github.com/kisexp/xdchain@v0.0.0-20211206025815-490d6b732aa7/consensus/istanbul/validator/validator.go (about)

     1  // Copyright 2017 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 validator
    18  
    19  import (
    20  	"bytes"
    21  
    22  	"github.com/kisexp/xdchain/common"
    23  	"github.com/kisexp/xdchain/consensus/istanbul"
    24  )
    25  
    26  func New(addr common.Address) istanbul.Validator {
    27  	return &defaultValidator{
    28  		address: addr,
    29  	}
    30  }
    31  
    32  func NewSet(addrs []common.Address, policy *istanbul.ProposerPolicy) istanbul.ValidatorSet {
    33  	return newDefaultSet(addrs, policy)
    34  }
    35  
    36  func ExtractValidators(extraData []byte) []common.Address {
    37  	// get the validator addresses
    38  	addrs := make([]common.Address, (len(extraData) / common.AddressLength))
    39  	for i := 0; i < len(addrs); i++ {
    40  		copy(addrs[i][:], extraData[i*common.AddressLength:])
    41  	}
    42  
    43  	return addrs
    44  }
    45  
    46  // Check whether the extraData is presented in prescribed form
    47  func ValidExtraData(extraData []byte) bool {
    48  	return len(extraData)%common.AddressLength == 0
    49  }
    50  
    51  func SortedAddresses(validators []istanbul.Validator) []common.Address {
    52  	addrs := make([]common.Address, len(validators))
    53  	for i, validator := range validators {
    54  		addrs[i] = validator.Address()
    55  	}
    56  
    57  	for i := 0; i < len(addrs); i++ {
    58  		for j := i + 1; j < len(addrs); j++ {
    59  			if bytes.Compare(addrs[i][:], addrs[j][:]) > 0 {
    60  				addrs[i], addrs[j] = addrs[j], addrs[i]
    61  			}
    62  		}
    63  	}
    64  
    65  	return addrs
    66  }