124 lines
3.7 KiB
C
124 lines
3.7 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 "funding.h"
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#include "commit_tx.h"
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#include "bitcoin/signature.h"
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#include "bitcoin/pubkey.h"
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#include "bitcoin/privkey.h"
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#include "close_tx.h"
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#include "find_p2sh_out.h"
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#include "protobuf_convert.h"
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#include "gather_updates.h"
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#include "opt_bits.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 *close_tx;
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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, final1, final2;
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struct sha256_double anchor_txid;
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u8 *redeemscript;
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char *close_file = NULL;
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u64 close_fee = 10000;
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struct channel_state *cstate;
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err_set_progname(argv[0]);
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opt_register_arg("--complete=<close-msg-file>",
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opt_set_charp, NULL, &close_file,
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"Create a close_transaction_complete msg instead");
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opt_register_noarg("--help|-h", opt_usage_and_exit,
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"<open-channel-file1> <open-channel-file2> <anchor-file> <commit-privkey> [{+/-}update-protobuf]...\n"
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"Create the signature needed for the close transaction",
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"Print this message.");
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opt_register_arg("--close-fee=<bits>",
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opt_set_bits, opt_show_bits, &close_fee,
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"100's of satoshi to pay for close tx");
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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 (close_file) {
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CloseChannel *c;
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c = pkt_from_file(close_file, PKT__PKT_CLOSE)->close;
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close_fee = c->close_fee;
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}
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cstate = gather_updates(ctx, o1, o2, a, close_fee, argv + 5, NULL,
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NULL, NULL, NULL);
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/* Get pubkeys */
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if (!proto_to_pubkey(secp256k1_context_create(0),
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o1->commit_key, &pubkey2))
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errx(1, "Invalid o1 commit pubkey");
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if (!pubkey_eq(&pubkey1, &pubkey2))
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errx(1, "o1 pubkey != this privkey");
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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 o2 commit pubkey");
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if (!proto_to_pubkey(secp256k1_context_create(0),
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o1->final_key, &final1))
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errx(1, "Invalid o1 final pubkey");
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if (!proto_to_pubkey(secp256k1_context_create(0),
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o2->final_key, &final2))
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errx(1, "Invalid o2 final pubkey");
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/* This is what the anchor pays to. */
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redeemscript = bitcoin_redeem_2of2(ctx, &pubkey1, &pubkey2);
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proto_to_sha256(a->txid, &anchor_txid.sha);
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close_tx = create_close_tx(secp256k1_context_create(0),
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ctx, &final1, &final2,
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&anchor_txid, a->output_index, a->amount,
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cstate->a.pay_msat / 1000,
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cstate->b.pay_msat / 1000);
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/* Sign it for them. */
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sign_tx_input(secp256k1_context_create(SECP256K1_CONTEXT_SIGN),
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close_tx, 0, redeemscript, tal_count(redeemscript),
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&privkey, &pubkey1, &sig);
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if (close_file)
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pkt = close_channel_complete_pkt(ctx, &sig);
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else
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pkt = close_channel_pkt(ctx, close_fee, &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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