static void runtest(const char *json_fn_base, const char *ser_fn_base)
{
char *fn = test_filename(json_fn_base);
json_t *meta = read_json(fn);
assert(json_is_object(meta));
char *ser_fn = test_filename(ser_fn_base);
void *data = NULL;
size_t data_len = 0;
bool rc = bu_read_file(ser_fn, &data, &data_len, 100 * 1024 * 1024);
assert(rc);
const char *hashstr = json_string_value(json_object_get(meta, "hash"));
assert(hashstr != NULL);
unsigned int size = json_integer_value(json_object_get(meta, "size"));
assert(data_len == size);
struct bp_tx tx;
bp_tx_init(&tx);
struct const_buffer buf = { data, data_len };
rc = deser_bp_tx(&tx, &buf);
assert(rc);
cstring *gs = cstr_new_sz(10000);
ser_bp_tx(gs, &tx);
if (gs->len != data_len) {
fprintf(stderr, "gs->len %ld, data_len %lu\n",
(long)gs->len, data_len);
assert(gs->len == data_len);
}
assert(memcmp(gs->str, data, data_len) == 0);
bp_tx_calc_sha256(&tx);
char hexstr[BU256_STRSZ];
bu256_hex(hexstr, &tx.sha256);
if (strcmp(hexstr, hashstr)) {
fprintf(stderr, "tx: wanted hash %s,\n got hash %s\n",
hashstr, hexstr);
assert(!strcmp(hexstr, hashstr));
}
assert(tx.vin->len == 1);
assert(tx.vout->len == 2);
struct bp_tx tx_copy;
bp_tx_init(&tx_copy);
bp_tx_copy(&tx_copy, &tx);
bp_tx_calc_sha256(&tx_copy);
assert(bu256_equal(&tx_copy.sha256, &tx.sha256) == true);
bp_tx_free(&tx);
bp_tx_free(&tx_copy);
cstr_free(gs, true);
free(data);
free(fn);
free(ser_fn);
json_decref(meta);
}
void bp_tx_sighash(bu256_t *hash, const GString *scriptCode,
const struct bp_tx *txTo, unsigned int nIn,
int nHashType)
{
if (nIn >= txTo->vin->len) {
bu256_set_u64(hash, 1);
goto out;
}
struct bp_tx txTmp;
bp_tx_init(&txTmp);
bp_tx_copy(&txTmp, txTo);
/* TODO: find-and-delete OP_CODESEPARATOR from scriptCode */
/* Blank out other inputs' signatures */
unsigned int i;
struct bp_txin *txin;
for (i = 0; i < txTmp.vin->len; i++) {
txin = g_ptr_array_index(txTmp.vin, i);
g_string_set_size(txin->scriptSig, 0);
if (i == nIn)
g_string_append_len(txin->scriptSig,
scriptCode->str, scriptCode->len);
}
/* Blank out some of the outputs */
if ((nHashType & 0x1f) == SIGHASH_NONE) {
/* Wildcard payee */
bp_tx_free_vout(&txTmp);
txTmp.vout = g_ptr_array_new_full(1, g_free);
/* Let the others update at will */
for (i = 0; i < txTmp.vin->len; i++) {
txin = g_ptr_array_index(txTmp.vin, i);
if (i != nIn)
txin->nSequence = 0;
}
}
else if ((nHashType & 0x1f) == SIGHASH_SINGLE) {
/* Only lock-in the txout payee at same index as txin */
unsigned int nOut = nIn;
if (nOut >= txTmp.vout->len) {
bu256_set_u64(hash, 1);
goto out;
}
g_ptr_array_set_size(txTmp.vout, nOut + 1);
for (i = 0; i < nOut; i++) {
struct bp_txout *txout;
txout = g_ptr_array_index(txTmp.vout, i);
bp_txout_set_null(txout);
}
/* Let the others update at will */
for (i = 0; i < txTmp.vin->len; i++) {
txin = g_ptr_array_index(txTmp.vin, i);
if (i != nIn)
txin->nSequence = 0;
}
}
/* Blank out other inputs completely;
not recommended for open transactions */
if (nHashType & SIGHASH_ANYONECANPAY) {
if (nIn > 0)
g_ptr_array_remove_range(txTmp.vin, 0, nIn);
g_ptr_array_set_size(txTmp.vin, 1);
}
/* Serialize and hash */
bp_tx_calc_sighash(hash, &txTmp, nHashType);
out:
bp_tx_free(&txTmp);
}
