oracle: add response codes to interop defintions

Client should be aware of them.

pkg/compiler/native_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/core/native"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/nnsrecords"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
+	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/crypto"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/gas"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/ledger"
@@ -89,6 +90,18 @@ func TestCryptoLibNamedCurve(t *testing.T) {
 	require.EqualValues(t, native.Secp256r1, crypto.Secp256r1)
 }
 
+func TestOracleResponseCodes(t *testing.T) {
+	require.EqualValues(t, oracle.Success, transaction.Success)
+	require.EqualValues(t, oracle.ProtocolNotSupported, transaction.ProtocolNotSupported)
+	require.EqualValues(t, oracle.ConsensusUnreachable, transaction.ConsensusUnreachable)
+	require.EqualValues(t, oracle.NotFound, transaction.NotFound)
+	require.EqualValues(t, oracle.Timeout, transaction.Timeout)
+	require.EqualValues(t, oracle.Forbidden, transaction.Forbidden)
+	require.EqualValues(t, oracle.ResponseTooLarge, transaction.ResponseTooLarge)
+	require.EqualValues(t, oracle.InsufficientFunds, transaction.InsufficientFunds)
+	require.EqualValues(t, oracle.Error, transaction.Error)
+}
+
 type nativeTestCase struct {
 	method string
 	params []string

pkg/interop/native/oracle/oracle.go

@@ -10,6 +10,21 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/interop/contract"
 )
 
+// These are potential response codes you get in your callback completing
+// oracle request. Resulting data is only passed with Success code, it's
+// nil otherwise.
+const (
+	Success              = 0x00
+	ProtocolNotSupported = 0x10
+	ConsensusUnreachable = 0x12
+	NotFound             = 0x14
+	Timeout              = 0x16
+	Forbidden            = 0x18
+	ResponseTooLarge     = 0x1a
+	InsufficientFunds    = 0x1c
+	Error                = 0xff
+)
+
 // Hash represents Oracle contract hash.
 const Hash = "\x58\x87\x17\x11\x7e\x0a\xa8\x10\x72\xaf\xab\x71\xd2\xdd\x89\xfe\x7c\x4b\x92\xfe"