github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/consensus/misc/forks.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 misc
    19  
    20  import (
    21  	"fmt"
    22  
    23  	"github.com/AigarNetwork/aigar/common"
    24  	"github.com/AigarNetwork/aigar/core/types"
    25  	"github.com/AigarNetwork/aigar/params"
    26  )
    27  
    28  // VerifyForkHashes verifies that blocks conforming to network hard-forks do have
    29  // the correct hashes, to avoid clients going off on different chains. This is an
    30  // optional feature.
    31  func VerifyForkHashes(config *params.ChainConfig, header *types.Header, uncle bool) error {
    32  	// We don't care about uncles
    33  	if uncle {
    34  		return nil
    35  	}
    36  	// If the homestead reprice hash is set, validate it
    37  	if config.EIP150Block != nil && config.EIP150Block.Cmp(header.Number) == 0 {
    38  		if config.EIP150Hash != (common.Hash{}) && config.EIP150Hash != header.Hash() {
    39  			return fmt.Errorf("homestead gas reprice fork: have 0x%x, want 0x%x", header.Hash(), config.EIP150Hash)
    40  		}
    41  	}
    42  	// All ok, return
    43  	return nil
    44  }