github.com/AlohaMobile/go-ethereum@v1.9.7/core/vm/eips.go (about)

     1  // Copyright 2019 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package vm
    18  
    19  import (
    20  	"fmt"
    21  
    22  	"github.com/ethereum/go-ethereum/params"
    23  )
    24  
    25  // EnableEIP enables the given EIP on the config.
    26  // This operation writes in-place, and callers need to ensure that the globally
    27  // defined jump tables are not polluted.
    28  func EnableEIP(eipNum int, jt *JumpTable) error {
    29  	switch eipNum {
    30  	case 2200:
    31  		enable2200(jt)
    32  	case 1884:
    33  		enable1884(jt)
    34  	case 1344:
    35  		enable1344(jt)
    36  	default:
    37  		return fmt.Errorf("undefined eip %d", eipNum)
    38  	}
    39  	return nil
    40  }
    41  
    42  // enable1884 applies EIP-1884 to the given jump table:
    43  // - Increase cost of BALANCE to 700
    44  // - Increase cost of EXTCODEHASH to 700
    45  // - Increase cost of SLOAD to 800
    46  // - Define SELFBALANCE, with cost GasFastStep (5)
    47  func enable1884(jt *JumpTable) {
    48  	// Gas cost changes
    49  	jt[BALANCE].constantGas = params.BalanceGasEIP1884
    50  	jt[EXTCODEHASH].constantGas = params.ExtcodeHashGasEIP1884
    51  	jt[SLOAD].constantGas = params.SloadGasEIP1884
    52  
    53  	// New opcode
    54  	jt[SELFBALANCE] = operation{
    55  		execute:     opSelfBalance,
    56  		constantGas: GasFastStep,
    57  		minStack:    minStack(0, 1),
    58  		maxStack:    maxStack(0, 1),
    59  		valid:       true,
    60  	}
    61  }
    62  
    63  func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
    64  	balance := interpreter.intPool.get().Set(interpreter.evm.StateDB.GetBalance(contract.Address()))
    65  	stack.push(balance)
    66  	return nil, nil
    67  }
    68  
    69  // enable1344 applies EIP-1344 (ChainID Opcode)
    70  // - Adds an opcode that returns the current chain’s EIP-155 unique identifier
    71  func enable1344(jt *JumpTable) {
    72  	// New opcode
    73  	jt[CHAINID] = operation{
    74  		execute:     opChainID,
    75  		constantGas: GasQuickStep,
    76  		minStack:    minStack(0, 1),
    77  		maxStack:    maxStack(0, 1),
    78  		valid:       true,
    79  	}
    80  }
    81  
    82  // opChainID implements CHAINID opcode
    83  func opChainID(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
    84  	chainId := interpreter.intPool.get().Set(interpreter.evm.chainConfig.ChainID)
    85  	stack.push(chainId)
    86  	return nil, nil
    87  }
    88  
    89  // enable2200 applies EIP-2200 (Rebalance net-metered SSTORE)
    90  func enable2200(jt *JumpTable) {
    91  	jt[SSTORE].dynamicGas = gasSStoreEIP2200
    92  }