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

    protected function insertKey(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;
            }
            // Create new entry
            $supplierData['signing_keys'][] = ['type' => $keyData['type'] ?? 'signing', 'public_key' => $keyData['public_key']];
            return \file_put_contents($filePath, \json_encode($supplierData, JSON_PRETTY_PRINT)) !== false;
        } elseif ($keyData['type'] === 'master') {
            // The supplier's first key.
            $supplierData = ['channels' => [$this->channel], 'signing_keys' => [['type' => 'master', 'public_key' => $keyData['public_key']]]];
            return \file_put_contents($filePath, \json_encode($supplierData, JSON_PRETTY_PRINT)) !== false;
        }
        // Fail closed:
        return false;
    }