121 lines
3.7 KiB
Go
121 lines
3.7 KiB
Go
// Copyright (c) 2015-2016 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package main
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import (
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"github.com/lbryio/lbcd/chaincfg"
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"github.com/lbryio/lbcd/database"
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_ "github.com/lbryio/lbcd/database/ffldb"
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"github.com/lbryio/lbcd/wire"
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btcutil "github.com/lbryio/lbcutil"
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)
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var (
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btcdHomeDir = btcutil.AppDataDir("lbcd", false)
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knownDbTypes = database.SupportedDrivers()
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activeNetParams = &chaincfg.MainNetParams
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// Default global config.
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cfg = &config{
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DataDir: filepath.Join(btcdHomeDir, "data"),
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DbType: "ffldb",
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}
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)
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// config defines the global configuration options.
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type config struct {
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DataDir string `short:"b" long:"datadir" description:"Location of the lbcd data directory"`
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DbType string `long:"dbtype" description:"Database backend to use for the Block Chain"`
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RegressionTest bool `long:"regtest" description:"Use the regression test network"`
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SimNet bool `long:"simnet" description:"Use the simulation test network"`
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TestNet3 bool `long:"testnet" description:"Use the test network"`
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}
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// fileExists reports whether the named file or directory exists.
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func fileExists(name string) bool {
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if _, err := os.Stat(name); err != nil {
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if os.IsNotExist(err) {
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return false
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}
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}
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return true
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}
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// validDbType returns whether or not dbType is a supported database type.
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func validDbType(dbType string) bool {
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for _, knownType := range knownDbTypes {
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if dbType == knownType {
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return true
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}
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}
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return false
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}
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// netName returns the name used when referring to a bitcoin network. At the
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// time of writing, lbcd currently places blocks for testnet version 3 in the
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// data and log directory "testnet", which does not match the Name field of the
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// chaincfg parameters. This function can be used to override this directory name
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// as "testnet" when the passed active network matches wire.TestNet3.
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//
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// A proper upgrade to move the data and log directories for this network to
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// "testnet3" is planned for the future, at which point this function can be
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// removed and the network parameter's name used instead.
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func netName(chainParams *chaincfg.Params) string {
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switch chainParams.Net {
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case wire.TestNet3:
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return "testnet"
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default:
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return chainParams.Name
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}
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}
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// setupGlobalConfig examine the global configuration options for any conditions
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// which are invalid as well as performs any addition setup necessary after the
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// initial parse.
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func setupGlobalConfig() error {
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// Multiple networks can't be selected simultaneously.
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// Count number of network flags passed; assign active network params
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// while we're at it
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numNets := 0
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if cfg.TestNet3 {
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numNets++
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activeNetParams = &chaincfg.TestNet3Params
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}
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if cfg.RegressionTest {
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numNets++
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activeNetParams = &chaincfg.RegressionNetParams
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}
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if cfg.SimNet {
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numNets++
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activeNetParams = &chaincfg.SimNetParams
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}
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if numNets > 1 {
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return errors.New("The testnet, regtest, and simnet params " +
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"can't be used together -- choose one of the three")
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}
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// Validate database type.
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if !validDbType(cfg.DbType) {
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str := "The specified database type [%v] is invalid -- " +
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"supported types %v"
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return fmt.Errorf(str, cfg.DbType, knownDbTypes)
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}
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// Append the network type to the data directory so it is "namespaced"
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// per network. In addition to the block database, there are other
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// pieces of data that are saved to disk such as address manager state.
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// All data is specific to a network, so namespacing the data directory
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// means each individual piece of serialized data does not have to
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// worry about changing names per network and such.
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cfg.DataDir = filepath.Join(cfg.DataDir, netName(activeNetParams))
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return nil
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}
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