Use compile-time constants instead of runtime-constructed multiprecision objects in FeeStructure.

libevm/FeeStructure.cpp

@@ -16,22 +16,8 @@
 */
 /** @file FeeStructure.cpp
  * @author Gav Wood <i@gavwood.com>
+ * @author Pawel Bylica <chfast@gmail.com>
  * @date 2014
  */
 
 #include "FeeStructure.h"
-
-using namespace std;
-using namespace dev;
-using namespace dev::eth;
-
-u256 const dev::eth::c_stepGas = 1;
-u256 const dev::eth::c_balanceGas = 20;
-u256 const dev::eth::c_sha3Gas = 20;
-u256 const dev::eth::c_sloadGas = 20;
-u256 const dev::eth::c_sstoreGas = 100;
-u256 const dev::eth::c_createGas = 100;
-u256 const dev::eth::c_callGas = 20;
-u256 const dev::eth::c_memoryGas = 1;
-u256 const dev::eth::c_txDataGas = 5;
-u256 const dev::eth::c_txGas = 500;

libevm/FeeStructure.h

@@ -16,28 +16,34 @@
 */
 /** @file FeeStructure.h
  * @author Gav Wood <i@gavwood.com>
+ * @author Pawel Bylica <chfast@gmail.com>
  * @date 2014
  */
 
 #pragma once
 
-#include <libdevcore/Common.h>
-
 namespace dev
 {
 namespace eth
 {
 
-extern u256 const c_stepGas;			///< Once per operation, except for SSTORE, SLOAD, BALANCE, SHA3, CREATE, CALL.
-extern u256 const c_balanceGas;			///< Once per BALANCE operation.
-extern u256 const c_sha3Gas;			///< Once per SHA3 operation.
-extern u256 const c_sloadGas;			///< Once per SLOAD operation.
-extern u256 const c_sstoreGas;			///< Once per non-zero storage element in a CREATE call/transaction. Also, once/twice per SSTORE operation depending on whether the zeroness changes (twice iff it changes from zero; nothing at all if to zero) or doesn't (once).
-extern u256 const c_createGas;			///< Once per CREATE operation & contract-creation transaction.
-extern u256 const c_callGas;			///< Once per CALL operation & message call transaction.
-extern u256 const c_memoryGas;			///< Times the address of the (highest referenced byte in memory + 1). NOTE: referencing happens on read, write and in instructions such as RETURN and CALL.
-extern u256 const c_txDataGas;			///< Per byte of data attached to a transaction. NOTE: Not payable on data of calls between transactions.
-extern u256 const c_txGas;				///< Per transaction. NOTE: Not payable on data of calls between transactions.
+enum class Instruction: uint8_t;
+
+struct FeeStructure
+{
+	static uint32_t getInstructionFee(Instruction _inst);
+};
+
+static uint32_t const c_stepGas		= 1;	///< Once per operation, except for SSTORE, SLOAD, BALANCE, SHA3, CREATE, CALL.
+static uint32_t const c_balanceGas	= 20;	///< Once per BALANCE operation.
+static uint32_t const c_sha3Gas		= 20;	///< Once per SHA3 operation.
+static uint32_t const c_sloadGas	= 20;	///< Once per SLOAD operation.
+static uint32_t const c_sstoreGas	= 100;	///< Once per non-zero storage element in a CREATE call/transaction. Also, once/twice per SSTORE operation depending on whether the zeroness changes (twice iff it changes from zero; nothing at all if to zero) or doesn't (once).
+static uint32_t const c_createGas	= 100;	///< Once per CREATE operation & contract-creation transaction.
+static uint32_t const c_callGas		= 20;	///< Once per CALL operation & message call transaction.
+static uint32_t const c_memoryGas	= 1;	///< Times the address of the (highest referenced byte in memory + 1). NOTE: referencing happens on read, write and in instructions such as RETURN and CALL.
+static uint32_t const c_txDataGas	= 5;	///< Per byte of data attached to a transaction. NOTE: Not payable on data of calls between transactions.
+static uint32_t const c_txGas		= 500;	///< Per transaction. NOTE: Not payable on data of calls between transactions.
 
 }
 }