github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/core/vm/eips.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package vm
    19  
    20  import (
    21  	"fmt"
    22  
    23  	"github.com/AigarNetwork/aigar/params"
    24  )
    25  
    26  // EnableEIP enables the given EIP on the config.
    27  // This operation writes in-place, and callers need to ensure that the globally
    28  // defined jump tables are not polluted.
    29  func EnableEIP(eipNum int, jt *JumpTable) error {
    30  	switch eipNum {
    31  	case 2200:
    32  		enable2200(jt)
    33  	case 1884:
    34  		enable1884(jt)
    35  	case 1344:
    36  		enable1344(jt)
    37  	default:
    38  		return fmt.Errorf("undefined eip %d", eipNum)
    39  	}
    40  	return nil
    41  }
    42  
    43  // enable1884 applies EIP-1884 to the given jump table:
    44  // - Increase cost of BALANCE to 700
    45  // - Increase cost of EXTCODEHASH to 700
    46  // - Increase cost of SLOAD to 800
    47  // - Define SELFBALANCE, with cost GasFastStep (5)
    48  func enable1884(jt *JumpTable) {
    49  	// Gas cost changes
    50  	jt[BALANCE].constantGas = params.BalanceGasEIP1884
    51  	jt[EXTCODEHASH].constantGas = params.ExtcodeHashGasEIP1884
    52  	jt[SLOAD].constantGas = params.SloadGasEIP1884
    53  
    54  	// New opcode
    55  	jt[SELFBALANCE] = operation{
    56  		execute:     opSelfBalance,
    57  		constantGas: GasFastStep,
    58  		minStack:    minStack(0, 1),
    59  		maxStack:    maxStack(0, 1),
    60  		valid:       true,
    61  	}
    62  }
    63  
    64  func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
    65  	balance := interpreter.intPool.get().Set(interpreter.evm.StateDB.GetBalance(contract.Address()))
    66  	stack.push(balance)
    67  	return nil, nil
    68  }
    69  
    70  // enable1344 applies EIP-1344 (ChainID Opcode)
    71  // - Adds an opcode that returns the current chain’s EIP-155 unique identifier
    72  func enable1344(jt *JumpTable) {
    73  	// New opcode
    74  	jt[CHAINID] = operation{
    75  		execute:     opChainID,
    76  		constantGas: GasQuickStep,
    77  		minStack:    minStack(0, 1),
    78  		maxStack:    maxStack(0, 1),
    79  		valid:       true,
    80  	}
    81  }
    82  
    83  // opChainID implements CHAINID opcode
    84  func opChainID(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
    85  	chainId := interpreter.intPool.get().Set(interpreter.evm.chainConfig.ChainID)
    86  	stack.push(chainId)
    87  	return nil, nil
    88  }
    89  
    90  // enable2200 applies EIP-2200 (Rebalance net-metered SSTORE)
    91  func enable2200(jt *JumpTable) {
    92  	jt[SSTORE].dynamicGas = gasSStoreEIP2200
    93  }