98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
#include <ccan/crypto/shachain/shachain.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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#include <ccan/opt/opt.h>
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#include <ccan/str/hex/hex.h>
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#include <ccan/err/err.h>
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#include <ccan/read_write_all/read_write_all.h>
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#include "lightning.pb-c.h"
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#include "bitcoin/base58.h"
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#include "pkt.h"
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#include "bitcoin/script.h"
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#include "permute_tx.h"
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#include "bitcoin/signature.h"
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#include "commit_tx.h"
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#include "bitcoin/pubkey.h"
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#include "bitcoin/privkey.h"
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#include "protobuf_convert.h"
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#include "funding.h"
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#include "gather_updates.h"
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#include "version.h"
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#include <unistd.h>
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int main(int argc, char *argv[])
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{
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const tal_t *ctx = tal_arr(NULL, char, 0);
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OpenChannel *o1, *o2;
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OpenAnchor *a;
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struct bitcoin_tx *commit;
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struct pkt *pkt;
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struct signature sig;
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struct privkey privkey;
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bool testnet;
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struct pubkey pubkey1, pubkey2;
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u8 *subscript;
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struct sha256 rhash;
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struct channel_state *cstate;
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err_set_progname(argv[0]);
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opt_register_noarg("--help|-h", opt_usage_and_exit,
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"<open-channel-file1> <open-channel-file2> <open-anchor-file1> <commit-privkey>\n"
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"Create the signature needed for the commit transaction",
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"Print this message.");
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opt_register_version();
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opt_parse(&argc, argv, opt_log_stderr_exit);
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if (argc != 5)
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opt_usage_exit_fail("Expected 4 arguments");
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o1 = pkt_from_file(argv[1], PKT__PKT_OPEN)->open;
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o2 = pkt_from_file(argv[2], PKT__PKT_OPEN)->open;
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a = pkt_from_file(argv[3], PKT__PKT_OPEN_ANCHOR)->open_anchor;
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if (!key_from_base58(secp256k1_context_create(SECP256K1_CONTEXT_VERIFY
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| SECP256K1_CONTEXT_SIGN),
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argv[4], strlen(argv[4]), &testnet, &privkey, &pubkey1))
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errx(1, "Invalid private key '%s'", argv[4]);
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if (!testnet)
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errx(1, "Private key '%s' not on testnet!", argv[4]);
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if (is_funder(o1) == is_funder(o2))
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errx(1, "Must be exactly one funder");
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/* Now create THEIR commitment tx to spend 2/2 output of anchor. */
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cstate = initial_funding(ctx, is_funder(o2), a->amount,
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commit_fee(o2->commitment_fee,
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o1->commitment_fee));
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if (!cstate)
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errx(1, "Invalid open combination (too low for fees)");
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proto_to_sha256(o2->revocation_hash, &rhash);
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commit = commit_tx_from_pkts(ctx, o2, o1, a, &rhash, cstate);
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/* If contributions don't exceed fees, this fails. */
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if (!commit)
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errx(1, "Invalid packets?");
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/* Their pubkey must be valid */
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if (!proto_to_pubkey(secp256k1_context_create(0),
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o2->commit_key, &pubkey2))
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errx(1, "Invalid public open-channel-file2");
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/* Sign it for them. */
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subscript = bitcoin_redeem_2of2(ctx, &pubkey1, &pubkey2);
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sign_tx_input(secp256k1_context_create(SECP256K1_CONTEXT_SIGN),
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commit, 0, subscript, tal_count(subscript),
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&privkey, &pubkey1, &sig);
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pkt = open_commit_sig_pkt(ctx, &sig);
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if (!write_all(STDOUT_FILENO, pkt, pkt_totlen(pkt)))
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err(1, "Writing out packet");
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tal_free(ctx);
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return 0;
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}
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