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mkgossip.c
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/* For example, in the spec tests we use the following channels:
*
* lightning/devtools/mkgossip 103x1x0 06226e46111a0b59caaf126043eb5bbf28c34f3a5e332a1fc7b2b73cf188910f 0000000000000000000000000000000000000000000000000000000000000002 0000000000000000000000000000000000000000000000000000000000000003 0000000000000000000000000000000000000000000000000000000000000010 0000000000000000000000000000000000000000000000000000000000000020 "" 1565587763 144 0 1000 10 "" "01080808082607" 1565587763 48 0 100 11 100000 "0151b6887026070220014c4e1cc141001e6f65fffec8a825260703c43068ceb641d7b25c3a26070441cf248da2034dfa9351a9e946d71ce86f561f50b67753fd8e385d44647bf62cdb91032607"
*
* lightning/devtools/mkgossip 109x1x0 06226e46111a0b59caaf126043eb5bbf28c34f3a5e332a1fc7b2b73cf188910f 0000000000000000000000000000000000000000000000000000000000000004 0000000000000000000000000000000000000000000000000000000000000005 0000000000000000000000000000000000000000000000000000000000000030 0000000000000000000000000000000000000000000000000000000000000040 "" 1565587764 144 0 1000 10 "" "" 1565587765 48 0 100 11 100000 022a03b0c0000300d000000000240020012607
*
* lightning/devtools/mkgossip 115x1x0 06226e46111a0b59caaf126043eb5bbf28c34f3a5e332a1fc7b2b73cf188910f 0000000000000000000000000000000000000000000000000000000000000003 0000000000000000000000000000000000000000000000000000000000000004 0000000000000000000000000000000000000000000000000000000000000050 0000000000000000000000000000000000000000000000000000000000000060 "" 1565597764 144 0 1000 10 "" "0441cf248da2034dfa9351a9e946d71ce86f561f50b67753fd8e385d44647bf62cdb91032607" 1565597765 48 0 100 11 100000 ""
*/
#include "config.h"
#include <assert.h>
#include <ccan/crc32c/crc32c.h>
#include <ccan/err/err.h>
#include <ccan/opt/opt.h>
#include <ccan/str/hex/hex.h>
#include <ccan/tal/str/str.h>
#include <common/type_to_string.h>
#include <inttypes.h>
#include <stdio.h>
#include <wire/peer_wire.h>
static bool verbose = false;
struct update_opts {
u32 timestamp;
u32 cltv_expiry_delta;
struct amount_msat min;
struct amount_msat feebase;
u32 fee_proportional_millionths;
struct amount_msat *max;
u8 *addresses;
};
static int parse_options(char *argv[], struct update_opts *opts,
const char *desc)
{
int argnum = 0;
opts->timestamp = atol(argv[argnum++]);
if (!opts->timestamp)
errx(1, "Bad %s.timestamp", desc);
opts->cltv_expiry_delta = atol(argv[argnum++]);
if (!opts->cltv_expiry_delta)
errx(1, "Bad %s.cltv_expiry_delta", desc);
if (!parse_amount_msat(&opts->min, argv[argnum], strlen(argv[argnum])))
errx(1, "Bad %s.min", desc);
argnum++;
if (!parse_amount_msat(&opts->feebase,
argv[argnum], strlen(argv[argnum])))
errx(1, "Bad %s.feebase", desc);
argnum++;
opts->fee_proportional_millionths = atol(argv[argnum++]);
if (!opts->fee_proportional_millionths)
errx(1, "Bad %s.fee_proportional_millionths", desc);
if (streq(argv[argnum], ""))
opts->max = NULL;
else {
opts->max = tal(NULL, struct amount_msat);
if (!parse_amount_msat(opts->max,
argv[argnum], strlen(argv[argnum])))
errx(1, "Bad %s.max", desc);
}
argnum++;
opts->addresses = tal_hexdata(NULL, argv[argnum], strlen(argv[argnum]));
if (!opts->addresses)
errx(1, "Bad %s.addresses", desc);
argnum++;
return argnum;
}
static char *sig_as_hex(const secp256k1_ecdsa_signature *sig)
{
u8 compact_sig[64];
secp256k1_ecdsa_signature_serialize_compact(secp256k1_ctx,
compact_sig,
sig);
return tal_hexstr(NULL, compact_sig, sizeof(compact_sig));
}
static char *sig_notation(const struct privkey *privkey,
struct sha256_double *hash,
const secp256k1_ecdsa_signature *sig)
{
const char *pstr = tal_hexstr(NULL, privkey->secret.data,
sizeof(privkey->secret.data));
const char *hstr =
type_to_string(NULL, struct sha256_double, hash);
if (verbose)
return tal_fmt(NULL,
"SIG(%s:%s)\n"
" -- privkey= %s\n"
" -- tx_hash= %s\n"
" -- computed_sig= %s",
pstr, hstr, pstr, hstr, sig_as_hex(sig));
return tal_fmt(NULL, "SIG(%s:%s)", pstr, hstr);
}
/* BOLT #7:
*
* The checksum of a `channel_update` is the CRC32C checksum as specified in
* [RFC3720](https://tools.ietf.org/html/rfc3720#appendix-B.4) of this
* `channel_update` without its `signature` and `timestamp` fields.
*/
static u32 crc32_of_update(const u8 *channel_update)
{
u32 sum;
/* BOLT #7:
*
* 1. type: 258 (`channel_update`)
* 2. data:
* * [`signature`:`signature`]
* * [`chain_hash`:`chain_hash`]
* * [`short_channel_id`:`short_channel_id`]
* * [`u32`:`timestamp`]
*...
*/
/* We already checked it's valid before accepting */
assert(tal_count(channel_update) > 2 + 64 + 32 + 8 + 4);
sum = crc32c(0, channel_update + 2 + 64, 32 + 8);
sum = crc32c(sum, channel_update + 2 + 64 + 32 + 8 + 4,
tal_count(channel_update) - (64 + 2 + 32 + 8 + 4));
return sum;
}
static void print_update(const struct bitcoin_blkid *chainhash,
const struct short_channel_id *scid,
const struct update_opts *opts,
bool is_lesser_key,
const struct privkey *privkey)
{
/* 2 bytes msg type + 64 bytes of signature */
const size_t channel_update_offset = 2 + 64;
struct sha256_double hash;
secp256k1_ecdsa_signature sig;
u8 *cupdate;
memset(&sig, 0, sizeof(sig));
if (opts->max) {
cupdate = towire_channel_update_option_channel_htlc_max
(NULL, &sig, chainhash, scid, opts->timestamp,
ROUTING_OPT_HTLC_MAX_MSAT,
is_lesser_key ? 0 : ROUTING_FLAGS_DIRECTION,
opts->cltv_expiry_delta,
opts->min,
opts->feebase.millisatoshis, /* Raw: devtools code */
opts->fee_proportional_millionths,
*opts->max);
} else {
cupdate = towire_channel_update
(NULL, &sig, chainhash, scid, opts->timestamp,
0,
is_lesser_key ? 0 : ROUTING_FLAGS_DIRECTION,
opts->cltv_expiry_delta,
opts->min,
opts->feebase.millisatoshis, /* Raw: devtools code */
opts->fee_proportional_millionths);
}
sha256_double(&hash, cupdate + channel_update_offset,
tal_count(cupdate) - channel_update_offset);
sign_hash(privkey, &hash, &sig);
printf("type=channel_update\n");
printf(" signature=%s\n", sig_notation(privkey, &hash, &sig));
printf(" chain_hash=%s\n", tal_hexstr(NULL, chainhash, sizeof(*chainhash)));
printf(" short_channel_id=%s\n", short_channel_id_to_str(NULL, scid));
printf(" timestamp=%u\n", opts->timestamp);
printf(" message_flags=%u\n",
opts->max ? ROUTING_OPT_HTLC_MAX_MSAT : 0);
printf(" channel_flags=%u\n",
is_lesser_key ? 0 : ROUTING_FLAGS_DIRECTION);
printf(" cltv_expiry_delta=%u\n",
opts->cltv_expiry_delta);
printf(" htlc_minimum_msat=%"PRIu64"\n",
opts->min.millisatoshis); /* Raw: devtools code */
printf(" fee_base_msat=%"PRIu64"\n",
opts->feebase.millisatoshis); /* Raw: devtools code */
printf(" fee_proportional_millionths=%u\n",
opts->fee_proportional_millionths);
if (opts->max)
printf(" htlc_maximum_msat=%"PRIu64"\n",
opts->max->millisatoshis); /* Raw: devtools code */
printf("# crc32c checksum: %08x\n", crc32_of_update(cupdate));
}
static void print_nannounce(const struct node_id *nodeid,
const struct update_opts *opts,
const struct privkey *privkey)
{
/* 2 bytes msg type + 64 bytes of signature */
const size_t node_announcement_offset = 2 + 64;
struct sha256_double hash;
secp256k1_ecdsa_signature sig;
char alias[33];
struct tlv_node_ann_tlvs *tlvs;
u8 *nannounce;
memset(&sig, 0, sizeof(sig));
assert(hex_str_size(sizeof(*nodeid)) >= sizeof(alias));
hex_encode(nodeid, hex_data_size(sizeof(alias)), alias, sizeof(alias));
tlvs = tlv_node_ann_tlvs_new(NULL);
nannounce = towire_node_announcement(NULL, &sig, NULL, opts->timestamp,
nodeid, nodeid->k, (u8 *)alias,
opts->addresses,
tlvs);
sha256_double(&hash, nannounce + node_announcement_offset,
tal_count(nannounce) - node_announcement_offset);
sign_hash(privkey, &hash, &sig);
printf("type=node_announcement\n");
printf(" signature=%s\n", sig_notation(privkey, &hash, &sig));
printf(" features=%s\n", tal_hex(NULL, NULL));
printf(" timestamp=%u\n", opts->timestamp);
printf(" node_id=%s\n", node_id_to_hexstr(NULL, nodeid));
printf(" rgb_color=%s\n", tal_hexstr(NULL, nodeid->k, 3));
printf(" alias=%s\n", tal_hexstr(NULL, alias, 32));
printf(" addresses=%s\n", tal_hex(NULL, opts->addresses));
if (tlvs->option_will_fund) {
struct lease_rates *rates = tlvs->option_will_fund;
printf(" TLV option_will_fund\n");
printf(" lease_fee_basis=%d\n",
rates->lease_fee_basis);
printf(" lease_fee_base_sat=%d\n",
rates->lease_fee_base_sat);
printf(" funding_weight=%d\n",
rates->funding_weight);
printf(" channel_fee_max_proportional_thousandths=%d\n",
rates->channel_fee_max_proportional_thousandths);
printf(" channel_fee_max_base_msat=%d\n",
rates->channel_fee_max_base_msat);
}
tal_free(tlvs);
}
int main(int argc, char *argv[])
{
struct privkey node_privkey[2], funding_privkey[2];
struct pubkey node[2], bitcoin[2];
struct node_id nodeid[2];
int lesser_key;
struct short_channel_id scid;
struct bitcoin_blkid chainhash;
secp256k1_ecdsa_signature nodesig[2], bitcoinsig[2];
const u8 *features;
u8 *cannounce;
/* 2 bytes msg type + 256 bytes of signatures */
const size_t channel_announcement_offset = 2 + 256;
int argnum;
struct sha256_double hash;
struct update_opts opts[2];
setup_locale();
secp256k1_ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY |
SECP256K1_CONTEXT_SIGN);
if (argc < 8 + 7 * 2)
errx(1, "Usage: mkgossip <scid> <chainhash> <node-privkey1> <node-privkey2> <node1-funding-privkey> <node2-funding-privkey> <features-hex> update-opts-1 update-opts-2\n"
"Where <update-opts> is:\n"
" <timestamp>\n"
" <cltv_expiry_delta>\n"
" <htlc_minimum_msat>\n"
" <fee_base_msat>\n"
" <fee_proportional_millionths>\n"
" <htlc_maximum_msat-or-empty>\n"
" <hex-addrstr>");
opt_register_noarg("-v|--verbose", opt_set_bool, &verbose,
"Increase verbosity");
opt_parse(&argc, argv, opt_log_stderr_exit);
argnum = 1;
if (!short_channel_id_from_str(argv[argnum], strlen(argv[argnum]), &scid))
errx(1, "Bad scid");
argnum++;
/* Don't do endian-reversing insanity here! */
if (!hex_decode(argv[argnum], strlen(argv[argnum]),
&chainhash, sizeof(chainhash)))
errx(1, "Parsing chainhash");
argnum++;
if (!hex_decode(argv[argnum], strlen(argv[argnum]),
&node_privkey[0], sizeof(node_privkey[0])))
errx(1, "Parsing node-privkey1");
argnum++;
if (!hex_decode(argv[argnum], strlen(argv[argnum]),
&node_privkey[1], sizeof(node_privkey[2])))
errx(1, "Parsing node-privkey2");
argnum++;
if (!hex_decode(argv[argnum], strlen(argv[argnum]),
&funding_privkey[0], sizeof(funding_privkey[0])))
errx(1, "Parsing funding-privkey1");
argnum++;
if (!hex_decode(argv[argnum], strlen(argv[argnum]),
&funding_privkey[1], sizeof(funding_privkey[2])))
errx(1, "Parsing funding-privkey2");
argnum++;
features = tal_hexdata(NULL, argv[argnum], strlen(argv[argnum]));
if (!features)
errx(1, "Parsing hexfeatures");
argnum++;
argnum += parse_options(argv + argnum, &opts[0], "update-opts1");
argnum += parse_options(argv + argnum, &opts[1], "update-opts2");
if (!pubkey_from_privkey(&node_privkey[0], &node[0])
|| !pubkey_from_privkey(&node_privkey[1], &node[1])
|| !pubkey_from_privkey(&funding_privkey[0], &bitcoin[0])
|| !pubkey_from_privkey(&funding_privkey[1], &bitcoin[1]))
errx(1, "Bad privkeys");
lesser_key = pubkey_idx(&node[0], &node[1]);
node_id_from_pubkey(&nodeid[0], &node[0]);
node_id_from_pubkey(&nodeid[1], &node[1]);
/* First make msg with dummy sigs. */
memset(nodesig, 0, sizeof(nodesig));
memset(bitcoinsig, 0, sizeof(bitcoinsig));
cannounce = towire_channel_announcement(NULL,
&nodesig[lesser_key],
&nodesig[!lesser_key],
&bitcoinsig[lesser_key],
&bitcoinsig[!lesser_key],
features, &chainhash,
&scid,
&nodeid[lesser_key],
&nodeid[!lesser_key],
&bitcoin[lesser_key],
&bitcoin[!lesser_key]);
sha256_double(&hash, cannounce + channel_announcement_offset,
tal_count(cannounce) - channel_announcement_offset);
sign_hash(&node_privkey[0], &hash, &nodesig[0]);
sign_hash(&funding_privkey[0], &hash, &bitcoinsig[0]);
sign_hash(&node_privkey[1], &hash, &nodesig[1]);
sign_hash(&funding_privkey[1], &hash, &bitcoinsig[1]);
printf("type=channel_announcement\n");
printf(" node_signature_1=%s\n",
sig_notation(&node_privkey[lesser_key], &hash, &nodesig[lesser_key]));
printf(" node_signature_2=%s\n",
sig_notation(&node_privkey[!lesser_key], &hash, &nodesig[!lesser_key]));
printf(" bitcoin_signature_1=%s\n",
sig_notation(&funding_privkey[lesser_key], &hash, &bitcoinsig[lesser_key]));
printf(" bitcoin_signature_2=%s\n",
sig_notation(&funding_privkey[!lesser_key], &hash, &bitcoinsig[!lesser_key]));
printf(" features=%s\n", tal_hex(NULL, features));
printf(" chain_hash=%s\n", tal_hexstr(NULL, &chainhash, sizeof(chainhash)));
printf(" short_channel_id=%s\n", short_channel_id_to_str(NULL, &scid));
printf(" node_id_1=%s\n",
node_id_to_hexstr(NULL, &nodeid[lesser_key]));
printf(" node_id_2=%s\n",
node_id_to_hexstr(NULL, &nodeid[!lesser_key]));
printf(" bitcoin_key_1=%s\n",
pubkey_to_hexstr(NULL, &bitcoin[lesser_key]));
printf(" bitcoin_key_2=%s\n",
pubkey_to_hexstr(NULL, &bitcoin[!lesser_key]));
printf("\n#Node 1:\n");
print_update(&chainhash, &scid, &opts[0], lesser_key == 0,
&node_privkey[0]);
print_nannounce(&nodeid[0], &opts[0], &node_privkey[0]);
printf("\n#Node 2:\n");
print_update(&chainhash, &scid, &opts[1], lesser_key == 1,
&node_privkey[1]);
print_nannounce(&nodeid[1], &opts[1], &node_privkey[1]);
return 0;
}