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189 lines
6.1 KiB
189 lines
6.1 KiB
/* Code to make a mutual close tx, useful for generating test cases.
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*
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* For example, in the spec tests we use the following:
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*
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* lightning/devtools/mkclose 189c40b0728f382fe91c87270926584e48e0af3a6789f37454afee6c7560311d 0 0.00999877btc 253 0.00999877btc 0000000000000000000000000000000000000000000000000000000000000010 0000000000000000000000000000000000000000000000000000000000000020 026957e53b46df017bd6460681d068e1d23a7b027de398272d0b15f59b78d060a9 03a9f795ff2e4c27091f40e8f8277301824d1c3dfa6b0204aa92347314e41b1033
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*/
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#include <bitcoin/script.h>
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#include <bitcoin/tx.h>
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#include <ccan/err/err.h>
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#include <ccan/str/hex/hex.h>
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#include <channeld/full_channel.h>
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#include <common/amount.h>
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#include <common/derive_basepoints.h>
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#include <common/htlc_wire.h>
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#include <common/initial_commit_tx.h>
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#include <common/key_derive.h>
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#include <common/keyset.h>
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#include <common/status.h>
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#include <common/type_to_string.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdio.h>
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static bool verbose = false;
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void status_fmt(enum log_level level,
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const struct node_id *node_id,
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const char *fmt, ...)
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{
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if (verbose) {
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va_list ap;
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va_start(ap, fmt);
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printf("#TRACE: ");
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vprintf(fmt, ap);
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printf("\n");
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va_end(ap);
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}
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}
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void status_failed(enum status_failreason reason, const char *fmt, ...)
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{
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abort();
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}
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static char *sig_as_hex(const struct bitcoin_signature *sig)
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{
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u8 compact_sig[64];
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secp256k1_ecdsa_signature_serialize_compact(secp256k1_ctx,
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compact_sig,
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&sig->s);
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return tal_hexstr(NULL, compact_sig, sizeof(compact_sig));
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}
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int main(int argc, char *argv[])
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{
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struct pubkey funding_pubkey[NUM_SIDES], outkey[NUM_SIDES];
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struct privkey funding_privkey[NUM_SIDES];
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struct amount_sat funding_amount;
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struct bitcoin_txid funding_txid;
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unsigned int funding_outnum;
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u32 feerate_per_kw;
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struct amount_sat fee;
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struct bitcoin_signature local_sig, remote_sig;
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struct amount_msat local_msat, remote_msat;
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int argnum, num_outputs;
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struct bitcoin_tx *tx;
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u8 **witness;
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const u8 *funding_wscript;
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const struct chainparams *chainparams = chainparams_for_network("bitcoin");
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const struct amount_sat dust_limit = AMOUNT_SAT(546);
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setup_locale();
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secp256k1_ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY |
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SECP256K1_CONTEXT_SIGN);
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if (argv[1] && streq(argv[1], "-v")) {
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verbose = true;
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argv++;
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argc--;
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}
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if (argc != 10)
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errx(1, "Usage: mkclose [-v] <funding-txid> <funding-txout> <funding-amount> <feerate-per-kw> <local-msat> <local-funding-privkey> <remote-funding-privkey> <local-close-pubkey> <remote-close-pubkey>\n"
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"(Fee is deducted from local-msat)");
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argnum = 1;
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if (!bitcoin_txid_from_hex(argv[argnum],
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strlen(argv[argnum]), &funding_txid))
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errx(1, "Bad funding-txid");
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argnum++;
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funding_outnum = atoi(argv[argnum++]);
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if (!parse_amount_sat(&funding_amount, argv[argnum], strlen(argv[argnum])))
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errx(1, "Bad funding-amount");
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argnum++;
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feerate_per_kw = atoi(argv[argnum++]);
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if (!parse_amount_msat(&local_msat,
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argv[argnum], strlen(argv[argnum])))
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errx(1, "Bad local-msat");
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argnum++;
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if (!hex_decode(argv[argnum], strlen(argv[argnum]),
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&funding_privkey[LOCAL], sizeof(funding_privkey[LOCAL])))
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errx(1, "Parsing local-funding_privkey");
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argnum++;
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if (!hex_decode(argv[argnum], strlen(argv[argnum]),
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&funding_privkey[REMOTE], sizeof(funding_privkey[REMOTE])))
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errx(1, "Parsing remote-funding_privkey");
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argnum++;
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if (!pubkey_from_hexstr(argv[argnum], strlen(argv[argnum]),
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&outkey[LOCAL]))
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errx(1, "Parsing local-close-pubkey");
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argnum++;
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if (!pubkey_from_hexstr(argv[argnum], strlen(argv[argnum]),
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&outkey[REMOTE]))
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errx(1, "Parsing remote-close-pubkey");
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argnum++;
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fee = commit_tx_base_fee(feerate_per_kw, 0);
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if (!amount_msat_sub_sat(&local_msat, local_msat, fee))
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errx(1, "Can't afford fee %s",
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type_to_string(NULL, struct amount_sat, &fee));
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if (!amount_sat_sub_msat(&remote_msat, funding_amount, local_msat))
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errx(1, "Can't afford local_msat");
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if (!pubkey_from_privkey(&funding_privkey[LOCAL], &funding_pubkey[LOCAL])
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|| !pubkey_from_privkey(&funding_privkey[REMOTE], &funding_pubkey[REMOTE]))
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errx(1, "Bad deriving funding pubkeys");
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tx = bitcoin_tx(NULL, chainparams, 1, 2, 0);
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num_outputs = 0;
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if (amount_msat_greater_eq_sat(local_msat, dust_limit)) {
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u8 *script = scriptpubkey_p2wpkh(NULL, &outkey[LOCAL]);
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printf("# local witness script: %s\n", tal_hex(NULL, script));
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/* One output is to us. */
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bitcoin_tx_add_output(tx, script, NULL,
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amount_msat_to_sat_round_down(local_msat));
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num_outputs++;
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} else
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printf("# local output trimmed\n");
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if (amount_msat_greater_eq_sat(remote_msat, dust_limit)) {
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u8 *script = scriptpubkey_p2wpkh(NULL, &outkey[REMOTE]);
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printf("# remote witness script: %s\n", tal_hex(NULL, script));
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/* Other output is to them. */
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bitcoin_tx_add_output(tx, script, NULL,
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amount_msat_to_sat_round_down(remote_msat));
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num_outputs++;
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} else
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printf("# remote output trimmed\n");
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/* Can't have no outputs at all! */
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if (num_outputs == 0)
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errx(1, "Can't afford any output!");
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funding_wscript = bitcoin_redeem_2of2(NULL,
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&funding_pubkey[LOCAL],
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&funding_pubkey[REMOTE]);
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printf("# funding witness script = %s\n",
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tal_hex(NULL, funding_wscript));
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/* Our input spends the anchor tx output. */
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bitcoin_tx_add_input(tx, &funding_txid, funding_outnum,
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BITCOIN_TX_DEFAULT_SEQUENCE, NULL,
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funding_amount, NULL, funding_wscript);
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sign_tx_input(tx, 0, NULL, funding_wscript,
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&funding_privkey[LOCAL],
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&funding_pubkey[LOCAL],
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SIGHASH_ALL, &local_sig);
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printf("localsig: %s\n", sig_as_hex(&local_sig));
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sign_tx_input(tx, 0, NULL, funding_wscript,
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&funding_privkey[REMOTE],
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&funding_pubkey[REMOTE],
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SIGHASH_ALL, &remote_sig);
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printf("remotesig: %s\n", sig_as_hex(&remote_sig));
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witness =
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bitcoin_witness_2of2(NULL, &local_sig, &remote_sig,
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&funding_pubkey[LOCAL],
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&funding_pubkey[REMOTE]);
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bitcoin_tx_input_set_witness(tx, 0, witness);
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printf("# signed close transaction: %s\n",
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tal_hex(NULL, linearize_tx(NULL, tx)));
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return 0;
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}
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