multi: add signet params

With this commit we add the signet test network parameters to all switch
cases where we distinguish between the different networks.

chain/bitcoind_conn.go

@@ -484,6 +484,8 @@ func getCurrentNet(client *rpcclient.Client) (wire.BitcoinNet, error) {
 		return chaincfg.TestNet3Params.Net, nil
 	case *chaincfg.RegressionNetParams.GenesisHash:
 		return chaincfg.RegressionNetParams.Net, nil
+	case *chaincfg.SigNetParams.GenesisHash:
+		return chaincfg.SigNetParams.Net, nil
 	case *chaincfg.MainNetParams.GenesisHash:
 		return chaincfg.MainNetParams.Net, nil
 	default:

config.go

@@ -5,6 +5,7 @@
 package main
 
 import (
+	"encoding/hex"
 	"fmt"
 	"net"
 	"os"
@@ -15,6 +16,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcwallet/internal/cfgutil"
 	"github.com/btcsuite/btcwallet/internal/legacy/keystore"
@@ -52,6 +54,9 @@ type config struct {
 	AppDataDir      *cfgutil.ExplicitString `short:"A" long:"appdata" description:"Application data directory for wallet config, databases and logs"`
 	TestNet3        bool                    `long:"testnet" description:"Use the test Bitcoin network (version 3) (default mainnet)"`
 	SimNet          bool                    `long:"simnet" description:"Use the simulation test network (default mainnet)"`
+	SigNet          bool                    `long:"signet" description:"Use the signet test network (default mainnet)"`
+	SigNetChallenge string                  `long:"signetchallenge" description:"Connect to a custom signet network defined by this challenge instead of using the global default signet test network -- Can be specified multiple times"`
+	SigNetSeedNode  []string                `long:"signetseednode" description:"Specify a seed node for the signet network instead of using the global default signet network seed nodes"`
 	NoInitialLoad   bool                    `long:"noinitialload" description:"Defer wallet creation/opening on startup and enable loading wallets over RPC"`
 	DebugLevel      string                  `short:"d" long:"debuglevel" description:"Logging level {trace, debug, info, warn, error, critical}"`
 	LogDir          string                  `long:"logdir" description:"Directory to log output."`
@@ -365,9 +370,48 @@ func loadConfig() (*config, []string, error) {
 		activeNet = &netparams.SimNetParams
 		numNets++
 	}
+	if cfg.SigNet {
+		activeNet = &netparams.SigNetParams
+		numNets++
+
+		// Let the user overwrite the default signet parameters. The
+		// challenge defines the actual signet network to join and the
+		// seed nodes are needed for network discovery.
+		sigNetChallenge := chaincfg.DefaultSignetChallenge
+		sigNetSeeds := chaincfg.DefaultSignetDNSSeeds
+		if cfg.SigNetChallenge != "" {
+			challenge, err := hex.DecodeString(cfg.SigNetChallenge)
+			if err != nil {
+				str := "%s: Invalid signet challenge, hex " +
+					"decode failed: %v"
+				err := fmt.Errorf(str, funcName, err)
+				fmt.Fprintln(os.Stderr, err)
+				fmt.Fprintln(os.Stderr, usageMessage)
+				return nil, nil, err
+			}
+			sigNetChallenge = challenge
+		}
+
+		if len(cfg.SigNetSeedNode) > 0 {
+			sigNetSeeds = make(
+				[]chaincfg.DNSSeed, len(cfg.SigNetSeedNode),
+			)
+			for idx, seed := range cfg.SigNetSeedNode {
+				sigNetSeeds[idx] = chaincfg.DNSSeed{
+					Host:         seed,
+					HasFiltering: false,
+				}
+			}
+		}
+
+		chainParams := chaincfg.CustomSignetParams(
+			sigNetChallenge, sigNetSeeds,
+		)
+		activeNet.Params = &chainParams
+	}
 	if numNets > 1 {
-		str := "%s: The testnet and simnet params can't be used " +
-			"together -- choose one"
+		str := "%s: The testnet, signet and simnet params can't be " +
+			"used together -- choose one"
 		err := fmt.Errorf(str, "loadConfig")
 		fmt.Fprintln(os.Stderr, err)
 		parser.WriteHelp(os.Stderr)

internal/legacy/keystore/keystore.go

@@ -476,6 +476,11 @@ func (net *netParams) ReadFrom(r io.Reader) (int64, error) {
 		*net = (netParams)(chaincfg.TestNet3Params)
 	case wire.SimNet:
 		*net = (netParams)(chaincfg.SimNetParams)
+
+	// The legacy key store won't be compatible with custom signets, only
+	// the main public one.
+	case chaincfg.SigNetParams.Net:
+		*net = (netParams)(chaincfg.SigNetParams)
 	default:
 		return n64, errors.New("unknown network")
 	}

netparams/params.go

@@ -4,7 +4,10 @@
 
 package netparams
 
-import "github.com/btcsuite/btcd/chaincfg"
+import (
+	"github.com/btcsuite/btcd/chaincfg"
+	"github.com/btcsuite/btcd/wire"
+)
 
 // Params is used to group parameters for various networks such as the main
 // network and test networks.
@@ -37,3 +40,23 @@ var SimNetParams = Params{
 	RPCClientPort: "18556",
 	RPCServerPort: "18554",
 }
+
+// SigNetParams contains parameters specific to the signet test network
+// (wire.SigNet).
+var SigNetParams = Params{
+	Params:        &chaincfg.SigNetParams,
+	RPCClientPort: "38334",
+	RPCServerPort: "38332",
+}
+
+// SigNetWire is a helper function that either returns the given chain
+// parameter's net value if the parameter represents a signet network or 0 if
+// it's not. This is necessary because there can be custom signet networks that
+// have a different net value.
+func SigNetWire(params *chaincfg.Params) wire.BitcoinNet {
+	if params.Name == chaincfg.SigNetParams.Name {
+		return params.Net
+	}
+
+	return 0
+}

waddrmgr/migrations.go

@@ -322,6 +322,10 @@ func populateBirthdayBlock(ns walletdb.ReadWriteBucket) error {
 		genesisTimestamp =
 			chaincfg.SimNetParams.GenesisBlock.Header.Timestamp
 
+	case *chaincfg.SigNetParams.GenesisHash:
+		genesisTimestamp =
+			chaincfg.SigNetParams.GenesisBlock.Header.Timestamp
+
 	default:
 		return fmt.Errorf("unknown genesis hash %v", genesisHash)
 	}

waddrmgr/scoped_manager.go

@@ -12,6 +12,7 @@ import (
 	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcutil/hdkeychain"
 	"github.com/btcsuite/btcwallet/internal/zero"
+	"github.com/btcsuite/btcwallet/netparams"
 	"github.com/btcsuite/btcwallet/walletdb"
 )
 
@@ -2231,7 +2232,9 @@ func (s *ScopedKeyManager) cloneKeyWithVersion(key *hdkeychain.ExtendedKey) (
 			return nil, fmt.Errorf("unsupported scope %v", s.scope)
 		}
 
-	case wire.TestNet, wire.TestNet3:
+	case wire.TestNet, wire.TestNet3,
+		netparams.SigNetWire(s.rootManager.ChainParams()):
+
 		switch s.scope {
 		case KeyScopeBIP0044:
 			version = HDVersionTestNetBIP0044

wallet/import.go

@@ -9,6 +9,7 @@ import (
 	"github.com/btcsuite/btcd/wire"
 	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcutil/hdkeychain"
+	"github.com/btcsuite/btcwallet/netparams"
 	"github.com/btcsuite/btcwallet/waddrmgr"
 	"github.com/btcsuite/btcwallet/walletdb"
 )
@@ -108,7 +109,7 @@ func (w *Wallet) isPubKeyForNet(pubKey *hdkeychain.ExtendedKey) bool {
 			version == waddrmgr.HDVersionMainNetBIP0049 ||
 			version == waddrmgr.HDVersionMainNetBIP0084
 
-	case wire.TestNet, wire.TestNet3:
+	case wire.TestNet, wire.TestNet3, netparams.SigNetWire(w.chainParams):
 		return version == waddrmgr.HDVersionTestNetBIP0044 ||
 			version == waddrmgr.HDVersionTestNetBIP0049 ||
 			version == waddrmgr.HDVersionTestNetBIP0084