13866475355

Committed 14 Mar 2025 10:36PM UTC coverage: 68.606% (+10.3%) from 58.315%

Build # 13866475355

Build Type

Pull #9558

github

Committed by

web-flow

Commit Message

Merge 1ea70677f into 053d63e11

Pull Request Pull Request #9558: Fix input sanitation for listchaintxns lncli cmd

Run Details

18 of 25 new or added lines in 1 file covered. (72.0%)

22 existing lines in 4 files now uncovered.

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Source File
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8.28

/cmd/commands/commands.go

package commands

import (
        "bufio"
        "bytes"
        "context"
        "encoding/hex"
        "encoding/json"
        "errors"
        "fmt"
        "io"
        "math"
        "os"
        "regexp"
        "strconv"
        "strings"
        "sync"

        "github.com/btcsuite/btcd/chaincfg/chainhash"
        "github.com/btcsuite/btcd/wire"
        "github.com/jessevdk/go-flags"
        "github.com/lightningnetwork/lnd"
        "github.com/lightningnetwork/lnd/lnrpc"
        "github.com/lightningnetwork/lnd/lnwire"
        "github.com/lightningnetwork/lnd/routing"
        "github.com/lightningnetwork/lnd/routing/route"
        "github.com/lightningnetwork/lnd/signal"
        "github.com/urfave/cli"
        "golang.org/x/term"
        "google.golang.org/grpc/codes"
        "google.golang.org/grpc/status"
        "google.golang.org/protobuf/proto"
)

// TODO(roasbeef): cli logic for supporting both positional and unix style
// arguments.

// TODO(roasbeef): expose all fee conf targets

const defaultRecoveryWindow int32 = 2500

const (
        defaultUtxoMinConf = 1
)

var (
        errBadChanPoint = errors.New(
                "expecting chan_point to be in format of: txid:index",
        )

        customDataPattern = regexp.MustCompile(
                `"custom_channel_data":\s*"([0-9a-f]+)"`,
        )

        chanIDPattern = regexp.MustCompile(
                `"chan_id":\s*"(\d+)"`,
        )

        channelPointPattern = regexp.MustCompile(
                `"channel_point":\s*"([0-9a-fA-F]+:[0-9]+)"`,
        )
)

// replaceCustomData replaces the custom channel data hex string with the
// decoded custom channel data in the JSON response.
func replaceCustomData(jsonBytes []byte) []byte {
        // If there's nothing to replace, return the original JSON.
        if !customDataPattern.Match(jsonBytes) {
                return jsonBytes
        }

        replacedBytes := customDataPattern.ReplaceAllFunc(
                jsonBytes, func(match []byte) []byte {
                        encoded := customDataPattern.FindStringSubmatch(
                                string(match),
                        )[1]
                        decoded, err := hex.DecodeString(encoded)
                        if err != nil {
                                return match
                        }

                        return []byte("\"custom_channel_data\":" +
                                string(decoded))
                },
        )

        var buf bytes.Buffer
        err := json.Indent(&buf, replacedBytes, "", "    ")
        if err != nil {
                // If we can't indent the JSON, it likely means the replacement
                // data wasn't correct, so we return the original JSON.
                return jsonBytes
        }

        return buf.Bytes()
}

// replaceAndAppendScid replaces the chan_id with scid and appends the human
// readable string representation of scid.
func replaceAndAppendScid(jsonBytes []byte) []byte {
        // If there's nothing to replace, return the original JSON.
        if !chanIDPattern.Match(jsonBytes) {
                return jsonBytes
        }

        replacedBytes := chanIDPattern.ReplaceAllFunc(
                jsonBytes, func(match []byte) []byte {
                        // Extract the captured scid group from the match.
                        chanID := chanIDPattern.FindStringSubmatch(
                                string(match),
                        )[1]

                        scid, err := strconv.ParseUint(chanID, 10, 64)
                        if err != nil {
                                return match
                        }

                        // Format a new JSON field for the scid (chan_id),
                        // including both its numeric representation and its
                        // string representation (scid_str).
                        scidStr := lnwire.NewShortChanIDFromInt(scid).
                                AltString()
                        updatedField := fmt.Sprintf(
                                `"scid": "%d", "scid_str": "%s"`, scid, scidStr,
                        )

                        // Replace the entire match with the new structure.
                        return []byte(updatedField)
                },
        )

        var buf bytes.Buffer
        err := json.Indent(&buf, replacedBytes, "", "    ")
        if err != nil {
                // If we can't indent the JSON, it likely means the replacement
                // data wasn't correct, so we return the original JSON.
                return jsonBytes
        }

        return buf.Bytes()
}

// appendChanID appends the chan_id which is computed using the outpoint
// of the funding transaction (the txid, and output index).
func appendChanID(jsonBytes []byte) []byte {
        // If there's nothing to replace, return the original JSON.
        if !channelPointPattern.Match(jsonBytes) {
                return jsonBytes
        }

        replacedBytes := channelPointPattern.ReplaceAllFunc(
                jsonBytes, func(match []byte) []byte {
                        chanPoint := channelPointPattern.FindStringSubmatch(
                                string(match),
                        )[1]

                        chanOutpoint, err := wire.NewOutPointFromString(
                                chanPoint,
                        )
                        if err != nil {
                                return match
                        }

                        // Format a new JSON field computed from the
                        // channel_point (chan_id).
                        chanID := lnwire.NewChanIDFromOutPoint(*chanOutpoint)
                        updatedField := fmt.Sprintf(
                                `"channel_point": "%s", "chan_id": "%s"`,
                                chanPoint, chanID.String(),
                        )

                        // Replace the entire match with the new structure.
                        return []byte(updatedField)
                },
        )

        var buf bytes.Buffer
        err := json.Indent(&buf, replacedBytes, "", "    ")
        if err != nil {
                // If we can't indent the JSON, it likely means the replacement
                // data wasn't correct, so we return the original JSON.
                return jsonBytes
        }

        return buf.Bytes()
}

func getContext() context.Context {
        shutdownInterceptor, err := signal.Intercept()
        if err != nil {
                _, _ = fmt.Fprintln(os.Stderr, err)
                os.Exit(1)
        }

        ctxc, cancel := context.WithCancel(context.Background())
        go func() {
                <-shutdownInterceptor.ShutdownChannel()
                cancel()
        }()
        return ctxc
}

func printJSON(resp interface{}) {
        b, err := json.Marshal(resp)
        if err != nil {
                fatal(err)
        }

        var out bytes.Buffer
        _ = json.Indent(&out, b, "", "    ")
        _, _ = out.WriteString("\n")
        _, _ = out.WriteTo(os.Stdout)
}

// printRespJSON prints the response in a json format.
func printRespJSON(resp proto.Message) {
        jsonBytes, err := lnrpc.ProtoJSONMarshalOpts.Marshal(resp)
        if err != nil {
                fmt.Println("unable to decode response: ", err)
                return
        }

        // Make the custom data human readable.
        jsonBytesReplaced := replaceCustomData(jsonBytes)

        fmt.Printf("%s\n", jsonBytesReplaced)
}

// printModifiedProtoJSON prints the response with some additional formatting
// and replacements.
func printModifiedProtoJSON(resp proto.Message) {
        jsonBytes, err := lnrpc.ProtoJSONMarshalOpts.Marshal(resp)
        if err != nil {
                fmt.Println("unable to decode response: ", err)
                return
        }

        // Replace custom_channel_data in the JSON.
        jsonBytesReplaced := replaceCustomData(jsonBytes)

        // Replace chan_id with scid, and append scid_str and scid fields.
        jsonBytesReplaced = replaceAndAppendScid(jsonBytesReplaced)

        // Append the chan_id field to the JSON.
        jsonBytesReplaced = appendChanID(jsonBytesReplaced)

        fmt.Printf("%s\n", jsonBytesReplaced)
}

// actionDecorator is used to add additional information and error handling
// to command actions.
func actionDecorator(f func(*cli.Context) error) func(*cli.Context) error {
        return func(c *cli.Context) error {
                if err := f(c); err != nil {
                        s, ok := status.FromError(err)

                        // If it's a command for the UnlockerService (like
                        // 'create' or 'unlock') but the wallet is already
                        // unlocked, then these methods aren't recognized any
                        // more because this service is shut down after
                        // successful unlock. That's why the code
                        // 'Unimplemented' means something different for these
                        // two commands.
                        if s.Code() == codes.Unimplemented &&
                                (c.Command.Name == "create" ||
                                        c.Command.Name == "unlock" ||
                                        c.Command.Name == "changepassword" ||
                                        c.Command.Name == "createwatchonly") {

                                return fmt.Errorf("Wallet is already unlocked")
                        }

                        // lnd might be active, but not possible to contact
                        // using RPC if the wallet is encrypted. If we get
                        // error code Unimplemented, it means that lnd is
                        // running, but the RPC server is not active yet (only
                        // WalletUnlocker server active) and most likely this
                        // is because of an encrypted wallet.
                        if ok && s.Code() == codes.Unimplemented {
                                return fmt.Errorf("Wallet is encrypted. " +
                                        "Please unlock using 'lncli unlock', " +
                                        "or set password using 'lncli create'" +
                                        " if this is the first time starting " +
                                        "lnd.")
                        }
                        return err
                }
                return nil
        }
}

var newAddressCommand = cli.Command{
        Name:      "newaddress",
        Category:  "Wallet",
        Usage:     "Generates a new address.",
        ArgsUsage: "address-type",
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name: "account",
                        Usage: "(optional) the name of the account to " +
                                "generate a new address for",
                },
                cli.BoolFlag{
                        Name: "unused",
                        Usage: "(optional) return the last unused address " +
                                "instead of generating a new one",
                },
        },
        Description: `
        Generate a wallet new address. Address-types has to be one of:
            - p2wkh:  Pay to witness key hash
            - np2wkh: Pay to nested witness key hash
            - p2tr:   Pay to taproot pubkey`,
        Action: actionDecorator(newAddress),
}

func newAddress(ctx *cli.Context) error {
        ctxc := getContext()

        // Display the command's help message if we do not have the expected
        // number of arguments/flags.
        if ctx.NArg() != 1 || ctx.NumFlags() > 1 {
                return cli.ShowCommandHelp(ctx, "newaddress")
        }

        // Map the string encoded address type, to the concrete typed address
        // type enum. An unrecognized address type will result in an error.
        stringAddrType := ctx.Args().First()
        unused := ctx.Bool("unused")

        var addrType lnrpc.AddressType
        switch stringAddrType { // TODO(roasbeef): make them ints on the cli?
        case "p2wkh":
                addrType = lnrpc.AddressType_WITNESS_PUBKEY_HASH
                if unused {
                        addrType = lnrpc.AddressType_UNUSED_WITNESS_PUBKEY_HASH
                }
        case "np2wkh":
                addrType = lnrpc.AddressType_NESTED_PUBKEY_HASH
                if unused {
                        addrType = lnrpc.AddressType_UNUSED_NESTED_PUBKEY_HASH
                }
        case "p2tr":
                addrType = lnrpc.AddressType_TAPROOT_PUBKEY
                if unused {
                        addrType = lnrpc.AddressType_UNUSED_TAPROOT_PUBKEY
                }
        default:
                return fmt.Errorf("invalid address type %v, support address type "+
                        "are: p2wkh, np2wkh, and p2tr", stringAddrType)
        }

        client, cleanUp := getClient(ctx)
        defer cleanUp()

        addr, err := client.NewAddress(ctxc, &lnrpc.NewAddressRequest{
                Type:    addrType,
                Account: ctx.String("account"),
        })
        if err != nil {
                return err
        }

        printRespJSON(addr)
        return nil
}

var coinSelectionStrategyFlag = cli.StringFlag{
        Name: "coin_selection_strategy",
        Usage: "(optional) the strategy to use for selecting " +
                "coins. Possible values are 'largest', 'random', or " +
                "'global-config'. If either 'largest' or 'random' is " +
                "specified, it will override the globally configured " +
                "strategy in lnd.conf",
        Value: "global-config",
}

var estimateFeeCommand = cli.Command{
        Name:      "estimatefee",
        Category:  "On-chain",
        Usage:     "Get fee estimates for sending bitcoin on-chain to multiple addresses.",
        ArgsUsage: "send-json-string [--conf_target=N]",
        Description: `
        Get fee estimates for sending a transaction paying the specified amount(s) to the passed address(es).

        The send-json-string' param decodes addresses and the amount to send respectively in the following format:

            '{"ExampleAddr": NumCoinsInSatoshis, "SecondAddr": NumCoins}'
        `,
        Flags: []cli.Flag{
                cli.Int64Flag{
                        Name: "conf_target",
                        Usage: "(optional) the number of blocks that the " +
                                "transaction *should* confirm in",
                },
                coinSelectionStrategyFlag,
        },
        Action: actionDecorator(estimateFees),
}

func estimateFees(ctx *cli.Context) error {
        ctxc := getContext()
        var amountToAddr map[string]int64

        jsonMap := ctx.Args().First()
        if err := json.Unmarshal([]byte(jsonMap), &amountToAddr); err != nil {
                return err
        }

        coinSelectionStrategy, err := parseCoinSelectionStrategy(ctx)
        if err != nil {
                return err
        }

        client, cleanUp := getClient(ctx)
        defer cleanUp()

        resp, err := client.EstimateFee(ctxc, &lnrpc.EstimateFeeRequest{
                AddrToAmount:          amountToAddr,
                TargetConf:            int32(ctx.Int64("conf_target")),
                CoinSelectionStrategy: coinSelectionStrategy,
        })
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var txLabelFlag = cli.StringFlag{
        Name:  "label",
        Usage: "(optional) a label for the transaction",
}

var sendCoinsCommand = cli.Command{
        Name:      "sendcoins",
        Category:  "On-chain",
        Usage:     "Send bitcoin on-chain to an address.",
        ArgsUsage: "addr amt",
        Description: `
        Send amt coins in satoshis to the base58 or bech32 encoded bitcoin address addr.

        Fees used when sending the transaction can be specified via the --conf_target, or
        --sat_per_vbyte optional flags.

        Positional arguments and flags can be used interchangeably but not at the same time!
        `,
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name: "addr",
                        Usage: "the base58 or bech32 encoded bitcoin address to send coins " +
                                "to on-chain",
                },
                cli.BoolFlag{
                        Name: "sweepall",
                        Usage: "if set, then the amount field should be " +
                                "unset. This indicates that the wallet will " +
                                "attempt to sweep all outputs within the " +
                                "wallet or all funds in select utxos (when " +
                                "supplied) to the target address",
                },
                cli.Int64Flag{
                        Name:  "amt",
                        Usage: "the number of bitcoin denominated in satoshis to send",
                },
                cli.Int64Flag{
                        Name: "conf_target",
                        Usage: "(optional) the number of blocks that the " +
                                "transaction *should* confirm in, will be " +
                                "used for fee estimation",
                },
                cli.Int64Flag{
                        Name:   "sat_per_byte",
                        Usage:  "Deprecated, use sat_per_vbyte instead.",
                        Hidden: true,
                },
                cli.Int64Flag{
                        Name: "sat_per_vbyte",
                        Usage: "(optional) a manual fee expressed in " +
                                "sat/vbyte that should be used when crafting " +
                                "the transaction",
                },
                cli.Uint64Flag{
                        Name: "min_confs",
                        Usage: "(optional) the minimum number of confirmations " +
                                "each one of your outputs used for the transaction " +
                                "must satisfy",
                        Value: defaultUtxoMinConf,
                },
                cli.BoolFlag{
                        Name: "force, f",
                        Usage: "if set, the transaction will be broadcast " +
                                "without asking for confirmation; this is " +
                                "set to true by default if stdout is not a " +
                                "terminal avoid breaking existing shell " +
                                "scripts",
                },
                coinSelectionStrategyFlag,
                cli.StringSliceFlag{
                        Name: "utxo",
                        Usage: "a utxo specified as outpoint(tx:idx) which " +
                                "will be used as input for the transaction. " +
                                "This flag can be repeatedly used to specify " +
                                "multiple utxos as inputs. The selected " +
                                "utxos can either be entirely spent by " +
                                "specifying the sweepall flag or a specified " +
                                "amount can be spent in the utxos through " +
                                "the amt flag",
                },
                txLabelFlag,
        },
        Action: actionDecorator(sendCoins),
}

func sendCoins(ctx *cli.Context) error {
        var (
                addr      string
                amt       int64
                err       error
                outpoints []*lnrpc.OutPoint
        )
        ctxc := getContext()
        args := ctx.Args()

        if ctx.NArg() == 0 && ctx.NumFlags() == 0 {
                cli.ShowCommandHelp(ctx, "sendcoins")
                return nil
        }

        // Check that only the field sat_per_vbyte or the deprecated field
        // sat_per_byte is used.
        feeRateFlag, err := checkNotBothSet(
                ctx, "sat_per_vbyte", "sat_per_byte",
        )
        if err != nil {
                return err
        }

        // Only fee rate flag or conf_target should be set, not both.
        if _, err := checkNotBothSet(
                ctx, feeRateFlag, "conf_target",
        ); err != nil {
                return err
        }

        switch {
        case ctx.IsSet("addr"):
                addr = ctx.String("addr")
        case args.Present():
                addr = args.First()
                args = args.Tail()
        default:
                return fmt.Errorf("Address argument missing")
        }

        switch {
        case ctx.IsSet("amt"):
                amt = ctx.Int64("amt")
        case args.Present():
                amt, err = strconv.ParseInt(args.First(), 10, 64)
        case !ctx.Bool("sweepall"):
                return fmt.Errorf("Amount argument missing")
        }
        if err != nil {
                return fmt.Errorf("unable to decode amount: %w", err)
        }

        if amt != 0 && ctx.Bool("sweepall") {
                return fmt.Errorf("amount cannot be set if attempting to " +
                        "sweep all coins out of the wallet")
        }

        coinSelectionStrategy, err := parseCoinSelectionStrategy(ctx)
        if err != nil {
                return err
        }

        client, cleanUp := getClient(ctx)
        defer cleanUp()
        minConfs := int32(ctx.Uint64("min_confs"))

        // In case that the user has specified the sweepall flag, we'll
        // calculate the amount to send based on the current wallet balance.
        displayAmt := amt
        if ctx.Bool("sweepall") && !ctx.IsSet("utxo") {
                balanceResponse, err := client.WalletBalance(
                        ctxc, &lnrpc.WalletBalanceRequest{
                                MinConfs: minConfs,
                        },
                )
                if err != nil {
                        return fmt.Errorf("unable to retrieve wallet balance:"+
                                " %w", err)
                }
                displayAmt = balanceResponse.GetConfirmedBalance()
        }

        if ctx.IsSet("utxo") {
                utxos := ctx.StringSlice("utxo")

                outpoints, err = UtxosToOutpoints(utxos)
                if err != nil {
                        return fmt.Errorf("unable to decode utxos: %w", err)
                }

                if ctx.Bool("sweepall") {
                        displayAmt = 0
                        // If we're sweeping all funds of the utxos, we'll need
                        // to set the display amount to the total amount of the
                        // utxos.
                        unspents, err := client.ListUnspent(
                                ctxc, &lnrpc.ListUnspentRequest{
                                        MinConfs: 0,
                                        MaxConfs: math.MaxInt32,
                                },
                        )
                        if err != nil {
                                return err
                        }

                        for _, utxo := range outpoints {
                                for _, unspent := range unspents.Utxos {
                                        unspentUtxo := unspent.Outpoint
                                        if isSameOutpoint(utxo, unspentUtxo) {
                                                displayAmt += unspent.AmountSat
                                                break
                                        }
                                }
                        }
                }
        }

        // Ask for confirmation if we're on an actual terminal and the output is
        // not being redirected to another command. This prevents existing shell
        // scripts from breaking.
        if !ctx.Bool("force") && term.IsTerminal(int(os.Stdout.Fd())) {
                fmt.Printf("Amount: %d\n", displayAmt)
                fmt.Printf("Destination address: %v\n", addr)

                confirm := promptForConfirmation("Confirm payment (yes/no): ")
                if !confirm {
                        return nil
                }
        }

        req := &lnrpc.SendCoinsRequest{
                Addr:                  addr,
                Amount:                amt,
                TargetConf:            int32(ctx.Int64("conf_target")),
                SatPerVbyte:           ctx.Uint64(feeRateFlag),
                SendAll:               ctx.Bool("sweepall"),
                Label:                 ctx.String(txLabelFlag.Name),
                MinConfs:              minConfs,
                SpendUnconfirmed:      minConfs == 0,
                CoinSelectionStrategy: coinSelectionStrategy,
                Outpoints:             outpoints,
        }
        txid, err := client.SendCoins(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(txid)
        return nil
}

func isSameOutpoint(a, b *lnrpc.OutPoint) bool {
        return a.TxidStr == b.TxidStr && a.OutputIndex == b.OutputIndex
}

var listUnspentCommand = cli.Command{
        Name:      "listunspent",
        Category:  "On-chain",
        Usage:     "List utxos available for spending.",
        ArgsUsage: "[min-confs [max-confs]] [--unconfirmed_only]",
        Description: `
        For each spendable utxo currently in the wallet, with at least min_confs
        confirmations, and at most max_confs confirmations, lists the txid,
        index, amount, address, address type, scriptPubkey and number of
        confirmations.  Use --min_confs=0 to include unconfirmed coins. To list
        all coins with at least min_confs confirmations, omit the second
        argument or flag '--max_confs'. To list all confirmed and unconfirmed
        coins, no arguments are required. To see only unconfirmed coins, use
        '--unconfirmed_only' with '--min_confs' and '--max_confs' set to zero or
        not present.
        `,
        Flags: []cli.Flag{
                cli.Int64Flag{
                        Name:  "min_confs",
                        Usage: "the minimum number of confirmations for a utxo",
                },
                cli.Int64Flag{
                        Name:  "max_confs",
                        Usage: "the maximum number of confirmations for a utxo",
                },
                cli.BoolFlag{
                        Name: "unconfirmed_only",
                        Usage: "when min_confs and max_confs are zero, " +
                                "setting false implicitly overrides max_confs " +
                                "to be MaxInt32, otherwise max_confs remains " +
                                "zero. An error is returned if the value is " +
                                "true and both min_confs and max_confs are " +
                                "non-zero. (default: false)",
                },
        },
        Action: actionDecorator(listUnspent),
}

func listUnspent(ctx *cli.Context) error {
        var (
                minConfirms int64
                maxConfirms int64
                err         error
        )
        ctxc := getContext()
        args := ctx.Args()

        if ctx.IsSet("max_confs") && !ctx.IsSet("min_confs") {
                return fmt.Errorf("max_confs cannot be set without " +
                        "min_confs being set")
        }

        switch {
        case ctx.IsSet("min_confs"):
                minConfirms = ctx.Int64("min_confs")
        case args.Present():
                minConfirms, err = strconv.ParseInt(args.First(), 10, 64)
                if err != nil {
                        cli.ShowCommandHelp(ctx, "listunspent")
                        return nil
                }
                args = args.Tail()
        }

        switch {
        case ctx.IsSet("max_confs"):
                maxConfirms = ctx.Int64("max_confs")
        case args.Present():
                maxConfirms, err = strconv.ParseInt(args.First(), 10, 64)
                if err != nil {
                        cli.ShowCommandHelp(ctx, "listunspent")
                        return nil
                }
                args = args.Tail()
        }

        unconfirmedOnly := ctx.Bool("unconfirmed_only")

        // Force minConfirms and maxConfirms to be zero if unconfirmedOnly is
        // true.
        if unconfirmedOnly && (minConfirms != 0 || maxConfirms != 0) {
                cli.ShowCommandHelp(ctx, "listunspent")
                return nil
        }

        // When unconfirmedOnly is inactive, we will override maxConfirms to be
        // a MaxInt32 to return all confirmed and unconfirmed utxos.
        if maxConfirms == 0 && !unconfirmedOnly {
                maxConfirms = math.MaxInt32
        }

        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.ListUnspentRequest{
                MinConfs: int32(minConfirms),
                MaxConfs: int32(maxConfirms),
        }
        resp, err := client.ListUnspent(ctxc, req)
        if err != nil {
                return err
        }

        // Parse the response into the final json object that will be printed
        // to stdout. At the moment, this filters out the raw txid bytes from
        // each utxo's outpoint and only prints the txid string.
        var listUnspentResp = struct {
                Utxos []*Utxo `json:"utxos"`
        }{
                Utxos: make([]*Utxo, 0, len(resp.Utxos)),
        }
        for _, protoUtxo := range resp.Utxos {
                utxo := NewUtxoFromProto(protoUtxo)
                listUnspentResp.Utxos = append(listUnspentResp.Utxos, utxo)
        }

        printJSON(listUnspentResp)

        return nil
}

var sendManyCommand = cli.Command{
        Name:      "sendmany",
        Category:  "On-chain",
        Usage:     "Send bitcoin on-chain to multiple addresses.",
        ArgsUsage: "send-json-string [--conf_target=N] [--sat_per_vbyte=P]",
        Description: `
        Create and broadcast a transaction paying the specified amount(s) to the passed address(es).

        The send-json-string' param decodes addresses and the amount to send
        respectively in the following format:

            '{"ExampleAddr": NumCoinsInSatoshis, "SecondAddr": NumCoins}'
        `,
        Flags: []cli.Flag{
                cli.Int64Flag{
                        Name: "conf_target",
                        Usage: "(optional) the number of blocks that the transaction *should* " +
                                "confirm in, will be used for fee estimation",
                },
                cli.Int64Flag{
                        Name:   "sat_per_byte",
                        Usage:  "Deprecated, use sat_per_vbyte instead.",
                        Hidden: true,
                },
                cli.Int64Flag{
                        Name: "sat_per_vbyte",
                        Usage: "(optional) a manual fee expressed in " +
                                "sat/vbyte that should be used when crafting " +
                                "the transaction",
                },
                cli.Uint64Flag{
                        Name: "min_confs",
                        Usage: "(optional) the minimum number of confirmations " +
                                "each one of your outputs used for the transaction " +
                                "must satisfy",
                        Value: defaultUtxoMinConf,
                },
                coinSelectionStrategyFlag,
                txLabelFlag,
        },
        Action: actionDecorator(sendMany),
}

func sendMany(ctx *cli.Context) error {
        ctxc := getContext()
        var amountToAddr map[string]int64

        jsonMap := ctx.Args().First()
        if err := json.Unmarshal([]byte(jsonMap), &amountToAddr); err != nil {
                return err
        }

        // Check that only the field sat_per_vbyte or the deprecated field
        // sat_per_byte is used.
        feeRateFlag, err := checkNotBothSet(
                ctx, "sat_per_vbyte", "sat_per_byte",
        )
        if err != nil {
                return err
        }

        // Only fee rate flag or conf_target should be set, not both.
        if _, err := checkNotBothSet(
                ctx, feeRateFlag, "conf_target",
        ); err != nil {
                return err
        }

        coinSelectionStrategy, err := parseCoinSelectionStrategy(ctx)
        if err != nil {
                return err
        }

        client, cleanUp := getClient(ctx)
        defer cleanUp()

        minConfs := int32(ctx.Uint64("min_confs"))
        txid, err := client.SendMany(ctxc, &lnrpc.SendManyRequest{
                AddrToAmount:          amountToAddr,
                TargetConf:            int32(ctx.Int64("conf_target")),
                SatPerVbyte:           ctx.Uint64(feeRateFlag),
                Label:                 ctx.String(txLabelFlag.Name),
                MinConfs:              minConfs,
                SpendUnconfirmed:      minConfs == 0,
                CoinSelectionStrategy: coinSelectionStrategy,
        })
        if err != nil {
                return err
        }

        printRespJSON(txid)
        return nil
}

var connectCommand = cli.Command{
        Name:      "connect",
        Category:  "Peers",
        Usage:     "Connect to a remote lightning peer.",
        ArgsUsage: "<pubkey>@host",
        Description: `
        Connect to a peer using its <pubkey> and host.

        A custom timeout on the connection is supported. For instance, to timeout
        the connection request in 30 seconds, use the following:

        lncli connect <pubkey>@host --timeout 30s
        `,
        Flags: []cli.Flag{
                cli.BoolFlag{
                        Name: "perm",
                        Usage: "If set, the daemon will attempt to persistently " +
                                "connect to the target peer.\n" +
                                "           If not, the call will be synchronous.",
                },
                cli.DurationFlag{
                        Name: "timeout",
                        Usage: "The connection timeout value for current request. " +
                                "Valid uints are {ms, s, m, h}.\n" +
                                "If not set, the global connection " +
                                "timeout value (default to 120s) is used.",
                },
        },
        Action: actionDecorator(connectPeer),
}

func connectPeer(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        targetAddress := ctx.Args().First()
        splitAddr := strings.Split(targetAddress, "@")
        if len(splitAddr) != 2 {
                return fmt.Errorf("target address expected in format: " +
                        "pubkey@host:port")
        }

        addr := &lnrpc.LightningAddress{
                Pubkey: splitAddr[0],
                Host:   splitAddr[1],
        }
        req := &lnrpc.ConnectPeerRequest{
                Addr:    addr,
                Perm:    ctx.Bool("perm"),
                Timeout: uint64(ctx.Duration("timeout").Seconds()),
        }

        lnid, err := client.ConnectPeer(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(lnid)
        return nil
}

var disconnectCommand = cli.Command{
        Name:     "disconnect",
        Category: "Peers",
        Usage: "Disconnect a remote lightning peer identified by " +
                "public key.",
        ArgsUsage: "<pubkey>",
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name: "node_key",
                        Usage: "The hex-encoded compressed public key of the peer " +
                                "to disconnect from",
                },
        },
        Action: actionDecorator(disconnectPeer),
}

func disconnectPeer(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        var pubKey string
        switch {
        case ctx.IsSet("node_key"):
                pubKey = ctx.String("node_key")
        case ctx.Args().Present():
                pubKey = ctx.Args().First()
        default:
                return fmt.Errorf("must specify target public key")
        }

        req := &lnrpc.DisconnectPeerRequest{
                PubKey: pubKey,
        }

        lnid, err := client.DisconnectPeer(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(lnid)
        return nil
}

// TODO(roasbeef): also allow short relative channel ID.

var closeChannelCommand = cli.Command{
        Name:     "closechannel",
        Category: "Channels",
        Usage:    "Close an existing channel.",
        Description: `
        Close an existing channel. The channel can be closed either cooperatively,
        or unilaterally (--force).

        A unilateral channel closure means that the latest commitment
        transaction will be broadcast to the network. As a result, any settled
        funds will be time locked for a few blocks before they can be spent.

        In the case of a cooperative closure, one can manually set the fee to
        be used for the closing transaction via either the --conf_target or
        --sat_per_vbyte arguments. This will be the starting value used during
        fee negotiation. This is optional. The parameter --max_fee_rate in
        comparison is the end boundary of the fee negotiation, if not specified
        it's always x3 of the starting value. Increasing this value increases
        the chance of a successful negotiation.
        Moreover if the channel has active HTLCs on it, the coop close will
        wait until all HTLCs are resolved and will not allow any new HTLCs on
        the channel. The channel will appear as disabled in the listchannels
        output. The command will block in that case until the channel close tx
        is broadcasted.

        In the case of a cooperative closure, one can manually set the address
        to deliver funds to upon closure. This is optional, and may only be used
        if an upfront shutdown address has not already been set. If neither are
        set the funds will be delivered to a new wallet address.

        To view which funding_txids/output_indexes can be used for a channel close,
        see the channel_point values within the listchannels command output.
        The format for a channel_point is 'funding_txid:output_index'.`,
        ArgsUsage: "funding_txid output_index",
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name:  "funding_txid",
                        Usage: "the txid of the channel's funding transaction",
                },
                cli.IntFlag{
                        Name: "output_index",
                        Usage: "the output index for the funding output of the funding " +
                                "transaction",
                },
                cli.StringFlag{
                        Name: "chan_point",
                        Usage: "(optional) the channel point. If set, " +
                                "funding_txid and output_index flags and " +
                                "positional arguments will be ignored",
                },
                cli.BoolFlag{
                        Name:  "force",
                        Usage: "attempt an uncooperative closure",
                },
                cli.BoolFlag{
                        Name: "block",
                        Usage: `block will wait for the channel to be closed,
                        "meaning that it will wait for the channel close tx to
                        get 1 confirmation.`,
                },
                cli.Int64Flag{
                        Name: "conf_target",
                        Usage: "(optional) the number of blocks that the " +
                                "transaction *should* confirm in, will be " +
                                "used for fee estimation. If not set, " +
                                "then the conf-target value set in the main " +
                                "lnd config will be used.",
                },
                cli.Int64Flag{
                        Name:   "sat_per_byte",
                        Usage:  "Deprecated, use sat_per_vbyte instead.",
                        Hidden: true,
                },
                cli.Int64Flag{
                        Name: "sat_per_vbyte",
                        Usage: "(optional) a manual fee expressed in " +
                                "sat/vbyte that should be used when crafting " +
                                "the transaction; default is a conf-target " +
                                "of 6 blocks",
                },
                cli.StringFlag{
                        Name: "delivery_addr",
                        Usage: "(optional) an address to deliver funds " +
                                "upon cooperative channel closing, may only " +
                                "be used if an upfront shutdown address is not " +
                                "already set",
                },
                cli.Uint64Flag{
                        Name: "max_fee_rate",
                        Usage: "(optional) maximum fee rate in sat/vbyte " +
                                "accepted during the negotiation (default is " +
                                "x3 of the desired fee rate); increases the " +
                                "success pobability of the negotiation if " +
                                "set higher",
                },
        },
        Action: actionDecorator(closeChannel),
}

func closeChannel(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        // Show command help if no arguments and flags were provided.
        if ctx.NArg() == 0 && ctx.NumFlags() == 0 {
                cli.ShowCommandHelp(ctx, "closechannel")
                return nil
        }

        // Check that only the field sat_per_vbyte or the deprecated field
        // sat_per_byte is used.
        feeRateFlag, err := checkNotBothSet(
                ctx, "sat_per_vbyte", "sat_per_byte",
        )
        if err != nil {
                return err
        }

        channelPoint, err := parseChannelPoint(ctx)
        if err != nil {
                return err
        }

        // TODO(roasbeef): implement time deadline within server
        req := &lnrpc.CloseChannelRequest{
                ChannelPoint:    channelPoint,
                Force:           ctx.Bool("force"),
                TargetConf:      int32(ctx.Int64("conf_target")),
                SatPerVbyte:     ctx.Uint64(feeRateFlag),
                DeliveryAddress: ctx.String("delivery_addr"),
                MaxFeePerVbyte:  ctx.Uint64("max_fee_rate"),
                // This makes sure that a coop close will also be executed if
                // active HTLCs are present on the channel.
                NoWait: true,
        }

        // After parsing the request, we'll spin up a goroutine that will
        // retrieve the closing transaction ID when attempting to close the
        // channel. We do this to because `executeChannelClose` can block, so we
        // would like to present the closing transaction ID to the user as soon
        // as it is broadcasted.
        var wg sync.WaitGroup
        txidChan := make(chan string, 1)

        wg.Add(1)
        go func() {
                defer wg.Done()

                printJSON(struct {
                        ClosingTxid string `json:"closing_txid"`
                }{
                        ClosingTxid: <-txidChan,
                })
        }()

        err = executeChannelClose(ctxc, client, req, txidChan, ctx.Bool("block"))
        if err != nil {
                return err
        }

        // In the case that the user did not provide the `block` flag, then we
        // need to wait for the goroutine to be done to prevent it from being
        // destroyed when exiting before printing the closing transaction ID.
        wg.Wait()

        return nil
}

// executeChannelClose attempts to close the channel from a request. The closing
// transaction ID is sent through `txidChan` as soon as it is broadcasted to the
// network. The block boolean is used to determine if we should block until the
// closing transaction receives a confirmation of 1 block. The logging outputs
// are sent to stderr to avoid conflicts with the JSON output of the command
// and potential work flows which depend on a proper JSON output.
func executeChannelClose(ctxc context.Context, client lnrpc.LightningClient,
        req *lnrpc.CloseChannelRequest, txidChan chan<- string, block bool) error {

        stream, err := client.CloseChannel(ctxc, req)
        if err != nil {
                return err
        }

        for {
                resp, err := stream.Recv()
                if err == io.EOF {
                        return nil
                } else if err != nil {
                        return err
                }

                switch update := resp.Update.(type) {
                case *lnrpc.CloseStatusUpdate_CloseInstant:
                        fmt.Fprintln(os.Stderr, "Channel close successfully "+
                                "initiated")

                        pendingHtlcs := update.CloseInstant.NumPendingHtlcs
                        if pendingHtlcs > 0 {
                                fmt.Fprintf(os.Stderr, "Cooperative channel "+
                                        "close waiting for %d HTLCs to be "+
                                        "resolved before the close process "+
                                        "can kick off\n", pendingHtlcs)
                        }

                case *lnrpc.CloseStatusUpdate_ClosePending:
                        closingHash := update.ClosePending.Txid
                        txid, err := chainhash.NewHash(closingHash)
                        if err != nil {
                                return err
                        }

                        fmt.Fprintf(os.Stderr, "Channel close transaction "+
                                "broadcasted: %v\n", txid)

                        txidChan <- txid.String()

                        if !block {
                                return nil
                        }

                        fmt.Fprintln(os.Stderr, "Waiting for channel close "+
                                "confirmation ...")

                case *lnrpc.CloseStatusUpdate_ChanClose:
                        fmt.Fprintln(os.Stderr, "Channel close successfully "+
                                "confirmed")

                        return nil
                }
        }
}

var closeAllChannelsCommand = cli.Command{
        Name:     "closeallchannels",
        Category: "Channels",
        Usage:    "Close all existing channels.",
        Description: `
        Close all existing channels.

        Channels will be closed either cooperatively or unilaterally, depending
        on whether the channel is active or not. If the channel is inactive, any
        settled funds within it will be time locked for a few blocks before they
        can be spent.

        One can request to close inactive channels only by using the
        --inactive_only flag.

        By default, one is prompted for confirmation every time an inactive
        channel is requested to be closed. To avoid this, one can set the
        --force flag, which will only prompt for confirmation once for all
        inactive channels and proceed to close them.

        In the case of cooperative closures, one can manually set the fee to
        be used for the closing transactions via either the --conf_target or
        --sat_per_vbyte arguments. This will be the starting value used during
        fee negotiation. This is optional.`,
        Flags: []cli.Flag{
                cli.BoolFlag{
                        Name:  "inactive_only",
                        Usage: "close inactive channels only",
                },
                cli.BoolFlag{
                        Name: "force",
                        Usage: "ask for confirmation once before attempting " +
                                "to close existing channels",
                },
                cli.Int64Flag{
                        Name: "conf_target",
                        Usage: "(optional) the number of blocks that the " +
                                "closing transactions *should* confirm in, will be " +
                                "used for fee estimation",
                },
                cli.Int64Flag{
                        Name:   "sat_per_byte",
                        Usage:  "Deprecated, use sat_per_vbyte instead.",
                        Hidden: true,
                },
                cli.Int64Flag{
                        Name: "sat_per_vbyte",
                        Usage: "(optional) a manual fee expressed in " +
                                "sat/vbyte that should be used when crafting " +
                                "the closing transactions",
                },
                cli.BoolFlag{
                        Name: "s, skip_confirmation",
                        Usage: "Skip the confirmation prompt and close all " +
                                "channels immediately",
                },
        },
        Action: actionDecorator(closeAllChannels),
}

func closeAllChannels(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        // Check that only the field sat_per_vbyte or the deprecated field
        // sat_per_byte is used.
        feeRateFlag, err := checkNotBothSet(
                ctx, "sat_per_vbyte", "sat_per_byte",
        )
        if err != nil {
                return err
        }

        prompt := "Do you really want to close ALL channels? (yes/no): "
        if !ctx.Bool("skip_confirmation") && !promptForConfirmation(prompt) {
                return errors.New("action aborted by user")
        }

        listReq := &lnrpc.ListChannelsRequest{}
        openChannels, err := client.ListChannels(ctxc, listReq)
        if err != nil {
                return fmt.Errorf("unable to fetch open channels: %w", err)
        }

        if len(openChannels.Channels) == 0 {
                return errors.New("no open channels to close")
        }

        var channelsToClose []*lnrpc.Channel

        switch {
        case ctx.Bool("force") && ctx.Bool("inactive_only"):
                msg := "Unilaterally close all inactive channels? The funds " +
                        "within these channels will be locked for some blocks " +
                        "(CSV delay) before they can be spent. (yes/no): "

                confirmed := promptForConfirmation(msg)

                // We can safely exit if the user did not confirm.
                if !confirmed {
                        return nil
                }

                // Go through the list of open channels and only add inactive
                // channels to the closing list.
                for _, channel := range openChannels.Channels {
                        if !channel.GetActive() {
                                channelsToClose = append(
                                        channelsToClose, channel,
                                )
                        }
                }
        case ctx.Bool("force"):
                msg := "Close all active and inactive channels? Inactive " +
                        "channels will be closed unilaterally, so funds " +
                        "within them will be locked for a few blocks (CSV " +
                        "delay) before they can be spent. (yes/no): "

                confirmed := promptForConfirmation(msg)

                // We can safely exit if the user did not confirm.
                if !confirmed {
                        return nil
                }

                channelsToClose = openChannels.Channels
        default:
                // Go through the list of open channels and determine which
                // should be added to the closing list.
                for _, channel := range openChannels.Channels {
                        // If the channel is inactive, we'll attempt to
                        // unilaterally close the channel, so we should prompt
                        // the user for confirmation beforehand.
                        if !channel.GetActive() {
                                msg := fmt.Sprintf("Unilaterally close channel "+
                                        "with node %s and channel point %s? "+
                                        "The closing transaction will need %d "+
                                        "confirmations before the funds can be "+
                                        "spent. (yes/no): ", channel.RemotePubkey,
                                        channel.ChannelPoint, channel.LocalConstraints.CsvDelay)

                                confirmed := promptForConfirmation(msg)

                                if confirmed {
                                        channelsToClose = append(
                                                channelsToClose, channel,
                                        )
                                }
                        } else if !ctx.Bool("inactive_only") {
                                // Otherwise, we'll only add active channels if
                                // we were not requested to close inactive
                                // channels only.
                                channelsToClose = append(
                                        channelsToClose, channel,
                                )
                        }
                }
        }

        // result defines the result of closing a channel. The closing
        // transaction ID is populated if a channel is successfully closed.
        // Otherwise, the error that prevented closing the channel is populated.
        type result struct {
                RemotePubKey string `json:"remote_pub_key"`
                ChannelPoint string `json:"channel_point"`
                ClosingTxid  string `json:"closing_txid"`
                FailErr      string `json:"error"`
        }

        // Launch each channel closure in a goroutine in order to execute them
        // in parallel. Once they're all executed, we will print the results as
        // they come.
        resultChan := make(chan result, len(channelsToClose))
        for _, channel := range channelsToClose {
                go func(channel *lnrpc.Channel) {
                        res := result{}
                        res.RemotePubKey = channel.RemotePubkey
                        res.ChannelPoint = channel.ChannelPoint
                        defer func() {
                                resultChan <- res
                        }()

                        // Parse the channel point in order to create the close
                        // channel request.
                        s := strings.Split(res.ChannelPoint, ":")
                        if len(s) != 2 {
                                res.FailErr = "expected channel point with " +
                                        "format txid:index"
                                return
                        }
                        index, err := strconv.ParseUint(s[1], 10, 32)
                        if err != nil {
                                res.FailErr = fmt.Sprintf("unable to parse "+
                                        "channel point output index: %v", err)
                                return
                        }

                        req := &lnrpc.CloseChannelRequest{
                                ChannelPoint: &lnrpc.ChannelPoint{
                                        FundingTxid: &lnrpc.ChannelPoint_FundingTxidStr{
                                                FundingTxidStr: s[0],
                                        },
                                        OutputIndex: uint32(index),
                                },
                                Force:       !channel.GetActive(),
                                TargetConf:  int32(ctx.Int64("conf_target")),
                                SatPerVbyte: ctx.Uint64(feeRateFlag),
                        }

                        txidChan := make(chan string, 1)
                        err = executeChannelClose(ctxc, client, req, txidChan, false)
                        if err != nil {
                                res.FailErr = fmt.Sprintf("unable to close "+
                                        "channel: %v", err)
                                return
                        }

                        res.ClosingTxid = <-txidChan
                }(channel)
        }

        for range channelsToClose {
                res := <-resultChan
                printJSON(res)
        }

        return nil
}

// promptForConfirmation continuously prompts the user for the message until
// receiving a response of "yes" or "no" and returns their answer as a bool.
func promptForConfirmation(msg string) bool {
        reader := bufio.NewReader(os.Stdin)

        for {
                fmt.Print(msg)

                answer, err := reader.ReadString('\n')
                if err != nil {
                        return false
                }

                answer = strings.ToLower(strings.TrimSpace(answer))

                switch {
                case answer == "yes":
                        return true
                case answer == "no":
                        return false
                default:
                        continue
                }
        }
}

var abandonChannelCommand = cli.Command{
        Name:     "abandonchannel",
        Category: "Channels",
        Usage:    "Abandons an existing channel.",
        Description: `
        Removes all channel state from the database except for a close
        summary. This method can be used to get rid of permanently unusable
        channels due to bugs fixed in newer versions of lnd.

        Only available when lnd is built in debug mode. The flag
        --i_know_what_i_am_doing can be set to override the debug/dev mode
        requirement.

        To view which funding_txids/output_indexes can be used for this command,
        see the channel_point values within the listchannels command output.
        The format for a channel_point is 'funding_txid:output_index'.`,
        ArgsUsage: "funding_txid [output_index]",
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name:  "funding_txid",
                        Usage: "the txid of the channel's funding transaction",
                },
                cli.IntFlag{
                        Name: "output_index",
                        Usage: "the output index for the funding output of the funding " +
                                "transaction",
                },
                cli.StringFlag{
                        Name: "chan_point",
                        Usage: "(optional) the channel point. If set, " +
                                "funding_txid and output_index flags and " +
                                "positional arguments will be ignored",
                },
                cli.BoolFlag{
                        Name: "i_know_what_i_am_doing",
                        Usage: "override the requirement for lnd needing to " +
                                "be in dev/debug mode to use this command; " +
                                "when setting this the user attests that " +
                                "they know the danger of using this command " +
                                "on channels and that doing so can lead to " +
                                "loss of funds if the channel funding TX " +
                                "ever confirms (or was confirmed)",
                },
        },
        Action: actionDecorator(abandonChannel),
}

func abandonChannel(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        // Show command help if no arguments and flags were provided.
        if ctx.NArg() == 0 && ctx.NumFlags() == 0 {
                cli.ShowCommandHelp(ctx, "abandonchannel")
                return nil
        }

        channelPoint, err := parseChannelPoint(ctx)
        if err != nil {
                return err
        }

        req := &lnrpc.AbandonChannelRequest{
                ChannelPoint:      channelPoint,
                IKnowWhatIAmDoing: ctx.Bool("i_know_what_i_am_doing"),
        }

        resp, err := client.AbandonChannel(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

// parseChannelPoint parses a funding txid and output index from the command
// line. Both named options and unnamed parameters are supported.
func parseChannelPoint(ctx *cli.Context) (*lnrpc.ChannelPoint, error) {
        channelPoint := &lnrpc.ChannelPoint{}
        var err error

        args := ctx.Args()

        switch {
        case ctx.IsSet("chan_point"):
                channelPoint, err = parseChanPoint(ctx.String("chan_point"))
                if err != nil {
                        return nil, fmt.Errorf("unable to parse chan_point: "+
                                "%v", err)
                }
                return channelPoint, nil

        case ctx.IsSet("funding_txid"):
                channelPoint.FundingTxid = &lnrpc.ChannelPoint_FundingTxidStr{
                        FundingTxidStr: ctx.String("funding_txid"),
                }
        case args.Present():
                channelPoint.FundingTxid = &lnrpc.ChannelPoint_FundingTxidStr{
                        FundingTxidStr: args.First(),
                }
                args = args.Tail()
        default:
                return nil, fmt.Errorf("funding txid argument missing")
        }

        switch {
        case ctx.IsSet("output_index"):
                channelPoint.OutputIndex = uint32(ctx.Int("output_index"))
        case args.Present():
                index, err := strconv.ParseUint(args.First(), 10, 32)
                if err != nil {
                        return nil, fmt.Errorf("unable to decode output "+
                                "index: %w", err)
                }
                channelPoint.OutputIndex = uint32(index)
        default:
                channelPoint.OutputIndex = 0
        }

        return channelPoint, nil
}

var listPeersCommand = cli.Command{
        Name:     "listpeers",
        Category: "Peers",
        Usage:    "List all active, currently connected peers.",
        Flags: []cli.Flag{
                cli.BoolFlag{
                        Name:  "list_errors",
                        Usage: "list a full set of most recent errors for the peer",
                },
        },
        Action: actionDecorator(listPeers),
}

func listPeers(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        // By default, we display a single error on the cli. If the user
        // specifically requests a full error set, then we will provide it.
        req := &lnrpc.ListPeersRequest{
                LatestError: !ctx.IsSet("list_errors"),
        }
        resp, err := client.ListPeers(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var walletBalanceCommand = cli.Command{
        Name:     "walletbalance",
        Category: "Wallet",
        Usage:    "Compute and display the wallet's current balance.",
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name: "account",
                        Usage: "(optional) the account for which the balance " +
                                "is shown",
                        Value: "",
                },
        },
        Action: actionDecorator(walletBalance),
}

func walletBalance(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.WalletBalanceRequest{
                Account: ctx.String("account"),
        }
        resp, err := client.WalletBalance(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var ChannelBalanceCommand = cli.Command{
        Name:     "channelbalance",
        Category: "Channels",
        Usage: "Returns the sum of the total available channel balance across " +
                "all open channels.",
        Action: actionDecorator(ChannelBalance),
}

func ChannelBalance(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.ChannelBalanceRequest{}
        resp, err := client.ChannelBalance(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var generateManPageCommand = cli.Command{
        Name: "generatemanpage",
        Usage: "Generates a man page for lncli and lnd as " +
                "lncli.1 and lnd.1 respectively.",
        Hidden: true,
        Action: actionDecorator(generateManPage),
}

func generateManPage(ctx *cli.Context) error {
        // Generate the man pages for lncli as lncli.1.
        manpages, err := ctx.App.ToMan()
        if err != nil {
                return err
        }
        err = os.WriteFile("lncli.1", []byte(manpages), 0644)
        if err != nil {
                return err
        }

        // Generate the man pages for lnd as lnd.1.
        config := lnd.DefaultConfig()
        fileParser := flags.NewParser(&config, flags.Default)
        fileParser.Name = "lnd"

        var buf bytes.Buffer
        fileParser.WriteManPage(&buf)

        err = os.WriteFile("lnd.1", buf.Bytes(), 0644)
        if err != nil {
                return err
        }

        return nil
}

var getInfoCommand = cli.Command{
        Name:   "getinfo",
        Usage:  "Returns basic information related to the active daemon.",
        Action: actionDecorator(getInfo),
}

func getInfo(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.GetInfoRequest{}
        resp, err := client.GetInfo(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var getRecoveryInfoCommand = cli.Command{
        Name:   "getrecoveryinfo",
        Usage:  "Display information about an ongoing recovery attempt.",
        Action: actionDecorator(getRecoveryInfo),
}

func getRecoveryInfo(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.GetRecoveryInfoRequest{}
        resp, err := client.GetRecoveryInfo(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var pendingChannelsCommand = cli.Command{
        Name:     "pendingchannels",
        Category: "Channels",
        Usage:    "Display information pertaining to pending channels.",
        Flags: []cli.Flag{
                cli.BoolFlag{
                        Name: "include_raw_tx",
                        Usage: "include the raw transaction hex for " +
                                "waiting_close_channels.",
                },
        },
        Action: actionDecorator(pendingChannels),
}

func pendingChannels(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        includeRawTx := ctx.Bool("include_raw_tx")
        req := &lnrpc.PendingChannelsRequest{
                IncludeRawTx: includeRawTx,
        }
        resp, err := client.PendingChannels(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)

        return nil
}

var ListChannelsCommand = cli.Command{
        Name:     "listchannels",
        Category: "Channels",
        Usage:    "List all open channels.",
        Flags: []cli.Flag{
                cli.BoolFlag{
                        Name:  "active_only",
                        Usage: "only list channels which are currently active",
                },
                cli.BoolFlag{
                        Name:  "inactive_only",
                        Usage: "only list channels which are currently inactive",
                },
                cli.BoolFlag{
                        Name:  "public_only",
                        Usage: "only list channels which are currently public",
                },
                cli.BoolFlag{
                        Name:  "private_only",
                        Usage: "only list channels which are currently private",
                },
                cli.StringFlag{
                        Name: "peer",
                        Usage: "(optional) only display channels with a " +
                                "particular peer, accepts 66-byte, " +
                                "hex-encoded pubkeys",
                },
                cli.BoolFlag{
                        Name: "skip_peer_alias_lookup",
                        Usage: "skip the peer alias lookup per channel in " +
                                "order to improve performance",
                },
        },
        Action: actionDecorator(ListChannels),
}

var listAliasesCommand = cli.Command{
        Name:     "listaliases",
        Category: "Channels",
        Usage:    "List all aliases.",
        Flags:    []cli.Flag{},
        Action:   actionDecorator(listAliases),
}

func listAliases(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.ListAliasesRequest{}

        resp, err := client.ListAliases(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)

        return nil
}

func ListChannels(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        peer := ctx.String("peer")

        // If the user requested channels with a particular key, parse the
        // provided pubkey.
        var peerKey []byte
        if len(peer) > 0 {
                pk, err := route.NewVertexFromStr(peer)
                if err != nil {
                        return fmt.Errorf("invalid --peer pubkey: %w", err)
                }

                peerKey = pk[:]
        }

        // By default, we will look up the peers' alias information unless the
        // skip_peer_alias_lookup flag indicates otherwise.
        lookupPeerAlias := !ctx.Bool("skip_peer_alias_lookup")

        req := &lnrpc.ListChannelsRequest{
                ActiveOnly:      ctx.Bool("active_only"),
                InactiveOnly:    ctx.Bool("inactive_only"),
                PublicOnly:      ctx.Bool("public_only"),
                PrivateOnly:     ctx.Bool("private_only"),
                Peer:            peerKey,
                PeerAliasLookup: lookupPeerAlias,
        }

        resp, err := client.ListChannels(ctxc, req)
        if err != nil {
                return err
        }

        printModifiedProtoJSON(resp)

        return nil
}

var closedChannelsCommand = cli.Command{
        Name:     "closedchannels",
        Category: "Channels",
        Usage:    "List all closed channels.",
        Flags: []cli.Flag{
                cli.BoolFlag{
                        Name:  "cooperative",
                        Usage: "list channels that were closed cooperatively",
                },
                cli.BoolFlag{
                        Name: "local_force",
                        Usage: "list channels that were force-closed " +
                                "by the local node",
                },
                cli.BoolFlag{
                        Name: "remote_force",
                        Usage: "list channels that were force-closed " +
                                "by the remote node",
                },
                cli.BoolFlag{
                        Name: "breach",
                        Usage: "list channels for which the remote node " +
                                "attempted to broadcast a prior " +
                                "revoked channel state",
                },
                cli.BoolFlag{
                        Name:  "funding_canceled",
                        Usage: "list channels that were never fully opened",
                },
                cli.BoolFlag{
                        Name: "abandoned",
                        Usage: "list channels that were abandoned by " +
                                "the local node",
                },
        },
        Action: actionDecorator(closedChannels),
}

func closedChannels(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.ClosedChannelsRequest{
                Cooperative:     ctx.Bool("cooperative"),
                LocalForce:      ctx.Bool("local_force"),
                RemoteForce:     ctx.Bool("remote_force"),
                Breach:          ctx.Bool("breach"),
                FundingCanceled: ctx.Bool("funding_canceled"),
                Abandoned:       ctx.Bool("abandoned"),
        }

        resp, err := client.ClosedChannels(ctxc, req)
        if err != nil {
                return err
        }

        printModifiedProtoJSON(resp)

        return nil
}

var describeGraphCommand = cli.Command{
        Name:     "describegraph",
        Category: "Graph",
        Description: "Prints a human readable version of the known channel " +
                "graph from the PoV of the node",
        Usage: "Describe the network graph.",
        Flags: []cli.Flag{
                cli.BoolFlag{
                        Name: "include_unannounced",
                        Usage: "If set, unannounced channels will be included in the " +
                                "graph. Unannounced channels are both private channels, and " +
                                "public channels that are not yet announced to the network.",
                },
        },
        Action: actionDecorator(describeGraph),
}

func describeGraph(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.ChannelGraphRequest{
                IncludeUnannounced: ctx.Bool("include_unannounced"),
        }

        graph, err := client.DescribeGraph(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(graph)
        return nil
}

var getNodeMetricsCommand = cli.Command{
        Name:        "getnodemetrics",
        Category:    "Graph",
        Description: "Prints out node metrics calculated from the current graph",
        Usage:       "Get node metrics.",
        Action:      actionDecorator(getNodeMetrics),
}

func getNodeMetrics(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.NodeMetricsRequest{
                Types: []lnrpc.NodeMetricType{lnrpc.NodeMetricType_BETWEENNESS_CENTRALITY},
        }

        nodeMetrics, err := client.GetNodeMetrics(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(nodeMetrics)
        return nil
}

var getChanInfoCommand = cli.Command{
        Name:     "getchaninfo",
        Category: "Graph",
        Usage:    "Get the state of a channel.",
        Description: "Prints out the latest authenticated state for a " +
                "particular channel",
        ArgsUsage: "chan_id",
        Flags: []cli.Flag{
                cli.Uint64Flag{
                        Name: "chan_id",
                        Usage: "The 8-byte compact channel ID to query for. " +
                                "If this is set the chan_point param is " +
                                "ignored.",
                },
                cli.StringFlag{
                        Name: "chan_point",
                        Usage: "The channel point in format txid:index. If " +
                                "the chan_id param is set this param is " +
                                "ignored.",
                },
        },
        Action: actionDecorator(getChanInfo),
}

func getChanInfo(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        var (
                chanID    uint64
                chanPoint string
                err       error
        )

        switch {
        case ctx.IsSet("chan_id"):
                chanID = ctx.Uint64("chan_id")

        case ctx.Args().Present():
                chanID, err = strconv.ParseUint(ctx.Args().First(), 10, 64)
                if err != nil {
                        return fmt.Errorf("error parsing chan_id: %w", err)
                }

        case ctx.IsSet("chan_point"):
                chanPoint = ctx.String("chan_point")

        default:
                return fmt.Errorf("chan_id or chan_point argument missing")
        }

        req := &lnrpc.ChanInfoRequest{
                ChanId:    chanID,
                ChanPoint: chanPoint,
        }

        chanInfo, err := client.GetChanInfo(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(chanInfo)
        return nil
}

var getNodeInfoCommand = cli.Command{
        Name:     "getnodeinfo",
        Category: "Graph",
        Usage:    "Get information on a specific node.",
        Description: "Prints out the latest authenticated node state for an " +
                "advertised node",
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name: "pub_key",
                        Usage: "the 33-byte hex-encoded compressed public of the target " +
                                "node",
                },
                cli.BoolFlag{
                        Name: "include_channels",
                        Usage: "if true, will return all known channels " +
                                "associated with the node",
                },
        },
        Action: actionDecorator(getNodeInfo),
}

func getNodeInfo(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        args := ctx.Args()

        var pubKey string
        switch {
        case ctx.IsSet("pub_key"):
                pubKey = ctx.String("pub_key")
        case args.Present():
                pubKey = args.First()
        default:
                return fmt.Errorf("pub_key argument missing")
        }

        req := &lnrpc.NodeInfoRequest{
                PubKey:          pubKey,
                IncludeChannels: ctx.Bool("include_channels"),
        }

        nodeInfo, err := client.GetNodeInfo(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(nodeInfo)
        return nil
}

var getNetworkInfoCommand = cli.Command{
        Name:     "getnetworkinfo",
        Category: "Channels",
        Usage: "Get statistical information about the current " +
                "state of the network.",
        Description: "Returns a set of statistics pertaining to the known " +
                "channel graph",
        Action: actionDecorator(getNetworkInfo),
}

func getNetworkInfo(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.NetworkInfoRequest{}

        netInfo, err := client.GetNetworkInfo(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(netInfo)
        return nil
}

var debugLevelCommand = cli.Command{
        Name:  "debuglevel",
        Usage: "Set the debug level.",
        Description: `Logging level for all subsystems {trace, debug, info, warn, error, critical, off}
        You may also specify <subsystem>=<level>,<subsystem2>=<level>,... to set the log level for individual subsystems

        Use show to list available subsystems`,
        Flags: []cli.Flag{
                cli.BoolFlag{
                        Name:  "show",
                        Usage: "if true, then the list of available sub-systems will be printed out",
                },
                cli.StringFlag{
                        Name:  "level",
                        Usage: "the level specification to target either a coarse logging level, or granular set of specific sub-systems with logging levels for each",
                },
        },
        Action: actionDecorator(debugLevel),
}

func debugLevel(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()
        req := &lnrpc.DebugLevelRequest{
                Show:      ctx.Bool("show"),
                LevelSpec: ctx.String("level"),
        }

        resp, err := client.DebugLevel(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var listChainTxnsCommand = cli.Command{
        Name:     "listchaintxns",
        Category: "On-chain",
        Usage:    "List transactions from the wallet.",
        Flags: []cli.Flag{
                cli.Int64Flag{
                        Name: "start_height",
                        Usage: "the block height from which to list " +
                                "transactions, inclusive",
                        Value: 0,
                },
                cli.Int64Flag{
                        Name: "end_height",
                        Usage: "the block height until which to list " +
                                "transactions, inclusive; to get " +
                                "transactions until the chain tip, including " +
                                "unconfirmed, set this value to -1",
                        Value: -1,
                },
                cli.UintFlag{
                        Name: "index_offset",
                        Usage: "the index of a transaction that will be " +
                                "used in a query to determine which " +
                                "transaction should be returned in the " +
                                "response",
                        Value: 0,
                },
                cli.IntFlag{
                        Name: "max_transactions",
                        Usage: "the max number of transactions to " +
                                "return; leave at default of 0 to return " +
                                "all transactions",
                        Value: 0,
                },
        },
        Description: `
        List all transactions an address of the wallet was involved in.

        This call will return a list of wallet related transactions that paid
        to an address our wallet controls, or spent utxos that we held.

        By default, this call will get all transactions until the chain tip, 
        including unconfirmed transactions (end_height=-1).`,
        Action: actionDecorator(listChainTxns),
}

func parseBlockHeightInputs(ctx *cli.Context) (int32, int32, error) {
        startHeight := int32(ctx.Int64("start_height"))
        endHeight := int32(ctx.Int64("end_height"))

        if ctx.IsSet("start_height") && ctx.IsSet("end_height") {
                if endHeight != -1 && startHeight > endHeight {
                        return startHeight, endHeight,
                                errors.New("start_height should " +
                                        "be less than end_height if " +
                                        "end_height is not equal to -1")
                }
        }

        if startHeight < 0 {
                return startHeight, endHeight,
                        errors.New("start_height should " +
                                "be greater than or " +
                                "equal to 0")
        }

        return startHeight, endHeight, nil
}

func listChainTxns(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        startHeight, endHeight, err := parseBlockHeightInputs(ctx)

        if err != nil {
                return err
        }

        req := &lnrpc.GetTransactionsRequest{
                IndexOffset:     uint32(ctx.Uint64("index_offset")),
                MaxTransactions: uint32(ctx.Uint64("max_transactions")),
        }
        req.StartHeight = startHeight
        req.EndHeight = endHeight

        resp, err := client.GetTransactions(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var stopCommand = cli.Command{
        Name:  "stop",
        Usage: "Stop and shutdown the daemon.",
        Description: `
        Gracefully stop all daemon subsystems before stopping the daemon itself.
        This is equivalent to stopping it using CTRL-C.`,
        Action: actionDecorator(stopDaemon),
}

func stopDaemon(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        resp, err := client.StopDaemon(ctxc, &lnrpc.StopRequest{})
        if err != nil {
                return err
        }

        printRespJSON(resp)

        return nil
}

var signMessageCommand = cli.Command{
        Name:      "signmessage",
        Category:  "Wallet",
        Usage:     "Sign a message with the node's private key.",
        ArgsUsage: "msg",
        Description: `
        Sign msg with the resident node's private key.
        Returns the signature as a zbase32 string.

        Positional arguments and flags can be used interchangeably but not at the same time!`,
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name:  "msg",
                        Usage: "the message to sign",
                },
        },
        Action: actionDecorator(signMessage),
}

func signMessage(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        var msg []byte

        switch {
        case ctx.IsSet("msg"):
                msg = []byte(ctx.String("msg"))
        case ctx.Args().Present():
                msg = []byte(ctx.Args().First())
        default:
                return fmt.Errorf("msg argument missing")
        }

        resp, err := client.SignMessage(ctxc, &lnrpc.SignMessageRequest{Msg: msg})
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var verifyMessageCommand = cli.Command{
        Name:      "verifymessage",
        Category:  "Wallet",
        Usage:     "Verify a message signed with the signature.",
        ArgsUsage: "msg signature",
        Description: `
        Verify that the message was signed with a properly-formed signature
        The signature must be zbase32 encoded and signed with the private key of
        an active node in the resident node's channel database.

        Positional arguments and flags can be used interchangeably but not at the same time!`,
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name:  "msg",
                        Usage: "the message to verify",
                },
                cli.StringFlag{
                        Name:  "sig",
                        Usage: "the zbase32 encoded signature of the message",
                },
        },
        Action: actionDecorator(verifyMessage),
}

func verifyMessage(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        var (
                msg []byte
                sig string
        )

        args := ctx.Args()

        switch {
        case ctx.IsSet("msg"):
                msg = []byte(ctx.String("msg"))
        case args.Present():
                msg = []byte(ctx.Args().First())
                args = args.Tail()
        default:
                return fmt.Errorf("msg argument missing")
        }

        switch {
        case ctx.IsSet("sig"):
                sig = ctx.String("sig")
        case args.Present():
                sig = args.First()
        default:
                return fmt.Errorf("signature argument missing")
        }

        req := &lnrpc.VerifyMessageRequest{Msg: msg, Signature: sig}
        resp, err := client.VerifyMessage(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var feeReportCommand = cli.Command{
        Name:     "feereport",
        Category: "Channels",
        Usage:    "Display the current fee policies of all active channels.",
        Description: `
        Returns the current fee policies of all active channels.
        Fee policies can be updated using the updatechanpolicy command.`,
        Action: actionDecorator(feeReport),
}

func feeReport(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        req := &lnrpc.FeeReportRequest{}
        resp, err := client.FeeReport(ctxc, req)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var updateChannelPolicyCommand = cli.Command{
        Name:     "updatechanpolicy",
        Category: "Channels",
        Usage: "Update the channel policy for all channels, or a single " +
                "channel.",
        ArgsUsage: "base_fee_msat fee_rate time_lock_delta " +
                "[--max_htlc_msat=N] [channel_point]",
        Description: `
        Updates the channel policy for all channels, or just a particular
        channel identified by its channel point. The update will be committed, 
        and broadcast to the rest of the network within the next batch. Channel
        points are encoded as: funding_txid:output_index
        `,
        Flags: []cli.Flag{
                cli.Int64Flag{
                        Name: "base_fee_msat",
                        Usage: "the base fee in milli-satoshis that will be " +
                                "charged for each forwarded HTLC, regardless " +
                                "of payment size",
                },
                cli.StringFlag{
                        Name: "fee_rate",
                        Usage: "the fee rate that will be charged " +
                                "proportionally based on the value of each " +
                                "forwarded HTLC, the lowest possible rate is " +
                                "0 with a granularity of 0.000001 " +
                                "(millionths). Can not be set at the same " +
                                "time as fee_rate_ppm",
                },
                cli.Uint64Flag{
                        Name: "fee_rate_ppm",
                        Usage: "the fee rate ppm (parts per million) that " +
                                "will be charged proportionally based on the " +
                                "value of each forwarded HTLC, the lowest " +
                                "possible rate is 0 with a granularity of " +
                                "0.000001 (millionths). Can not be set at " +
                                "the same time as fee_rate",
                },
                cli.Int64Flag{
                        Name: "inbound_base_fee_msat",
                        Usage: "the base inbound fee in milli-satoshis that " +
                                "will be charged for each forwarded HTLC, " +
                                "regardless of payment size. Its value must " +
                                "be zero or negative - it is a discount " +
                                "for using a particular incoming channel. " +
                                "Note that forwards will be rejected if the " +
                                "discount exceeds the outbound fee " +
                                "(forward at a loss), and lead to " +
                                "penalization by the sender",
                },
                cli.Int64Flag{
                        Name: "inbound_fee_rate_ppm",
                        Usage: "the inbound fee rate that will be charged " +
                                "proportionally based on the value of each " +
                                "forwarded HTLC and the outbound fee. Fee " +
                                "rate is expressed in parts per million and " +
                                "must be zero or negative - it is a discount " +
                                "for using a particular incoming channel. " +
                                "Note that forwards will be rejected if the " +
                                "discount exceeds the outbound fee " +
                                "(forward at a loss), and lead to " +
                                "penalization by the sender",
                },
                cli.Uint64Flag{
                        Name: "time_lock_delta",
                        Usage: "the CLTV delta that will be applied to all " +
                                "forwarded HTLCs",
                },
                cli.Uint64Flag{
                        Name: "min_htlc_msat",
                        Usage: "if set, the min HTLC size that will be " +
                                "applied to all forwarded HTLCs. If unset, " +
                                "the min HTLC is left unchanged",
                },
                cli.Uint64Flag{
                        Name: "max_htlc_msat",
                        Usage: "if set, the max HTLC size that will be " +
                                "applied to all forwarded HTLCs. If unset, " +
                                "the max HTLC is left unchanged",
                },
                cli.StringFlag{
                        Name: "chan_point",
                        Usage: "the channel which this policy update should " +
                                "be applied to. If nil, the policies for all " +
                                "channels will be updated. Takes the form of " +
                                "txid:output_index",
                },
                cli.BoolFlag{
                        Name: "create_missing_edge",
                        Usage: "Under unknown circumstances a channel can " +
                                "exist with a missing edge in the graph " +
                                "database. This can cause an 'edge not " +
                                "found' error when calling `getchaninfo` " +
                                "and/or cause the default channel policy to " +
                                "be used during forwards. Setting this flag " +
                                "will recreate the edge if not found, " +
                                "allowing updating this channel policy and " +
                                "fixing the missing edge problem for this " +
                                "channel permanently. For fields not set in " +
                                "this command, the default policy will be " +
                                "created.",
                },
        },
        Action: actionDecorator(updateChannelPolicy),
}

func parseChanPoint(s string) (*lnrpc.ChannelPoint, error) {
        split := strings.Split(s, ":")
        if len(split) != 2 || len(split[0]) == 0 || len(split[1]) == 0 {
                return nil, errBadChanPoint
        }

        index, err := strconv.ParseInt(split[1], 10, 64)
        if err != nil {
                return nil, fmt.Errorf("unable to decode output index: %w", err)
        }

        txid, err := chainhash.NewHashFromStr(split[0])
        if err != nil {
                return nil, fmt.Errorf("unable to parse hex string: %w", err)
        }

        return &lnrpc.ChannelPoint{
                FundingTxid: &lnrpc.ChannelPoint_FundingTxidBytes{
                        FundingTxidBytes: txid[:],
                },
                OutputIndex: uint32(index),
        }, nil
}

// parseTimeLockDelta is expected to get a uint16 type of timeLockDelta. Its
// maximum value is MaxTimeLockDelta.
func parseTimeLockDelta(timeLockDeltaStr string) (uint16, error) {
        timeLockDeltaUnCheck, err := strconv.ParseUint(timeLockDeltaStr, 10, 64)
        if err != nil {
                return 0, fmt.Errorf("failed to parse time_lock_delta: %s "+
                        "to uint64, err: %v", timeLockDeltaStr, err)
        }

        if timeLockDeltaUnCheck > routing.MaxCLTVDelta {
                return 0, fmt.Errorf("time_lock_delta is too big, "+
                        "max value is %d", routing.MaxCLTVDelta)
        }

        return uint16(timeLockDeltaUnCheck), nil
}

func updateChannelPolicy(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        var (
                baseFee       int64
                feeRate       float64
                feeRatePpm    uint64
                timeLockDelta uint16
                err           error
        )
        args := ctx.Args()

        switch {
        case ctx.IsSet("base_fee_msat"):
                baseFee = ctx.Int64("base_fee_msat")
        case args.Present():
                baseFee, err = strconv.ParseInt(args.First(), 10, 64)
                if err != nil {
                        return fmt.Errorf("unable to decode base_fee_msat: %w",
                                err)
                }
                args = args.Tail()
        default:
                return fmt.Errorf("base_fee_msat argument missing")
        }

        switch {
        case ctx.IsSet("fee_rate") && ctx.IsSet("fee_rate_ppm"):
                return fmt.Errorf("fee_rate or fee_rate_ppm can not both be set")
        case ctx.IsSet("fee_rate"):
                feeRate = ctx.Float64("fee_rate")
        case ctx.IsSet("fee_rate_ppm"):
                feeRatePpm = ctx.Uint64("fee_rate_ppm")
        case args.Present():
                feeRate, err = strconv.ParseFloat(args.First(), 64)
                if err != nil {
                        return fmt.Errorf("unable to decode fee_rate: %w", err)
                }

                args = args.Tail()
        default:
                return fmt.Errorf("fee_rate or fee_rate_ppm argument missing")
        }

        switch {
        case ctx.IsSet("time_lock_delta"):
                timeLockDeltaStr := ctx.String("time_lock_delta")
                timeLockDelta, err = parseTimeLockDelta(timeLockDeltaStr)
                if err != nil {
                        return err
                }
        case args.Present():
                timeLockDelta, err = parseTimeLockDelta(args.First())
                if err != nil {
                        return err
                }

                args = args.Tail()
        default:
                return fmt.Errorf("time_lock_delta argument missing")
        }

        var (
                chanPoint    *lnrpc.ChannelPoint
                chanPointStr string
        )

        switch {
        case ctx.IsSet("chan_point"):
                chanPointStr = ctx.String("chan_point")
        case args.Present():
                chanPointStr = args.First()
        }

        if chanPointStr != "" {
                chanPoint, err = parseChanPoint(chanPointStr)
                if err != nil {
                        return fmt.Errorf("unable to parse chan_point: %w", err)
                }
        }

        inboundBaseFeeMsat := ctx.Int64("inbound_base_fee_msat")
        if inboundBaseFeeMsat < math.MinInt32 ||
                inboundBaseFeeMsat > math.MaxInt32 {

                return errors.New("inbound_base_fee_msat out of range")
        }

        inboundFeeRatePpm := ctx.Int64("inbound_fee_rate_ppm")
        if inboundFeeRatePpm < math.MinInt32 ||
                inboundFeeRatePpm > math.MaxInt32 {

                return errors.New("inbound_fee_rate_ppm out of range")
        }

        // Inbound fees are optional. However, if an update is required,
        // both the base fee and the fee rate must be provided.
        var inboundFee *lnrpc.InboundFee
        if ctx.IsSet("inbound_base_fee_msat") !=
                ctx.IsSet("inbound_fee_rate_ppm") {

                return errors.New("both parameters must be provided: " +
                        "inbound_base_fee_msat and inbound_fee_rate_ppm")
        }

        if ctx.IsSet("inbound_fee_rate_ppm") {
                inboundFee = &lnrpc.InboundFee{
                        BaseFeeMsat: int32(inboundBaseFeeMsat),
                        FeeRatePpm:  int32(inboundFeeRatePpm),
                }
        }

        createMissingEdge := ctx.Bool("create_missing_edge")

        req := &lnrpc.PolicyUpdateRequest{
                BaseFeeMsat:       baseFee,
                TimeLockDelta:     uint32(timeLockDelta),
                MaxHtlcMsat:       ctx.Uint64("max_htlc_msat"),
                InboundFee:        inboundFee,
                CreateMissingEdge: createMissingEdge,
        }

        if ctx.IsSet("min_htlc_msat") {
                req.MinHtlcMsat = ctx.Uint64("min_htlc_msat")
                req.MinHtlcMsatSpecified = true
        }

        if chanPoint != nil {
                req.Scope = &lnrpc.PolicyUpdateRequest_ChanPoint{
                        ChanPoint: chanPoint,
                }
        } else {
                req.Scope = &lnrpc.PolicyUpdateRequest_Global{
                        Global: true,
                }
        }

        if feeRate != 0 {
                req.FeeRate = feeRate
        } else if feeRatePpm != 0 {
                req.FeeRatePpm = uint32(feeRatePpm)
        }

        resp, err := client.UpdateChannelPolicy(ctxc, req)
        if err != nil {
                return err
        }

        // Parse the response into the final json object that will be printed
        // to stdout. At the moment, this filters out the raw txid bytes from
        // each failed update's outpoint and only prints the txid string.
        var listFailedUpdateResp = struct {
                FailedUpdates []*FailedUpdate `json:"failed_updates"`
        }{
                FailedUpdates: make([]*FailedUpdate, 0, len(resp.FailedUpdates)),
        }
        for _, protoUpdate := range resp.FailedUpdates {
                failedUpdate := NewFailedUpdateFromProto(protoUpdate)
                listFailedUpdateResp.FailedUpdates = append(
                        listFailedUpdateResp.FailedUpdates, failedUpdate)
        }

        printJSON(listFailedUpdateResp)

        return nil
}

var fishCompletionCommand = cli.Command{
        Name:   "fish-completion",
        Hidden: true,
        Action: func(c *cli.Context) error {
                completion, err := c.App.ToFishCompletion()
                if err != nil {
                        return err
                }

                // We don't want to suggest files, so we add this
                // first line to the completions.
                _, err = fmt.Printf("complete -c %q -f \n%s", c.App.Name, completion)
                return err
        },
}

var exportChanBackupCommand = cli.Command{
        Name:     "exportchanbackup",
        Category: "Channels",
        Usage: "Obtain a static channel back up for a selected channels, " +
                "or all known channels.",
        ArgsUsage: "[chan_point] [--all] [--output_file]",
        Description: `
        This command allows a user to export a Static Channel Backup (SCB) for
        a selected channel. SCB's are encrypted backups of a channel's initial
        state that are encrypted with a key derived from the seed of a user. In
        the case of partial or complete data loss, the SCB will allow the user
        to reclaim settled funds in the channel at its final state. The
        exported channel backups can be restored at a later time using the
        restorechanbackup command.

        This command will return one of two types of channel backups depending
        on the set of passed arguments:

           * If a target channel point is specified, then a single channel
             backup containing only the information for that channel will be
             returned.

           * If the --all flag is passed, then a multi-channel backup will be
             returned. A multi backup is a single encrypted blob (displayed in
             hex encoding) that contains several channels in a single cipher
             text.

        Both of the backup types can be restored using the restorechanbackup
        command.
        `,
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name:  "chan_point",
                        Usage: "the target channel to obtain an SCB for",
                },
                cli.BoolFlag{
                        Name: "all",
                        Usage: "if specified, then a multi backup of all " +
                                "active channels will be returned",
                },
                cli.StringFlag{
                        Name: "output_file",
                        Usage: `
                        if specified, then rather than printing a JSON output
                        of the static channel backup, a serialized version of
                        the backup (either Single or Multi) will be written to
                        the target file, this is the same format used by lnd in
                        its channel.backup file `,
                },
        },
        Action: actionDecorator(exportChanBackup),
}

func exportChanBackup(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        // Show command help if no arguments provided
        if ctx.NArg() == 0 && ctx.NumFlags() == 0 {
                cli.ShowCommandHelp(ctx, "exportchanbackup")
                return nil
        }

        var (
                err            error
                chanPointStr   string
                outputFileName string
        )
        args := ctx.Args()

        switch {
        case ctx.IsSet("chan_point"):
                chanPointStr = ctx.String("chan_point")

        case args.Present():
                chanPointStr = args.First()

        case !ctx.IsSet("all"):
                return fmt.Errorf("must specify chan_point if --all isn't set")
        }

        if ctx.IsSet("output_file") {
                outputFileName = ctx.String("output_file")
        }

        if chanPointStr != "" {
                chanPointRPC, err := parseChanPoint(chanPointStr)
                if err != nil {
                        return fmt.Errorf("unable to parse chan_point: %w", err)
                }

                chanBackup, err := client.ExportChannelBackup(
                        ctxc, &lnrpc.ExportChannelBackupRequest{
                                ChanPoint: chanPointRPC,
                        },
                )
                if err != nil {
                        return err
                }

                txid, err := chainhash.NewHash(
                        chanPointRPC.GetFundingTxidBytes(),
                )
                if err != nil {
                        return err
                }

                chanPoint := wire.OutPoint{
                        Hash:  *txid,
                        Index: chanPointRPC.OutputIndex,
                }

                if outputFileName != "" {
                        return os.WriteFile(
                                outputFileName,
                                chanBackup.ChanBackup,
                                0666,
                        )
                }

                printJSON(struct {
                        ChanPoint  string `json:"chan_point"`
                        ChanBackup string `json:"chan_backup"`
                }{
                        ChanPoint:  chanPoint.String(),
                        ChanBackup: hex.EncodeToString(chanBackup.ChanBackup),
                })
                return nil
        }

        if !ctx.IsSet("all") {
                return fmt.Errorf("if a channel isn't specified, -all must be")
        }

        chanBackup, err := client.ExportAllChannelBackups(
                ctxc, &lnrpc.ChanBackupExportRequest{},
        )
        if err != nil {
                return err
        }

        if outputFileName != "" {
                return os.WriteFile(
                        outputFileName,
                        chanBackup.MultiChanBackup.MultiChanBackup,
                        0666,
                )
        }

        // TODO(roasbeef): support for export | restore ?

        var chanPoints []string
        for _, chanPoint := range chanBackup.MultiChanBackup.ChanPoints {
                txid, err := chainhash.NewHash(chanPoint.GetFundingTxidBytes())
                if err != nil {
                        return err
                }

                chanPoints = append(chanPoints, wire.OutPoint{
                        Hash:  *txid,
                        Index: chanPoint.OutputIndex,
                }.String())
        }

        printRespJSON(chanBackup)

        return nil
}

var verifyChanBackupCommand = cli.Command{
        Name:      "verifychanbackup",
        Category:  "Channels",
        Usage:     "Verify an existing channel backup.",
        ArgsUsage: "[--single_backup] [--multi_backup] [--multi_file]",
        Description: `
    This command allows a user to verify an existing Single or Multi channel
    backup for integrity. This is useful when a user has a backup, but is
    unsure as to if it's valid or for the target node.

    The command will accept backups in one of four forms:

       * A single channel packed SCB, which can be obtained from
         exportchanbackup. This should be passed in hex encoded format.

       * A packed multi-channel SCB, which couples several individual
         static channel backups in single blob.

       * A file path which points to a packed single-channel backup within a
         file, using the same format that lnd does in its channel.backup file.

       * A file path which points to a packed multi-channel backup within a
         file, using the same format that lnd does in its channel.backup
         file.
    `,
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name: "single_backup",
                        Usage: "a hex encoded single channel backup obtained " +
                                "from exportchanbackup",
                },
                cli.StringFlag{
                        Name: "multi_backup",
                        Usage: "a hex encoded multi-channel backup obtained " +
                                "from exportchanbackup",
                },

                cli.StringFlag{
                        Name:      "single_file",
                        Usage:     "the path to a single-channel backup file",
                        TakesFile: true,
                },

                cli.StringFlag{
                        Name:      "multi_file",
                        Usage:     "the path to a multi-channel back up file",
                        TakesFile: true,
                },
        },
        Action: actionDecorator(verifyChanBackup),
}

func verifyChanBackup(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        // Show command help if no arguments provided
        if ctx.NArg() == 0 && ctx.NumFlags() == 0 {
                cli.ShowCommandHelp(ctx, "verifychanbackup")
                return nil
        }

        backups, err := parseChanBackups(ctx)
        if err != nil {
                return err
        }

        verifyReq := lnrpc.ChanBackupSnapshot{}

        if backups.GetChanBackups() != nil {
                verifyReq.SingleChanBackups = backups.GetChanBackups()
        }
        if backups.GetMultiChanBackup() != nil {
                verifyReq.MultiChanBackup = &lnrpc.MultiChanBackup{
                        MultiChanBackup: backups.GetMultiChanBackup(),
                }
        }

        resp, err := client.VerifyChanBackup(ctxc, &verifyReq)
        if err != nil {
                return err
        }

        printRespJSON(resp)
        return nil
}

var restoreChanBackupCommand = cli.Command{
        Name:     "restorechanbackup",
        Category: "Channels",
        Usage: "Restore an existing single or multi-channel static channel " +
                "backup.",
        ArgsUsage: "[--single_backup] [--multi_backup] [--multi_file=",
        Description: `
        Allows a user to restore a Static Channel Backup (SCB) that was
        obtained either via the exportchanbackup command, or from lnd's
        automatically managed channel.backup file. This command should be used
        if a user is attempting to restore a channel due to data loss on a
        running node restored with the same seed as the node that created the
        channel. If successful, this command will allows the user to recover
        the settled funds stored in the recovered channels.

        The command will accept backups in one of four forms:

           * A single channel packed SCB, which can be obtained from
             exportchanbackup. This should be passed in hex encoded format.

           * A packed multi-channel SCB, which couples several individual
             static channel backups in single blob.

           * A file path which points to a packed single-channel backup within
             a file, using the same format that lnd does in its channel.backup
             file.

           * A file path which points to a packed multi-channel backup within a
             file, using the same format that lnd does in its channel.backup
             file.
        `,
        Flags: []cli.Flag{
                cli.StringFlag{
                        Name: "single_backup",
                        Usage: "a hex encoded single channel backup obtained " +
                                "from exportchanbackup",
                },
                cli.StringFlag{
                        Name: "multi_backup",
                        Usage: "a hex encoded multi-channel backup obtained " +
                                "from exportchanbackup",
                },

                cli.StringFlag{
                        Name:      "single_file",
                        Usage:     "the path to a single-channel backup file",
                        TakesFile: true,
                },

                cli.StringFlag{
                        Name:      "multi_file",
                        Usage:     "the path to a multi-channel back up file",
                        TakesFile: true,
                },
        },
        Action: actionDecorator(restoreChanBackup),
}

// errMissingChanBackup is an error returned when we attempt to parse a channel
// backup from a CLI command, and it is missing.
var errMissingChanBackup = errors.New("missing channel backup")

func parseChanBackups(ctx *cli.Context) (*lnrpc.RestoreChanBackupRequest, error) {
        switch {
        case ctx.IsSet("single_backup"):
                packedBackup, err := hex.DecodeString(
                        ctx.String("single_backup"),
                )
                if err != nil {
                        return nil, fmt.Errorf("unable to decode single packed "+
                                "backup: %v", err)
                }

                return &lnrpc.RestoreChanBackupRequest{
                        Backup: &lnrpc.RestoreChanBackupRequest_ChanBackups{
                                ChanBackups: &lnrpc.ChannelBackups{
                                        ChanBackups: []*lnrpc.ChannelBackup{
                                                {
                                                        ChanBackup: packedBackup,
                                                },
                                        },
                                },
                        },
                }, nil

        case ctx.IsSet("multi_backup"):
                packedMulti, err := hex.DecodeString(
                        ctx.String("multi_backup"),
                )
                if err != nil {
                        return nil, fmt.Errorf("unable to decode multi packed "+
                                "backup: %v", err)
                }

                return &lnrpc.RestoreChanBackupRequest{
                        Backup: &lnrpc.RestoreChanBackupRequest_MultiChanBackup{
                                MultiChanBackup: packedMulti,
                        },
                }, nil

        case ctx.IsSet("single_file"):
                packedSingle, err := os.ReadFile(ctx.String("single_file"))
                if err != nil {
                        return nil, fmt.Errorf("unable to decode single "+
                                "packed backup: %v", err)
                }

                return &lnrpc.RestoreChanBackupRequest{
                        Backup: &lnrpc.RestoreChanBackupRequest_ChanBackups{
                                ChanBackups: &lnrpc.ChannelBackups{
                                        ChanBackups: []*lnrpc.ChannelBackup{{
                                                ChanBackup: packedSingle,
                                        }},
                                },
                        },
                }, nil

        case ctx.IsSet("multi_file"):
                packedMulti, err := os.ReadFile(ctx.String("multi_file"))
                if err != nil {
                        return nil, fmt.Errorf("unable to decode multi packed "+
                                "backup: %v", err)
                }

                return &lnrpc.RestoreChanBackupRequest{
                        Backup: &lnrpc.RestoreChanBackupRequest_MultiChanBackup{
                                MultiChanBackup: packedMulti,
                        },
                }, nil

        default:
                return nil, errMissingChanBackup
        }
}

func restoreChanBackup(ctx *cli.Context) error {
        ctxc := getContext()
        client, cleanUp := getClient(ctx)
        defer cleanUp()

        // Show command help if no arguments provided
        if ctx.NArg() == 0 && ctx.NumFlags() == 0 {
                cli.ShowCommandHelp(ctx, "restorechanbackup")
                return nil
        }

        var req lnrpc.RestoreChanBackupRequest

        backups, err := parseChanBackups(ctx)
        if err != nil {
                return err
        }

        req.Backup = backups.Backup

        resp, err := client.RestoreChannelBackups(ctxc, &req)
        if err != nil {
                return fmt.Errorf("unable to restore chan backups: %w", err)
        }

        printRespJSON(resp)

        return nil
}

lightningnetwork / lnd / 13866475355

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