Airship\Cabin\Bridge\Blueprint\ChannelUpdates::revokeKey PHP Method

    protected function revokeKey(array $keyData, array $nodeData) : bool
    {
        $supplier = \preg_replace('/[^A-Za-z0-9_\\-]/', '', $keyData['supplier']);
        if (empty($supplier)) {
            throw new InvalidType(\__('Expected non-empty string for supplier name'));
        }
        $filePath = ROOT . '/config/supplier_keys/' . $supplier . '.json';
        if (\file_exists($filePath)) {
            $supplierData = \Airship\loadJSON($filePath);
            if (!$this->verifyMasterSignature($supplierData, $keyData, $nodeData)) {
                return false;
            }
            // Remove the revoked key.
            foreach ($supplierData['signing_keys'] as $i => $key) {
                if (\hash_equals($keyData['public_key'], $key['public_key'])) {
                    unset($supplierData['signing_keys'][$i]);
                    break;
                }
            }
            return \file_put_contents($filePath, \json_encode($supplierData, JSON_PRETTY_PRINT)) !== false;
        }
        // Fail closed:
        return false;
    }