chainreg: add Config, move chainparams.go

Creates a Config that initializes the chainregistry struct in the
lnd package. Also moves all of chainparams.go to the chainreg
package.

chainreg/chainregistry.go

@@ -0,0 +1,78 @@
+package chainreg
+
+import (
+	"time"
+
+	"github.com/btcsuite/btcwallet/wallet"
+	"github.com/lightninglabs/neutrino"
+	"github.com/lightningnetwork/lnd/channeldb"
+	"github.com/lightningnetwork/lnd/lncfg"
+)
+
+// Config houses necessary fields that a chainControl instance needs to
+// function.
+type Config struct {
+	// Bitcoin defines settings for the Bitcoin chain.
+	Bitcoin *lncfg.Chain
+
+	// Litecoin defines settings for the Litecoin chain.
+	Litecoin *lncfg.Chain
+
+	// PrimaryChain is a function that returns our primary chain via its
+	// ChainCode.
+	PrimaryChain func() ChainCode
+
+	// HeightHintCacheQueryDisable is a boolean that disables height hint
+	// queries if true.
+	HeightHintCacheQueryDisable bool
+
+	// NeutrinoMode defines settings for connecting to a neutrino light-client.
+	NeutrinoMode *lncfg.Neutrino
+
+	// BitcoindMode defines settings for connecting to a bitcoind node.
+	BitcoindMode *lncfg.Bitcoind
+
+	// LitecoindMode defines settings for connecting to a litecoind node.
+	LitecoindMode *lncfg.Bitcoind
+
+	// BtcdMode defines settings for connecting to a btcd node.
+	BtcdMode *lncfg.Btcd
+
+	// LtcdMode defines settings for connecting to an ltcd node.
+	LtcdMode *lncfg.Btcd
+
+	// LocalChanDB is a pointer to the local backing channel database.
+	LocalChanDB *channeldb.DB
+
+	// RemoteChanDB is a pointer to the remote backing channel database.
+	RemoteChanDB *channeldb.DB
+
+	// PrivateWalletPw is the private wallet password to the underlying
+	// btcwallet instance.
+	PrivateWalletPw []byte
+
+	// PublicWalletPw is the public wallet password to the underlying btcwallet
+	// instance.
+	PublicWalletPw []byte
+
+	// Birthday specifies the time the wallet was initially created.
+	Birthday time.Time
+
+	// RecoveryWindow specifies the address look-ahead for which to scan when
+	// restoring a wallet.
+	RecoveryWindow uint32
+
+	// Wallet is a pointer to the backing wallet instance.
+	Wallet *wallet.Wallet
+
+	// NeutrinoCS is a pointer to a neutrino ChainService. Must be non-nil if
+	// using neutrino.
+	NeutrinoCS *neutrino.ChainService
+
+	// ActiveNetParams details the current chain we are on.
+	ActiveNetParams BitcoinNetParams
+
+	// FeeURL defines the URL for fee estimation we will use. This field is
+	// optional.
+	FeeURL string
+}