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lncli: send key

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Extend lncli with a flag that indicates the intention to send
a spontaneous payment. lncli will generate a preimage/hash combination
and send the preimage as a custom record to the recipient.
This commit is contained in:
Joost Jager 2019-12-05 12:27:17 +01:00
parent c08865f4ae
commit b1206f67c2
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GPG key ID: A61B9D4C393C59C7
1 changed files with 33 additions and 8 deletions
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41
cmd/lncli/commands.go
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@ -4,6 +4,7 @@ import (
"bufio"
"bytes"
"context"
"crypto/rand"
"encoding/hex"
"errors"
"fmt"
@ -24,6 +25,8 @@ import (
"github.com/lightninglabs/protobuf-hex-display/proto"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/record"
"github.com/lightningnetwork/lnd/routing/route"
"github.com/lightningnetwork/lnd/walletunlocker"
"github.com/urfave/cli"
@ -2164,6 +2167,10 @@ var sendPaymentCommand = cli.Command{
Name: "final_cltv_delta",
Usage: "the number of blocks the last hop has to reveal the preimage",
},
cli.BoolFlag{
Name: "key_send",
Usage: "will generate a pre-image and encode it in the sphinx packet, a dest must be set [experimental]",
},
),
Action: sendPayment,
}
@ -2268,14 +2275,32 @@ func sendPayment(ctx *cli.Context) error {
var rHash []byte
switch {
case ctx.IsSet("payment_hash"):
rHash, err = hex.DecodeString(ctx.String("payment_hash"))
case args.Present():
rHash, err = hex.DecodeString(args.First())
args = args.Tail()
default:
return fmt.Errorf("payment hash argument missing")
if ctx.Bool("key_send") {
if ctx.IsSet("payment_hash") {
return errors.New("cannot set payment hash when using " +
"key send")
}
var preimage lntypes.Preimage
if _, err := rand.Read(preimage[:]); err != nil {
return err
}
req.DestCustomRecords = map[uint64][]byte{
record.KeySendType: preimage[:],
}
hash := preimage.Hash()
rHash = hash[:]
} else {
switch {
case ctx.IsSet("payment_hash"):
rHash, err = hex.DecodeString(ctx.String("payment_hash"))
case args.Present():
rHash, err = hex.DecodeString(args.First())
args = args.Tail()
default:
return fmt.Errorf("payment hash argument missing")
}
}
if err != nil {