github.com/ccm-chain/ccmchain@v1.0.0/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  	"sort"
    22  
    23  	"github.com/ccm-chain/ccmchain/params"
    24  	"github.com/holiman/uint256"
    25  )
    26  
    27  var activators = map[int]func(*JumpTable){
    28  	2200: enable2200,
    29  	1884: enable1884,
    30  	1344: enable1344,
    31  	2315: enable2315,
    32  }
    33  
    34  // EnableEIP enables the given EIP on the config.
    35  // This operation writes in-place, and callers need to ensure that the globally
    36  // defined jump tables are not polluted.
    37  func EnableEIP(eipNum int, jt *JumpTable) error {
    38  	enablerFn, ok := activators[eipNum]
    39  	if !ok {
    40  		return fmt.Errorf("undefined eip %d", eipNum)
    41  	}
    42  	enablerFn(jt)
    43  	return nil
    44  }
    45  
    46  func ValidEip(eipNum int) bool {
    47  	_, ok := activators[eipNum]
    48  	return ok
    49  }
    50  func ActivateableEips() []string {
    51  	var nums []string
    52  	for k := range activators {
    53  		nums = append(nums, fmt.Sprintf("%d", k))
    54  	}
    55  	sort.Strings(nums)
    56  	return nums
    57  }
    58  
    59  // enable1884 applies EIP-1884 to the given jump table:
    60  // - Increase cost of BALANCE to 700
    61  // - Increase cost of EXTCODEHASH to 700
    62  // - Increase cost of SLOAD to 800
    63  // - Define SELFBALANCE, with cost GasFastStep (5)
    64  func enable1884(jt *JumpTable) {
    65  	// Gas cost changes
    66  	jt[SLOAD].constantGas = params.SloadGasEIP1884
    67  	jt[BALANCE].constantGas = params.BalanceGasEIP1884
    68  	jt[EXTCODEHASH].constantGas = params.ExtcodeHashGasEIP1884
    69  
    70  	// New opcode
    71  	jt[SELFBALANCE] = &operation{
    72  		execute:     opSelfBalance,
    73  		constantGas: GasFastStep,
    74  		minStack:    minStack(0, 1),
    75  		maxStack:    maxStack(0, 1),
    76  	}
    77  }
    78  
    79  func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) {
    80  	balance, _ := uint256.FromBig(interpreter.evm.StateDB.GetBalance(callContext.contract.Address()))
    81  	callContext.stack.push(balance)
    82  	return nil, nil
    83  }
    84  
    85  // enable1344 applies EIP-1344 (ChainID Opcode)
    86  // - Adds an opcode that returns the current chain’s EIP-155 unique identifier
    87  func enable1344(jt *JumpTable) {
    88  	// New opcode
    89  	jt[CHAINID] = &operation{
    90  		execute:     opChainID,
    91  		constantGas: GasQuickStep,
    92  		minStack:    minStack(0, 1),
    93  		maxStack:    maxStack(0, 1),
    94  	}
    95  }
    96  
    97  // opChainID implements CHAINID opcode
    98  func opChainID(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) {
    99  	chainId, _ := uint256.FromBig(interpreter.evm.chainConfig.ChainID)
   100  	callContext.stack.push(chainId)
   101  	return nil, nil
   102  }
   103  
   104  // enable2200 applies EIP-2200 (Rebalance net-metered SSTORE)
   105  func enable2200(jt *JumpTable) {
   106  	jt[SLOAD].constantGas = params.SloadGasEIP2200
   107  	jt[SSTORE].dynamicGas = gasSStoreEIP2200
   108  }
   109  
   110  // enable2315 applies EIP-2315 (Simple Subroutines)
   111  // - Adds opcodes that jump to and return from subroutines
   112  func enable2315(jt *JumpTable) {
   113  	// New opcode
   114  	jt[BEGINSUB] = &operation{
   115  		execute:     opBeginSub,
   116  		constantGas: GasQuickStep,
   117  		minStack:    minStack(0, 0),
   118  		maxStack:    maxStack(0, 0),
   119  	}
   120  	// New opcode
   121  	jt[JUMPSUB] = &operation{
   122  		execute:     opJumpSub,
   123  		constantGas: GasSlowStep,
   124  		minStack:    minStack(1, 0),
   125  		maxStack:    maxStack(1, 0),
   126  		jumps:       true,
   127  	}
   128  	// New opcode
   129  	jt[RETURNSUB] = &operation{
   130  		execute:     opReturnSub,
   131  		constantGas: GasFastStep,
   132  		minStack:    minStack(0, 0),
   133  		maxStack:    maxStack(0, 0),
   134  		jumps:       true,
   135  	}
   136  }