github.com/YoungNK/go-ethereum@v1.9.7/params/network_params.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 params
    18  
    19  // These are network parameters that need to be constant between clients, but
    20  // aren't necessarily consensus related.
    21  
    22  const (
    23  	// BloomBitsBlocks is the number of blocks a single bloom bit section vector
    24  	// contains on the server side.
    25  	BloomBitsBlocks uint64 = 4096
    26  
    27  	// BloomBitsBlocksClient is the number of blocks a single bloom bit section vector
    28  	// contains on the light client side
    29  	BloomBitsBlocksClient uint64 = 32768
    30  
    31  	// BloomConfirms is the number of confirmation blocks before a bloom section is
    32  	// considered probably final and its rotated bits are calculated.
    33  	BloomConfirms = 256
    34  
    35  	// CHTFrequency is the block frequency for creating CHTs
    36  	CHTFrequency = 32768
    37  
    38  	// BloomTrieFrequency is the block frequency for creating BloomTrie on both
    39  	// server/client sides.
    40  	BloomTrieFrequency = 32768
    41  
    42  	// HelperTrieConfirmations is the number of confirmations before a client is expected
    43  	// to have the given HelperTrie available.
    44  	HelperTrieConfirmations = 2048
    45  
    46  	// HelperTrieProcessConfirmations is the number of confirmations before a HelperTrie
    47  	// is generated
    48  	HelperTrieProcessConfirmations = 256
    49  
    50  	// CheckpointFrequency is the block frequency for creating checkpoint
    51  	CheckpointFrequency = 32768
    52  
    53  	// CheckpointProcessConfirmations is the number before a checkpoint is generated
    54  	CheckpointProcessConfirmations = 256
    55  
    56  	// ImmutabilityThreshold is the number of blocks after which a chain segment is
    57  	// considered immutable (i.e. soft finality). It is used by the downloader as a
    58  	// hard limit against deep ancestors, by the blockchain against deep reorgs, by
    59  	// the freezer as the cutoff treshold and by clique as the snapshot trust limit.
    60  	ImmutabilityThreshold = 90000
    61  )