github.com/devfans/go-ethereum@v1.5.10-0.20170326212234-7419d0c38291/eth/downloader/modes.go (about)

     1  // Copyright 2015 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 downloader
    18  
    19  // SyncMode represents the synchronisation mode of the downloader.
    20  type SyncMode int
    21  
    22  const (
    23  	FullSync  SyncMode = iota // Synchronise the entire blockchain history from full blocks
    24  	FastSync                  // Quickly download the headers, full sync only at the chain head
    25  	LightSync                 // Download only the headers and terminate afterwards
    26  )
    27  
    28  // String implements the stringer interface.
    29  func (mode SyncMode) String() string {
    30  	switch mode {
    31  	case FullSync:
    32  		return "full"
    33  	case FastSync:
    34  		return "fast"
    35  	case LightSync:
    36  		return "light"
    37  	default:
    38  		return "unknown"
    39  	}
    40  }