From 6f69cdd109b1dd692b8dfb15e7c53d2051fbc946 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Mon, 13 Nov 2017 13:47:27 +0200
Subject: all: switch gas limits from big.Int to uint64

---
 core/vm/evm.go          | 2 +-
 core/vm/gas_table.go    | 6 ++----
 core/vm/instructions.go | 2 +-
 core/vm/interface.go    | 4 ++--
 core/vm/noop.go         | 4 ++--
 core/vm/runtime/env.go  | 4 +---
 6 files changed, 9 insertions(+), 13 deletions(-)

(limited to 'core/vm')

diff --git a/core/vm/evm.go b/core/vm/evm.go
index a3f3a97cb..8796a633e 100644
--- a/core/vm/evm.go
+++ b/core/vm/evm.go
@@ -69,7 +69,7 @@ type Context struct {
 
 	// Block information
 	Coinbase    common.Address // Provides information for COINBASE
-	GasLimit    *big.Int       // Provides information for GASLIMIT
+	GasLimit    uint64         // Provides information for GASLIMIT
 	BlockNumber *big.Int       // Provides information for NUMBER
 	Time        *big.Int       // Provides information for TIME
 	Difficulty  *big.Int       // Provides information for DIFFICULTY
diff --git a/core/vm/gas_table.go b/core/vm/gas_table.go
index ff109af57..83adba428 100644
--- a/core/vm/gas_table.go
+++ b/core/vm/gas_table.go
@@ -17,8 +17,6 @@
 package vm
 
 import (
-	"math/big"
-
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/math"
 	"github.com/ethereum/go-ethereum/params"
@@ -130,7 +128,7 @@ func gasSStore(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, m
 		// 0 => non 0
 		return params.SstoreSetGas, nil
 	} else if !common.EmptyHash(val) && common.EmptyHash(common.BigToHash(y)) {
-		evm.StateDB.AddRefund(new(big.Int).SetUint64(params.SstoreRefundGas))
+		evm.StateDB.AddRefund(params.SstoreRefundGas)
 
 		return params.SstoreClearGas, nil
 	} else {
@@ -405,7 +403,7 @@ func gasSuicide(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack,
 	}
 
 	if !evm.StateDB.HasSuicided(contract.Address()) {
-		evm.StateDB.AddRefund(new(big.Int).SetUint64(params.SuicideRefundGas))
+		evm.StateDB.AddRefund(params.SuicideRefundGas)
 	}
 	return gas, nil
 }
diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index 1d1585fca..766172501 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -472,7 +472,7 @@ func opDifficulty(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stac
 }
 
 func opGasLimit(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
-	stack.push(math.U256(new(big.Int).Set(evm.GasLimit)))
+	stack.push(math.U256(new(big.Int).SetUint64(evm.GasLimit)))
 	return nil, nil
 }
 
diff --git a/core/vm/interface.go b/core/vm/interface.go
index c0c52732b..1ef91cf1d 100644
--- a/core/vm/interface.go
+++ b/core/vm/interface.go
@@ -39,8 +39,8 @@ type StateDB interface {
 	SetCode(common.Address, []byte)
 	GetCodeSize(common.Address) int
 
-	AddRefund(*big.Int)
-	GetRefund() *big.Int
+	AddRefund(uint64)
+	GetRefund() uint64
 
 	GetState(common.Address, common.Hash) common.Hash
 	SetState(common.Address, common.Hash, common.Hash)
diff --git a/core/vm/noop.go b/core/vm/noop.go
index 2a04a9565..b71ead0d7 100644
--- a/core/vm/noop.go
+++ b/core/vm/noop.go
@@ -55,8 +55,8 @@ func (NoopStateDB) GetCodeHash(common.Address) common.Hash
 func (NoopStateDB) GetCode(common.Address) []byte                                      { return nil }
 func (NoopStateDB) SetCode(common.Address, []byte)                                     {}
 func (NoopStateDB) GetCodeSize(common.Address) int                                     { return 0 }
-func (NoopStateDB) AddRefund(*big.Int)                                                 {}
-func (NoopStateDB) GetRefund() *big.Int                                                { return nil }
+func (NoopStateDB) AddRefund(uint64)                                                   {}
+func (NoopStateDB) GetRefund() uint64                                                  { return 0 }
 func (NoopStateDB) GetState(common.Address, common.Hash) common.Hash                   { return common.Hash{} }
 func (NoopStateDB) SetState(common.Address, common.Hash, common.Hash)                  {}
 func (NoopStateDB) Suicide(common.Address) bool                                        { return false }
diff --git a/core/vm/runtime/env.go b/core/vm/runtime/env.go
index 818da1be2..31c9b9cf9 100644
--- a/core/vm/runtime/env.go
+++ b/core/vm/runtime/env.go
@@ -17,8 +17,6 @@
 package runtime
 
 import (
-	"math/big"
-
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/vm"
@@ -35,7 +33,7 @@ func NewEnv(cfg *Config) *vm.EVM {
 		BlockNumber: cfg.BlockNumber,
 		Time:        cfg.Time,
 		Difficulty:  cfg.Difficulty,
-		GasLimit:    new(big.Int).SetUint64(cfg.GasLimit),
+		GasLimit:    cfg.GasLimit,
 		GasPrice:    cfg.GasPrice,
 	}
 
-- 
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