native: make Oracle service handle native Oracle updates

A part of #3213.

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

pkg/core/interop/context.go

@@ -171,7 +171,7 @@ type HFSpecificEvent struct {
 type Contract interface {
 	// Initialize performs native contract initialization on contract deploy or update.
 	// Active hardfork is passed as the second argument.
-	Initialize(*Context, *config.Hardfork) error
+	Initialize(*Context, *config.Hardfork, *HFSpecificContractMD) error
 	// ActiveIn returns the hardfork native contract is active starting from or nil in case
 	// it's always active.
 	ActiveIn() *config.Hardfork

pkg/core/native/crypto.go

@@ -310,7 +310,7 @@ func (c *Crypto) Metadata() *interop.ContractMD {
 }
 
 // Initialize implements the Contract interface.
-func (c *Crypto) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (c *Crypto) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	return nil
 }
 

pkg/core/native/designate.go

@@ -133,7 +133,7 @@ func newDesignate(p2pSigExtensionsEnabled bool, initialNodeRoles map[noderoles.R
 // Initialize initializes Designation contract. It is called once at native Management's OnPersist
 // at the genesis block, and we can't properly fill the cache at this point, as there are no roles
 // data in the storage.
-func (s *Designate) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (s *Designate) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	if hf != s.ActiveIn() {
 		return nil
 	}

pkg/core/native/ledger.go

@@ -81,7 +81,7 @@ func (l *Ledger) Metadata() *interop.ContractMD {
 }
 
 // Initialize implements the Contract interface.
-func (l *Ledger) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (l *Ledger) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	return nil
 }
 

pkg/core/native/management.go

@@ -627,7 +627,8 @@ func (m *Management) OnPersist(ic *interop.Context) error {
 			continue
 		}
 		md := native.Metadata()
-		base := md.HFSpecificContractMD(&latestHF).ContractBase
+		hfSpecificMD := md.HFSpecificContractMD(&latestHF)
+		base := hfSpecificMD.ContractBase
 		var cs *state.Contract
 		switch {
 		case isDeploy:
@@ -653,7 +654,7 @@ func (m *Management) OnPersist(ic *interop.Context) error {
 		if err != nil {
 			return fmt.Errorf("failed to put contract state: %w", err)
 		}
-		if err := native.Initialize(ic, activeIn); err != nil {
+		if err := native.Initialize(ic, activeIn, hfSpecificMD); err != nil {
 			return fmt.Errorf("initializing %s native contract at HF %d: %w", md.Name, activeIn, err)
 		}
 		if cache == nil {
@@ -728,7 +729,7 @@ func (m *Management) GetNEP17Contracts(d *dao.Simple) []util.Uint160 {
 }
 
 // Initialize implements the Contract interface.
-func (m *Management) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (m *Management) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	if hf != m.ActiveIn() {
 		return nil
 	}

pkg/core/native/management_test.go

@@ -20,9 +20,9 @@ func TestDeployGetUpdateDestroyContract(t *testing.T) {
 	mgmt.Policy = newPolicy(false)
 	d := dao.NewSimple(storage.NewMemoryStore(), false)
 	ic := &interop.Context{DAO: d}
-	err := mgmt.Initialize(ic, nil)
+	err := mgmt.Initialize(ic, nil, nil)
 	require.NoError(t, err)
-	require.NoError(t, mgmt.Policy.Initialize(&interop.Context{DAO: d}, nil))
+	require.NoError(t, mgmt.Policy.Initialize(&interop.Context{DAO: d}, nil, nil))
 	script := []byte{byte(opcode.RET)}
 	sender := util.Uint160{1, 2, 3}
 	ne, err := nef.NewFile(script)
@@ -97,9 +97,9 @@ func TestManagement_GetNEP17Contracts(t *testing.T) {
 	mgmt := newManagement()
 	mgmt.Policy = newPolicy(false)
 	d := dao.NewSimple(storage.NewMemoryStore(), false)
-	err := mgmt.Initialize(&interop.Context{DAO: d}, nil)
+	err := mgmt.Initialize(&interop.Context{DAO: d}, nil, nil)
 	require.NoError(t, err)
-	require.NoError(t, mgmt.Policy.Initialize(&interop.Context{DAO: d}, nil))
+	require.NoError(t, mgmt.Policy.Initialize(&interop.Context{DAO: d}, nil, nil))
 	err = mgmt.InitializeCache(0, d)
 	require.NoError(t, err)
 

pkg/core/native/native_gas.go

@@ -83,7 +83,7 @@ func (g *GAS) balanceFromBytes(si *state.StorageItem) (*big.Int, error) {
 }
 
 // Initialize initializes a GAS contract.
-func (g *GAS) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (g *GAS) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	if hf != g.ActiveIn() {
 		return nil
 	}

pkg/core/native/native_neo.go

@@ -286,7 +286,7 @@ func newNEO(cfg config.ProtocolConfiguration) *NEO {
 }
 
 // Initialize initializes a NEO contract.
-func (n *NEO) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (n *NEO) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	if hf != n.ActiveIn() {
 		return nil
 	}

pkg/core/native/notary.go

@@ -127,7 +127,7 @@ func (n *Notary) Metadata() *interop.ContractMD {
 }
 
 // Initialize initializes Notary native contract and implements the Contract interface.
-func (n *Notary) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (n *Notary) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	if hf != n.ActiveIn() {
 		return nil
 	}

pkg/core/native/oracle.go

@@ -246,11 +246,9 @@ func (o *Oracle) Metadata() *interop.ContractMD {
 }
 
 // Initialize initializes an Oracle contract.
-func (o *Oracle) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (o *Oracle) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
-	if hf != o.ActiveIn() {
+	switch hf {
-		return nil
+	case o.ActiveIn():
-	}
-
 		setIntWithKey(o.ID, ic.DAO, prefixRequestID, 0)
 		setIntWithKey(o.ID, ic.DAO, prefixRequestPrice, DefaultOracleRequestPrice)
 
@@ -258,6 +256,18 @@ func (o *Oracle) Initialize(ic *interop.Context, hf *config.Hardfork) error {
 			requestPrice: int64(DefaultOracleRequestPrice),
 		}
 		ic.DAO.SetCache(o.ID, cache)
+	default:
+		orc, _ := o.Module.Load().(*OracleService)
+		if orc != nil && *orc != nil {
+			md, ok := newMD.GetMethod(manifest.MethodVerify, -1)
+			if !ok {
+				panic(fmt.Errorf("%s method not found", manifest.MethodVerify))
+			}
+			(*orc).UpdateNativeContract(newMD.NEF.Script, o.GetOracleResponseScript(),
+				o.Hash, md.MD.Offset)
+		}
+	}
+
 	return nil
 }
 

pkg/core/native/policy.go

@@ -169,7 +169,7 @@ func (p *Policy) Metadata() *interop.ContractMD {
 }
 
 // Initialize initializes Policy native contract and implements the Contract interface.
-func (p *Policy) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (p *Policy) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	if hf != p.ActiveIn() {
 		return nil
 	}

pkg/core/native/std.go

@@ -439,7 +439,7 @@ func (s *Std) Metadata() *interop.ContractMD {
 }
 
 // Initialize implements the Contract interface.
-func (s *Std) Initialize(ic *interop.Context, hf *config.Hardfork) error {
+func (s *Std) Initialize(ic *interop.Context, hf *config.Hardfork, newMD *interop.HFSpecificContractMD) error {
 	return nil
 }
 

pkg/services/oracle/oracle.go

@@ -38,8 +38,9 @@ type (
 	Oracle struct {
 		Config
 
-		// This fields are readonly thus not protected by mutex.
+		// Native Oracle contract related information that may be updated on Oracle contract
-		oracleHash     util.Uint160
+		// update.
+		oracleInfoLock sync.RWMutex
 		oracleResponse []byte
 		oracleScript   []byte
 		verifyOffset   int
@@ -277,10 +278,11 @@ drain:
 
 // UpdateNativeContract updates native oracle contract info for tx verification.
 func (o *Oracle) UpdateNativeContract(script, resp []byte, h util.Uint160, verifyOffset int) {
+	o.oracleInfoLock.Lock()
+	defer o.oracleInfoLock.Unlock()
+
 	o.oracleScript = bytes.Clone(script)
 	o.oracleResponse = bytes.Clone(resp)
-
-	o.oracleHash = h
 	o.verifyOffset = verifyOffset
 }
 

pkg/services/oracle/response.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/core/fee"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop"
+	"github.com/nspcc-dev/neo-go/pkg/core/native/nativehashes"
 	"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/crypto/keys"
@@ -102,7 +103,12 @@ func checkUTF8(v []byte) ([]byte, error) {
 
 // CreateResponseTx creates an unsigned oracle response transaction.
 func (o *Oracle) CreateResponseTx(gasForResponse int64, vub uint32, resp *transaction.OracleResponse) (*transaction.Transaction, error) {
-	tx := transaction.New(o.oracleResponse, 0)
+	var respScript []byte
+	o.oracleInfoLock.RLock()
+	respScript = o.oracleResponse
+	o.oracleInfoLock.RUnlock()
+
+	tx := transaction.New(respScript, 0)
 	tx.Nonce = uint32(resp.ID)
 	tx.ValidUntilBlock = vub
 	tx.Attributes = []transaction.Attribute{{
@@ -113,7 +119,7 @@ func (o *Oracle) CreateResponseTx(gasForResponse int64, vub uint32, resp *transa
 	oracleSignContract := o.getOracleSignContract()
 	tx.Signers = []transaction.Signer{
 		{
-			Account: o.oracleHash,
+			Account: nativehashes.Oracle,
 			Scopes:  transaction.None,
 		},
 		{
@@ -166,8 +172,11 @@ func (o *Oracle) testVerify(tx *transaction.Transaction) (int64, bool, error) {
 		return 0, false, fmt.Errorf("failed to create test VM: %w", err)
 	}
 	ic.VM.GasLimit = o.Chain.GetMaxVerificationGAS()
-	ic.VM.LoadScriptWithHash(o.oracleScript, o.oracleHash, callflag.ReadOnly)
+
+	o.oracleInfoLock.RLock()
+	ic.VM.LoadScriptWithHash(o.oracleScript, nativehashes.Oracle, callflag.ReadOnly)
 	ic.VM.Context().Jump(o.verifyOffset)
+	o.oracleInfoLock.RUnlock()
 
 	ok := isVerifyOk(ic)
 	return ic.VM.GasConsumed(), ok, nil