static void script_tx_sighash(struct wallet *wallet, uint256 *hash,
const struct buff *scriptPubKey,
const struct btc_msg_tx *tx, uint32 idx,
enum script_hash_type hashType) {
struct btc_msg_tx *tx2;
struct buff *buf;
int i;
ASSERT(idx < tx->in_count);
memset(hash, 0, sizeof *hash);
tx2 = btc_msg_tx_dup(tx);
Log(LGPFX " Computing sighash for txi-%u/%llu\n", idx, tx2->in_count);
/*
* Zero-out all the inputs' signatures.
*/
for (i = 0; i < tx2->in_count; i++) {
tx2->tx_in[i].scriptLength = 0;
}
size_t len = buff_maxlen(scriptPubKey);
ASSERT(len > 0);
ASSERT(tx2->tx_in[idx].scriptSig == NULL);
ASSERT(tx2->tx_in[idx].scriptLength == 0);
tx2->tx_in[idx].scriptLength = len;
tx2->tx_in[idx].scriptSig = safe_malloc(len);
memcpy(tx2->tx_in[idx].scriptSig, buff_base(scriptPubKey), len);
ASSERT((hashType & 0x1f) == SIGHASH_ALL);
/*
* Final step:
*
* Serialize tx + hashType (as a uint32) and compute hash.
*/
buf = buff_alloc();
serialize_tx(buf, tx2);
serialize_uint32(buf, hashType);
hash256_calc(buff_base(buf), buff_curlen(buf), hash);
buff_free(buf);
btc_msg_tx_free(tx2);
free(tx2);
}
static void
txdb_free_tx_entry(struct tx_entry *txe)
{
btc_msg_tx_free(&txe->tx);
free(txe);
}
