bool bp_block_valid(struct bp_block *block)
{
bp_block_calc_sha256(block);
if (!block->vtx || !block->vtx->len)
return false;
if (bp_block_ser_size(block) > MAX_BLOCK_SIZE)
return false;
if (!bp_block_valid_target(block)) return false;
time_t now = time(NULL);
if (block->nTime > (now + (2 * 60 * 60)))
return false;
if (!bp_block_valid_merkle(block)) return false;
unsigned int i;
for (i = 0; i < block->vtx->len; i++) {
struct bp_tx *tx;
tx = g_ptr_array_index(block->vtx, i);
if (!bp_tx_valid(tx))
return false;
bool is_coinbase_idx = (i == 0);
bool is_coinbase = bp_tx_coinbase(tx);
if (is_coinbase != is_coinbase_idx)
return false;
}
return true;
}
static void test_tx_valid(bool is_valid, struct bp_hashtab *input_map,
cstring *tx_ser, bool enforce_p2sh)
{
struct bp_tx tx;
bp_tx_init(&tx);
struct const_buffer buf = { tx_ser->str, tx_ser->len };
assert(deser_bp_tx(&tx, &buf) == true);
if (is_valid) {
/* checking for valid tx; !bp_tx_valid implies test fail */
assert(bp_tx_valid(&tx) == true);
} else {
/* checking for invalid tx; bp_tx_valid==false implies test
* succeeded; no more work to do; bp_tx_valid==true
* implies the test will detect the invalid condition
* further down in the code
*/
if (bp_tx_valid(&tx) == false)
goto out;
}
bp_tx_calc_sha256(&tx);
unsigned int i;
for (i = 0; i < tx.vin->len; i++) {
struct bp_txin *txin;
txin = parr_idx(tx.vin, i);
assert(txin != NULL);
cstring *scriptPubKey = bp_hashtab_get(input_map,
&txin->prevout);
if (scriptPubKey == NULL) {
if (!is_valid) {
/* if testing tx_invalid.json, missing input
* is invalid, and therefore correct
*/
continue;
}
char tx_hexstr[BU256_STRSZ], hexstr[BU256_STRSZ];
bu256_hex(tx_hexstr, &tx.sha256);
bu256_hex(hexstr, &txin->prevout.hash);
dump_comments();
fprintf(stderr,
"tx-valid: TX %s\n"
"tx-valid: prevout (%s, %u) not found\n",
tx_hexstr, hexstr, txin->prevout.n);
assert(scriptPubKey != NULL);
}
bool rc = bp_script_verify(txin->scriptSig, scriptPubKey,
&tx, i,
enforce_p2sh ? SCRIPT_VERIFY_P2SH :
SCRIPT_VERIFY_NONE, 0);
if (rc != is_valid) {
char tx_hexstr[BU256_STRSZ];
bu256_hex(tx_hexstr, &tx.sha256);
dump_comments();
fprintf(stderr,
"tx-valid: TX %s\n"
"tx-valid: txin %u script verification failed\n",
tx_hexstr, i);
assert(rc == is_valid);
}
}
out:
bp_tx_free(&tx);
}
