mirror of
https://github.com/ElementsProject/lightning.git
synced 2025-03-15 11:59:16 +01:00
bitcoin: implement bitcoin_tx_2of2_input_witness_weight
Saves us actually creating the witness to measure it. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
Christian Decker
parent
169c113d15
commit
c88dc7883e
3 changed files with 170 additions and 0 deletions
157
bitcoin/test/run-tx-bitcoin_tx_2of2_input_witness_weight.c
Normal file
157
bitcoin/test/run-tx-bitcoin_tx_2of2_input_witness_weight.c
Normal file
|
|
@ -0,0 +1,157 @@
|
|||
#include "config.h"
|
||||
#include <assert.h>
|
||||
#include <bitcoin/privkey.c>
|
||||
#include <bitcoin/pubkey.c>
|
||||
#include <bitcoin/script.c>
|
||||
#include <bitcoin/shadouble.c>
|
||||
#include <bitcoin/signature.c>
|
||||
#include <bitcoin/tx.c>
|
||||
#include <bitcoin/varint.c>
|
||||
#include <ccan/str/hex/hex.h>
|
||||
#include <common/setup.h>
|
||||
#include <common/utils.h>
|
||||
#include <stdio.h>
|
||||
|
||||
/* AUTOGENERATED MOCKS START */
|
||||
/* Generated stub for amount_asset_is_main */
|
||||
bool amount_asset_is_main(struct amount_asset *asset UNNEEDED)
|
||||
{ fprintf(stderr, "amount_asset_is_main called!\n"); abort(); }
|
||||
/* Generated stub for amount_asset_to_sat */
|
||||
struct amount_sat amount_asset_to_sat(struct amount_asset *asset UNNEEDED)
|
||||
{ fprintf(stderr, "amount_asset_to_sat called!\n"); abort(); }
|
||||
/* Generated stub for amount_sat_add */
|
||||
bool amount_sat_add(struct amount_sat *val UNNEEDED,
|
||||
struct amount_sat a UNNEEDED,
|
||||
struct amount_sat b UNNEEDED)
|
||||
{ fprintf(stderr, "amount_sat_add called!\n"); abort(); }
|
||||
/* Generated stub for amount_sat_eq */
|
||||
bool amount_sat_eq(struct amount_sat a UNNEEDED, struct amount_sat b UNNEEDED)
|
||||
{ fprintf(stderr, "amount_sat_eq called!\n"); abort(); }
|
||||
/* Generated stub for amount_sat_greater_eq */
|
||||
bool amount_sat_greater_eq(struct amount_sat a UNNEEDED, struct amount_sat b UNNEEDED)
|
||||
{ fprintf(stderr, "amount_sat_greater_eq called!\n"); abort(); }
|
||||
/* Generated stub for amount_sat_sub */
|
||||
bool amount_sat_sub(struct amount_sat *val UNNEEDED,
|
||||
struct amount_sat a UNNEEDED,
|
||||
struct amount_sat b UNNEEDED)
|
||||
{ fprintf(stderr, "amount_sat_sub called!\n"); abort(); }
|
||||
/* Generated stub for amount_sat_to_asset */
|
||||
struct amount_asset amount_sat_to_asset(struct amount_sat *sat UNNEEDED, const u8 *asset UNNEEDED)
|
||||
{ fprintf(stderr, "amount_sat_to_asset called!\n"); abort(); }
|
||||
/* Generated stub for amount_tx_fee */
|
||||
struct amount_sat amount_tx_fee(u32 fee_per_kw UNNEEDED, size_t weight UNNEEDED)
|
||||
{ fprintf(stderr, "amount_tx_fee called!\n"); abort(); }
|
||||
/* Generated stub for fromwire */
|
||||
const u8 *fromwire(const u8 **cursor UNNEEDED, size_t *max UNNEEDED, void *copy UNNEEDED, size_t n UNNEEDED)
|
||||
{ fprintf(stderr, "fromwire called!\n"); abort(); }
|
||||
/* Generated stub for fromwire_fail */
|
||||
void *fromwire_fail(const u8 **cursor UNNEEDED, size_t *max UNNEEDED)
|
||||
{ fprintf(stderr, "fromwire_fail called!\n"); abort(); }
|
||||
/* Generated stub for fromwire_secp256k1_ecdsa_signature */
|
||||
void fromwire_secp256k1_ecdsa_signature(const u8 **cursor UNNEEDED, size_t *max UNNEEDED,
|
||||
secp256k1_ecdsa_signature *signature UNNEEDED)
|
||||
{ fprintf(stderr, "fromwire_secp256k1_ecdsa_signature called!\n"); abort(); }
|
||||
/* Generated stub for fromwire_sha256 */
|
||||
void fromwire_sha256(const u8 **cursor UNNEEDED, size_t *max UNNEEDED, struct sha256 *sha256 UNNEEDED)
|
||||
{ fprintf(stderr, "fromwire_sha256 called!\n"); abort(); }
|
||||
/* Generated stub for fromwire_u32 */
|
||||
u32 fromwire_u32(const u8 **cursor UNNEEDED, size_t *max UNNEEDED)
|
||||
{ fprintf(stderr, "fromwire_u32 called!\n"); abort(); }
|
||||
/* Generated stub for fromwire_u8 */
|
||||
u8 fromwire_u8(const u8 **cursor UNNEEDED, size_t *max UNNEEDED)
|
||||
{ fprintf(stderr, "fromwire_u8 called!\n"); abort(); }
|
||||
/* Generated stub for fromwire_u8_array */
|
||||
void fromwire_u8_array(const u8 **cursor UNNEEDED, size_t *max UNNEEDED, u8 *arr UNNEEDED, size_t num UNNEEDED)
|
||||
{ fprintf(stderr, "fromwire_u8_array called!\n"); abort(); }
|
||||
/* Generated stub for fromwire_wally_psbt */
|
||||
struct wally_psbt *fromwire_wally_psbt(const tal_t *ctx UNNEEDED,
|
||||
const u8 **cursor UNNEEDED, size_t *max UNNEEDED)
|
||||
{ fprintf(stderr, "fromwire_wally_psbt called!\n"); abort(); }
|
||||
/* Generated stub for new_psbt */
|
||||
struct wally_psbt *new_psbt(const tal_t *ctx UNNEEDED,
|
||||
const struct wally_tx *wtx UNNEEDED)
|
||||
{ fprintf(stderr, "new_psbt called!\n"); abort(); }
|
||||
/* Generated stub for psbt_add_output */
|
||||
struct wally_psbt_output *psbt_add_output(struct wally_psbt *psbt UNNEEDED,
|
||||
struct wally_tx_output *output UNNEEDED,
|
||||
size_t insert_at UNNEEDED)
|
||||
{ fprintf(stderr, "psbt_add_output called!\n"); abort(); }
|
||||
/* Generated stub for psbt_append_input */
|
||||
struct wally_psbt_input *psbt_append_input(struct wally_psbt *psbt UNNEEDED,
|
||||
const struct bitcoin_outpoint *outpoint UNNEEDED,
|
||||
u32 sequence UNNEEDED,
|
||||
const u8 *scriptSig UNNEEDED,
|
||||
const u8 *input_wscript UNNEEDED,
|
||||
const u8 *redeemscript UNNEEDED)
|
||||
{ fprintf(stderr, "psbt_append_input called!\n"); abort(); }
|
||||
/* Generated stub for psbt_elements_input_set_asset */
|
||||
void psbt_elements_input_set_asset(struct wally_psbt *psbt UNNEEDED, size_t in UNNEEDED,
|
||||
struct amount_asset *asset UNNEEDED)
|
||||
{ fprintf(stderr, "psbt_elements_input_set_asset called!\n"); abort(); }
|
||||
/* Generated stub for psbt_final_tx */
|
||||
struct wally_tx *psbt_final_tx(const tal_t *ctx UNNEEDED, const struct wally_psbt *psbt UNNEEDED)
|
||||
{ fprintf(stderr, "psbt_final_tx called!\n"); abort(); }
|
||||
/* Generated stub for psbt_finalize */
|
||||
bool psbt_finalize(struct wally_psbt *psbt UNNEEDED)
|
||||
{ fprintf(stderr, "psbt_finalize called!\n"); abort(); }
|
||||
/* Generated stub for psbt_input_get_amount */
|
||||
struct amount_sat psbt_input_get_amount(const struct wally_psbt *psbt UNNEEDED,
|
||||
size_t in UNNEEDED)
|
||||
{ fprintf(stderr, "psbt_input_get_amount called!\n"); abort(); }
|
||||
/* Generated stub for psbt_input_set_wit_utxo */
|
||||
void psbt_input_set_wit_utxo(struct wally_psbt *psbt UNNEEDED, size_t in UNNEEDED,
|
||||
const u8 *scriptPubkey UNNEEDED, struct amount_sat amt UNNEEDED)
|
||||
{ fprintf(stderr, "psbt_input_set_wit_utxo called!\n"); abort(); }
|
||||
/* Generated stub for towire */
|
||||
void towire(u8 **pptr UNNEEDED, const void *data UNNEEDED, size_t len UNNEEDED)
|
||||
{ fprintf(stderr, "towire called!\n"); abort(); }
|
||||
/* Generated stub for towire_secp256k1_ecdsa_signature */
|
||||
void towire_secp256k1_ecdsa_signature(u8 **pptr UNNEEDED,
|
||||
const secp256k1_ecdsa_signature *signature UNNEEDED)
|
||||
{ fprintf(stderr, "towire_secp256k1_ecdsa_signature called!\n"); abort(); }
|
||||
/* Generated stub for towire_sha256 */
|
||||
void towire_sha256(u8 **pptr UNNEEDED, const struct sha256 *sha256 UNNEEDED)
|
||||
{ fprintf(stderr, "towire_sha256 called!\n"); abort(); }
|
||||
/* Generated stub for towire_u32 */
|
||||
void towire_u32(u8 **pptr UNNEEDED, u32 v UNNEEDED)
|
||||
{ fprintf(stderr, "towire_u32 called!\n"); abort(); }
|
||||
/* Generated stub for towire_u8 */
|
||||
void towire_u8(u8 **pptr UNNEEDED, u8 v UNNEEDED)
|
||||
{ fprintf(stderr, "towire_u8 called!\n"); abort(); }
|
||||
/* Generated stub for towire_u8_array */
|
||||
void towire_u8_array(u8 **pptr UNNEEDED, const u8 *arr UNNEEDED, size_t num UNNEEDED)
|
||||
{ fprintf(stderr, "towire_u8_array called!\n"); abort(); }
|
||||
/* Generated stub for towire_wally_psbt */
|
||||
void towire_wally_psbt(u8 **pptr UNNEEDED, const struct wally_psbt *psbt UNNEEDED)
|
||||
{ fprintf(stderr, "towire_wally_psbt called!\n"); abort(); }
|
||||
/* AUTOGENERATED MOCKS END */
|
||||
|
||||
int main(int argc, const char *argv[])
|
||||
{
|
||||
struct privkey p;
|
||||
struct pubkey pub;
|
||||
struct bitcoin_signature sig;
|
||||
struct sha256_double h;
|
||||
u8 **wit;
|
||||
size_t weight;
|
||||
|
||||
common_setup(argv[0]);
|
||||
chainparams = chainparams_for_network("bitcoin");
|
||||
|
||||
memset(&h, 0, sizeof(h));
|
||||
memset(&p, 1, sizeof(p));
|
||||
sign_hash(&p, &h, &sig.s);
|
||||
sig.sighash_type = SIGHASH_ALL;
|
||||
pubkey_from_privkey(&p, &pub);
|
||||
|
||||
wit = bitcoin_witness_2of2(tmpctx, &sig, &sig, &pub, &pub);
|
||||
|
||||
/* 1 byte for num witnesses, one per witness element */
|
||||
weight = 1;
|
||||
for (size_t i = 0; i < tal_count(wit); i++)
|
||||
weight += 1 + tal_bytelen(wit[i]);
|
||||
assert(bitcoin_tx_2of2_input_witness_weight() == weight);
|
||||
|
||||
common_shutdown();
|
||||
return 0;
|
||||
}
|
||||
10
bitcoin/tx.c
10
bitcoin/tx.c
|
|
@ -884,6 +884,16 @@ size_t bitcoin_tx_simple_input_weight(bool p2sh)
|
|||
bitcoin_tx_simple_input_witness_weight());
|
||||
}
|
||||
|
||||
size_t bitcoin_tx_2of2_input_witness_weight(void)
|
||||
{
|
||||
/* witness[0] = ""
|
||||
* witness[1] = sig
|
||||
* witness[2] = sig
|
||||
* witness[3] = 2 key key 2 CHECKMULTISIG
|
||||
*/
|
||||
return 1 + (1 + 0) + (1 + 72) + (1 + 72) + (1 + 1 + 33 + 33 + 1 + 1);
|
||||
}
|
||||
|
||||
struct amount_sat change_amount(struct amount_sat excess, u32 feerate_perkw,
|
||||
size_t total_weight)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -271,6 +271,9 @@ size_t bitcoin_tx_simple_input_witness_weight(void);
|
|||
/* We only do segwit inputs, and we assume witness is sig + key */
|
||||
size_t bitcoin_tx_simple_input_weight(bool p2sh);
|
||||
|
||||
/* The witness for our 2of2 input (closing or commitment tx). */
|
||||
size_t bitcoin_tx_2of2_input_witness_weight(void);
|
||||
|
||||
/**
|
||||
* change_amount - Is it worth making a P2WPKH change output at this feerate?
|
||||
* @excess: input amount we have above the tx fee and other outputs.
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue