65 lines
2.3 KiB
Go
65 lines
2.3 KiB
Go
// Copyright 2016 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 = 1 // 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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