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core-lightning/channeld/test/run-commit_tx.c
Rusty Russell dffe2f516a signature: wrap almost all signatures in struct bitcoin_signature. 
This is prep work for when we sign htlc txs with
SIGHASH_SINGLE|SIGHASH_ANYONECANPAY.

We still deal with raw signatures for the htlc txs at the moment, since
we send them like that across the wire, and changing that was simply too
painful (for the moment?).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2018-12-06 23:11:51 +01:00

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#include <inttypes.h>
#include <stdio.h>
#include <common/type_to_string.h>
static bool print_superverbose;
#define SUPERVERBOSE(...) \
do { if (print_superverbose) printf(__VA_ARGS__); } while(0)
#define PRINT_ACTUAL_FEE
#include "../commit_tx.c"
#include <bitcoin/preimage.h>
#include <bitcoin/privkey.h>
#include <bitcoin/pubkey.h>
#include <ccan/array_size/array_size.h>
#include <ccan/err/err.h>
#include <ccan/str/hex/hex.h>
#include <common/key_derive.h>
#include <common/status.h>
/* Turn this on to brute-force fee values */
/*#define DEBUG */
/* AUTOGENERATED MOCKS START */
/* Generated stub for status_fmt */
void status_fmt(enum log_level level UNNEEDED, const char *fmt UNNEEDED, ...)
{ fprintf(stderr, "status_fmt called!\n"); abort(); }
/* AUTOGENERATED MOCKS END */
/* bitcoind loves its backwards txids! */
static struct bitcoin_txid txid_from_hex(const char *hex)
{
struct bitcoin_txid txid;
if (!bitcoin_txid_from_hex(hex, strlen(hex), &txid))
abort();
return txid;
}
static struct secret secret_from_hex(const char *hex)
{
struct secret s;
size_t len;
if (strstarts(hex, "0x"))
hex += 2;
len = strlen(hex);
/* BOLT #3:
*
* - Private keys are displayed as 32 bytes plus a trailing 1
* (Bitcoin's convention for "compressed" private keys, i.e. keys
* for which the public key is compressed).
*/
if (len == 66 && strends(hex, "01"))
len -= 2;
if (!hex_decode(hex, len, &s, sizeof(s)))
abort();
return s;
}
static void tx_must_be_eq(const struct bitcoin_tx *a,
const struct bitcoin_tx *b)
{
u8 *lina, *linb;
size_t i;
lina = linearize_tx(tmpctx, a);
linb = linearize_tx(tmpctx, b);
for (i = 0; i < tal_count(lina); i++) {
if (i >= tal_count(linb))
errx(1, "Second tx is truncated:\n"
"%s\n"
"%s",
tal_hex(tmpctx, lina),
tal_hex(tmpctx, linb));
if (lina[i] != linb[i])
errx(1, "tx differ at offset %zu:\n"
"%s\n"
"%s",
i,
tal_hex(tmpctx, lina),
tal_hex(tmpctx, linb));
}
if (i != tal_count(linb))
errx(1, "First tx is truncated:\n"
"%s\n"
"%s",
tal_hex(tmpctx, lina),
tal_hex(tmpctx, linb));
}
/* BOLT #3:
*
* htlc 0 direction: remote->local
* htlc 0 amount_msat: 1000000
* htlc 0 expiry: 500
* htlc 0 payment_preimage: 0000000000000000000000000000000000000000000000000000000000000000
* htlc 1 direction: remote->local
* htlc 1 amount_msat: 2000000
* htlc 1 expiry: 501
* htlc 1 payment_preimage: 0101010101010101010101010101010101010101010101010101010101010101
* htlc 2 direction: local->remote
* htlc 2 amount_msat: 2000000
* htlc 2 expiry: 502
* htlc 2 payment_preimage: 0202020202020202020202020202020202020202020202020202020202020202
* htlc 3 direction: local->remote
* htlc 3 amount_msat: 3000000
* htlc 3 expiry: 503
* htlc 3 payment_preimage: 0303030303030303030303030303030303030303030303030303030303030303
* htlc 4 direction: remote->local
* htlc 4 amount_msat: 4000000
* htlc 4 expiry: 504
* htlc 4 payment_preimage: 0404040404040404040404040404040404040404040404040404040404040404
*/
static const struct htlc **setup_htlcs(const tal_t *ctx)
{
const struct htlc **htlcs = tal_arr(ctx, const struct htlc *, 5);
int i;
for (i = 0; i < 5; i++) {
struct htlc *htlc = tal(htlcs, struct htlc);
htlc->id = i;
switch (i) {
case 0:
htlc->state = RCVD_ADD_ACK_REVOCATION;
htlc->msatoshi = 1000000;
break;
case 1:
htlc->state = RCVD_ADD_ACK_REVOCATION;
htlc->msatoshi = 2000000;
break;
case 2:
htlc->state = SENT_ADD_ACK_REVOCATION;
htlc->msatoshi = 2000000;
break;
case 3:
htlc->state = SENT_ADD_ACK_REVOCATION;
htlc->msatoshi = 3000000;
break;
case 4:
htlc->state = RCVD_ADD_ACK_REVOCATION;
htlc->msatoshi = 4000000;
break;
}
if (i == 0 || i == 1 || i == 4) {
/* direction: remote->local */
} else {
/* direction: local->remote */
htlc->state = SENT_ADD_ACK_REVOCATION;
}
htlc->expiry.locktime = 500 + i;
htlc->r = tal(htlc, struct preimage);
memset(htlc->r, i, sizeof(*htlc->r));
sha256(&htlc->rhash, htlc->r, sizeof(*htlc->r));
htlcs[i] = htlc;
}
return htlcs;
}
#if 0
static struct pubkey pubkey_from_hex(const char *hex)
{
struct pubkey pubkey;
if (strstarts(hex, "0x"))
hex += 2;
if (!pubkey_from_hexstr(hex, strlen(hex), &pubkey))
abort();
return pubkey;
}
#endif
static void report_htlcs(const struct bitcoin_tx *tx,
const struct htlc **htlc_map,
u16 to_self_delay,
const struct privkey *local_htlcsecretkey,
const struct pubkey *localkey,
const struct pubkey *local_htlckey,
const struct pubkey *local_delayedkey,
const struct privkey *x_remote_htlcsecretkey,
const struct pubkey *remotekey,
const struct pubkey *remote_htlckey,
const struct pubkey *remote_revocation_key,
u32 feerate_per_kw)
{
size_t i, n;
struct bitcoin_txid txid;
struct bitcoin_tx **htlc_tx;
struct bitcoin_signature *remotehtlcsig;
struct keyset keyset;
u8 **wscript;
htlc_tx = tal_arrz(tmpctx, struct bitcoin_tx *, tal_count(htlc_map));
remotehtlcsig = tal_arr(tmpctx, struct bitcoin_signature,
tal_count(htlc_map));
wscript = tal_arr(tmpctx, u8 *, tal_count(htlc_map));
bitcoin_txid(tx, &txid);
/* First report remote signatures, in order we would receive them. */
n = 0;
for (i = 0; i < tal_count(htlc_map); i++)
n += (htlc_map[i] != NULL);
printf("num_htlcs: %zu\n", n);
/* FIXME: naming here is kind of backwards: local revocation key
* is derived from remote revocation basepoint, but it's local */
keyset.self_revocation_key = *remote_revocation_key;
keyset.self_delayed_payment_key = *local_delayedkey;
keyset.self_payment_key = *localkey;
keyset.other_payment_key = *remotekey;
keyset.self_htlc_key = *local_htlckey;
keyset.other_htlc_key = *remote_htlckey;
for (i = 0; i < tal_count(htlc_map); i++) {
const struct htlc *htlc = htlc_map[i];
if (!htlc)
continue;
if (htlc_owner(htlc) == LOCAL) {
htlc_tx[i] = htlc_timeout_tx(htlc_tx, &txid, i,
htlc->msatoshi,
htlc->expiry.locktime,
to_self_delay,
feerate_per_kw,
&keyset);
wscript[i] = bitcoin_wscript_htlc_offer(tmpctx,
local_htlckey,
remote_htlckey,
&htlc->rhash,
remote_revocation_key);
} else {
htlc_tx[i] = htlc_success_tx(htlc_tx, &txid, i,
htlc->msatoshi,
to_self_delay,
feerate_per_kw,
&keyset);
wscript[i] = bitcoin_wscript_htlc_receive(tmpctx,
&htlc->expiry,
local_htlckey,
remote_htlckey,
&htlc->rhash,
remote_revocation_key);
}
sign_tx_input(htlc_tx[i], 0,
NULL,
wscript[i],
x_remote_htlcsecretkey, remote_htlckey,
SIGHASH_ALL,
&remotehtlcsig[i]);
printf("# signature for output %zi (htlc %"PRIu64")\n", i, htlc->id);
printf("remote_htlc_signature = %s\n",
type_to_string(tmpctx, struct bitcoin_signature,
&remotehtlcsig[i]));
}
/* For any HTLC outputs, produce htlc_tx */
for (i = 0; i < tal_count(htlc_map); i++) {
struct bitcoin_signature localhtlcsig;
const struct htlc *htlc = htlc_map[i];
if (!htlc)
continue;
sign_tx_input(htlc_tx[i], 0,
NULL,
wscript[i],
local_htlcsecretkey, local_htlckey,
SIGHASH_ALL,
&localhtlcsig);
printf("# local_signature = %s\n",
type_to_string(tmpctx, struct bitcoin_signature,
&localhtlcsig));
if (htlc_owner(htlc) == LOCAL) {
htlc_timeout_tx_add_witness(htlc_tx[i],
local_htlckey,
remote_htlckey,
&htlc->rhash,
remote_revocation_key,
&localhtlcsig,
&remotehtlcsig[i]);
} else {
htlc_success_tx_add_witness(htlc_tx[i],
&htlc->expiry,
local_htlckey,
remote_htlckey,
&localhtlcsig,
&remotehtlcsig[i],
htlc->r,
remote_revocation_key);
}
printf("output htlc_%s_tx %"PRIu64": %s\n",
htlc_owner(htlc) == LOCAL ? "timeout" : "success",
htlc->id,
tal_hex(tmpctx, linearize_tx(tmpctx, htlc_tx[i])));
}
}
static void report(struct bitcoin_tx *tx,
const u8 *wscript,
const struct privkey *x_remote_funding_privkey,
const struct pubkey *remote_funding_pubkey,
const struct privkey *local_funding_privkey,
const struct pubkey *local_funding_pubkey,
u16 to_self_delay,
const struct privkey *local_htlcsecretkey,
const struct pubkey *localkey,
const struct pubkey *local_htlckey,
const struct pubkey *local_delayedkey,
const struct privkey *x_remote_htlcsecretkey,
const struct pubkey *remotekey,
const struct pubkey *remote_htlckey,
const struct pubkey *remote_revocation_key,
u32 feerate_per_kw,
const struct htlc **htlc_map)
{
char *txhex;
struct bitcoin_signature localsig, remotesig;
sign_tx_input(tx, 0,
NULL,
wscript,
x_remote_funding_privkey, remote_funding_pubkey,
SIGHASH_ALL,
&remotesig);
printf("remote_signature = %s\n",
type_to_string(tmpctx, struct bitcoin_signature, &remotesig));
sign_tx_input(tx, 0,
NULL,
wscript,
local_funding_privkey, local_funding_pubkey,
SIGHASH_ALL,
&localsig);
printf("# local_signature = %s\n",
type_to_string(tmpctx, struct bitcoin_signature, &localsig));
tx->input[0].witness = bitcoin_witness_2of2(tx->input,
&localsig, &remotesig,
local_funding_pubkey,
remote_funding_pubkey);
txhex = tal_hex(tmpctx, linearize_tx(tx, tx));
printf("output commit_tx: %s\n", txhex);
report_htlcs(tx, htlc_map, to_self_delay,
local_htlcsecretkey, localkey, local_htlckey,
local_delayedkey,
x_remote_htlcsecretkey,
remotekey, remote_htlckey,
remote_revocation_key,
feerate_per_kw);
}
#ifdef DEBUG
static u64 calc_fee(const struct bitcoin_tx *tx, u64 input_satoshi)
{
size_t i;
u64 output_satoshi = 0;
for (i = 0; i < tal_count(tx->output); i++)
output_satoshi += tx->output[i].amount;
return input_satoshi - output_satoshi;
}
/* For debugging, we do brute-force increase to find thresholds */
static u32 increase(u32 feerate_per_kw)
{
return feerate_per_kw + 1;
}
#else
static u64 increase(u32 feerate_per_kw)
{
/* BOLT #3:
*
* local_feerate_per_kw: 0
* ...
* local_feerate_per_kw: 648
* ...
* local_feerate_per_kw: 2070
* ...
* local_feerate_per_kw: 2195
* ...
* local_feerate_per_kw: 3703
* ...
* local_feerate_per_kw: 4915
* ...
* local_feerate_per_kw: 9651181
*/
const u64 rates[] = { 0, 648, 2070, 2195, 3703, 4915, 9651181 };
size_t i;
for (i = 0; i < ARRAY_SIZE(rates) - 1; i++)
if (rates[i] == feerate_per_kw)
return rates[i+1];
abort();
}
#endif
/* HTLCs as seen from other side. */
static const struct htlc **invert_htlcs(const struct htlc **htlcs)
{
size_t i, n = tal_count(htlcs);
const struct htlc **inv = tal_arr(htlcs, const struct htlc *, n);
for (i = 0; i < n; i++) {
struct htlc *htlc;
inv[i] = htlc = tal_dup(inv, struct htlc, htlcs[i]);
if (inv[i]->state == RCVD_ADD_ACK_REVOCATION)
htlc->state = SENT_ADD_ACK_REVOCATION;
else {
assert(inv[i]->state == SENT_ADD_ACK_REVOCATION);
htlc->state = RCVD_ADD_ACK_REVOCATION;
}
}
return inv;
}
int main(void)
{
setup_locale();
struct bitcoin_txid funding_txid;
u64 funding_amount_satoshi, dust_limit_satoshi;
u32 feerate_per_kw;
u16 to_self_delay;
/* x_ prefix means internal vars we used to derive spec */
struct privkey local_funding_privkey, x_remote_funding_privkey;
struct secret x_local_payment_basepoint_secret, x_remote_payment_basepoint_secret;
struct secret x_local_htlc_basepoint_secret, x_remote_htlc_basepoint_secret;
struct secret x_local_per_commitment_secret;
struct secret x_local_delayed_payment_basepoint_secret;
struct secret x_remote_revocation_basepoint_secret;
struct privkey local_htlcsecretkey, x_remote_htlcsecretkey;
struct privkey x_local_delayed_secretkey;
struct pubkey local_funding_pubkey, remote_funding_pubkey;
struct pubkey local_payment_basepoint, remote_payment_basepoint;
struct pubkey local_htlc_basepoint, remote_htlc_basepoint;
struct pubkey x_local_delayed_payment_basepoint;
struct pubkey x_remote_revocation_basepoint;
struct pubkey x_local_per_commitment_point;
struct pubkey localkey, remotekey, tmpkey;
struct pubkey local_htlckey, remote_htlckey;
struct pubkey local_delayedkey;
struct pubkey remote_revocation_key;
struct bitcoin_tx *tx, *tx2;
struct keyset keyset;
u8 *wscript;
unsigned int funding_output_index;
u64 commitment_number, cn_obscurer, to_local_msat, to_remote_msat;
const struct htlc **htlcs, **htlc_map, **htlc_map2, **inv_htlcs;
secp256k1_ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY
| SECP256K1_CONTEXT_SIGN);
setup_tmpctx();
htlcs = setup_htlcs(tmpctx);
inv_htlcs = invert_htlcs(htlcs);
/* BOLT #3:
*
* # Appendix C: Commitment and HTLC Transaction Test Vectors
*
* In the following:
* - *local* transactions are considered, which implies that all
* payments to *local* are delayed.
* - It's assumed that *local* is the funder.
* - Private keys are displayed as 32 bytes plus a trailing 1
* (Bitcoin's convention for "compressed" private keys, i.e. keys for
* which the public key is compressed).
* - Transaction signatures are all deterministic, using RFC6979 (using
* HMAC-SHA256).
*
* To start, common basic parameters for each test vector are defined:
* the HTLCs are not used for the first "simple commitment tx with no
* HTLCs" test.
*
* funding_tx_id: 8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be
* funding_output_index: 0
* funding_amount_satoshi: 10000000
* commitment_number: 42
* local_delay: 144
* local_dust_limit_satoshi: 546
*/
funding_txid = txid_from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be");
funding_output_index = 0;
funding_amount_satoshi = 10000000;
commitment_number = 42;
to_self_delay = 144;
dust_limit_satoshi = 546;
#ifdef DEBUG
print_superverbose = true;
#endif
/* BOLT #3:
*
* <!-- The test vector values are derived, as per Key Derivation,
* though it's not required for this test. They're included here
* for completeness and in case someone wants to reproduce the
* test vectors themselves:
*
* INTERNAL: remote_funding_privkey: 1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e130101
* INTERNAL: local_payment_basepoint_secret: 111111111111111111111111111111111111111111111111111111111111111101
* INTERNAL: remote_revocation_basepoint_secret: 222222222222222222222222222222222222222222222222222222222222222201
* INTERNAL: local_delayed_payment_basepoint_secret: 333333333333333333333333333333333333333333333333333333333333333301
* INTERNAL: remote_payment_basepoint_secret: 444444444444444444444444444444444444444444444444444444444444444401
* x_local_per_commitment_secret: 1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a0908070605040302010001
* # From remote_revocation_basepoint_secret
* INTERNAL: remote_revocation_basepoint: 02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27
* # From local_delayed_payment_basepoint_secret
* INTERNAL: local_delayed_payment_basepoint: 023c72addb4fdf09af94f0c94d7fe92a386a7e70cf8a1d85916386bb2535c7b1b1
* INTERNAL: local_per_commitment_point: 025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486
* INTERNAL: remote_privkey: 8deba327a7cc6d638ab0eb025770400a6184afcba6713c210d8d10e199ff2fda01
* # From local_delayed_payment_basepoint_secret, local_per_commitment_point and local_delayed_payment_basepoint
* INTERNAL: local_delayed_privkey: adf3464ce9c2f230fd2582fda4c6965e4993ca5524e8c9580e3df0cf226981ad01
*/
local_funding_privkey.secret = secret_from_hex("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f374901");
x_remote_funding_privkey.secret = secret_from_hex("1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e1301");
SUPERVERBOSE("INTERNAL: remote_funding_privkey: %s01\n",
type_to_string(tmpctx, struct privkey,
&x_remote_funding_privkey));
x_local_payment_basepoint_secret = secret_from_hex("1111111111111111111111111111111111111111111111111111111111111111");
SUPERVERBOSE("INTERNAL: local_payment_basepoint_secret: %s\n",
type_to_string(tmpctx, struct secret,
&x_local_payment_basepoint_secret));
x_remote_revocation_basepoint_secret = secret_from_hex("2222222222222222222222222222222222222222222222222222222222222222");
SUPERVERBOSE("INTERNAL: remote_revocation_basepoint_secret: %s\n",
type_to_string(tmpctx, struct secret,
&x_remote_revocation_basepoint_secret));
x_local_delayed_payment_basepoint_secret = secret_from_hex("3333333333333333333333333333333333333333333333333333333333333333");
SUPERVERBOSE("INTERNAL: local_delayed_payment_basepoint_secret: %s\n",
type_to_string(tmpctx, struct secret,
&x_local_delayed_payment_basepoint_secret));
x_remote_payment_basepoint_secret = secret_from_hex("4444444444444444444444444444444444444444444444444444444444444444");
SUPERVERBOSE("INTERNAL: remote_payment_basepoint_secret: %s\n",
type_to_string(tmpctx, struct secret,
&x_remote_payment_basepoint_secret));
x_local_per_commitment_secret = secret_from_hex("0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100");
SUPERVERBOSE("x_local_per_commitment_secret: %s\n",
type_to_string(tmpctx, struct secret,
&x_local_per_commitment_secret));
if (!pubkey_from_secret(&x_remote_revocation_basepoint_secret,
&x_remote_revocation_basepoint))
abort();
SUPERVERBOSE("# From remote_revocation_basepoint_secret\n"
"INTERNAL: remote_revocation_basepoint: %s\n",
type_to_string(tmpctx, struct pubkey,
&x_remote_revocation_basepoint));
if (!pubkey_from_secret(&x_local_delayed_payment_basepoint_secret,
&x_local_delayed_payment_basepoint))
abort();
SUPERVERBOSE("# From local_delayed_payment_basepoint_secret\n"
"INTERNAL: local_delayed_payment_basepoint: %s\n",
type_to_string(tmpctx, struct pubkey,
&x_local_delayed_payment_basepoint));
if (!pubkey_from_secret(&x_local_per_commitment_secret,
&x_local_per_commitment_point))
abort();
SUPERVERBOSE("INTERNAL: local_per_commitment_point: %s\n",
type_to_string(tmpctx, struct pubkey,
&x_local_per_commitment_point));
if (!pubkey_from_secret(&x_local_payment_basepoint_secret,
&local_payment_basepoint))
abort();
if (!pubkey_from_secret(&x_remote_payment_basepoint_secret,
&remote_payment_basepoint))
abort();
/* FIXME: BOLT should include separate HTLC keys */
local_htlc_basepoint = local_payment_basepoint;
remote_htlc_basepoint = remote_payment_basepoint;
x_local_htlc_basepoint_secret = x_local_payment_basepoint_secret;
x_remote_htlc_basepoint_secret = x_remote_payment_basepoint_secret;
if (!derive_simple_privkey(&x_remote_htlc_basepoint_secret,
&remote_htlc_basepoint,
&x_local_per_commitment_point,
&x_remote_htlcsecretkey))
abort();
SUPERVERBOSE("INTERNAL: remote_secretkey: %s\n",
type_to_string(tmpctx, struct privkey, &x_remote_htlcsecretkey));
if (!derive_simple_privkey(&x_local_delayed_payment_basepoint_secret,
&x_local_delayed_payment_basepoint,
&x_local_per_commitment_point,
&x_local_delayed_secretkey))
abort();
SUPERVERBOSE("# From local_delayed_payment_basepoint_secret, local_per_commitment_point and local_delayed_payment_basepoint\n"
"INTERNAL: local_delayed_secretkey: %s\n",
type_to_string(tmpctx, struct privkey,
&x_local_delayed_secretkey));
/* These two needed to calculate obscuring factor */
printf("local_payment_basepoint: %s\n",
type_to_string(tmpctx, struct pubkey, &local_payment_basepoint));
printf("remote_payment_basepoint: %s\n",
type_to_string(tmpctx, struct pubkey,&remote_payment_basepoint));
cn_obscurer = commit_number_obscurer(&local_payment_basepoint,
&remote_payment_basepoint);
printf("# obscured commitment transaction number = 0x%"PRIx64" ^ %"PRIu64"\n",
cn_obscurer, commitment_number);
printf("local_funding_privkey: %s01\n",
type_to_string(tmpctx, struct privkey, &local_funding_privkey));
if (!pubkey_from_privkey(&local_funding_privkey, &local_funding_pubkey))
abort();
printf("local_funding_pubkey: %s\n",
type_to_string(tmpctx, struct pubkey, &local_funding_pubkey));
if (!pubkey_from_privkey(&x_remote_funding_privkey, &remote_funding_pubkey))
abort();
printf("remote_funding_pubkey: %s\n",
type_to_string(tmpctx, struct pubkey, &remote_funding_pubkey));
if (!derive_simple_privkey(&x_local_htlc_basepoint_secret,
&local_payment_basepoint,
&x_local_per_commitment_point,
&local_htlcsecretkey))
abort();
printf("local_secretkey: %s\n",
type_to_string(tmpctx, struct privkey, &local_htlcsecretkey));
if (!derive_simple_key(&local_payment_basepoint,
&x_local_per_commitment_point,
&localkey))
abort();
printf("localkey: %s\n",
type_to_string(tmpctx, struct pubkey, &localkey));
if (!derive_simple_key(&remote_payment_basepoint,
&x_local_per_commitment_point,
&remotekey))
abort();
printf("remotekey: %s\n",
type_to_string(tmpctx, struct pubkey, &remotekey));
if (!pubkey_from_privkey(&local_htlcsecretkey, &local_htlckey))
abort();
if (!derive_simple_key(&local_htlc_basepoint,
&x_local_per_commitment_point,
&tmpkey))
abort();
assert(pubkey_eq(&tmpkey, &local_htlckey));
printf("local_htlckey: %s\n",
type_to_string(tmpctx, struct pubkey, &local_htlckey));
if (!derive_simple_key(&remote_htlc_basepoint,
&x_local_per_commitment_point,
&remote_htlckey))
abort();
printf("remote_htlckey: %s\n",
type_to_string(tmpctx, struct pubkey, &remote_htlckey));
if (!pubkey_from_privkey(&x_local_delayed_secretkey, &local_delayedkey))
abort();
if (!derive_simple_key(&x_local_delayed_payment_basepoint,
&x_local_per_commitment_point,
&tmpkey))
abort();
assert(pubkey_eq(&tmpkey, &local_delayedkey));
printf("local_delayedkey: %s\n",
type_to_string(tmpctx, struct pubkey, &local_delayedkey));
if (!derive_revocation_key(&x_remote_revocation_basepoint,
&x_local_per_commitment_point,
&remote_revocation_key))
abort();
printf("remote_revocation_key: %s\n",
type_to_string(tmpctx, struct pubkey, &remote_revocation_key));
wscript = bitcoin_redeem_2of2(tmpctx, &local_funding_pubkey,
&remote_funding_pubkey);
printf("# funding wscript = %s\n", tal_hex(tmpctx, wscript));
/* BOLT #3:
*
* name: simple commitment tx with no HTLCs
* to_local_msat: 7000000000
* to_remote_msat: 3000000000
* local_feerate_per_kw: 15000
*/
to_local_msat = 7000000000;
to_remote_msat = 3000000000;
feerate_per_kw = 15000;
printf("\n"
"name: simple commitment tx with no HTLCs\n"
"to_local_msat: %"PRIu64"\n"
"to_remote_msat: %"PRIu64"\n"
"local_feerate_per_kw: %u\n",
to_local_msat, to_remote_msat, feerate_per_kw);
keyset.self_revocation_key = remote_revocation_key;
keyset.self_delayed_payment_key = local_delayedkey;
keyset.self_payment_key = localkey;
keyset.other_payment_key = remotekey;
keyset.self_htlc_key = local_htlckey;
keyset.other_htlc_key = remote_htlckey;
print_superverbose = true;
tx = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
LOCAL, to_self_delay,
&keyset,
feerate_per_kw,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
NULL, &htlc_map, commitment_number ^ cn_obscurer,
LOCAL);
print_superverbose = false;
tx2 = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
REMOTE, to_self_delay,
&keyset,
feerate_per_kw,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
NULL, &htlc_map2, commitment_number ^ cn_obscurer,
REMOTE);
tx_must_be_eq(tx, tx2);
report(tx, wscript, &x_remote_funding_privkey, &remote_funding_pubkey,
&local_funding_privkey, &local_funding_pubkey,
to_self_delay,
&local_htlcsecretkey,
&localkey,
&local_htlckey,
&local_delayedkey,
&x_remote_htlcsecretkey,
&remotekey,
&remote_htlckey,
&remote_revocation_key,
feerate_per_kw,
htlc_map);
/* BOLT #3:
*
* name: commitment tx with all five HTLCs untrimmed (minimum feerate)
* to_local_msat: 6988000000
* to_remote_msat: 3000000000
* local_feerate_per_kw: 0
*/
to_local_msat = 6988000000;
to_remote_msat = 3000000000;
feerate_per_kw = 0;
printf("\n"
"name: commitment tx with all 5 htlcs untrimmed (minimum feerate)\n"
"to_local_msat: %"PRIu64"\n"
"to_remote_msat: %"PRIu64"\n"
"local_feerate_per_kw: %u\n",
to_local_msat, to_remote_msat, feerate_per_kw);
print_superverbose = true;
tx = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
LOCAL, to_self_delay,
&keyset,
feerate_per_kw,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
htlcs, &htlc_map, commitment_number ^ cn_obscurer,
LOCAL);
print_superverbose = false;
tx2 = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
REMOTE, to_self_delay,
&keyset,
feerate_per_kw,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
inv_htlcs, &htlc_map2,
commitment_number ^ cn_obscurer,
REMOTE);
tx_must_be_eq(tx, tx2);
report(tx, wscript, &x_remote_funding_privkey, &remote_funding_pubkey,
&local_funding_privkey, &local_funding_pubkey,
to_self_delay,
&local_htlcsecretkey,
&localkey,
&local_htlckey,
&local_delayedkey,
&x_remote_htlcsecretkey,
&remotekey,
&remote_htlckey,
&remote_revocation_key,
feerate_per_kw,
htlc_map);
do {
struct bitcoin_tx *newtx;
feerate_per_kw = increase(feerate_per_kw);
print_superverbose = false;
newtx = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
LOCAL, to_self_delay,
&keyset,
feerate_per_kw,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
htlcs, &htlc_map,
commitment_number ^ cn_obscurer,
LOCAL);
/* This is what it would look like for peer generating it! */
tx2 = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
REMOTE, to_self_delay,
&keyset,
feerate_per_kw,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
inv_htlcs, &htlc_map2,
commitment_number ^ cn_obscurer,
REMOTE);
tx_must_be_eq(newtx, tx2);
#ifdef DEBUG
if (feerate_per_kw % 100000 == 0)
printf("feerate_per_kw = %u, fees = %"PRIu64"\n",
feerate_per_kw, calc_fee(newtx, funding_amount_satoshi));
if (tal_count(newtx->output) == tal_count(tx->output)) {
tal_free(newtx);
continue;
}
#endif
printf("\n"
"name: commitment tx with %zu output%s untrimmed (maximum feerate)\n"
"to_local_msat: %"PRIu64"\n"
"to_remote_msat: %"PRIu64"\n"
"local_feerate_per_kw: %u\n",
tal_count(tx->output),
tal_count(tx->output) > 1 ? "s" : "",
to_local_msat, to_remote_msat, feerate_per_kw-1);
/* Recalc with verbosity on */
print_superverbose = true;
tx = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
LOCAL, to_self_delay,
&keyset,
feerate_per_kw-1,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
htlcs, &htlc_map,
commitment_number ^ cn_obscurer,
LOCAL);
report(tx, wscript,
&x_remote_funding_privkey, &remote_funding_pubkey,
&local_funding_privkey, &local_funding_pubkey,
to_self_delay,
&local_htlcsecretkey,
&localkey,
&local_htlckey,
&local_delayedkey,
&x_remote_htlcsecretkey,
&remotekey,
&remote_htlckey,
&remote_revocation_key,
feerate_per_kw-1,
htlc_map);
printf("\n"
"name: commitment tx with %zu output%s untrimmed (minimum feerate)\n"
"to_local_msat: %"PRIu64"\n"
"to_remote_msat: %"PRIu64"\n"
"local_feerate_per_kw: %u\n",
tal_count(newtx->output),
tal_count(newtx->output) > 1 ? "s" : "",
to_local_msat, to_remote_msat, feerate_per_kw);
/* Recalc with verbosity on */
print_superverbose = true;
newtx = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
LOCAL, to_self_delay,
&keyset,
feerate_per_kw,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
htlcs, &htlc_map,
commitment_number ^ cn_obscurer,
LOCAL);
report(newtx, wscript,
&x_remote_funding_privkey, &remote_funding_pubkey,
&local_funding_privkey, &local_funding_pubkey,
to_self_delay,
&local_htlcsecretkey,
&localkey,
&local_htlckey,
&local_delayedkey,
&x_remote_htlcsecretkey,
&remotekey,
&remote_htlckey,
&remote_revocation_key,
feerate_per_kw,
htlc_map);
assert(tal_count(newtx->output) != tal_count(tx->output));
tal_free(tx);
tx = newtx;
} while (tal_count(tx->output) > 1);
/* Now make sure we cover case where funder can't afford the fee;
* its output cannot go negative! */
for (;;) {
u64 base_fee_msat = commit_tx_base_fee(feerate_per_kw, 0)
* 1000;
if (base_fee_msat <= to_local_msat) {
feerate_per_kw++;
continue;
}
/* BOLT #3:
*
* name: commitment tx with fee greater than funder amount
* to_local_msat: 6988000000
* to_remote_msat: 3000000000
* local_feerate_per_kw: 9651936
*/
assert(feerate_per_kw == 9651936);
printf("\n"
"name: commitment tx with fee greater than funder amount\n"
"to_local_msat: %"PRIu64"\n"
"to_remote_msat: %"PRIu64"\n"
"local_feerate_per_kw: %u\n",
to_local_msat, to_remote_msat, feerate_per_kw);
tx = commit_tx(tmpctx, &funding_txid, funding_output_index,
funding_amount_satoshi,
LOCAL, to_self_delay,
&keyset,
feerate_per_kw,
dust_limit_satoshi,
to_local_msat,
to_remote_msat,
htlcs, &htlc_map,
commitment_number ^ cn_obscurer,
LOCAL);
report(tx, wscript,
&x_remote_funding_privkey, &remote_funding_pubkey,
&local_funding_privkey, &local_funding_pubkey,
to_self_delay,
&local_htlcsecretkey,
&localkey,
&local_htlckey,
&local_delayedkey,
&x_remote_htlcsecretkey,
&remotekey,
&remote_htlckey,
&remote_revocation_key,
feerate_per_kw,
htlc_map);
break;
}
/* No memory leaks please */
secp256k1_context_destroy(secp256k1_ctx);
tal_free(tmpctx);
/* FIXME: Do BOLT comparison! */
return 0;
}
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