github.com/MetalBlockchain/subnet-evm@v0.6.3/params/network_params.go (about)

     1  // (c) 2019-2020, Ava Labs, Inc.
     2  //
     3  // This file is a derived work, based on the go-ethereum library whose original
     4  // notices appear below.
     5  //
     6  // It is distributed under a license compatible with the licensing terms of the
     7  // original code from which it is derived.
     8  //
     9  // Much love to the original authors for their work.
    10  // **********
    11  // Copyright 2017 The go-ethereum Authors
    12  // This file is part of the go-ethereum library.
    13  //
    14  // The go-ethereum library is free software: you can redistribute it and/or modify
    15  // it under the terms of the GNU Lesser General Public License as published by
    16  // the Free Software Foundation, either version 3 of the License, or
    17  // (at your option) any later version.
    18  //
    19  // The go-ethereum library is distributed in the hope that it will be useful,
    20  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    22  // GNU Lesser General Public License for more details.
    23  //
    24  // You should have received a copy of the GNU Lesser General Public License
    25  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    26  
    27  package params
    28  
    29  // These are network parameters that need to be constant between clients, but
    30  // aren't necessarily consensus related.
    31  
    32  const (
    33  	// BloomBitsBlocks is the number of blocks a single bloom bit section vector
    34  	// contains on the server side.
    35  	BloomBitsBlocks uint64 = 4096
    36  
    37  	// BloomBitsBlocksClient is the number of blocks a single bloom bit section vector
    38  	// contains on the light client side
    39  	BloomBitsBlocksClient uint64 = 32768
    40  
    41  	// BloomConfirms is the number of confirmation blocks before a bloom section is
    42  	// considered probably final and its rotated bits are calculated.
    43  	BloomConfirms = 256
    44  
    45  	// CHTFrequency is the block frequency for creating CHTs
    46  	CHTFrequency = 32768
    47  
    48  	// BloomTrieFrequency is the block frequency for creating BloomTrie on both
    49  	// server/client sides.
    50  	BloomTrieFrequency = 32768
    51  
    52  	// HelperTrieConfirmations is the number of confirmations before a client is expected
    53  	// to have the given HelperTrie available.
    54  	HelperTrieConfirmations = 2048
    55  
    56  	// HelperTrieProcessConfirmations is the number of confirmations before a HelperTrie
    57  	// is generated
    58  	HelperTrieProcessConfirmations = 256
    59  
    60  	// CheckpointFrequency is the block frequency for creating checkpoint
    61  	CheckpointFrequency = 32768
    62  
    63  	// CheckpointProcessConfirmations is the number before a checkpoint is generated
    64  	CheckpointProcessConfirmations = 256
    65  
    66  	// FullImmutabilityThreshold is the number of blocks after which a chain segment is
    67  	// considered immutable (i.e. soft finality). It is used by the downloader as a
    68  	// hard limit against deep ancestors, by the blockchain against deep reorgs, by
    69  	// the freezer as the cutoff threshold and by clique as the snapshot trust limit.
    70  	FullImmutabilityThreshold = 90000
    71  
    72  	// LightImmutabilityThreshold is the number of blocks after which a header chain
    73  	// segment is considered immutable for light client(i.e. soft finality). It is used by
    74  	// the downloader as a hard limit against deep ancestors, by the blockchain against deep
    75  	// reorgs, by the light pruner as the pruning validity guarantee.
    76  	LightImmutabilityThreshold = 30000
    77  )