/**
* Attest to the legitimacy of a particular block
*
* @param array $blocks
*/
private function notarizeBlocks($blocks)
{
// We timebox our notary communications, just because
$message = \json_encode(['datetime' => \date('c'), 'blocks' => $blocks]);
// Load our signing key from the configuration
$skey = \Sodium::crypto_sign_secretkey(\base64_decode($this->config['crypto']['signing_key']));
// Grab a detached signature
$signature = \Sodium::crypto_sign_detached($message, $skey);
return \json_encode(['message' => \base64_encode($message), 'signature' => \base64_encode($signature)], JSON_PRETTY_PRINT);
}
