74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/* My example:
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* ./update-channel <A-SEED> <my-delta-in-satoshis> A-open.pb B-open.pb anchor.tx <A-TMPKEY> > A-update-1.pb
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*/
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#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 "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 "signature.h"
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#include "commit_tx.h"
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#include "pubkey.h"
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#include "find_p2sh_out.h"
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#include <openssl/ec.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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struct sha256 seed, revocation_hash;
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struct pkt *pkt;
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unsigned long long to_them = 0, from_them = 0;
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int64_t this_delta;
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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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"<seed> [previous-updates]\n"
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"Create a new update message",
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"Print this message.");
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opt_register_arg("--to-them=<satoshi>",
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opt_set_ulonglongval_si, NULL, &to_them,
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"Amount to pay them (must use this or --from-them)");
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opt_register_arg("--from-them=<satoshi>",
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opt_set_ulonglongval_si, NULL, &from_them,
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"Amount to pay us (must use this or --to-them)");
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opt_parse(&argc, argv, opt_log_stderr_exit);
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if (!from_them && !to_them)
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opt_usage_exit_fail("Must use --to-them or --from-them");
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if (argc < 2)
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opt_usage_exit_fail("Expected 1+ arguments");
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if (!hex_decode(argv[1], strlen(argv[1]), &seed, sizeof(seed)))
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errx(1, "Invalid seed '%s' - need 256 hex bits", argv[1]);
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this_delta = from_them - to_them;
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if (!this_delta)
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errx(1, "Delta must not be zero");
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/* Get next revocation hash. */
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shachain_from_seed(&seed, argc - 2 + 1, &revocation_hash);
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sha256(&revocation_hash,
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revocation_hash.u.u8, sizeof(revocation_hash.u.u8));
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pkt = update_pkt(ctx, &revocation_hash, this_delta);
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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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