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lightning
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open-channel: use pubkey, not arbitrary script for final outout address. 

We need to pay to this from two places: on their side, it's a simple
payment, on our side, it's a complex timeout-or-mutual-or-hval script,
which doesn't lend itself to arbitrary scripts.

Use P2SH, of course.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
ppa-0.6.1
Rusty Russell 10 years ago
parent
0742e5356f
commit
29d0cdc3cd
7 changed files with 35 additions and 35 deletions
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  1. 14
      commit_tx.c
  2. 10
      lightning.pb-c.c
  3. 4
      lightning.pb-c.h
  4. 2
      lightning.proto
  5. 27
      open-channel.c
  6. 7
      pkt.c
  7. 6
      pkt.h

14
commit_tx.c
View File

@ -14,7 +14,7 @@ struct bitcoin_tx *create_commit_tx(const tal_t *ctx,
{
struct bitcoin_tx *tx;
const u8 *redeemscript;
struct pubkey ourkey, theirkey;
struct pubkey ourkey, theirkey, to_me;
struct sha256 redeem;
/* Now create commitment tx: one input, two outputs. */
@ -42,10 +42,14 @@ struct bitcoin_tx *create_commit_tx(const tal_t *ctx,
return tal_free(tx);
tx->output[0].amount = ours->anchor->total - ours->commitment_fee;
/* Second output is a simple payment to them. */
tx->output[1].script = theirs->script_to_me.data;
tx->output[1].script_length = theirs->script_to_me.len;
/* Second output is a P2SH payment to them. */
if (!proto_to_pubkey(theirs->to_me, &to_me))
return tal_free(tx);
tx->output[1].script = scriptpubkey_p2sh(ctx,
bitcoin_redeem_single(ctx,
&to_me));
tx->output[1].script_length = tal_count(tx->output[1].script);
if (theirs->anchor->total < theirs->commitment_fee)
return tal_free(tx);
tx->output[1].amount = theirs->anchor->total - theirs->commitment_fee;

10
lightning.pb-c.c
View File

@ -1513,13 +1513,13 @@ static const ProtobufCFieldDescriptor open_channel__field_descriptors[7] =
0,NULL,NULL /* reserved1,reserved2, etc */
},
{
"script_to_me",
"to_me",
5,
PROTOBUF_C_LABEL_REQUIRED,
PROTOBUF_C_TYPE_BYTES,
PROTOBUF_C_TYPE_MESSAGE,
0, /* quantifier_offset */
offsetof(OpenChannel, script_to_me),
NULL,
offsetof(OpenChannel, to_me),
&bitcoin_pubkey__descriptor,
NULL,
0, /* flags */
0,NULL,NULL /* reserved1,reserved2, etc */
@ -1566,8 +1566,8 @@ static const unsigned open_channel__field_indices_by_name[] = {
4, /* field[4] = commitment_fee */
1, /* field[1] = locktime_seconds */
2, /* field[2] = revocation_hash */
3, /* field[3] = script_to_me */
0, /* field[0] = seed */
3, /* field[3] = to_me */
6, /* field[6] = tx_version */
};
static const ProtobufCIntRange open_channel__number_ranges[2 + 1] =

4
lightning.pb-c.h
View File

@ -194,7 +194,7 @@ struct _OpenChannel
/*
* How to pay money to us from commit_tx.
*/
ProtobufCBinaryData script_to_me;
BitcoinPubkey *to_me;
/*
* How much transaction fee we'll pay for commitment txs.
*/
@ -210,7 +210,7 @@ struct _OpenChannel
};
#define OPEN_CHANNEL__INIT \
{ PROTOBUF_C_MESSAGE_INIT (&open_channel__descriptor) \
, 0, 0, NULL, {0,NULL}, 0, NULL, 0 }
, 0, 0, NULL, NULL, 0, NULL, 0 }
/*

2
lightning.proto
View File

@ -77,7 +77,7 @@ message open_channel {
// Hash seed for revoking commitment transactions.
required sha256_hash revocation_hash = 4;
// How to pay money to us from commit_tx.
required bytes script_to_me = 5;
required bitcoin_pubkey to_me = 5;
// How much transaction fee we'll pay for commitment txs.
required uint64 commitment_fee = 6;
// The anchor transaction details.

27
open-channel.c
View File

@ -1,6 +1,6 @@
/* My example:
* ./open-channel 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff 50000000000 mzqiPPbjTdcgM6NpNWJLHFt29tWD69bciE cUBCjrdJu8tfvM7FT8So6aqs6G6bZS1Cax6Rc9rFzYL6nYG4XNEC mi1BzT4tCB7K4kZH3yK1hM517bXH4pNmEH 08ffaf638849198f9c8f04aa75d225a5a104d5e7c540770ca55ad08b9a32d10c/1/100000000000/76a9148d2d939aa2aff2d341cde3e61a89bf9c2c21d12388ac > A-open.pb
* ./open-channel 112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00 9795000 mpDyc5kPAJZB7Zz9iW9acq3Jk8yiTJ7HKj cQXhbUnNRsFcdzTQwjbCrud5yVskHTEas7tZPUWoJYNk5htGQrpi mrvw5JC5SKcEsRpSaRss6A3jLR6DMwpxep 8cb044605f33ca907b966701f49e0bd80b4294696b57f8cf45f22398a1e63a23/0/9800000/76a9143b2aab840afb327a12c8a90fb4ed45b6892eb80988ac > B-open.pb
* ./open-channel 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff 50000000000 mzqiPPbjTdcgM6NpNWJLHFt29tWD69bciE cUBCjrdJu8tfvM7FT8So6aqs6G6bZS1Cax6Rc9rFzYL6nYG4XNEC cTuY5gncxDymqe9dfF7R8QFdAsxMZxdViRMjs8Dj7xJJRsQcmPCt 08ffaf638849198f9c8f04aa75d225a5a104d5e7c540770ca55ad08b9a32d10c/1/100000000000/76a9148d2d939aa2aff2d341cde3e61a89bf9c2c21d12388ac > A-open.pb
* ./open-channel 112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00 9795000 mpDyc5kPAJZB7Zz9iW9acq3Jk8yiTJ7HKj cQXhbUnNRsFcdzTQwjbCrud5yVskHTEas7tZPUWoJYNk5htGQrpi cQXhbUnNRsFcdzTQwjbCrud5yVskHTEas7tZPUWoJYNk5htGQrpi 8cb044605f33ca907b966701f49e0bd80b4294696b57f8cf45f22398a1e63a23/0/9800000/76a9143b2aab840afb327a12c8a90fb4ed45b6892eb80988ac > B-open.pb
*/
#include <ccan/crypto/shachain/shachain.h>
#include <ccan/short_types/short_types.h>
@ -102,17 +102,16 @@ static u64 weak_random64(void)
int main(int argc, char *argv[])
{
struct sha256 seed, revocation_hash;
struct bitcoin_address changeaddr, returnaddr;
struct bitcoin_address changeaddr;
struct pkt *pkt;
const tal_t *ctx = tal_arr(NULL, char, 0);
Anchor anchor = ANCHOR__INIT;
u64 commit_tx_fee, total_in;
unsigned int locktime_seconds;
bool testnet;
u8 *script_to_me;
size_t i;
struct pubkey commitkey;
EC_KEY *commitprivkey;
struct pubkey commitkey, outkey;
EC_KEY *commitprivkey, *outprivkey;
err_set_progname(argv[0]);
@ -126,7 +125,7 @@ int main(int argc, char *argv[])
locktime_seconds = LOCKTIME_MIN + 24 * 60 * 60;
opt_register_noarg("--help|-h", opt_usage_and_exit,
"<seed> <amount> <changeaddr> <commitprivkey> <returnaddr> <txid>/<outnum>/<satoshis>/<script-in-hex>...\n"
"<seed> <amount> <changeaddr> <commitprivkey> <outpubkey> <txid>/<outnum>/<satoshis>/<script-in-hex>...\n"
"A test program to output openchannel on stdout.",
"Print this message.");
opt_register_arg("--min-anchor-confirms",
@ -168,10 +167,12 @@ int main(int argc, char *argv[])
if (!testnet)
errx(1, "Private key '%s' not on testnet!", argv[4]);
if (!bitcoin_from_base58(&testnet, &returnaddr, argv[5], strlen(argv[5])))
errx(1, "Invalid bitcoin address '%s'", argv[5]);
outprivkey = key_from_base58(argv[5], strlen(argv[5]), &testnet,
&outkey);
if (!outprivkey)
errx(1, "Invalid private key '%s'", argv[5]);
if (!testnet)
errx(1, "Bitcoin address '%s' not on testnet!", argv[5]);
errx(1, "Private key '%s' not on testnet!", argv[5]);
anchor.n_inputs = (argc - 6);
anchor.inputs = tal_arr(ctx, BitcoinInput *, anchor.n_inputs);
@ -205,11 +206,7 @@ int main(int argc, char *argv[])
/* Get first revocation hash. */
shachain_from_seed(&seed, 0, &revocation_hash);
/* Make simple output script to pay to my pubkey. */
script_to_me = scriptpubkey_pay_to_pubkeyhash(ctx, &returnaddr);
pkt = openchannel_pkt(ctx, weak_random64(), &revocation_hash,
tal_count(script_to_me), script_to_me,
pkt = openchannel_pkt(ctx, weak_random64(), &revocation_hash, &outkey,
commit_tx_fee, locktime_seconds, &anchor);
if (!write_all(STDOUT_FILENO, pkt,

7
pkt.c
View File

@ -4,6 +4,7 @@
#include "pkt.h"
#include "bitcoin_tx.h"
#include "bitcoin_address.h"
#include "pubkey.h"
#include "signature.h"
#include <stdio.h>
@ -50,8 +51,7 @@ void proto_to_sha256(const Sha256Hash *pb, struct sha256 *hash)
struct pkt *openchannel_pkt(const tal_t *ctx,
u64 seed,
const struct sha256 *revocation_hash,
size_t script_len,
const void *script,
const struct pubkey *to_me,
u64 commitment_fee,
u32 rel_locktime_seconds,
Anchor *anchor)
@ -64,8 +64,7 @@ struct pkt *openchannel_pkt(const tal_t *ctx,
o.seed = seed;
o.revocation_hash = sha256_to_proto(ctx, revocation_hash);
o.script_to_me.len = script_len;
o.script_to_me.data = (void *)script;
o.to_me = pubkey_to_proto(ctx, to_me);
o.commitment_fee = commitment_fee;
o.anchor = anchor;
o.locktime_seconds = rel_locktime_seconds;

6
pkt.h
View File

@ -22,13 +22,14 @@ Pkt *pkt_from_file(const char *filename, Pkt__PktCase expect);
struct sha256;
struct bitcoin_compressed_pubkey;
struct signature;
struct pubkey;
/**
* openchannel_pkt - create an openchannel message
* @ctx: tal context to allocate off.
* @seed: psuedo-random seed to shuffle inputs.
* @revocation_hash: first hash value generated from seed.
* @script_len, @script: the script which pays to us.
* @to_me: the pubkey for the commit transactions' P2SH output.
* @commitment_fee: the fee to use for commitment tx.
* @rel_locktime_seconds: relative seconds for commitment locktime.
* @anchor: the anchor transaction details.
@ -36,8 +37,7 @@ struct signature;
struct pkt *openchannel_pkt(const tal_t *ctx,
u64 seed,
const struct sha256 *revocation_hash,
size_t script_len,
const void *script,
const struct pubkey *to_me,
u64 commitment_fee,
u32 rel_locktime_seconds,
Anchor *anchor);

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