diff --git a/.gitignore b/.gitignore index 66fd13c9..fc9c43b0 100644 --- a/.gitignore +++ b/.gitignore @@ -13,3 +13,6 @@ # Dependency directories (remove the comment below to include it) # vendor/ + +.vscode/ +main \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100644 index 00000000..ff400f8e --- /dev/null +++ b/LICENSE @@ -0,0 +1,17 @@ +ISC License + +Copyright (c) 2022-2022 The Babylon developers +Copyright (c) 2013-2017 The btcsuite developers +Copyright (c) 2015-2016 The Decred developers + +Permission to use, copy, modify, and distribute this software for any +purpose with or without fee is hereby granted, provided that the above +copyright notice and this permission notice appear in all copies. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. diff --git a/btcclient/README.md b/btcclient/README.md new file mode 100644 index 00000000..ab779f0b --- /dev/null +++ b/btcclient/README.md @@ -0,0 +1,3 @@ +# btcclient + +This package implements a Bitcoin client. The code is adapted from https://github.com/btcsuite/btcwallet/tree/master/chain. \ No newline at end of file diff --git a/btcclient/client.go b/btcclient/client.go new file mode 100644 index 00000000..5322d17f --- /dev/null +++ b/btcclient/client.go @@ -0,0 +1,58 @@ +// Copyright (c) 2022-2022 The Babylon developers +// Copyright (c) 2013-2016 The btcsuite developers +// Use of this source code is governed by an ISC +// license that can be found in the LICENSE file. + +package btcclient + +import ( + "errors" + + "github.com/babylonchain/vigilante/config" + "github.com/babylonchain/vigilante/netparams" + "github.com/btcsuite/btcd/chaincfg" + "github.com/btcsuite/btcwallet/chain" +) + +var _ chain.Interface = &Client{} + +// Client represents a persistent client connection to a bitcoin RPC server +// for information regarding the current best block chain. +type Client struct { + *chain.RPCClient + Params *chaincfg.Params + Cfg *config.BTCConfig +} + +// New creates a client connection to the server described by the +// connect string. If disableTLS is false, the remote RPC certificate must be +// provided in the certs slice. The connection is not established immediately, +// but must be done using the Start method. If the remote server does not +// operate on the same bitcoin network as described by the passed chain +// parameters, the connection will be disconnected. +func New(cfg *config.BTCConfig) (*Client, error) { + if cfg.ReconnectAttempts < 0 { + return nil, errors.New("reconnectAttempts must be positive") + } + + certs := readCAFile(cfg) + params := netparams.GetBTCParams(cfg.NetParams) + + rpcClient, err := chain.NewRPCClient(params, cfg.Endpoint, cfg.Username, cfg.Password, certs, cfg.DisableClientTLS, cfg.ReconnectAttempts) + if err != nil { + return nil, err + } + client := &Client{rpcClient, params, cfg} + return client, err +} + +func (c *Client) ConnectLoop() { + go func() { + log.Infof("Start connecting to the BTC node %v", c.Cfg.Endpoint) + if err := c.Start(); err != nil { + log.Errorf("Unable to connect to the BTC node: %v", err) + } + log.Info("Successfully connected to the BTC node") + c.WaitForShutdown() + }() +} diff --git a/btcclient/log.go b/btcclient/log.go new file mode 100644 index 00000000..c9bba19e --- /dev/null +++ b/btcclient/log.go @@ -0,0 +1,7 @@ +package btcclient + +import ( + vlog "github.com/babylonchain/vigilante/log" +) + +var log = vlog.Logger.WithField("module", "btcclient") diff --git a/btcclient/tls.go b/btcclient/tls.go new file mode 100644 index 00000000..176fc503 --- /dev/null +++ b/btcclient/tls.go @@ -0,0 +1,26 @@ +package btcclient + +import ( + "io/ioutil" + + "github.com/babylonchain/vigilante/config" +) + +func readCAFile(cfg *config.BTCConfig) []byte { + // Read certificate file if TLS is not disabled. + var certs []byte + if !cfg.DisableClientTLS { + var err error + certs, err = ioutil.ReadFile(cfg.CAFile) + if err != nil { + log.Errorf("Cannot open CA file: %v", err) + // If there's an error reading the CA file, continue + // with nil certs and without the client connection. + certs = nil + } + } else { + log.Infof("Chain server RPC TLS is disabled") + } + + return certs +} diff --git a/cmd/main.go b/cmd/main.go new file mode 100644 index 00000000..8cfc5d74 --- /dev/null +++ b/cmd/main.go @@ -0,0 +1,30 @@ +package main + +import ( + "fmt" + "os" + + "github.com/spf13/cobra" + + "github.com/babylonchain/vigilante/cmd/reporter" + "github.com/babylonchain/vigilante/cmd/submitter" +) + +// TODO: init log + +func main() { + rootCmd := &cobra.Command{ + Use: "vigilante", + Short: "Babylon vigilante", + } + rootCmd.AddCommand(reporter.GetCmd(), submitter.GetCmd()) + + if err := rootCmd.Execute(); err != nil { + switch e := err.(type) { + // TODO: dedicated error codes for vigilantes + default: + fmt.Print(e.Error()) + os.Exit(1) + } + } +} diff --git a/cmd/reporter/reporter.go b/cmd/reporter/reporter.go new file mode 100644 index 00000000..c87a6778 --- /dev/null +++ b/cmd/reporter/reporter.go @@ -0,0 +1,94 @@ +package reporter + +import ( + "github.com/babylonchain/vigilante/btcclient" + "github.com/babylonchain/vigilante/cmd/utils" + "github.com/babylonchain/vigilante/config" + vlog "github.com/babylonchain/vigilante/log" + "github.com/babylonchain/vigilante/metrics" + "github.com/babylonchain/vigilante/rpcserver" + "github.com/babylonchain/vigilante/vigilante" + "github.com/spf13/cobra" +) + +var ( + cfgFile = "" + log = vlog.Logger.WithField("module", "cmd") +) + +// GetCmd returns the cli query commands for this module +func GetCmd() *cobra.Command { + // Group epoching queries under a subcommand + cmd := &cobra.Command{ + Use: "reporter", + Short: "Vigilant reporter", + Run: cmdFunc, + } + addFlags(cmd) + return cmd +} + +func addFlags(cmd *cobra.Command) { + cmd.Flags().StringVar(&cfgFile, "config", "", "config file") +} + +func cmdFunc(cmd *cobra.Command, args []string) { + // get the config from the given file, the default file, or generate a default config + var err error + var cfg config.Config + if len(cfgFile) != 0 { + cfg, err = config.NewFromFile(cfgFile) + } else { + cfg, err = config.New() + } + if err != nil { + panic(err) + } + + // create BTC client + btcClient, err := btcclient.New(&cfg.BTC) + if err != nil { + panic(err) + } + // create reporter + reporter, err := vigilante.NewReporter(&cfg.Reporter, btcClient) + if err != nil { + panic(err) + } + // crete RPC server + server, err := rpcserver.New(&cfg.GRPC, nil, reporter) + if err != nil { + panic(err) + } + + // keep trying BTC client + btcClient.ConnectLoop() + // start reporter and sync + reporter.Start() + reporter.SynchronizeRPC(btcClient) + // start RPC server + server.Start() + // start Prometheus metrics server + metrics.Start() + + // SIGINT handling stuff + utils.AddInterruptHandler(func() { + // TODO: Does this need to wait for the grpc server to finish up any requests? + log.Info("Stopping RPC server...") + server.Stop() + log.Info("RPC server shutdown") + }) + utils.AddInterruptHandler(func() { + log.Info("Stopping reporter...") + reporter.Stop() + log.Info("Reporter shutdown") + }) + utils.AddInterruptHandler(func() { + log.Info("Stopping BTC client...") + btcClient.Stop() + log.Info("BTC client shutdown") + }) + + <-utils.InterruptHandlersDone + log.Info("Shutdown complete") +} diff --git a/cmd/submitter/submitter.go b/cmd/submitter/submitter.go new file mode 100644 index 00000000..315bf951 --- /dev/null +++ b/cmd/submitter/submitter.go @@ -0,0 +1,94 @@ +package submitter + +import ( + "github.com/babylonchain/vigilante/btcclient" + "github.com/babylonchain/vigilante/cmd/utils" + "github.com/babylonchain/vigilante/config" + vlog "github.com/babylonchain/vigilante/log" + "github.com/babylonchain/vigilante/metrics" + "github.com/babylonchain/vigilante/rpcserver" + "github.com/babylonchain/vigilante/vigilante" + "github.com/spf13/cobra" +) + +var ( + cfgFile = "" + log = vlog.Logger.WithField("module", "cmd") +) + +// GetCmd returns the cli query commands for this module +func GetCmd() *cobra.Command { + // Group epoching queries under a subcommand + cmd := &cobra.Command{ + Use: "submitter", + Short: "Vigilant submitter", + Run: cmdFunc, + } + addFlags(cmd) + return cmd +} + +func addFlags(cmd *cobra.Command) { + cmd.Flags().StringVar(&cfgFile, "config", "", "config file") +} + +func cmdFunc(cmd *cobra.Command, args []string) { + // get the config from the given file, the default file, or generate a default config + var err error + var cfg config.Config + if len(cfgFile) != 0 { + cfg, err = config.NewFromFile(cfgFile) + } else { + cfg, err = config.New() + } + if err != nil { + panic(err) + } + + // create BTC client + btcClient, err := btcclient.New(&cfg.BTC) + if err != nil { + panic(err) + } + // create submitter + submitter, err := vigilante.NewSubmitter(&cfg.Submitter, btcClient) + if err != nil { + panic(err) + } + // crete RPC server + server, err := rpcserver.New(&cfg.GRPC, submitter, nil) + if err != nil { + panic(err) + } + + // keep trying BTC client + btcClient.ConnectLoop() + // start submitter and sync + submitter.Start() + submitter.SynchronizeRPC(btcClient) + // start RPC server + server.Start() + // start Prometheus metrics server + metrics.Start() + + // SIGINT handling stuff + utils.AddInterruptHandler(func() { + // TODO: Does this need to wait for the grpc server to finish up any requests? + log.Info("Stopping RPC server...") + server.Stop() + log.Info("RPC server shutdown") + }) + utils.AddInterruptHandler(func() { + log.Info("Stopping submitter...") + submitter.Stop() + log.Info("Submitter shutdown") + }) + utils.AddInterruptHandler(func() { + log.Info("Stopping BTC client...") + btcClient.Stop() + log.Info("BTC client shutdown") + }) + + <-utils.InterruptHandlersDone + log.Info("Shutdown complete") +} diff --git a/cmd/utils/signal.go b/cmd/utils/signal.go new file mode 100644 index 00000000..4805bdc8 --- /dev/null +++ b/cmd/utils/signal.go @@ -0,0 +1,86 @@ +// Copyright (c) 2022-2022 The Babylon developers +// Copyright (c) 2013-2014 The btcsuite developers +// Use of this source code is governed by an ISC +// license that can be found in the LICENSE file. + +package utils + +import ( + "os" + "os/signal" + + vlog "github.com/babylonchain/vigilante/log" +) + +// interruptChannel is used to receive SIGINT (Ctrl+C) signals. +var interruptChannel chan os.Signal + +// addHandlerChannel is used to add an interrupt handler to the list of handlers +// to be invoked on SIGINT (Ctrl+C) signals. +var addHandlerChannel = make(chan func()) + +// InterruptHandlersDone is closed after all interrupt handlers run the first +// time an interrupt is signaled. +var InterruptHandlersDone = make(chan struct{}) + +var simulateInterruptChannel = make(chan struct{}, 1) + +// signals defines the signals that are handled to do a clean shutdown. +// Conditional compilation is used to also include SIGTERM on Unix. +var signals = []os.Signal{os.Interrupt} + +// simulateInterrupt requests invoking the clean termination process by an +// internal component instead of a SIGINT. +func simulateInterrupt() { + select { + case simulateInterruptChannel <- struct{}{}: + default: + } +} + +// mainInterruptHandler listens for SIGINT (Ctrl+C) signals on the +// interruptChannel and invokes the registered interruptCallbacks accordingly. +// It also listens for callback registration. It must be run as a goroutine. +func mainInterruptHandler() { + // interruptCallbacks is a list of callbacks to invoke when a + // SIGINT (Ctrl+C) is received. + var interruptCallbacks []func() + invokeCallbacks := func() { + // run handlers in LIFO order. + for i := range interruptCallbacks { + idx := len(interruptCallbacks) - 1 - i + interruptCallbacks[idx]() + } + close(InterruptHandlersDone) + } + + for { + select { + case sig := <-interruptChannel: + vlog.Logger.WithField("module", "cmd").Infof("Received signal (%s). Shutting down...", sig) + invokeCallbacks() + return + case <-simulateInterruptChannel: + vlog.Logger.WithField("module", "cmd").Infof("Received shutdown request. Shutting down...") + invokeCallbacks() + return + + case handler := <-addHandlerChannel: + interruptCallbacks = append(interruptCallbacks, handler) + } + } +} + +// AddInterruptHandler adds a handler to call when a SIGINT (Ctrl+C) is +// received. +func AddInterruptHandler(handler func()) { + // Create the channel and start the main interrupt handler which invokes + // all other callbacks and exits if not already done. + if interruptChannel == nil { + interruptChannel = make(chan os.Signal, 1) + signal.Notify(interruptChannel, signals...) + go mainInterruptHandler() + } + + addHandlerChannel <- handler +} diff --git a/cmd/utils/signalsigterm.go b/cmd/utils/signalsigterm.go new file mode 100644 index 00000000..b9310309 --- /dev/null +++ b/cmd/utils/signalsigterm.go @@ -0,0 +1,18 @@ +// Copyright (c) 2022-2022 The Babylon developers +// Copyright (c) 2016 The btcsuite developers +// Use of this source code is governed by an ISC +// license that can be found in the LICENSE file. + +//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris +// +build darwin dragonfly freebsd linux netbsd openbsd solaris + +package utils + +import ( + "os" + "syscall" +) + +func init() { + signals = []os.Signal{os.Interrupt, syscall.SIGTERM} +} diff --git a/config/config.go b/config/config.go new file mode 100644 index 00000000..0436a1e3 --- /dev/null +++ b/config/config.go @@ -0,0 +1,157 @@ +package config + +import ( + "errors" + "fmt" + "os" + "path/filepath" + + "github.com/btcsuite/btcd/btcutil" + "github.com/spf13/viper" +) + +const ( + // DefaultGRPCAddress defines the default address to bind the gRPC server to. + DefaultGRPCAddress = "0.0.0.0:8080" + + // DefaultGRPCWebAddress defines the default address to bind the gRPC-web server to. + DefaultGRPCWebAddress = "0.0.0.0:8081" + + defaultConfigFilename = "vigilante.yaml" + defaultLogLevel = "info" + defaultLogDirname = "logs" + defaultLogFilename = "vigilante.log" + defaultRPCMaxClients = 10 + defaultRPCMaxWebsockets = 25 +) + +var ( + btcdDefaultCAFile = filepath.Join(btcutil.AppDataDir("btcd", false), "rpc.cert") + defaultAppDataDir = btcutil.AppDataDir("babylon-vigilante", false) + defaultConfigFile = filepath.Join(defaultAppDataDir, defaultConfigFilename) + defaultRPCKeyFile = filepath.Join(defaultAppDataDir, "rpc.key") + defaultRPCCertFile = filepath.Join(defaultAppDataDir, "rpc.cert") + defaultLogDir = filepath.Join(defaultAppDataDir, defaultLogDirname) +) + +// BaseConfig defines the server's basic configuration +type BaseConfig struct { + Placeholder string `mapstructure:"placeholder"` +} + +// BTCConfig defines the server's basic configuration +type BTCConfig struct { + DisableClientTLS bool `mapstructure:"noclienttls"` + CAFile string `mapstructure:"cafile"` + Endpoint string `mapstructure:"endpoint"` + NetParams string `mapstructure:"netparams"` + Username string `mapstructure:"username"` + Password string `mapstructure:"password"` + ReconnectAttempts int `mapstructure:"reconnect"` +} + +// GRPCConfig defines configuration for the gRPC server. +type GRPCConfig struct { + OneTimeTLSKey bool `mapstructure:"onetimetlskey"` + RPCKeyFile string `mapstructure:"rpckey"` + RPCCertFile string `mapstructure:"rpccert"` + Endpoints []string `mapstructure:"endpoints"` +} + +// GRPCWebConfig defines configuration for the gRPC-web server. +type GRPCWebConfig struct { + Placeholder string `mapstructure:"placeholder"` +} + +// SubmitterConfig defines configuration for the gRPC-web server. +type SubmitterConfig struct { + Placeholder string `mapstructure:"placeholder"` +} + +// ReporterConfig defines configuration for the gRPC-web server. +type ReporterConfig struct { + Placeholder string `mapstructure:"placeholder"` +} + +// Config defines the server's top level configuration +type Config struct { + Base BaseConfig `mapstructure:"base"` + BTC BTCConfig `mapstructure:"btc"` + GRPC GRPCConfig `mapstructure:"grpc"` + GRPCWeb GRPCWebConfig `mapstructure:"grpc-web"` + Submitter SubmitterConfig `mapstructure:"submitter"` + Reporter ReporterConfig `mapstructure:"reporter"` +} + +// DefaultConfig returns server's default configuration. +func DefaultConfig() *Config { + return &Config{ + Base: BaseConfig{ + Placeholder: "baseconfig", + }, + BTC: BTCConfig{ + DisableClientTLS: false, + CAFile: btcdDefaultCAFile, + Endpoint: "localhost:18554", + NetParams: "simnet", + Username: "user", + Password: "pass", + ReconnectAttempts: 3, + }, + GRPC: GRPCConfig{ + OneTimeTLSKey: true, + RPCKeyFile: defaultRPCKeyFile, + RPCCertFile: defaultRPCCertFile, + Endpoints: []string{"localhost:8080"}, + }, + GRPCWeb: GRPCWebConfig{ + Placeholder: "grpcwebconfig", + }, + Submitter: SubmitterConfig{ + Placeholder: "submitterconfig", + }, + Reporter: ReporterConfig{ + Placeholder: "reporterconfig", + }, + } +} + +// New returns a fully parsed Config object, from either +// - the config file in the default directory, or +// - the default config object (if the config file in the default directory does not exist) +func New() (Config, error) { + if _, err := os.Stat(defaultConfigFile); err == nil { // read config from default config file + viper.SetConfigFile(defaultConfigFile) + if err := viper.ReadInConfig(); err != nil { + return Config{}, err + } + log.Infof("Successfully loaded config file at %s", defaultConfigFile) + var cfg Config + err = viper.Unmarshal(&cfg) + return cfg, err + } else if errors.Is(err, os.ErrNotExist) { // default config file does not exist, use the default config + log.Infof("no config file found at %s, using the default config", defaultConfigFile) + cfg := DefaultConfig() + return *cfg, nil + } else { // other errors + return Config{}, err + } +} + +// NewFromFile returns a fully parsed Config object from a given file directory +func NewFromFile(configFile string) (Config, error) { + if _, err := os.Stat(configFile); err == nil { // the given file exists, parse it + viper.SetConfigFile(configFile) + if err := viper.ReadInConfig(); err != nil { + return Config{}, err + } + log.Infof("Successfully loaded config file at %s", configFile) + var cfg Config + err = viper.Unmarshal(&cfg) + return cfg, err + } else if errors.Is(err, os.ErrNotExist) { // the given config file does not exist, return error + return Config{}, fmt.Errorf("no config file found at %s", configFile) + } else { // other errors + return Config{}, err + } +} diff --git a/config/log.go b/config/log.go new file mode 100644 index 00000000..ebde4c94 --- /dev/null +++ b/config/log.go @@ -0,0 +1,7 @@ +package config + +import ( + vlog "github.com/babylonchain/vigilante/log" +) + +var log = vlog.Logger.WithField("module", "config") diff --git a/go.mod b/go.mod new file mode 100644 index 00000000..903287ae --- /dev/null +++ b/go.mod @@ -0,0 +1,67 @@ +module github.com/babylonchain/vigilante + +go 1.18 + +require ( + github.com/btcsuite/btcd v0.23.1 + github.com/btcsuite/btcd/btcutil v1.1.1 + github.com/btcsuite/btcwallet v0.15.1 + github.com/grpc-ecosystem/go-grpc-middleware v1.3.0 + github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 + github.com/prometheus/client_golang v1.13.0 + github.com/sirupsen/logrus v1.9.0 + github.com/spf13/cobra v1.5.0 + github.com/spf13/viper v1.12.0 + golang.org/x/net v0.0.0-20220802222814-0bcc04d9c69b + google.golang.org/grpc v1.48.0 + google.golang.org/protobuf v1.28.1 +) + +require ( + github.com/aead/siphash v1.0.1 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/btcsuite/btcd/btcec/v2 v2.1.3 // indirect + github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 // indirect + github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f // indirect + github.com/btcsuite/btcwallet/walletdb v1.4.0 // indirect + github.com/btcsuite/btcwallet/wtxmgr v1.5.0 // indirect + github.com/btcsuite/go-socks v0.0.0-20170105172521-4720035b7bfd // indirect + github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792 // indirect + github.com/cespare/xxhash/v2 v2.1.2 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/decred/dcrd/crypto/blake256 v1.0.0 // indirect + github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect + github.com/decred/dcrd/lru v1.0.0 // indirect + github.com/fsnotify/fsnotify v1.5.4 // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/hashicorp/hcl v1.0.0 // indirect + github.com/inconshreveable/mousetrap v1.0.0 // indirect + github.com/kkdai/bstream v0.0.0-20181106074824-b3251f7901ec // indirect + github.com/lightninglabs/gozmq v0.0.0-20191113021534-d20a764486bf // indirect + github.com/lightninglabs/neutrino v0.14.2 // indirect + github.com/lightningnetwork/lnd/clock v1.0.1 // indirect + github.com/lightningnetwork/lnd/queue v1.0.1 // indirect + github.com/lightningnetwork/lnd/ticker v1.1.0 // indirect + github.com/lightningnetwork/lnd/tlv v1.0.2 // indirect + github.com/magiconair/properties v1.8.6 // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect + github.com/mitchellh/mapstructure v1.5.0 // indirect + github.com/pelletier/go-toml v1.9.5 // indirect + github.com/pelletier/go-toml/v2 v2.0.1 // indirect + github.com/prometheus/client_model v0.2.0 // indirect + github.com/prometheus/common v0.37.0 // indirect + github.com/prometheus/procfs v0.8.0 // indirect + github.com/spf13/afero v1.8.2 // indirect + github.com/spf13/cast v1.5.0 // indirect + github.com/spf13/jwalterweatherman v1.1.0 // indirect + github.com/spf13/pflag v1.0.5 // indirect + github.com/stretchr/testify v1.8.0 // indirect + github.com/subosito/gotenv v1.3.0 // indirect + golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 // indirect + golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10 // indirect + golang.org/x/text v0.3.7 // indirect + google.golang.org/genproto v0.0.0-20220519153652-3a47de7e79bd // indirect + gopkg.in/ini.v1 v1.66.4 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 00000000..d5b9492f --- /dev/null +++ b/go.sum @@ -0,0 +1,755 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.44.3/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= +cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4= +cloud.google.com/go v0.53.0/go.mod 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v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= +honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k= +honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k= +rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= +rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0= +rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA= diff --git a/log/logger.go b/log/logger.go new file mode 100644 index 00000000..0a3ba486 --- /dev/null +++ b/log/logger.go @@ -0,0 +1,16 @@ +package log + +import ( + "os" + + "github.com/sirupsen/logrus" +) + +var Logger = &logrus.Logger{ + Out: os.Stderr, + Level: logrus.DebugLevel, + Formatter: &logrus.TextFormatter{ + DisableColors: false, + FullTimestamp: true, + }, +} diff --git a/metrics/log.go b/metrics/log.go new file mode 100644 index 00000000..6a4d97eb --- /dev/null +++ b/metrics/log.go @@ -0,0 +1,7 @@ +package metrics + +import ( + vlog "github.com/babylonchain/vigilante/log" +) + +var log = vlog.Logger.WithField("module", "metrics") diff --git a/metrics/prometheus.go b/metrics/prometheus.go new file mode 100644 index 00000000..e847e2f7 --- /dev/null +++ b/metrics/prometheus.go @@ -0,0 +1,38 @@ +package metrics + +import ( + "net/http" + + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/collectors" + "github.com/prometheus/client_golang/prometheus/promhttp" +) + +func Start() { + go start() +} + +func start() { + // Create a new registry. + reg := prometheus.NewRegistry() + + addr := "localhost:2112" // TODO: move this to config + + // Add Go module build info. + reg.MustRegister(collectors.NewBuildInfoCollector()) + reg.MustRegister(collectors.NewGoCollector( + collectors.WithGoCollections(collectors.GoRuntimeMemStatsCollection | collectors.GoRuntimeMetricsCollection), + )) + // TODO: add more metrics + + // Expose the registered metrics via HTTP. + http.Handle("/metrics", promhttp.HandlerFor( + reg, + promhttp.HandlerOpts{ + // Opt into OpenMetrics to support exemplars. + EnableOpenMetrics: true, + }, + )) + log.Infof("Successfully started Prometheus metrics server at %s", addr) + log.Fatal(http.ListenAndServe(addr, nil)) +} diff --git a/netparams/babylon.go b/netparams/babylon.go new file mode 100644 index 00000000..23f6e0ba --- /dev/null +++ b/netparams/babylon.go @@ -0,0 +1,3 @@ +package netparams + +// TODO: add Babylon parameters here diff --git a/netparams/bitcoin.go b/netparams/bitcoin.go new file mode 100644 index 00000000..1d6b0f86 --- /dev/null +++ b/netparams/bitcoin.go @@ -0,0 +1,20 @@ +package netparams + +import ( + "github.com/btcsuite/btcd/chaincfg" +) + +func GetBTCParams(net string) *chaincfg.Params { + switch net { + case "mainnet": + return &chaincfg.MainNetParams + case "testnet": + return &chaincfg.TestNet3Params + case "signet": + return &chaincfg.SigNetParams + case "simnet": + return &chaincfg.SimNetParams + default: + return &chaincfg.SimNetParams + } +} diff --git a/rpcserver/README.md b/rpcserver/README.md new file mode 100644 index 00000000..1683d4d5 --- /dev/null +++ b/rpcserver/README.md @@ -0,0 +1,9 @@ +# rpcserver + +This package implements a GRPC server. The code is adapted from https://github.com/btcsuite/btcwallet/tree/master/rpc. + +To test: + +```bash +$ grpcurl --insecure localhost:8080 rpc.VigilanteService/Version +``` \ No newline at end of file diff --git a/rpcserver/api.proto b/rpcserver/api.proto new file mode 100644 index 00000000..cb28584d --- /dev/null +++ b/rpcserver/api.proto @@ -0,0 +1,18 @@ +syntax = "proto3"; +package rpc; +option go_package = "./"; + +service VigilanteService { + rpc Version (VersionRequest) returns (VersionResponse); +} + +message VersionRequest { +} +message VersionResponse { + string version_string = 1; + uint32 major = 2; + uint32 minor = 3; + uint32 patch = 4; + string prerelease = 5; + string build_metadata = 6; +} \ No newline at end of file diff --git a/rpcserver/api/api.pb.go b/rpcserver/api/api.pb.go new file mode 100644 index 00000000..b7a8951c --- /dev/null +++ b/rpcserver/api/api.pb.go @@ -0,0 +1,333 @@ +// Code generated by protoc-gen-go. DO NOT EDIT. +// versions: +// protoc-gen-go v1.28.0 +// protoc v3.21.2 +// source: api.proto + +package __ + +import ( + context "context" + grpc "google.golang.org/grpc" + codes "google.golang.org/grpc/codes" + status "google.golang.org/grpc/status" + protoreflect "google.golang.org/protobuf/reflect/protoreflect" + protoimpl "google.golang.org/protobuf/runtime/protoimpl" + reflect "reflect" + sync "sync" +) + +const ( + // Verify that this generated code is sufficiently up-to-date. + _ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion) + // Verify that runtime/protoimpl is sufficiently up-to-date. + _ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20) +) + +type VersionRequest struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields +} + +func (x *VersionRequest) Reset() { + *x = VersionRequest{} + if protoimpl.UnsafeEnabled { + mi := &file_api_proto_msgTypes[0] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *VersionRequest) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*VersionRequest) ProtoMessage() {} + +func (x *VersionRequest) ProtoReflect() protoreflect.Message { + mi := &file_api_proto_msgTypes[0] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use VersionRequest.ProtoReflect.Descriptor instead. +func (*VersionRequest) Descriptor() ([]byte, []int) { + return file_api_proto_rawDescGZIP(), []int{0} +} + +type VersionResponse struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + VersionString string `protobuf:"bytes,1,opt,name=version_string,json=versionString,proto3" json:"version_string,omitempty"` + Major uint32 `protobuf:"varint,2,opt,name=major,proto3" json:"major,omitempty"` + Minor uint32 `protobuf:"varint,3,opt,name=minor,proto3" json:"minor,omitempty"` + Patch uint32 `protobuf:"varint,4,opt,name=patch,proto3" json:"patch,omitempty"` + Prerelease string `protobuf:"bytes,5,opt,name=prerelease,proto3" json:"prerelease,omitempty"` + BuildMetadata string `protobuf:"bytes,6,opt,name=build_metadata,json=buildMetadata,proto3" json:"build_metadata,omitempty"` +} + +func (x *VersionResponse) Reset() { + *x = VersionResponse{} + if protoimpl.UnsafeEnabled { + mi := &file_api_proto_msgTypes[1] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *VersionResponse) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*VersionResponse) ProtoMessage() {} + +func (x *VersionResponse) ProtoReflect() protoreflect.Message { + mi := &file_api_proto_msgTypes[1] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use VersionResponse.ProtoReflect.Descriptor instead. +func (*VersionResponse) Descriptor() ([]byte, []int) { + return file_api_proto_rawDescGZIP(), []int{1} +} + +func (x *VersionResponse) GetVersionString() string { + if x != nil { + return x.VersionString + } + return "" +} + +func (x *VersionResponse) GetMajor() uint32 { + if x != nil { + return x.Major + } + return 0 +} + +func (x *VersionResponse) GetMinor() uint32 { + if x != nil { + return x.Minor + } + return 0 +} + +func (x *VersionResponse) GetPatch() uint32 { + if x != nil { + return x.Patch + } + return 0 +} + +func (x *VersionResponse) GetPrerelease() string { + if x != nil { + return x.Prerelease + } + return "" +} + +func (x *VersionResponse) GetBuildMetadata() string { + if x != nil { + return x.BuildMetadata + } + return "" +} + +var File_api_proto protoreflect.FileDescriptor + +var file_api_proto_rawDesc = []byte{ + 0x0a, 0x09, 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0x65, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x18, 0x05, 0x20, + 0x01, 0x28, 0x09, 0x52, 0x0a, 0x70, 0x72, 0x65, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x12, + 0x25, 0x0a, 0x0e, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f, 0x6d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, + 0x61, 0x18, 0x06, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0d, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x4d, 0x65, + 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x32, 0x48, 0x0a, 0x10, 0x56, 0x69, 0x67, 0x69, 0x6c, 0x61, + 0x6e, 0x74, 0x65, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x12, 0x34, 0x0a, 0x07, 0x56, 0x65, + 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x12, 0x13, 0x2e, 0x72, 0x70, 0x63, 0x2e, 0x56, 0x65, 0x72, 0x73, + 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x14, 0x2e, 0x72, 0x70, 0x63, + 0x2e, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, + 0x42, 0x04, 0x5a, 0x02, 0x2e, 0x2f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33, +} + +var ( + file_api_proto_rawDescOnce sync.Once + file_api_proto_rawDescData = file_api_proto_rawDesc +) + +func file_api_proto_rawDescGZIP() []byte { + file_api_proto_rawDescOnce.Do(func() { + file_api_proto_rawDescData = protoimpl.X.CompressGZIP(file_api_proto_rawDescData) + }) + return file_api_proto_rawDescData +} + +var file_api_proto_msgTypes = make([]protoimpl.MessageInfo, 2) +var file_api_proto_goTypes = []interface{}{ + (*VersionRequest)(nil), // 0: rpc.VersionRequest + (*VersionResponse)(nil), // 1: rpc.VersionResponse +} +var file_api_proto_depIdxs = []int32{ + 0, // 0: rpc.VigilanteService.Version:input_type -> rpc.VersionRequest + 1, // 1: rpc.VigilanteService.Version:output_type -> rpc.VersionResponse + 1, // [1:2] is the sub-list for method output_type + 0, // [0:1] is the sub-list for method input_type + 0, // [0:0] is the sub-list for extension type_name + 0, // [0:0] is the sub-list for extension extendee + 0, // [0:0] is the sub-list for field type_name +} + +func init() { file_api_proto_init() } +func file_api_proto_init() { + if File_api_proto != nil { + return + } + if !protoimpl.UnsafeEnabled { + file_api_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*VersionRequest); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + file_api_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*VersionResponse); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + } + type x struct{} + out := protoimpl.TypeBuilder{ + File: protoimpl.DescBuilder{ + GoPackagePath: reflect.TypeOf(x{}).PkgPath(), + RawDescriptor: file_api_proto_rawDesc, + NumEnums: 0, + NumMessages: 2, + NumExtensions: 0, + NumServices: 1, + }, + GoTypes: file_api_proto_goTypes, + DependencyIndexes: file_api_proto_depIdxs, + MessageInfos: file_api_proto_msgTypes, + }.Build() + File_api_proto = out.File + file_api_proto_rawDesc = nil + file_api_proto_goTypes = nil + file_api_proto_depIdxs = nil +} + +// Reference imports to suppress errors if they are not otherwise used. +var _ context.Context +var _ grpc.ClientConnInterface + +// This is a compile-time assertion to ensure that this generated file +// is compatible with the grpc package it is being compiled against. +const _ = grpc.SupportPackageIsVersion6 + +// VigilanteServiceClient is the client API for VigilanteService service. +// +// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream. +type VigilanteServiceClient interface { + Version(ctx context.Context, in *VersionRequest, opts ...grpc.CallOption) (*VersionResponse, error) +} + +type vigilanteServiceClient struct { + cc grpc.ClientConnInterface +} + +func NewVigilanteServiceClient(cc grpc.ClientConnInterface) VigilanteServiceClient { + return &vigilanteServiceClient{cc} +} + +func (c *vigilanteServiceClient) Version(ctx context.Context, in *VersionRequest, opts ...grpc.CallOption) (*VersionResponse, error) { + out := new(VersionResponse) + err := c.cc.Invoke(ctx, "/rpc.VigilanteService/Version", in, out, opts...) + if err != nil { + return nil, err + } + return out, nil +} + +// VigilanteServiceServer is the server API for VigilanteService service. +type VigilanteServiceServer interface { + Version(context.Context, *VersionRequest) (*VersionResponse, error) +} + +// UnimplementedVigilanteServiceServer can be embedded to have forward compatible implementations. +type UnimplementedVigilanteServiceServer struct { +} + +func (*UnimplementedVigilanteServiceServer) Version(context.Context, *VersionRequest) (*VersionResponse, error) { + return nil, status.Errorf(codes.Unimplemented, "method Version not implemented") +} + +func RegisterVigilanteServiceServer(s *grpc.Server, srv VigilanteServiceServer) { + s.RegisterService(&_VigilanteService_serviceDesc, srv) +} + +func _VigilanteService_Version_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) { + in := new(VersionRequest) + if err := dec(in); err != nil { + return nil, err + } + if interceptor == nil { + return srv.(VigilanteServiceServer).Version(ctx, in) + } + info := &grpc.UnaryServerInfo{ + Server: srv, + FullMethod: "/rpc.VigilanteService/Version", + } + handler := func(ctx context.Context, req interface{}) (interface{}, error) { + return srv.(VigilanteServiceServer).Version(ctx, req.(*VersionRequest)) + } + return interceptor(ctx, in, info, handler) +} + +var _VigilanteService_serviceDesc = grpc.ServiceDesc{ + ServiceName: "rpc.VigilanteService", + HandlerType: (*VigilanteServiceServer)(nil), + Methods: []grpc.MethodDesc{ + { + MethodName: "Version", + Handler: _VigilanteService_Version_Handler, + }, + }, + Streams: []grpc.StreamDesc{}, + Metadata: "api.proto", +} diff --git a/rpcserver/log.go b/rpcserver/log.go new file mode 100644 index 00000000..0b8d9c96 --- /dev/null +++ b/rpcserver/log.go @@ -0,0 +1,7 @@ +package rpcserver + +import ( + vlog "github.com/babylonchain/vigilante/log" +) + +var log = vlog.Logger.WithField("module", "rpcserver") diff --git a/rpcserver/regen.sh b/rpcserver/regen.sh new file mode 100755 index 00000000..3dc6149f --- /dev/null +++ b/rpcserver/regen.sh @@ -0,0 +1,3 @@ +#!/bin/sh + +protoc -I. --go_out=plugins=grpc:api api.proto diff --git a/rpcserver/server.go b/rpcserver/server.go new file mode 100644 index 00000000..94e4075d --- /dev/null +++ b/rpcserver/server.go @@ -0,0 +1,88 @@ +// Copyright (c) 2022-2022 The Babylon developers +// Copyright (c) 2015-2016 The btcsuite developers +// Use of this source code is governed by an ISC +// license that can be found in the LICENSE file. + +// Package rpcserver implements the RPC API and is used by the main package to +// start gRPC services. +// +// Full documentation of the API implemented by this package is maintained in a +// language-agnostic document: +// +// https://github.com/btcsuite/btcwallet/blob/master/rpc/documentation/api.md +// +// Any API changes must be performed according to the steps listed here: +// +// https://github.com/btcsuite/btcwallet/blob/master/rpc/documentation/serverchanges.md +package rpcserver + +import ( + "fmt" + "net" + + "github.com/babylonchain/vigilante/config" + "github.com/babylonchain/vigilante/vigilante" + grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware" + grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus" + "google.golang.org/grpc" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/reflection" +) + +type Server struct { + *grpc.Server + Cfg *config.GRPCConfig + Submitter *vigilante.Submitter + Reporter *vigilante.Reporter +} + +func New(cfg *config.GRPCConfig, submitter *vigilante.Submitter, reporter *vigilante.Reporter) (*Server, error) { + if submitter == nil && reporter == nil { + return nil, fmt.Errorf("At least one of submitter and reporter should be non-empty") + } + + keyPair, err := openRPCKeyPair(cfg.OneTimeTLSKey, cfg.RPCKeyFile, cfg.RPCCertFile) + if err != nil { + return nil, fmt.Errorf("Open RPC key pair: %v", err) + } + creds := credentials.NewServerTLSFromCert(&keyPair) + + server := grpc.NewServer( + grpc.Creds(creds), + grpc.StreamInterceptor(grpc_middleware.ChainStreamServer( + grpc_prometheus.StreamServerInterceptor, + )), + grpc.ChainUnaryInterceptor(grpc_middleware.ChainUnaryServer( + grpc_prometheus.UnaryServerInterceptor, + )), + ) + reflection.Register(server) // register reflection service + StartVigilanteService(server) // register our vigilante service + grpc_prometheus.Register(server) // register Prometheus metrics service + + return &Server{server, cfg, submitter, reporter}, nil +} + +func (s *Server) Start() { + // create listeners for endpoints + // TODO: negotiate API version + listeners := []net.Listener{} + for _, endpoint := range s.Cfg.Endpoints { + lis, err := net.Listen("tcp", endpoint) + if err != nil { + log.Errorf("Listen: %v", err) + } else { + listeners = append(listeners, lis) + } + } + + // start the server with listeners, each in a goroutine + for _, lis := range listeners { + go func(l net.Listener) { + if err := s.Serve(l); err != nil { + log.Errorf("Serve RPC server: %v", err) + } + }(lis) + log.Infof("Successfully started the GRPC server at %v", lis.Addr().String()) + } +} diff --git a/rpcserver/service.go b/rpcserver/service.go new file mode 100644 index 00000000..73fff9e7 --- /dev/null +++ b/rpcserver/service.go @@ -0,0 +1,33 @@ +package rpcserver + +import ( + "golang.org/x/net/context" + "google.golang.org/grpc" + + pb "github.com/babylonchain/vigilante/rpcserver/api" +) + +// Public API version constants +const ( + verString = "0.0.1" + verMajor = 0 + verMinor = 0 + verPatch = 1 +) + +type service struct{} + +// StartVigilanteService creates an implementation of the VigilanteService and +// registers it with the gRPC server. +func StartVigilanteService(gs *grpc.Server) { + pb.RegisterVigilanteServiceServer(gs, &service{}) +} + +func (s *service) Version(ctx context.Context, req *pb.VersionRequest) (*pb.VersionResponse, error) { + return &pb.VersionResponse{ + VersionString: verString, + Major: verMajor, + Minor: verMinor, + Patch: verPatch, + }, nil +} diff --git a/rpcserver/tls.go b/rpcserver/tls.go new file mode 100644 index 00000000..d7c27725 --- /dev/null +++ b/rpcserver/tls.go @@ -0,0 +1,88 @@ +package rpcserver + +import ( + "crypto/tls" + "fmt" + "io/ioutil" + "os" + "path/filepath" + "time" + + "github.com/btcsuite/btcd/btcutil" +) + +// openRPCKeyPair creates or loads the RPC TLS keypair specified by the +// application config. This function respects the cfg.OneTimeTLSKey setting. +func openRPCKeyPair(oneTimeTLSKey bool, RPCKeyFile string, RPCCertFile string) (tls.Certificate, error) { + // Check for existence of the TLS key file. If one time TLS keys are + // enabled but a key already exists, this function should error since + // it's possible that a persistent certificate was copied to a remote + // machine. Otherwise, generate a new keypair when the key is missing. + // When generating new persistent keys, overwriting an existing cert is + // acceptable if the previous execution used a one time TLS key. + // Otherwise, both the cert and key should be read from disk. If the + // cert is missing, the read error will occur in LoadX509KeyPair. + _, e := os.Stat(RPCKeyFile) + keyExists := !os.IsNotExist(e) + switch { + case oneTimeTLSKey && keyExists: + err := fmt.Errorf("one time TLS keys are enabled, but TLS key "+ + "`%s` already exists", RPCKeyFile) + return tls.Certificate{}, err + case oneTimeTLSKey: + return generateRPCKeyPair(RPCKeyFile, RPCCertFile, false) + case !keyExists: + return generateRPCKeyPair(RPCKeyFile, RPCCertFile, true) + default: + return tls.LoadX509KeyPair(RPCCertFile, RPCKeyFile) + } +} + +// generateRPCKeyPair generates a new RPC TLS keypair and writes the cert and +// possibly also the key in PEM format to the paths specified by the config. If +// successful, the new keypair is returned. +func generateRPCKeyPair(RPCKeyFile string, RPCCertFile string, writeKey bool) (tls.Certificate, error) { + // Create directories for cert and key files if they do not yet exist. + certDir, _ := filepath.Split(RPCCertFile) + keyDir, _ := filepath.Split(RPCKeyFile) + err := os.MkdirAll(certDir, 0700) + if err != nil { + return tls.Certificate{}, err + } + err = os.MkdirAll(keyDir, 0700) + if err != nil { + return tls.Certificate{}, err + } + + // Generate cert pair. + org := "Babylon vigilante autogenerated cert" + validUntil := time.Now().Add(time.Hour * 24 * 365 * 10) + cert, key, err := btcutil.NewTLSCertPair(org, validUntil, nil) + if err != nil { + return tls.Certificate{}, err + } + keyPair, err := tls.X509KeyPair(cert, key) + if err != nil { + return tls.Certificate{}, err + } + + // Write cert and (potentially) the key files. + err = ioutil.WriteFile(RPCCertFile, cert, 0600) + if err != nil { + return tls.Certificate{}, err + } + if writeKey { + err = ioutil.WriteFile(RPCKeyFile, key, 0600) + if err != nil { + rmErr := os.Remove(RPCCertFile) + if rmErr != nil { + log.Warnf("Cannot remove written certificates: %v", + rmErr) + } + return tls.Certificate{}, err + } + } + + log.Info("Successfully generated TLS certificates for the RPC server") + return keyPair, nil +} diff --git a/sample-vigilante.yaml b/sample-vigilante.yaml new file mode 100644 index 00000000..1e0234fa --- /dev/null +++ b/sample-vigilante.yaml @@ -0,0 +1,22 @@ +base: + placeholder: baseconfig +btc: + cafile: //Btcd/rpc.cert + endpoint: localhost:18554 + netparams: simnet + noclienttls: false + password: pass + reconnect: 3 + username: user +grpc: + endpoints: + - localhost:8080 + onetimetlskey: true + rpccert: //Babylon-vigilante/rpc.cert + rpckey: //Babylon-vigilante/rpc.key +grpc-web: + placeholder: grpcwebconfig +reporter: + placeholder: reporterconfig +submitter: + placeholder: submitterconfig diff --git a/vigilante/README.md b/vigilante/README.md new file mode 100644 index 00000000..ef6a2af5 --- /dev/null +++ b/vigilante/README.md @@ -0,0 +1,3 @@ +# vigilante + +This package implements the vigilantes, including the vigilant submitter and the vigilant reporter. The code is adapted from https://github.com/btcsuite/btcwallet/tree/master/wallet. \ No newline at end of file diff --git a/vigilante/log.go b/vigilante/log.go new file mode 100644 index 00000000..4052f5ab --- /dev/null +++ b/vigilante/log.go @@ -0,0 +1,7 @@ +package vigilante + +import ( + vlog "github.com/babylonchain/vigilante/log" +) + +var log = vlog.Logger.WithField("module", "vigilante") diff --git a/vigilante/reporter.go b/vigilante/reporter.go new file mode 100644 index 00000000..5aa71364 --- /dev/null +++ b/vigilante/reporter.go @@ -0,0 +1,165 @@ +package vigilante + +import ( + "errors" + "sync" + + "github.com/babylonchain/vigilante/btcclient" + "github.com/babylonchain/vigilante/config" +) + +type Reporter struct { + btcClient *btcclient.Client + btcClientLock sync.Mutex + // TODO: add Babylon client + + wg sync.WaitGroup + + started bool + quit chan struct{} + quitMu sync.Mutex +} + +func NewReporter(cfg *config.ReporterConfig, btcClient *btcclient.Client) (*Reporter, error) { + return &Reporter{ + btcClient: btcClient, + quit: make(chan struct{}), + }, nil +} + +// Start starts the goroutines necessary to manage a vigilante. +func (r *Reporter) Start() { + r.quitMu.Lock() + select { + case <-r.quit: + // Restart the vigilante goroutines after shutdown finishes. + r.WaitForShutdown() + r.quit = make(chan struct{}) + default: + // Ignore when the vigilante is still running. + if r.started { + r.quitMu.Unlock() + return + } + r.started = true + } + r.quitMu.Unlock() + + log.Infof("Successfully created the vigilant reporter") + + // r.wg.Add(2) + // go r.txCreator() + // go r.walletLocker() +} + +// SynchronizeRPC associates the vigilante with the consensus RPC client, +// synchronizes the vigilante with the latest changes to the blockchain, and +// continuously updates the vigilante through RPC notifications. +// +// This method is unstable and will be removed when all syncing logic is moved +// outside of the vigilante package. +func (r *Reporter) SynchronizeRPC(btcClient *btcclient.Client) { + r.quitMu.Lock() + select { + case <-r.quit: + r.quitMu.Unlock() + return + default: + } + r.quitMu.Unlock() + + // TODO: Ignoring the new client when one is already set breaks callers + // who are replacing the client, perhaps after a disconnect. + r.btcClientLock.Lock() + if r.btcClient != nil { + r.btcClientLock.Unlock() + return + } + r.btcClient = btcClient + r.btcClientLock.Unlock() + + // TODO: add internal logic of reporter + // TODO: It would be preferable to either run these goroutines + // separately from the vigilante (use vigilante mutator functions to + // make changes from the RPC client) and not have to stop and + // restart them each time the client disconnects and reconnets. + // r.wg.Add(4) + // go r.handleChainNotifications() + // go r.rescanBatchHandler() + // go r.rescanProgressHandler() + // go r.rescanRPCHandler() +} + +// requirebtcClient marks that a vigilante method can only be completed when the +// consensus RPC server is set. This function and all functions that call it +// are unstable and will need to be moved when the syncing code is moved out of +// the vigilante. +func (r *Reporter) requireGetBtcClient() (*btcclient.Client, error) { + r.btcClientLock.Lock() + btcClient := r.btcClient + r.btcClientLock.Unlock() + if btcClient == nil { + return nil, errors.New("blockchain RPC is inactive") + } + return btcClient, nil +} + +// btcClient returns the optional consensus RPC client associated with the +// vigilante. +// +// This function is unstable and will be removed once sync logic is moved out of +// the vigilante. +func (r *Reporter) getBtcClient() *btcclient.Client { + r.btcClientLock.Lock() + btcClient := r.btcClient + r.btcClientLock.Unlock() + return btcClient +} + +// quitChan atomically reads the quit channel. +func (r *Reporter) quitChan() <-chan struct{} { + r.quitMu.Lock() + c := r.quit + r.quitMu.Unlock() + return c +} + +// Stop signals all vigilante goroutines to shutdown. +func (r *Reporter) Stop() { + r.quitMu.Lock() + quit := r.quit + r.quitMu.Unlock() + + select { + case <-quit: + default: + close(quit) + r.btcClientLock.Lock() + if r.btcClient != nil { + r.btcClient.Stop() + r.btcClient = nil + } + r.btcClientLock.Unlock() + } +} + +// ShuttingDown returns whether the vigilante is currently in the process of +// shutting down or not. +func (r *Reporter) ShuttingDown() bool { + select { + case <-r.quitChan(): + return true + default: + return false + } +} + +// WaitForShutdown blocks until all vigilante goroutines have finished executing. +func (r *Reporter) WaitForShutdown() { + r.btcClientLock.Lock() + if r.btcClient != nil { + r.btcClient.WaitForShutdown() + } + r.btcClientLock.Unlock() + r.wg.Wait() +} diff --git a/vigilante/submitter.go b/vigilante/submitter.go new file mode 100644 index 00000000..51a8b885 --- /dev/null +++ b/vigilante/submitter.go @@ -0,0 +1,167 @@ +package vigilante + +import ( + "errors" + "sync" + + "github.com/babylonchain/vigilante/btcclient" + "github.com/babylonchain/vigilante/config" +) + +type Submitter struct { + btcClient *btcclient.Client + btcClientLock sync.Mutex + // TODO: add Babylon client + // TODO: add wallet client + + // TODO: add Babylon parameters + wg sync.WaitGroup + + started bool + quit chan struct{} + quitMu sync.Mutex +} + +func NewSubmitter(cfg *config.SubmitterConfig, btcClient *btcclient.Client) (*Submitter, error) { + return &Submitter{ + btcClient: btcClient, + quit: make(chan struct{}), + }, nil +} + +// Start starts the goroutines necessary to manage a vigilante. +func (s *Submitter) Start() { + s.quitMu.Lock() + select { + case <-s.quit: + // Restart the vigilante goroutines after shutdown finishes. + s.WaitForShutdown() + s.quit = make(chan struct{}) + default: + // Ignore when the vigilante is still running. + if s.started { + s.quitMu.Unlock() + return + } + s.started = true + } + s.quitMu.Unlock() + + log.Infof("Successfully created the vigilant submitter") + + // s.wg.Add(2) + // go s.txCreator() + // go s.walletLocker() +} + +// SynchronizeRPC associates the vigilante with the consensus RPC client, +// synchronizes the vigilante with the latest changes to the blockchain, and +// continuously updates the vigilante through RPC notifications. +// +// This method is unstable and will be removed when all syncing logic is moved +// outside of the vigilante package. +func (s *Submitter) SynchronizeRPC(btcClient *btcclient.Client) { + s.quitMu.Lock() + select { + case <-s.quit: + s.quitMu.Unlock() + return + default: + } + s.quitMu.Unlock() + + // TODO: Ignoring the new client when one is already set breaks callers + // who are replacing the client, perhaps after a disconnect. + s.btcClientLock.Lock() + if s.btcClient != nil { + s.btcClientLock.Unlock() + return + } + s.btcClient = btcClient + s.btcClientLock.Unlock() + + // TODO: add internal logic of submitter + // TODO: It would be preferable to either run these goroutines + // separately from the vigilante (use vigilante mutator functions to + // make changes from the RPC client) and not have to stop and + // restart them each time the client disconnects and reconnets. + // s.wg.Add(4) + // go s.handleChainNotifications() + // go s.rescanBatchHandler() + // go s.rescanProgressHandler() + // go s.rescanRPCHandler() +} + +// requirebtcClient marks that a vigilante method can only be completed when the +// consensus RPC server is set. This function and all functions that call it +// are unstable and will need to be moved when the syncing code is moved out of +// the vigilante. +func (s *Submitter) requireGetBtcClient() (*btcclient.Client, error) { + s.btcClientLock.Lock() + btcClient := s.btcClient + s.btcClientLock.Unlock() + if btcClient == nil { + return nil, errors.New("blockchain RPC is inactive") + } + return btcClient, nil +} + +// btcClient returns the optional consensus RPC client associated with the +// vigilante. +// +// This function is unstable and will be removed once sync logic is moved out of +// the vigilante. +func (s *Submitter) getBtcClient() *btcclient.Client { + s.btcClientLock.Lock() + btcClient := s.btcClient + s.btcClientLock.Unlock() + return btcClient +} + +// quitChan atomically reads the quit channel. +func (s *Submitter) quitChan() <-chan struct{} { + s.quitMu.Lock() + c := s.quit + s.quitMu.Unlock() + return c +} + +// Stop signals all vigilante goroutines to shutdown. +func (s *Submitter) Stop() { + s.quitMu.Lock() + quit := s.quit + s.quitMu.Unlock() + + select { + case <-quit: + default: + close(quit) + s.btcClientLock.Lock() + if s.btcClient != nil { + s.btcClient.Stop() + s.btcClient = nil + } + s.btcClientLock.Unlock() + } +} + +// ShuttingDown returns whether the vigilante is currently in the process of +// shutting down or not. +func (s *Submitter) ShuttingDown() bool { + select { + case <-s.quitChan(): + return true + default: + return false + } +} + +// WaitForShutdown blocks until all vigilante goroutines have finished executing. +func (s *Submitter) WaitForShutdown() { + s.btcClientLock.Lock() + if s.btcClient != nil { + s.btcClient.WaitForShutdown() + } + s.btcClientLock.Unlock() + s.wg.Wait() +}