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99 lines
3.2 KiB
99 lines
3.2 KiB
#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 "anchor.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 <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 *oa1, *oa2;
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struct bitcoin_tx *commit;
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struct sha256 escape_hash1, escape_hash2;
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struct sha256_double anchor_txid1, anchor_txid2;
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struct pkt *pkt;
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struct signature sigs[2];
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struct privkey privkey;
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bool testnet;
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struct pubkey pubkey1, pubkey2, final1, final2;
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struct sha256 rhash;
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size_t inmap[2];
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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> <open-anchor-file2> <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_parse(&argc, argv, opt_log_stderr_exit);
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if (argc != 6)
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opt_usage_exit_fail("Expected 5 arguments");
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o1 = pkt_from_file(argv[1], PKT__PKT_OPEN)->open;
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proto_to_sha256(o1->escape_hash, &escape_hash1);
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if (!proto_to_pubkey(o1->final, &final1))
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errx(1, "Invalid o1 final pubkey");
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o2 = pkt_from_file(argv[2], PKT__PKT_OPEN)->open;
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proto_to_sha256(o2->escape_hash, &escape_hash2);
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if (!proto_to_pubkey(o2->final, &final2))
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errx(1, "Invalid o2 final pubkey");
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if (!proto_to_pubkey(o2->commitkey, &pubkey2))
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errx(1, "Invalid o2 commit pubkey");
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oa1 = pkt_from_file(argv[3], PKT__PKT_OPEN_ANCHOR)->open_anchor;
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oa2 = pkt_from_file(argv[4], PKT__PKT_OPEN_ANCHOR)->open_anchor;
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if (!key_from_base58(argv[5], strlen(argv[5]), &testnet, &privkey, &pubkey1))
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errx(1, "Invalid private key '%s'", argv[5]);
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if (!testnet)
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errx(1, "Private key '%s' not on testnet!", argv[5]);
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proto_to_sha256(oa1->anchor_txid, &anchor_txid1.sha);
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proto_to_sha256(oa2->anchor_txid, &anchor_txid2.sha);
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/* Now create THEIR commitment tx to spend outputs of anchors. */
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proto_to_sha256(o2->revocation_hash, &rhash);
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commit = create_commit_tx(ctx, o2, o1, &rhash, 0,
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&anchor_txid2, oa2->index, o2->total_input,
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&anchor_txid1, oa1->index, o1->total_input,
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inmap);
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/* If contributions don't exceed fees, this fails. */
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if (!commit)
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errx(1, "Contributions %llu & %llu vs fees %llu & %llu",
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(long long)o1->total_input,
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(long long)o2->total_input,
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(long long)o1->commitment_fee,
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(long long)o2->commitment_fee);
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/* Since we're signing theirs, "my" and "their" args are backwards. */
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if (!sign_anchor_spend(commit, inmap,
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&pubkey2, &final2, &escape_hash2,
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&pubkey1, &final1, &escape_hash1,
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&pubkey1, &privkey, sigs))
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errx(1, "Could not sign tx");
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pkt = open_commit_sig_pkt(ctx, sigs);
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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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