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create-commit-tx: allow creation of initial opening tx.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2015-06-12 14:32:48 +09:30
parent fb036399eb
commit a700a5cdca
1 changed files with 34 additions and 22 deletions
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56
test-cli/create-commit-tx.c
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@ -23,12 +23,12 @@
#include <openssl/ec.h> #include <openssl/ec.h>
#include <unistd.h> #include <unistd.h>
/* FIXME: this code doesn't work if we're not the ones proposing the delta */
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
const tal_t *ctx = tal_arr(NULL, char, 0); const tal_t *ctx = tal_arr(NULL, char, 0);
OpenChannel *o1, *o2; OpenChannel *o1, *o2;
Update *update; Pkt *pkt;
UpdateAccept *update_acc;
struct bitcoin_tx *anchor, *commit; struct bitcoin_tx *anchor, *commit;
struct sha256_double anchor_txid; struct sha256_double anchor_txid;
EC_KEY *privkey; EC_KEY *privkey;
@ -44,28 +44,25 @@ int main(int argc, char *argv[])
err_set_progname(argv[0]); err_set_progname(argv[0]);
opt_register_noarg("--help|-h", opt_usage_and_exit, opt_register_noarg("--help|-h", opt_usage_and_exit,
"<anchor-tx> <open-channel-file1> <open-channel-file2> <final-update> <final-update-accept> <commit-privkey> [<previous-updates>]\n" "<anchor-tx> <open-channel-file1> <open-channel-file2> <commit-privkey> [final-update-accept|open-commit-sig] [<updates>]\n"
"Create the signature needed for the commit transaction", "Create the signature needed for the commit transaction",
"Print this message."); "Print this message.");
opt_parse(&argc, argv, opt_log_stderr_exit); opt_parse(&argc, argv, opt_log_stderr_exit);
if (argc < 7) if (argc < 6)
opt_usage_exit_fail("Expected 6+ arguments"); opt_usage_exit_fail("Expected 5+ arguments");
anchor = bitcoin_tx_from_file(ctx, argv[1]); anchor = bitcoin_tx_from_file(ctx, argv[1]);
bitcoin_txid(anchor, &anchor_txid); bitcoin_txid(anchor, &anchor_txid);
o1 = pkt_from_file(argv[2], PKT__PKT_OPEN)->open; o1 = pkt_from_file(argv[2], PKT__PKT_OPEN)->open;
o2 = pkt_from_file(argv[3], PKT__PKT_OPEN)->open; o2 = pkt_from_file(argv[3], PKT__PKT_OPEN)->open;
update = pkt_from_file(argv[4], PKT__PKT_UPDATE)->update; privkey = key_from_base58(argv[4], strlen(argv[4]), &testnet, &pubkey1);
update_acc = pkt_from_file(argv[5], PKT__PKT_UPDATE_ACCEPT)->update_accept;
privkey = key_from_base58(argv[6], strlen(argv[6]), &testnet, &pubkey1);
if (!privkey) if (!privkey)
errx(1, "Invalid private key '%s'", argv[6]); errx(1, "Invalid private key '%s'", argv[4]);
if (!testnet) if (!testnet)
errx(1, "Private key '%s' not on testnet!", argv[6]); errx(1, "Private key '%s' not on testnet!", argv[4]);
/* Get pubkeys */ /* Get pubkeys */
if (!proto_to_pubkey(o1->anchor->pubkey, &pubkey2)) if (!proto_to_pubkey(o1->anchor->pubkey, &pubkey2))
@ -76,17 +73,37 @@ int main(int argc, char *argv[])
if (!proto_to_pubkey(o2->anchor->pubkey, &pubkey2)) if (!proto_to_pubkey(o2->anchor->pubkey, &pubkey2))
errx(1, "Invalid o2 anchor pubkey"); errx(1, "Invalid o2 anchor pubkey");
/* Figure out cumulative delta since anchor. */ /* Their signature comes from open-commit or from update-accept. */
delta = update->delta; sig2.stype = SIGHASH_ALL;
for (i = 7; i < argc; i++) { pkt = any_pkt_from_file(argv[5]);
Update *u = pkt_from_file(argv[i], PKT__PKT_UPDATE)->update;
delta += u->delta; switch (pkt->pkt_case) {
case PKT__PKT_UPDATE_ACCEPT:
if (!proto_to_signature(pkt->update_accept->sig, &sig2.sig))
errx(1, "Invalid update-accept sig");
break;
case PKT__PKT_OPEN_COMMIT_SIG:
if (!proto_to_signature(pkt->open_commit_sig->sig, &sig2.sig))
errx(1, "Invalid open-commit-sig sig");
break;
default:
errx(1, "Unexpected packet type %u in %s",
pkt->pkt_case, argv[5]);
} }
/* Initial revocation hash comes from open. */
proto_to_sha256(o1->revocation_hash, &rhash);
delta = 0;
/* Figure out cumulative delta since anchor, update revocation hash */
for (i = 6; i < argc; i++) {
Update *u = pkt_from_file(argv[i], PKT__PKT_UPDATE)->update;
delta += u->delta;
proto_to_sha256(u->revocation_hash, &rhash);
}
redeemscript = bitcoin_redeem_2of2(ctx, &pubkey1, &pubkey2); redeemscript = bitcoin_redeem_2of2(ctx, &pubkey1, &pubkey2);
/* Now create commitment tx to spend 2/2 output of anchor. */ /* Now create commitment tx to spend 2/2 output of anchor. */
proto_to_sha256(update->revocation_hash, &rhash);
commit = create_commit_tx(ctx, o1, o2, &rhash, delta, &anchor_txid, commit = create_commit_tx(ctx, o1, o2, &rhash, delta, &anchor_txid,
find_p2sh_out(anchor, redeemscript)); find_p2sh_out(anchor, redeemscript));
@ -99,11 +116,6 @@ int main(int argc, char *argv[])
sign_tx_input(ctx, commit, 0, redeemscript, tal_count(redeemscript), sign_tx_input(ctx, commit, 0, redeemscript, tal_count(redeemscript),
privkey, &pubkey1, &sig1.sig); privkey, &pubkey1, &sig1.sig);
/* Their signatures comes from the update_accept packet. */
sig2.stype = SIGHASH_ALL;
if (!proto_to_signature(update_acc->sig, &sig2.sig))
errx(1, "Invalid update-accept sig");
if (!check_2of2_sig(commit, 0, redeemscript, tal_count(redeemscript), if (!check_2of2_sig(commit, 0, redeemscript, tal_count(redeemscript),
&pubkey1, &pubkey2, &sig1, &sig2)) &pubkey1, &pubkey2, &sig1, &sig2))
errx(1, "Signature failed"); errx(1, "Signature failed");