core: move NotaryVerificationPrice to a separate package

It is needed to avoid `native` dependency in RPC client.

pkg/core/blockchain_test.go

@@ -21,6 +21,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/interopnames"
 	"github.com/nspcc-dev/neo-go/pkg/core/mempool"
 	"github.com/nspcc-dev/neo-go/pkg/core/native"
+	"github.com/nspcc-dev/neo-go/pkg/core/native/nativeprices"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/storage"
@@ -1031,7 +1032,7 @@ func TestVerifyTx(t *testing.T) {
 				fee.Opcode(bc.GetBaseExecFee(), // Notary verification script
 					opcode.PUSHDATA1, opcode.RET, // invocation script
 					opcode.PUSH0, opcode.SYSCALL, opcode.RET) + // Neo.Native.Call
-				native.NotaryVerificationPrice*bc.GetBaseExecFee() // Notary witness verification price
+				nativeprices.NotaryVerificationPrice*bc.GetBaseExecFee() // Notary witness verification price
 			tx.Scripts = []transaction.Witness{
 				{
 					InvocationScript:   append([]byte{byte(opcode.PUSHDATA1), 64}, make([]byte, 64, 64)...),

pkg/core/native/nativeprices/prices.go

@@ -0,0 +1,4 @@
+package nativeprices
+
+// NotaryVerificationPrice is the price of `verify` native Notary method.
+const NotaryVerificationPrice = 1 << 15

pkg/core/native/notary.go

@@ -12,6 +12,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/contract"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/runtime"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
+	"github.com/nspcc-dev/neo-go/pkg/core/native/nativeprices"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/storage"
@@ -41,9 +42,6 @@ type Notary struct {
 
 const (
 	notaryContractID = reservedContractID - 1
-	// NotaryVerificationPrice is the price of `verify` Notary method.
-	NotaryVerificationPrice = 1 << 15
-
 	// prefixDeposit is a prefix for storing Notary deposits.
 	prefixDeposit                 = 1
 	defaultDepositDeltaTill       = 5760
@@ -88,7 +86,7 @@ func newNotary() *Notary {
 
 	desc = newDescriptor("verify", smartcontract.BoolType,
 		manifest.NewParameter("signature", smartcontract.SignatureType))
-	md = newMethodAndPrice(n.verify, NotaryVerificationPrice, callflag.ReadStates)
+	md = newMethodAndPrice(n.verify, nativeprices.NotaryVerificationPrice, callflag.ReadStates)
 	n.AddMethod(md, desc)
 
 	desc = newDescriptor("getMaxNotValidBeforeDelta", smartcontract.IntegerType)

pkg/rpc/client/rpc.go

@@ -8,8 +8,8 @@ import (
 	"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/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/native/nativeprices"
 	"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/crypto/keys"
@@ -693,7 +693,7 @@ func (c *Client) CalculateNotaryFee(nKeys uint8) (int64, error) {
 			fee.Opcode(baseExecFee, // Notary node witness
 				opcode.PUSHDATA1, opcode.RET, // invocation script
 				opcode.PUSH0, opcode.SYSCALL, opcode.RET) + // System.Contract.CallNative
-			native.NotaryVerificationPrice*baseExecFee + // Notary witness verification price
+			nativeprices.NotaryVerificationPrice*baseExecFee + // Notary witness verification price
 			feePerByte*int64(io.GetVarSize(make([]byte, 66))) + // invocation script per-byte fee
 			feePerByte*int64(io.GetVarSize([]byte{})), // verification script per-byte fee
 		nil