6eef141aef
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.
68 lines
2.8 KiB
Go
68 lines
2.8 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package params
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// These are network parameters that need to be constant between clients, but
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// aren't necessarily consensus related.
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const (
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// BloomBitsBlocks is the number of blocks a single bloom bit section vector
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// contains on the server side.
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BloomBitsBlocks uint64 = 4096
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// BloomBitsBlocksClient is the number of blocks a single bloom bit section vector
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// contains on the light client side
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BloomBitsBlocksClient uint64 = 32768
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// BloomConfirms is the number of confirmation blocks before a bloom section is
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// considered probably final and its rotated bits are calculated.
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BloomConfirms = 256
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// CHTFrequency is the block frequency for creating CHTs
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CHTFrequency = 32768
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// BloomTrieFrequency is the block frequency for creating BloomTrie on both
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// server/client sides.
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BloomTrieFrequency = 32768
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// HelperTrieConfirmations is the number of confirmations before a client is expected
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// to have the given HelperTrie available.
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HelperTrieConfirmations = 2048
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// HelperTrieProcessConfirmations is the number of confirmations before a HelperTrie
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// is generated
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HelperTrieProcessConfirmations = 256
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// CheckpointFrequency is the block frequency for creating checkpoint
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CheckpointFrequency = 32768
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// CheckpointProcessConfirmations is the number before a checkpoint is generated
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CheckpointProcessConfirmations = 256
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// FullImmutabilityThreshold is the number of blocks after which a chain segment is
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// considered immutable (i.e. soft finality). It is used by the downloader as a
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// hard limit against deep ancestors, by the blockchain against deep reorgs, by
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// the freezer as the cutoff threshold and by clique as the snapshot trust limit.
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FullImmutabilityThreshold = 90000
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// LightImmutabilityThreshold is the number of blocks after which a header chain
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// segment is considered immutable for light client(i.e. soft finality). It is used by
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// the downloader as a hard limit against deep ancestors, by the blockchain against deep
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// reorgs, by the light pruner as the pruning validity guarantee.
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LightImmutabilityThreshold = 30000
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)
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