mirror of https://github.com/ethereum/go-ethereum
Felix Lange
8 years ago
parent
2c6be49d20
commit
6b727c0440
@ -0,0 +1,64 @@ |
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// Copyright 2014 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// go-ethereum 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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// Package utils contains internal helper functions for go-ethereum commands.
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package utils |
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import ( |
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"fmt" |
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"runtime" |
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"github.com/ethereum/go-ethereum/logger" |
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"github.com/ethereum/go-ethereum/logger/glog" |
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"github.com/ethereum/go-ethereum/params" |
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"github.com/ethereum/go-ethereum/rlp" |
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) |
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const ( |
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VersionMajor = 1 // Major version component of the current release
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VersionMinor = 5 // Minor version component of the current release
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VersionPatch = 0 // Patch version component of the current release
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VersionMeta = "unstable" // Version metadata to append to the version string
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) |
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// Version holds the textual version string.
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var Version = func() string { |
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v := fmt.Sprintf("%d.%d.%d", VersionMajor, VersionMinor, VersionPatch) |
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if VersionMeta != "" { |
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v += "-" + VersionMeta |
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} |
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return v |
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}() |
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// MakeDefaultExtraData returns the default Ethereum block extra data blob.
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func MakeDefaultExtraData(clientIdentifier string) []byte { |
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var clientInfo = struct { |
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Version uint |
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Name string |
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GoVersion string |
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Os string |
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}{uint(VersionMajor<<16 | VersionMinor<<8 | VersionPatch), clientIdentifier, runtime.Version(), runtime.GOOS} |
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extra, err := rlp.EncodeToBytes(clientInfo) |
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if err != nil { |
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glog.V(logger.Warn).Infoln("error setting canonical miner information:", err) |
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} |
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if uint64(len(extra)) > params.MaximumExtraDataSize.Uint64() { |
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glog.V(logger.Warn).Infoln("error setting canonical miner information: extra exceeds", params.MaximumExtraDataSize) |
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glog.V(logger.Debug).Infof("extra: %x\n", extra) |
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return nil |
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} |
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return extra |
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} |
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