vm: add dynamic opcode pricing

Close #4043.

Signed-off-by: Tural Devrishev <tural@nspcc.ru>

Author: Tural Devrishev

pkg/core/blockchain_neotest_test.go

@@ -2497,7 +2497,7 @@ func TestBlockchain_VerifyTx(t *testing.T) {
 				notaryServiceFeePerKey + // fee for Notary attribute
 				vm.PicoGasToDatoshi(fee.Opcode(bc.GetBaseExecFee(), // Notary verification script
 					opcode.PUSHDATA1, opcode.RET, // invocation script
-					opcode.PUSH0, opcode.SYSCALL, opcode.RET)) + // Neo.Native.Call
+					opcode.PUSH0, opcode.SYSCALL, opcode.RET)/vm.OpcodePriceMultiplier) + // Neo.Native.Call
 				vm.PicoGasToDatoshi(nativeprices.NotaryVerificationPrice*bc.GetBaseExecFee()) // Notary witness verification price
 			tx.Scripts = []transaction.Witness{
 				{

pkg/core/fee/calculate.go

@@ -19,12 +19,12 @@ func Calculate(base int64, script []byte) (int64, int) {
 	)
 	if scparser.IsSignatureContract(script) {
 		size += 67 + io.GetVarSize(script)
-		netFee += Opcode(base, opcode.PUSHDATA1, opcode.PUSHDATA1) + base*ECDSAVerifyPrice
+		netFee += Opcode(base, opcode.PUSHDATA1, opcode.PUSHDATA1)/factor + base*ECDSAVerifyPrice
 	} else if m, pubs, ok := scparser.ParseMultiSigContract(script); ok {
 		n := len(pubs)
 		sizeInv := 66 * m
 		size += io.GetVarSize(sizeInv) + sizeInv + io.GetVarSize(script)
-		netFee += calculateMultisig(base, m) + calculateMultisig(base, n)
+		netFee += (calculateMultisig(base, m) + calculateMultisig(base, n)) / factor
 		netFee += base * ECDSAVerifyPrice * int64(n)
 	} /*else {
 		// We can support more contract types in the future.