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106 lines
3.4 KiB
106 lines
3.4 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 "escape_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 *oa2;
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struct bitcoin_tx *escape;
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struct sha256 escape_hash2;
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struct sha256_double anchor_txid2;
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struct pkt *pkt;
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struct signature escape_sig, fast_escape_sig;
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struct privkey privkey;
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u8 *redeemscript;
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bool testnet;
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struct pubkey pubkey1, pubkey2, final1, final2;
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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-file2> <escape-privkey>\n"
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"Create the signatures needed for the other side's escape 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 != 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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if (!proto_to_pubkey(o1->commitkey, &pubkey1))
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errx(1, "Invalid o1 commit 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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oa2 = pkt_from_file(argv[3], PKT__PKT_OPEN_ANCHOR)->open_anchor;
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if (!key_from_base58(argv[4], strlen(argv[4]), &testnet, &privkey, &final1))
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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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proto_to_sha256(oa2->anchor_txid, &anchor_txid2.sha);
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/* Now create THEIR escape tx to spend output of their anchor. */
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escape = create_escape_tx(ctx, o2, o1, &anchor_txid2, oa2->index,
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o2->total_input, o2->escape_fee);
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/* If contributions don't exceed fees, this fails. */
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if (!escape)
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errx(1, "Input %llu vs fees %llu",
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(long long)o2->total_input,
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(long long)o2->escape_fee);
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/* Sign input for their anchor. */
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redeemscript = bitcoin_redeem_anchor(ctx, &pubkey2, &pubkey1,
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&final1, &escape_hash2);
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if (!sign_tx_input(ctx, escape, 0,
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redeemscript, tal_count(redeemscript),
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&privkey, &final1, &escape_sig))
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errx(1, "Could not sign their escape tx");
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/* Now create THEIR fast escape tx to spend output of their anchor. */
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escape = create_fast_escape_tx(ctx, o2, o1, &anchor_txid2, oa2->index,
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o2->total_input, o2->escape_fee);
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/* If contributions don't exceed fees, this fails. */
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if (!escape)
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errx(1, "Input %llu vs fees %llu",
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(long long)o2->total_input,
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(long long)o2->escape_fee);
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/* It's spending the same output, so same redeemscript */
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if (!sign_tx_input(ctx, escape, 0,
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redeemscript, tal_count(redeemscript),
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&privkey, &final1, &fast_escape_sig))
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errx(1, "Could not sign their fast escape tx");
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pkt = open_escape_sig_pkt(ctx, &escape_sig, &fast_escape_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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