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// Copyright 2016 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
// Package utils contains internal helper functions for go-ethereum commands.
package utils
import (
"fmt"
"runtime"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
)
const (
VersionMajor = 1 // Major version component of the current release
VersionMinor = 5 // Minor version component of the current release
VersionPatch = 4 // Patch version component of the current release
VersionMeta = "unstable" // Version metadata to append to the version string
)
// Version holds the textual version string.
var Version = func() string {
v := fmt.Sprintf("%d.%d.%d", VersionMajor, VersionMinor, VersionPatch)
if VersionMeta != "" {
v += "-" + VersionMeta
}
return v
}()
// MakeDefaultExtraData returns the default Ethereum block extra data blob.
func MakeDefaultExtraData(clientIdentifier string) []byte {
var clientInfo = struct {
Version uint
Name string
GoVersion string
Os string
}{uint(VersionMajor<<16 | VersionMinor<<8 | VersionPatch), clientIdentifier, runtime.Version(), runtime.GOOS}
extra, err := rlp.EncodeToBytes(clientInfo)
if err != nil {
glog.V(logger.Warn).Infoln("error setting canonical miner information:", err)
}
if uint64(len(extra)) > params.MaximumExtraDataSize.Uint64() {
glog.V(logger.Warn).Infoln("error setting canonical miner information: extra exceeds", params.MaximumExtraDataSize)
glog.V(logger.Debug).Infof("extra: %x\n", extra)
return nil
}
return extra
}
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