mirror of
https://github.com/ElementsProject/lightning.git
synced 2025-01-07 14:29:33 +01:00
3260fb2ed1
Both sides elect a commitment fee, and the lowest is chosen. That means you can't game the other side (but if you offer too low, then can error out of course). Fees are split 50-50 if possible: originally the whole fee has to be paid by the (single) funder. Neither side can withdraw funds which would make them unable to pay fees. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
#include <ccan/crypto/shachain/shachain.h>
|
|
#include <ccan/short_types/short_types.h>
|
|
#include <ccan/tal/tal.h>
|
|
#include <ccan/opt/opt.h>
|
|
#include <ccan/str/hex/hex.h>
|
|
#include <ccan/err/err.h>
|
|
#include "lightning.pb-c.h"
|
|
#include "bitcoin/base58.h"
|
|
#include "pkt.h"
|
|
#include "bitcoin/script.h"
|
|
#include "permute_tx.h"
|
|
#include "bitcoin/signature.h"
|
|
#include "bitcoin/pubkey.h"
|
|
#include "close_tx.h"
|
|
#include "find_p2sh_out.h"
|
|
#include "protobuf_convert.h"
|
|
#include "gather_updates.h"
|
|
#include <unistd.h>
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
const tal_t *ctx = tal_arr(NULL, char, 0);
|
|
OpenChannel *o1, *o2;
|
|
OpenAnchor *a;
|
|
struct bitcoin_tx *close_tx;
|
|
struct bitcoin_signature sig1, sig2;
|
|
struct pubkey pubkey1, pubkey2;
|
|
u8 *redeemscript;
|
|
CloseChannel *close;
|
|
CloseChannelComplete *closecomplete;
|
|
uint64_t our_amount, their_amount;
|
|
|
|
err_set_progname(argv[0]);
|
|
|
|
/* FIXME: Take update.pbs to adjust channel */
|
|
opt_register_noarg("--help|-h", opt_usage_and_exit,
|
|
"<open-channel-file1> <open-channel-file2> <open-anchor-file> <close-protobuf> <close-complete-protobuf> [update-protobuf]...\n"
|
|
"Create the close transaction from the signatures",
|
|
"Print this message.");
|
|
|
|
opt_parse(&argc, argv, opt_log_stderr_exit);
|
|
|
|
if (argc < 6)
|
|
opt_usage_exit_fail("Expected 5+ arguments");
|
|
|
|
o1 = pkt_from_file(argv[1], PKT__PKT_OPEN)->open;
|
|
o2 = pkt_from_file(argv[2], PKT__PKT_OPEN)->open;
|
|
a = pkt_from_file(argv[3], PKT__PKT_OPEN_ANCHOR)->open_anchor;
|
|
close = pkt_from_file(argv[4], PKT__PKT_CLOSE)->close;
|
|
closecomplete = pkt_from_file(argv[5], PKT__PKT_CLOSE_COMPLETE)->close_complete;
|
|
|
|
/* Pubkeys well-formed? */
|
|
if (!proto_to_pubkey(o1->commit_key, &pubkey1))
|
|
errx(1, "Invalid o1 commit_key");
|
|
if (!proto_to_pubkey(o2->commit_key, &pubkey2))
|
|
errx(1, "Invalid o2 commit_key");
|
|
|
|
/* Get delta by accumulting all the updates. */
|
|
gather_updates(o1, o2, a, 0, argv + 6, &our_amount, &their_amount,
|
|
NULL, NULL, NULL);
|
|
|
|
/* This is what the anchor pays to; figure out which output. */
|
|
redeemscript = bitcoin_redeem_2of2(ctx, &pubkey1, &pubkey2);
|
|
|
|
/* Now create the close tx to spend 2/2 output of anchor. */
|
|
close_tx = create_close_tx(ctx, o1, o2, a, our_amount, their_amount);
|
|
|
|
/* Signatures well-formed? */
|
|
sig1.stype = sig2.stype = SIGHASH_ALL;
|
|
if (!proto_to_signature(close->sig, &sig1.sig))
|
|
errx(1, "Invalid close-packet");
|
|
if (!proto_to_signature(closecomplete->sig, &sig2.sig))
|
|
errx(1, "Invalid closecomplete-packet");
|
|
|
|
/* Combined signatures must validate correctly. */
|
|
if (!check_2of2_sig(close_tx, 0, redeemscript, tal_count(redeemscript),
|
|
&pubkey1, &pubkey2, &sig1, &sig2))
|
|
errx(1, "Signature failed");
|
|
|
|
/* Create p2sh input for close_tx */
|
|
close_tx->input[0].script = scriptsig_p2sh_2of2(close_tx, &sig1, &sig2,
|
|
&pubkey1, &pubkey2);
|
|
close_tx->input[0].script_length = tal_count(close_tx->input[0].script);
|
|
|
|
/* Print it out in hex. */
|
|
if (!bitcoin_tx_write(STDOUT_FILENO, close_tx))
|
|
err(1, "Writing out transaction");
|
|
|
|
tal_free(ctx);
|
|
return 0;
|
|
}
|