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<?php |
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namespace Blocktrail\SDK; |
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use BitWasp\Bitcoin\Key\Deterministic\HierarchicalKeyFactory; |
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use Blocktrail\SDK\Bitcoin\BIP32Key; |
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use Endroid\QrCode\QrCode; |
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/** |
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* Class BackupGenerator |
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*/ |
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class BackupGenerator { |
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const QR_CODE_SIZE = 195; |
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/** |
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* path to fonts used for pdf generation |
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* |
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* @var string |
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*/ |
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protected $fontsPath; |
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/** |
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* array of data and QR codes for the blocktrail public keys |
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* |
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* @var null |
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*/ |
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protected $blocktrailPubKeyQRs = []; |
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protected $identifier; |
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protected $backupInfo; |
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protected $extra; |
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protected $options = [ |
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'page1' => true, |
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'page2' => true, |
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'page3' => true, |
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]; |
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/** |
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* @param string $identifier |
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* @param array $backupInfo |
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* @param array $extra |
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* @param null $options |
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*/ |
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public function __construct($identifier, $backupInfo, $extra = null, $options = null) { |
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/* |
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* if DOMPDF is not already loaded we have to do it |
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* they require a config file to be loaded, no autoloading :/ |
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*/ |
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if (!defined('DOMPDF_ENABLE_AUTOLOAD')) { |
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// disable DOMPDF's internal autoloader if you are using Composer |
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define('DOMPDF_ENABLE_AUTOLOAD', false); |
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//try the different possible locations for the config file, depending on if the sdk is included as a dependency or is the main project itself |
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(@include_once __DIR__ . '/../../../dompdf/dompdf/dompdf_config.inc.php') || @include_once __DIR__ . '/../vendor/dompdf/dompdf/dompdf_config.inc.php'; |
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} |
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//set the fonts path |
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$this->fontsPath = dirname(__FILE__) . '/../resources/fonts'; |
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$this->identifier = $identifier; |
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$this->backupInfo = $backupInfo; |
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$this->extra = $extra ?: []; |
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$this->options = array_merge($this->options, $options ?: []); |
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} |
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/** |
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* process the blocktrail public keys and create qr codes for each one |
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*/ |
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protected function processBlocktrailPubKeys() { |
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if (!isset($this->backupInfo['blocktrail_public_keys'])) { |
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return; |
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} |
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//create QR codes for each blocktrail pub key |
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foreach ($this->backupInfo['blocktrail_public_keys'] as $keyIndex => $key) { |
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$key = $key instanceof BIP32Key ? $key : BIP32Key::create(HierarchicalKeyFactory::fromExtended($key[0]), $key[1]); |
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$qrCode = new QrCode(); |
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$qrCode |
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->setText($key->key()->toExtendedKey()) |
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->setSize(self::QR_CODE_SIZE-20) |
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->setPadding(10) |
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->setErrorCorrection('high') |
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->setForegroundColor(array('r' => 0, 'g' => 0, 'b' => 0, 'a' => 0)) |
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->setBackgroundColor(array('r' => 255, 'g' => 255, 'b' => 255, 'a' => 0)) |
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->setLabel("KeyIndex: ".$keyIndex." Path: ".$key->path()) |
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->setLabelFontSize(10) |
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; |
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$this->blocktrailPubKeyQRs[] = array( |
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'keyIndex' => $keyIndex, |
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'path' => $key->path(), |
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'qr' => $qrCode->getDataUri(), |
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'qrImg' => $qrCode->getImage(), |
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); |
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} |
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} |
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/** |
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* generate html document of backup details |
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* |
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* @return string |
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*/ |
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public function generateHTML() { |
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//create blocktrail pub key QR codes if not already done |
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if (!$this->blocktrailPubKeyQRs) { |
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$this->processBlocktrailPubKeys(); |
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} |
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$pubKeysHtml = ""; |
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foreach ($this->blocktrailPubKeyQRs as $pubKey) { |
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$pubKeysHtml .= "<img src='{$pubKey['qr']}' />"; |
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} |
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$totalPubKeys = count($this->blocktrailPubKeyQRs); |
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$backupInfo = $this->prepareBackupInfo(); |
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$extraInfo = $this->prepareExtraInfo(); |
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$passwordEncryptedSecret = null; |
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if (isset($this->backupInfo['encrypted_secret'])) { |
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$passwordEncryptedSecret = $this->backupInfo['encrypted_secret']; |
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} |
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$html = self::renderTemplate(__DIR__ . "/../resources/templates/recovery_sheet.html.php", [ |
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'identifier' => $this->identifier, |
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'totalPubKeys' => $totalPubKeys, |
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'pubKeysHtml' => $pubKeysHtml, |
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'backupInfo' => $backupInfo, |
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'extraInfo' => $extraInfo, |
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'passwordEncryptedSecret' => $passwordEncryptedSecret, |
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'options' => $this->options, |
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]); |
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return $html; |
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} |
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protected function prepareBackupInfo() { |
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$backupInfo = []; |
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if (isset($this->backupInfo['primary_mnemonic'])) { |
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$backupInfo[] = [ |
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'title' => 'Primary Mnemonic', |
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'mnemonic' => $this->backupInfo['primary_mnemonic'], |
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]; |
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} |
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if (isset($this->backupInfo['backup_mnemonic'])) { |
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$backupInfo[] = [ |
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'title' => 'Primary Mnemonic', |
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'mnemonic' => $this->backupInfo['backup_mnemonic'], |
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]; |
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} |
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if (isset($this->backupInfo['encrypted_primary_seed'])) { |
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$backupInfo[] = [ |
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'title' => 'Encrypted Primary Seed', |
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'mnemonic' => $this->backupInfo['encrypted_primary_seed'], |
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]; |
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} |
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if (isset($this->backupInfo['backup_seed'])) { |
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$backupInfo[] = [ |
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'title' => 'Backup Seed', |
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'mnemonic' => $this->backupInfo['backup_seed'], |
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]; |
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} |
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if (isset($this->backupInfo['recovery_encrypted_secret'])) { |
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$backupInfo[] = [ |
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'title' => 'Encrypted Recovery Secret', |
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'mnemonic' => $this->backupInfo['recovery_encrypted_secret'], |
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]; |
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} |
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return $backupInfo; |
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} |
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protected function prepareExtraInfo() { |
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$extraInfo = []; |
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foreach ($this->extra as $k => $v) { |
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if (is_array($v)) { |
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$extraInfo[] = $v; |
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} else { |
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$extraInfo[] = ['title' => $k, 'value' => $v]; |
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} |
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} |
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return $extraInfo; |
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} |
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public static function renderTemplate($file, $vars) { |
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if (is_array($vars) && !empty($vars)) { |
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extract($vars); |
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} |
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ob_start(); |
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include $file; |
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return ob_get_clean(); |
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} |
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/** |
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* generate PDF document of backup details |
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* @return string pdf data, ready to be saved to file or streamed to browser |
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*/ |
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public function generatePDF() { |
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$dompdf = new \DOMPDF(); |
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$html = $this->generateHTML(); |
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$dompdf->load_html($html); |
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$dompdf->render(); |
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$pdfStream = $dompdf->output(); |
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return $pdfStream; |
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} |
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/** |
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* generate text document of backup details (not implemented yet) |
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* |
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*/ |
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public function generateTxt() { |
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//... |
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} |
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} |
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blocktrail /
blocktrail-sdk-php
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