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a4dfe3ad72
This shows where funds are going at any time (fees vs to each side). funding.c is mainly rewritten, and should be clearer now. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
103 lines
3.1 KiB
C
103 lines
3.1 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 "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 "bitcoin/signature.h"
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#include "commit_tx.h"
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#include "bitcoin/pubkey.h"
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#include "bitcoin/privkey.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 "funding.h"
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#include <unistd.h>
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/* FIXME: this code doesn't work if we're not the ones proposing the delta */
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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 *commit;
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struct privkey privkey;
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bool testnet;
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struct bitcoin_signature sig1, sig2;
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struct pubkey pubkey1, pubkey2;
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u8 *redeemscript;
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struct sha256 rhash;
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struct channel_state *cstate;
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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-file> <commit-privkey> [<updates>]\n"
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"Create the signature needed for the commit 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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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(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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/* Get pubkeys */
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if (!proto_to_pubkey(o1->commit_key, &pubkey2))
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errx(1, "Invalid o1 commit pubkey");
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if (pubkey_len(&pubkey1) != pubkey_len(&pubkey2)
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|| memcmp(pubkey1.key, pubkey2.key, pubkey_len(&pubkey2)) != 0)
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errx(1, "o1 pubkey != this privkey");
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if (!proto_to_pubkey(o2->commit_key, &pubkey2))
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errx(1, "Invalid o2 commit pubkey");
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sig2.stype = SIGHASH_ALL;
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cstate = gather_updates(ctx, o1, o2, a, commit_fee(o1, o2), argv + 5,
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NULL, &rhash, NULL, &sig2.sig);
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redeemscript = bitcoin_redeem_2of2(ctx, &pubkey1, &pubkey2);
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/* Now create commitment tx to spend 2/2 output of anchor. */
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commit = create_commit_tx(ctx, o1, o2, a, &rhash, cstate);
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/* This only fails on malformed packets */
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if (!commit)
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errx(1, "Malformed packets");
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/* We generate our signature. */
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sig1.stype = SIGHASH_ALL;
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sign_tx_input(ctx, commit, 0, redeemscript, tal_count(redeemscript),
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&privkey, &pubkey1, &sig1.sig);
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/* Check it works with theirs... */
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if (!check_2of2_sig(commit, 0, redeemscript, tal_count(redeemscript),
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&pubkey1, &pubkey2, &sig1, &sig2))
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errx(1, "Signature failed");
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/* Create p2sh input for commit */
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commit->input[0].script = scriptsig_p2sh_2of2(commit, &sig1, &sig2,
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&pubkey1, &pubkey2);
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commit->input[0].script_length = tal_count(commit->input[0].script);
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/* Print it out in hex. */
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if (!bitcoin_tx_write(STDOUT_FILENO, commit))
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err(1, "Writing out transaction");
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tal_free(ctx);
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return 0;
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}
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