mirror of
https://github.com/ElementsProject/lightning.git
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102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/* My example:
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* ./open-anchor-scriptsigs A-open.pb B-open.pb cUjoranStkpgTRumAJZNiNEkknJv5UA7wzW1nZ7aPsm9ZWjkxypZ > A-anchor-scriptsigs.pb
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* ./open-anchor-scriptsigs B-open.pb A-open.pb cNggXygY8fPHWHEdoDqRa6xALau8gVMLq6q6vzMs2eNegLrJGNAW > B-anchor-scriptsigs.pb
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*/
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#include <ccan/err/err.h>
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#include <ccan/opt/opt.h>
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#include <ccan/read_write_all/read_write_all.h>
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#include "bitcoin_tx.h"
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#include "signature.h"
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#include "lightning.pb-c.h"
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#include "pkt.h"
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#include "bitcoin_script.h"
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#include "bitcoin_address.h"
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#include "base58.h"
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#include "anchor.h"
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#include "pubkey.h"
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#include <openssl/ec.h>
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#include <unistd.h>
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/* All the input scripts are already set to 0. We just need to make this one. */
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static u8 *tx_scriptsig(const tal_t *ctx,
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struct bitcoin_tx *tx,
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unsigned int i,
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const BitcoinInput *input,
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EC_KEY *privkey,
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const struct pubkey *pubkey)
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{
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struct bitcoin_signature sig;
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sig.stype = SIGHASH_ALL;
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if (!sign_tx_input(ctx, tx, i,
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input->subscript.data, input->subscript.len,
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privkey, &sig.sig))
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return NULL;
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if (!is_pay_to_pubkey_hash(input->subscript.data, input->subscript.len))
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errx(1, "FIXME: Don't know how to handle input");
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return scriptsig_pay_to_pubkeyhash(ctx, pubkey, &sig);
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}
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int main(int argc, char *argv[])
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{
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OpenChannel *o1, *o2;
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const tal_t *ctx = tal_arr(NULL, char, 0);
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struct bitcoin_tx *anchor;
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struct pkt *pkt;
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size_t i;
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u8 **sigs;
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size_t *map;
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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> <privkey>...\n"
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"Create signatures for transactions, and output to stdout",
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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 < 3)
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opt_usage_exit_fail("Expected 2 or more 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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/* Create merged transaction */
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anchor = anchor_tx_create(ctx, o1, o2, &map, NULL);
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if (!anchor)
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errx(1, "Failed transaction merge");
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/* Sign our inputs. */
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if (o1->anchor->n_inputs != argc - 3)
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errx(1, "Expected %zu private keys", o1->anchor->n_inputs);
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sigs = tal_arr(ctx, u8 *, o1->anchor->n_inputs);
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for (i = 0; i < o1->anchor->n_inputs; i++) {
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struct pubkey pubkey;
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EC_KEY *privkey;
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bool testnet;
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privkey = key_from_base58(argv[3+i], strlen(argv[3+i]),
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&testnet, &pubkey);
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if (!privkey)
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errx(1, "Invalid private key '%s'", argv[3+i]);
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if (!testnet)
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errx(1, "Private key '%s' not on testnet!", argv[3+i]);
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sigs[i] = tx_scriptsig(sigs, anchor, map[i],
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o1->anchor->inputs[i],
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privkey, &pubkey);
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}
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pkt = open_anchor_sig_pkt(ctx, sigs, o1->anchor->n_inputs);
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if (!write_all(STDOUT_FILENO, pkt,
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sizeof(pkt->len) + le32_to_cpu(pkt->len)))
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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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