plugeth/params/network_params.go
gary rong 6eef141aef
les: historical data garbage collection (#19570)
This change introduces garbage collection for the light client. Historical
chain data is deleted periodically. If you want to disable the GC, use
the --light.nopruning flag.
2020-07-13 11:02:54 +02:00

68 lines
2.8 KiB
Go

// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package params
// These are network parameters that need to be constant between clients, but
// aren't necessarily consensus related.
const (
// BloomBitsBlocks is the number of blocks a single bloom bit section vector
// contains on the server side.
BloomBitsBlocks uint64 = 4096
// BloomBitsBlocksClient is the number of blocks a single bloom bit section vector
// contains on the light client side
BloomBitsBlocksClient uint64 = 32768
// BloomConfirms is the number of confirmation blocks before a bloom section is
// considered probably final and its rotated bits are calculated.
BloomConfirms = 256
// CHTFrequency is the block frequency for creating CHTs
CHTFrequency = 32768
// BloomTrieFrequency is the block frequency for creating BloomTrie on both
// server/client sides.
BloomTrieFrequency = 32768
// HelperTrieConfirmations is the number of confirmations before a client is expected
// to have the given HelperTrie available.
HelperTrieConfirmations = 2048
// HelperTrieProcessConfirmations is the number of confirmations before a HelperTrie
// is generated
HelperTrieProcessConfirmations = 256
// CheckpointFrequency is the block frequency for creating checkpoint
CheckpointFrequency = 32768
// CheckpointProcessConfirmations is the number before a checkpoint is generated
CheckpointProcessConfirmations = 256
// FullImmutabilityThreshold is the number of blocks after which a chain segment is
// considered immutable (i.e. soft finality). It is used by the downloader as a
// hard limit against deep ancestors, by the blockchain against deep reorgs, by
// the freezer as the cutoff threshold and by clique as the snapshot trust limit.
FullImmutabilityThreshold = 90000
// LightImmutabilityThreshold is the number of blocks after which a header chain
// segment is considered immutable for light client(i.e. soft finality). It is used by
// the downloader as a hard limit against deep ancestors, by the blockchain against deep
// reorgs, by the light pruner as the pruning validity guarantee.
LightImmutabilityThreshold = 30000
)