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<?php |
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namespace Blocktrail\SDK\Services; |
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use Blocktrail\SDK\BlocktrailSDK; |
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use Blocktrail\SDK\UnspentOutputFinder; |
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class InsightUnspentOutputFinder extends UnspentOutputFinder { |
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protected $testnet; |
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protected $retryLimit; |
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protected $sleepTime; |
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/** |
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* @param bool $testnet |
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*/ |
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public function __construct($testnet = false) { |
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$this->testnet = $testnet; |
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$this->retryLimit = 5; |
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$this->sleepTime = 20; |
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} |
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public function getUTXOs(array $addresses) { |
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$results = array(); |
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foreach (array_chunk($addresses, 500) as $addresses) { |
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if ($this->debug) { |
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echo "\nchecking " . count($addresses) . " addresses ..."; |
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} |
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//get the utxos for this address |
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$utxos = $this->getUnspentOutputs($addresses); |
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if (count($utxos) > 0) { |
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$results = array_merge($results, $utxos); |
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} |
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} |
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return $results; |
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} |
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/** |
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* gets unspent outputs for a batch of addresses, returning and array of outputs with hash, index, value, and script pub hex |
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* |
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* @param string[] $addresses |
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* @return array 2d array of unspent outputs as ['hash' => $hash, 'index' => $index, 'value' => $value, 'address' => $address, 'script_hex' => $scriptHex] |
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* @throws \Exception |
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*/ |
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protected function getUnspentOutputs($addresses) { |
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//get unspent outputs for the address - required data: hash, index, value, and script hex |
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$utxos = []; |
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$retries = 0; |
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do { |
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$more = true; |
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try { |
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$client = new \GuzzleHttp\Client(); |
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$response = $client->post( |
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'https://' . ($this->testnet ? 'test-' : '') . 'insight.bitpay.com/api/addrs/utxo', |
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[ |
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'json' => ['addrs' => implode(",", $addresses)], |
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'timeout' => 30, |
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] |
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); |
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$json = json_decode($response->getBody(), true); |
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$utxos = $json; |
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$more = false; |
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} catch (\Exception $e) { |
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//if rate limit hit, sleep for a short while and try again |
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if ($retries < $this->retryLimit) { |
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$retries++; |
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sleep($this->sleepTime); |
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} else { |
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throw $e; |
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} |
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} |
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} while ($more); |
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//reduce the returned data into the values we're interested in |
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$result = array_map(function ($utxo) { |
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return array( |
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'hash' => $utxo['txid'], |
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'index' => $utxo['vout'], |
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'value' => BlocktrailSDK::toSatoshi($utxo['amount']), |
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'address' => $utxo['address'], |
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'script_hex' => $utxo['scriptPubKey'], |
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); |
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}, $utxos); |
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return $result; |
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} |
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} |
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blocktrail /
blocktrail-sdk-php
