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116 lines
3.8 KiB
116 lines
3.8 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 "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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OpenCommitSig *cs2;
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AnchorSpend mysigs = ANCHOR_SPEND__INIT;
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struct bitcoin_tx *commit;
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struct sha256_double anchor_txid1, anchor_txid2;
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struct pubkey pubkey1, pubkey2, final1, final2;
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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 sha256 rhash, escape_hash1, escape_hash2;
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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-sig-2> <commit-key1>\n"
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"Output the commitment transaction if both signatures are valid",
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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 != 7)
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opt_usage_exit_fail("Expected 6 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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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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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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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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cs2 = pkt_from_file(argv[5], PKT__PKT_OPEN_COMMIT_SIG)->open_commit_sig;
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if (!key_from_base58(argv[6], strlen(argv[6]), &testnet, &privkey, &pubkey1))
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errx(1, "Invalid private key '%s'", argv[6]);
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if (!testnet)
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errx(1, "Private key '%s' not on testnet!", argv[6]);
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/* Pubkey well-formed? */
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if (!proto_to_pubkey(o2->commitkey, &pubkey2))
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errx(1, "Invalid open-2 key");
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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(o1->final, &final1))
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errx(1, "Invalid o1 final pubkey");
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/* Now create our commitment tx. */
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proto_to_sha256(o1->revocation_hash, &rhash);
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commit = create_commit_tx(ctx, o1, o2, &rhash, 0,
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&anchor_txid1, oa1->index, o1->total_input,
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&anchor_txid2, oa2->index, o2->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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/* Check they signed out anchor inputs correctly. */
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if (!check_anchor_spend(commit, inmap, &pubkey1, &final1, &escape_hash1,
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&pubkey2, &final2, &escape_hash2,
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&pubkey2, cs2->sigs))
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errx(1, "Bad signature");
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if (!sign_anchor_spend(commit, inmap, &pubkey1, &final1, &escape_hash1,
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&pubkey2, &final2, &escape_hash2,
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&pubkey1, &privkey, sigs))
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errx(1, "Could not sign tx");
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/* populate_anchor_inscripts wants args in protobuf */
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mysigs.sig0 = signature_to_proto(ctx, &sigs[0]);
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mysigs.sig1 = signature_to_proto(ctx, &sigs[1]);
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/* Shouldn't fail, since we checked them in check_anchor_spend */
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if (!populate_anchor_inscripts(commit, commit, inmap,
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&pubkey1, &final1, &escape_hash1,
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&pubkey2, &final2, &escape_hash2,
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&mysigs,
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cs2->sigs))
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errx(1, "Malformed signatures");
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/* Print it out in hex. */
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if (!bitcoin_tx_write(STDOUT_FILENO, commit))
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err(1, "Writing out transaction");
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tal_free(ctx);
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return 0;
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}
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