82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
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// Copyright 2015 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 downloader
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import "fmt"
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// SyncMode represents the synchronisation mode of the downloader.
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// It is a uint32 as it is used with atomic operations.
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type SyncMode uint32
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const (
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FullSync SyncMode = iota // Synchronise the entire blockchain history from full blocks
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FastSync // Quickly download the headers, full sync only at the chain
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SnapSync // Download the chain and the state via compact snapshots
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LightSync // Download only the headers and terminate afterwards
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)
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func (mode SyncMode) IsValid() bool {
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return mode >= FullSync && mode <= LightSync
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}
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// String implements the stringer interface.
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func (mode SyncMode) String() string {
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switch mode {
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case FullSync:
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return "full"
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case FastSync:
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return "fast"
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case SnapSync:
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return "snap"
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case LightSync:
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return "light"
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default:
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return "unknown"
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}
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}
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func (mode SyncMode) MarshalText() ([]byte, error) {
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switch mode {
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case FullSync:
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return []byte("full"), nil
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case FastSync:
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return []byte("fast"), nil
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case SnapSync:
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return []byte("snap"), nil
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case LightSync:
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return []byte("light"), nil
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default:
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return nil, fmt.Errorf("unknown sync mode %d", mode)
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}
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}
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func (mode *SyncMode) UnmarshalText(text []byte) error {
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switch string(text) {
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case "full":
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*mode = FullSync
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case "fast":
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*mode = FastSync
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case "snap":
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*mode = SnapSync
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case "light":
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*mode = LightSync
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default:
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return fmt.Errorf(`unknown sync mode %q, want "full", "fast" or "light"`, text)
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}
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return nil
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}
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