function crawl_blockchain($coin_name, $block_coll, $transaction_coll, $start)
{
$client = get_rpc_client();
while (1) {
try {
$hash = get_block_hash($client, $start);
$data = get_block_data($client, $hash);
$txs = $data['tx'];
$num_txs = count($txs);
print "Crawling block {$start} ... (num_tx = {$num_txs})\n";
$tx_array = array();
for ($i = 0; $i < $num_txs; $i++) {
try {
$cur_tx = $txs[$i];
if ($start > 0) {
$raw_tx = $client->getrawtransaction($cur_tx);
$decoded_tx = $client->decoderawtransaction($raw_tx);
} else {
$raw_tx = null;
$decoded_tx = null;
}
array_push($tx_array, $cur_tx);
$vin_array = array();
$num_vin = count($decoded_tx['vin']);
for ($j = 0; $j < $num_vin; $j++) {
if (isset($decoded_tx['vin'][$j]['coinbase'])) {
$cur_vin_array = array('coinbase' => $decoded_tx['vin'][$j]['coinbase'], 'sequence' => $decoded_tx['vin'][$j]['sequence']);
array_push($vin_array, $cur_vin_array);
} else {
if (isset($decoded_tx['vin'][$j]['scriptSig'])) {
$script_sig_array = array('asm' => $decoded_tx['vin'][$j]['scriptSig']['asm'], 'hex' => $decoded_tx['vin'][$j]['scriptSig']['hex']);
$cur_vin_array = array('txid' => $decoded_tx['vin'][$j]['txid'], 'vout' => $decoded_tx['vin'][$j]['vout'], 'scriptSig' => $script_sig_array, 'sequence' => $decoded_tx['vin'][$j]['sequence']);
array_push($vin_array, $cur_vin_array);
}
}
}
$vout_array = array();
$num_vout = count($decoded_tx['vout']);
for ($j = 0; $j < $num_vout; $j++) {
$cur_address_array = $decoded_tx['vout'][$j]['scriptPubKey']['addresses'];
$cur_script_array = array('asm' => $decoded_tx['vout'][$j]['scriptPubKey']['asm'], 'hex' => $decoded_tx['vout'][$j]['scriptPubKey']['hex'], 'reqSigs' => $decoded_tx['vout'][$j]['scriptPubKey']['reqSigs'], 'type' => $decoded_tx['vout'][$j]['scriptPubKey']['type'], 'addresses' => $cur_address_array);
$cur_vout_array = array('value' => $decoded_tx['vout'][$j]['value'], 'n' => $decoded_tx['vout'][$j]['n'], 'scriptPubKey' => $cur_script_array);
array_push($vout_array, $cur_vout_array);
}
$tx_data_array = array('txid' => $decoded_tx['txid'], 'version' => $decoded_tx['version'], 'locktime' => $decoded_tx['locktime'], 'vin' => $vin_array, 'vout' => $vout_array);
$tx_data = array('index' => $i, 'block_index' => $start, 'hash' => $cur_tx, 'data' => $tx_data_array);
$transaction_coll->insert($tx_data);
} catch (Exception $tx_e) {
print "Skipping transaction: No info: {$tx_e}\n";
}
}
$block_data = array('index' => $start, 'data' => array('hash' => $hash, "size" => $data['size'], "height" => $data['height'], "version" => $data['version'], "merkleroot" => $data['merkleroot'], "tx" => $tx_array, "time" => $data['time'], "nonce" => $data['nonce'], "bits" => $data['bits'], "difficulty" => $data['difficulty'], "previousblockhash" => $start == 0 ? '' : $data['previousblockhash'], "nextblockhash" => $data['nextblockhash']));
$block_coll->insert($block_data);
$start++;
set_last_block($block_coll, $start);
} catch (Exception $e) {
print "Failed to retrieve block info at index {$start}: {$e}\n";
break;
}
}
}
if (empty($block)) {
return "error: could not get block {$block_hash}";
}
foreach ($block['tx'] as $key => $txid) {
$tx = $daemon->getrawtransaction($txid, 1);
if (empty($tx)) {
return "error: could not get tx {$txid}";
} else {
scan_tx($tx);
}
}
return $block;
}
while ($l_blk <= $block_height) {
$block_hash = $daemon->getblockhash($l_blk);
$last_hash = get_block_hash($l_blk);
if (empty($block_hash)) {
$error = "error: could not get block {$l_blk}";
break;
}
if (empty($last_hash) || $last_hash === $null_64bstr) {
$block = process_block($block_hash);
if (isset($block['hash'])) {
update_astats(false);
put_block_hash($l_blk, $block_hash);
$l_txn += count($block['tx']);
$l_blk++;
} else {
$error = $block;
break;
}