString(``)))

	// Assert.
	expectedSubstr := `"error":"(anonymous): Line 4:3 Unexpected identifier`
	if !strings.Contains(response, expectedSubstr) {
		t.Errorf("unexpected response, didn't find '%s' in '%s'", expectedSubstr, response)
		return false
	}
	return true
}

func testJailParseInvalid(t *testing.T) bool {
	// Arrange.
	InitJail(C.CString(initJS))
	// Act.
	extraInvalidCode := `
	var extraFunc = function (x) {
	  return x * x;
	`
	response := C.GoString(CreateAndInitCell(C.CString("CHAT_ID_PARSE_INVALID_TEST"), C.CString(extraInvalidCode)))

	// Assert.
	expectedResponse := `{"error":"(anonymous): Line 4:2 Unexpected end of input (and 1 more errors)"}`
	if expectedResponse != response {
		t.Errorf("unexpected response, expected: %v, got: %v", expectedResponse, response)
		return false
	}
	return true
}

func testJailInit(t *testing.T) bool {
	InitJail(C.CString(initJS))

	chatID := C.CString("CHAT_ID_INIT_TEST")

	// Cell initialization return the result of the last JS operation provided to it.
	response := CreateAndInitCell(chatID, C.CString(`var extraFunc = function (x) { return x * x; }; extraFunc(2);`))
	require.Equal(t, `{"result":4}`, C.GoString(response), "Unexpected response from jail.CreateAndInitCell()")

	// Commands from the jail initialization are available in any of the created cells.
	response = ExecuteJS(chatID, C.CString(`JSON.stringify({ result: _status_catalog });`))
	require.Equal(t, `{"result":{"foo":"bar"}}`, C.GoString(response), "Environment from `InitJail` is not available in the created cell")

	return true
}

func testJailParseDeprecated(t *testing.T) bool {
	InitJail(C.CString(initJS))

	extraCode := `
		var extraFunc = function (x) {
			return x * x;
		};

		extraFunc(2);
	`
	chatID := C.CString("CHAT_ID_PARSE_TEST")

	response := Parse(chatID, C.CString(extraCode))
	require.Equal(t, `{"result":4}`, C.GoString(response))

	// cell already exists but Parse should not complain
	response = Parse(chatID, C.CString(extraCode))
	require.Equal(t, `{"result":4}`, C.GoString(response))

	// test extraCode
	response = ExecuteJS(chatID, C.CString(`extraFunc(10)`))
	require.Equal(t, `100`, C.GoString(response))

	return true
}

func testJailFunctionCall(t *testing.T) bool {
	InitJail(C.CString(""))

	// load Status JS and add test command to it
	statusJS := string(static.MustAsset("testdata/jail/status.js")) + `;
	_status_catalog.commands["testCommand"] = function (params) {
		return params.val * params.val;
	};`
	CreateAndInitCell(C.CString("CHAT_ID_CALL_TEST"), C.CString(statusJS))

	// call with wrong chat id
	rawResponse := Call(C.CString("CHAT_IDNON_EXISTENT"), C.CString(""), C.CString(""))
	parsedResponse := C.GoString(rawResponse)
	expectedError := `{"error":"cell 'CHAT_IDNON_EXISTENT' not found"}`
	if parsedResponse != expectedError {
		t.Errorf("expected error is not returned: expected %s, got %s", expectedError, parsedResponse)
		return false
	}

	// call extraFunc()
	rawResponse = Call(C.CString("CHAT_ID_CALL_TEST"), C.CString(`["commands", "testCommand"]`), C.CString(`{"val": 12}`))
	parsedResponse = C.GoString(rawResponse)
	expectedResponse := `{"result":144}`
	if parsedResponse != expectedResponse {
		t.Errorf("expected response is not returned: expected %s, got %s", expectedResponse, parsedResponse)
		return false
	}

	t.Logf("jailed method called: %s", parsedResponse)

	return true
}

func testExecuteJS(t *testing.T) bool {
	InitJail(C.CString(""))

	// cell does not exist
	response := C.GoString(ExecuteJS(C.CString("CHAT_ID_EXECUTE_TEST"), C.CString("('some string')")))
	expectedResponse := `{"error":"cell 'CHAT_ID_EXECUTE_TEST' not found"}`
	if response != expectedResponse {
		t.Errorf("expected '%s' but got '%s'", expectedResponse, response)
		return false
	}

	CreateAndInitCell(C.CString("CHAT_ID_EXECUTE_TEST"), C.CString(`var obj = { status: true }`))

	// cell does not exist
	response = C.GoString(ExecuteJS(C.CString("CHAT_ID_EXECUTE_TEST"), C.CString(`JSON.stringify(obj)`)))
	expectedResponse = `{"status":true}`
	if response != expectedResponse {
		t.Errorf("expected '%s' but got '%s'", expectedResponse, response)
		return false
	}

	return true
}

func startTestNode(t *testing.T) <-chan struct{} {
	testDir := filepath.Join(TestDataDir, TestNetworkNames[GetNetworkID()])

	syncRequired := false
	if _, err := os.Stat(testDir); os.IsNotExist(err) {
		syncRequired = true
	}

	// inject test accounts
	testKeyDir := filepath.Join(testDir, "keystore")
	if err := ImportTestAccount(testKeyDir, GetAccount1PKFile()); err != nil {
		panic(err)
	}
	if err := ImportTestAccount(testKeyDir, GetAccount2PKFile()); err != nil {
		panic(err)
	}

	waitForNodeStart := make(chan struct{}, 1)
	signal.SetDefaultNodeNotificationHandler(func(jsonEvent string) {
		t.Log(jsonEvent)
		var envelope signal.Envelope
		if err := json.Unmarshal([]byte(jsonEvent), &envelope); err != nil {
			t.Errorf("cannot unmarshal event's JSON: %s", jsonEvent)
			return
		}
		if envelope.Type == signal.EventNodeCrashed {
			signal.TriggerDefaultNodeNotificationHandler(jsonEvent)
			return
		}

		if envelope.Type == signal.EventSignRequestAdded {
		}
		if envelope.Type == signal.EventNodeStarted {
			t.Log("Node started, but we wait till it be ready")
		}
		if envelope.Type == signal.EventNodeReady {
			// sync
			if syncRequired {
				t.Logf("Sync is required")
				EnsureNodeSync(statusBackend.StatusNode().EnsureSync)
			} else {
				time.Sleep(5 * time.Second)
			}

			// now we can proceed with tests
			waitForNodeStart <- struct{}{}
		}
	})

	go func() {
		response := StartNode(C.CString(nodeConfigJSON))
		responseErr := APIResponse{}

		if err := json.Unmarshal([]byte(C.GoString(response)), &responseErr); err != nil {
			panic(err)
		}
		if responseErr.Error != "" {
			panic("cannot start node: " + responseErr.Error)
		}
	}()

	return waitForNodeStart
}

//nolint: deadcode
func testValidateNodeConfig(t *testing.T, config string, fn func(APIDetailedResponse)) {
	result := ValidateNodeConfig(C.CString(config))

	var resp APIDetailedResponse

	err := json.Unmarshal([]byte(C.GoString(result)), &resp)
	require.NoError(t, err)

	fn(resp)
}

// PanicAfter throws panic() after waitSeconds, unless abort channel receives
// notification.
func PanicAfter(waitSeconds time.Duration, abort chan struct{}, desc string) {
	go func() {
		select {
		case <-abort:
			return
		case <-time.After(waitSeconds):
			panic("whatever you were doing takes toooo long: " + desc)
		}
	}()
}