core/vm, params: refactor chain configuration (#19735)

* params, core/vm: deprecating gastable, part 1

* core/vm, params: deprecate gastable, use both constant and dynamic gas

* core/vm, params: remove gastable, remove copypaste

* core/vm: make use of the chainrules

* interpreter: make tracing count constant+dynamic gas

* core/vm: review concerns (param/method name changes)

* core/vm: make use of chainrules more

3 files changed, 42 insertions, 128 deletions

diff --git a/params/config.go b/params/config.go
index 2c7be848a..8c40b797d 100644
--- a/params/config.go
+++ b/params/config.go
@@ -386,25 +386,6 @@ func (c *ChainConfig) IsEWASM(num *big.Int) bool {
 	return isForked(c.EWASMBlock, num)
 }
 
-// GasTable returns the gas table corresponding to the current phase (homestead or homestead reprice).
-//
-// The returned GasTable's fields shouldn't, under any circumstances, be changed.
-func (c *ChainConfig) GasTable(num *big.Int) GasTable {
-	if num == nil {
-		return GasTableHomestead
-	}
-	switch {
-	case c.IsConstantinople(num):
-		return GasTableConstantinople
-	case c.IsEIP158(num):
-		return GasTableEIP158
-	case c.IsEIP150(num):
-		return GasTableEIP150
-	default:
-		return GasTableHomestead
-	}
-}
-
 // CheckCompatible checks whether scheduled fork transitions have been imported
 // with a mismatching chain configuration.
 func (c *ChainConfig) CheckCompatible(newcfg *ChainConfig, height uint64) *ConfigCompatError {
diff --git a/params/gas_table.go b/params/gas_table.go
deleted file mode 100644
index 6c4a38269..000000000
--- a/params/gas_table.go
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package params
-
-// GasTable organizes gas prices for different ethereum phases.
-type GasTable struct {
-	ExtcodeSize uint64
-	ExtcodeCopy uint64
-	ExtcodeHash uint64
-	Balance     uint64
-	SLoad       uint64
-	Calls       uint64
-	Suicide     uint64
-
-	ExpByte uint64
-
-	// CreateBySuicide occurs when the
-	// refunded account is one that does
-	// not exist. This logic is similar
-	// to call. May be left nil. Nil means
-	// not charged.
-	CreateBySuicide uint64
-}
-
-// Variables containing gas prices for different ethereum phases.
-var (
-	// GasTableHomestead contain the gas prices for
-	// the homestead phase.
-	GasTableHomestead = GasTable{
-		ExtcodeSize: 20,
-		ExtcodeCopy: 20,
-		Balance:     20,
-		SLoad:       50,
-		Calls:       40,
-		Suicide:     0,
-		ExpByte:     10,
-	}
-
-	// GasTableEIP150 contain the gas re-prices for
-	// the EIP150 phase.
-	GasTableEIP150 = GasTable{
-		ExtcodeSize: 700,
-		ExtcodeCopy: 700,
-		Balance:     400,
-		SLoad:       200,
-		Calls:       700,
-		Suicide:     5000,
-		ExpByte:     10,
-
-		CreateBySuicide: 25000,
-	}
-	// GasTableEIP158 contain the gas re-prices for
-	// the EIP155/EIP158 phase.
-	GasTableEIP158 = GasTable{
-		ExtcodeSize: 700,
-		ExtcodeCopy: 700,
-		Balance:     400,
-		SLoad:       200,
-		Calls:       700,
-		Suicide:     5000,
-		ExpByte:     50,
-
-		CreateBySuicide: 25000,
-	}
-	// GasTableConstantinople contain the gas re-prices for
-	// the constantinople phase.
-	GasTableConstantinople = GasTable{
-		ExtcodeSize: 700,
-		ExtcodeCopy: 700,
-		ExtcodeHash: 400,
-		Balance:     400,
-		SLoad:       200,
-		Calls:       700,
-		Suicide:     5000,
-		ExpByte:     50,
-
-		CreateBySuicide: 25000,
-	}
-)
diff --git a/params/protocol_params.go b/params/protocol_params.go
index 14750f6a1..01dc197af 100644
--- a/params/protocol_params.go
+++ b/params/protocol_params.go
@@ -52,22 +52,48 @@ const (
 	NetSstoreResetRefund      uint64 = 4800  // Once per SSTORE operation for resetting to the original non-zero value
 	NetSstoreResetClearRefund uint64 = 19800 // Once per SSTORE operation for resetting to the original zero value
 
-	JumpdestGas      uint64 = 1     // Once per JUMPDEST operation.
-	EpochDuration    uint64 = 30000 // Duration between proof-of-work epochs.
-	CallGas          uint64 = 40    // Once per CALL operation & message call transaction.
-	CreateDataGas    uint64 = 200   //
-	CallCreateDepth  uint64 = 1024  // Maximum depth of call/create stack.
-	ExpGas           uint64 = 10    // Once per EXP instruction
-	LogGas           uint64 = 375   // Per LOG* operation.
-	CopyGas          uint64 = 3     //
-	StackLimit       uint64 = 1024  // Maximum size of VM stack allowed.
-	TierStepGas      uint64 = 0     // Once per operation, for a selection of them.
-	LogTopicGas      uint64 = 375   // Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas.
-	CreateGas        uint64 = 32000 // Once per CREATE operation & contract-creation transaction.
-	Create2Gas       uint64 = 32000 // Once per CREATE2 operation
-	SuicideRefundGas uint64 = 24000 // Refunded following a suicide operation.
-	MemoryGas        uint64 = 3     // 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.
-	TxDataNonZeroGas uint64 = 68    // Per byte of data attached to a transaction that is not equal to zero. NOTE: Not payable on data of calls between transactions.
+	JumpdestGas   uint64 = 1     // Once per JUMPDEST operation.
+	EpochDuration uint64 = 30000 // Duration between proof-of-work epochs.
+
+	CreateDataGas         uint64 = 200   //
+	CallCreateDepth       uint64 = 1024  // Maximum depth of call/create stack.
+	ExpGas                uint64 = 10    // Once per EXP instruction
+	LogGas                uint64 = 375   // Per LOG* operation.
+	CopyGas               uint64 = 3     //
+	StackLimit            uint64 = 1024  // Maximum size of VM stack allowed.
+	TierStepGas           uint64 = 0     // Once per operation, for a selection of them.
+	LogTopicGas           uint64 = 375   // Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas.
+	CreateGas             uint64 = 32000 // Once per CREATE operation & contract-creation transaction.
+	Create2Gas            uint64 = 32000 // Once per CREATE2 operation
+	SelfdestructRefundGas uint64 = 24000 // Refunded following a selfdestruct operation.
+	MemoryGas             uint64 = 3     // 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.
+	TxDataNonZeroGas      uint64 = 68    // Per byte of data attached to a transaction that is not equal to zero. NOTE: Not payable on data of calls between transactions.
+
+	// These have been changed during the course of the chain
+	CallGasFrontier        uint64 = 40  // Once per CALL operation & message call transaction.
+	CallGasEIP150          uint64 = 700 // Static portion of gas for CALL-derivates after EIP 150 (Tangerine)
+	BalanceGasFrontier     uint64 = 20  // The cost of a BALANCE operation
+	BalanceGasEIP150       uint64 = 400 // The cost of a BALANCE operation after Tangerine
+	ExtcodeSizeGasFrontier uint64 = 20  // Cost of EXTCODESIZE before EIP 150 (Tangerine)
+	ExtcodeSizeGasEIP150   uint64 = 700 // Cost of EXTCODESIZE after EIP 150 (Tangerine)
+	SloadGasFrontier       uint64 = 50
+	SloadGasEIP150         uint64 = 200
+	ExtcodeHashGas         uint64 = 400  // Cost of EXTCODEHASH (introduced in Constantinople)
+	SelfdestructGasEIP150  uint64 = 5000 // Cost of SELFDESTRUCT post EIP 150 (Tangerine)
+
+	// EXP has a dynamic portion depending on the size of the exponent
+	ExpByteFrontier uint64 = 10 // was set to 10 in Frontier
+	ExpByteEIP158   uint64 = 50 // was raised to 50 during Eip158 (Spurious Dragon)
+
+	// Extcodecopy has a dynamic AND a static cost. This represents only the
+	// static portion of the gas. It was changed during EIP 150 (Tangerine)
+	ExtcodeCopyBaseFrontier uint64 = 20
+	ExtcodeCopyBaseEIP150   uint64 = 700
+
+	// CreateBySelfdestructGas is used when the refunded account is one that does
+	// not exist. This logic is similar to call.
+	// Introduced in Tangerine Whistle (Eip 150)
+	CreateBySelfdestructGas uint64 = 25000
 
 	MaxCodeSize = 24576 // Maximum bytecode to permit for a contract