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182 lines
6.4 KiB
182 lines
6.4 KiB
/* My example:
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* ./open-channel 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff 50000000000 030da36b810c0930e5fe8b74014665873f6901d9f46018a5fda743a93dec7f0e4e cUBCjrdJu8tfvM7FT8So6aqs6G6bZS1Cax6Rc9rFzYL6nYG4XNEC cTuY5gncxDymqe9dfF7R8QFdAsxMZxdViRMjs8Dj7xJJRsQcmPCt 08ffaf638849198f9c8f04aa75d225a5a104d5e7c540770ca55ad08b9a32d10c/1/100000000000/76a9148d2d939aa2aff2d341cde3e61a89bf9c2c21d12388ac > A-open.pb
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* ./open-channel 112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00 9795000 022e314a8f7a814e0900bf094f704b233dc693349cf55b888b43d902d7be251e95 cQXhbUnNRsFcdzTQwjbCrud5yVskHTEas7tZPUWoJYNk5htGQrpi cQXhbUnNRsFcdzTQwjbCrud5yVskHTEas7tZPUWoJYNk5htGQrpi 8cb044605f33ca907b966701f49e0bd80b4294696b57f8cf45f22398a1e63a23/0/9800000/76a9143b2aab840afb327a12c8a90fb4ed45b6892eb80988ac > B-open.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 "bitcoin/base58.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 "bitcoin/tx.h"
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#include "bitcoin/pubkey.h"
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#include "bitcoin/shadouble.h"
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#include "protobuf_convert.h"
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#include <openssl/ec.h>
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#include <unistd.h>
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#include "opt_bits.h"
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/* Bitcoin nodes are allowed to be 2 hours in the future. */
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#define LOCKTIME_MIN (2 * 60 * 60)
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static BitcoinInput *parse_anchor_input(const tal_t *ctx, const char *spec)
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{
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BitcoinInput *in = tal(ctx, BitcoinInput);
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struct sha256_double txid;
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const char *slash;
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char *end;
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long l;
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bitcoin_input__init(in);
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slash = strchr(spec, '/');
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if (!slash)
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errx(1, "Expected / in <txid>/<num>/<satoshis>/<hexscript>");
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if (!bitcoin_txid_from_hex(spec, slash - spec, &txid))
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errx(1, "Expected 256-bit hex txid before /");
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in->txid = sha256_to_proto(in, &txid.sha);
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in->output = l = strtol(slash + 1, &end, 10);
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if (end == slash + 1 || *end != '/' || (int64_t)in->output != (int64_t)l)
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errx(1, "Expected <outputnum> after /");
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slash = end;
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in->amount = l = strtol(slash + 1, &end, 10);
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if (end == slash + 1 || *end != '/' || (int64_t)in->amount != (int64_t)l)
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errx(1, "Expected <satoshis> after second /");
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slash = end;
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in->subscript.len = strlen(slash + 1) / 2;
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in->subscript.data = tal_arr(in, u8, in->subscript.len);
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if (!hex_decode(slash + 1, strlen(slash + 1),
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in->subscript.data, in->subscript.len))
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errx(1, "Expected hex string after third /");
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return in;
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}
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/* FIXME: This is too weak, even for us! */
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static u64 weak_random64(void)
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{
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return time(NULL);
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}
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/* Simple helper to open a channel. */
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int main(int argc, char *argv[])
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{
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struct sha256 seed, revocation_hash;
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struct pkt *pkt;
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const tal_t *ctx = tal_arr(NULL, char, 0);
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Anchor anchor = ANCHOR__INIT;
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u64 commit_tx_fee, total_in;
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unsigned int locktime_seconds;
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bool testnet;
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size_t i;
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struct pubkey commitkey, outkey, changekey;
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EC_KEY *commitprivkey, *outprivkey;
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err_set_progname(argv[0]);
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/* Default values. */
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anchor.min_confirms = 3;
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/* Remember, other side contributes to fee, too. */
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anchor.fee = 5000;
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/* We only need this for involuntary close, so make it larger. */
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commit_tx_fee = 100000;
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/* This means we have ~1 day before they can steal our money. */
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locktime_seconds = LOCKTIME_MIN + 24 * 60 * 60;
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opt_register_noarg("--help|-h", opt_usage_and_exit,
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"<seed> <amount> <changepubkey> <commitprivkey> <outprivkey> <txid>/<outnum>/<satoshis>/<script-in-hex>...\n"
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"A test program to output openchannel on stdout.",
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"Print this message.");
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opt_register_arg("--min-anchor-confirms",
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opt_set_uintval, opt_show_uintval, &anchor.min_confirms,
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"Number of anchor confirmations before channel is active");
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opt_register_arg("--anchor-fee=<bits>",
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opt_set_bits, opt_show_bits, &anchor.fee,
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"100's of satoshi to pay for anchor");
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opt_register_arg("--commitment-fee=<bits>",
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opt_set_bits, opt_show_bits, &commit_tx_fee,
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"100's of satoshi to pay for commitment");
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opt_register_arg("--locktime=<seconds>",
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opt_set_uintval, opt_show_uintval, &locktime_seconds,
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"Seconds to lock out our transaction redemption");
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opt_parse(&argc, argv, opt_log_stderr_exit);
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if (argc < 7)
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opt_usage_exit_fail("Expected 6 or more 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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anchor.total = atol(argv[2]);
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if (!anchor.total)
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errx(1, "Invalid total: must be > 0");
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if (!pubkey_from_hexstr(argv[3], &changekey))
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errx(1, "Invalid bitcoin pubkey '%s'", argv[3]);
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/* We don't really need the privkey here, but it's the most
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* convenient way to get the pubkey from bitcoind. */
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commitprivkey = key_from_base58(argv[4], strlen(argv[4]), &testnet,
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&commitkey);
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if (!commitprivkey)
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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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outprivkey = key_from_base58(argv[5], strlen(argv[5]), &testnet,
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&outkey);
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if (!outprivkey)
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errx(1, "Invalid private key '%s'", argv[5]);
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if (!testnet)
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errx(1, "Private key '%s' not on testnet!", argv[5]);
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anchor.n_inputs = (argc - 6);
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anchor.inputs = tal_arr(ctx, BitcoinInput *, anchor.n_inputs);
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anchor.pubkey = pubkey_to_proto(ctx, &commitkey);
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total_in = 0;
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for (i = 0; i < anchor.n_inputs; i++) {
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anchor.inputs[i] = parse_anchor_input(anchor.inputs, argv[i+6]);
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total_in += anchor.inputs[i]->amount;
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}
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if (total_in < anchor.total + anchor.fee)
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errx(1, "Only %llu satoshi in, and %llu out (+%llu fee)",
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(unsigned long long)total_in,
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(unsigned long long)anchor.total,
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(unsigned long long)anchor.fee);
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/* If there's change, say where to send it. */
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if (total_in != anchor.total + anchor.fee) {
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anchor.change = tal(ctx, Change);
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change__init(anchor.change);
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anchor.change->pubkey = pubkey_to_proto(anchor.change,
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&changekey);
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anchor.change->amount = total_in - (anchor.total + anchor.fee);
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}
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/* Get first revocation hash. */
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shachain_from_seed(&seed, 0, &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 = openchannel_pkt(ctx, weak_random64(), &revocation_hash, &outkey,
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commit_tx_fee, locktime_seconds, &anchor);
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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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