src/Amadeus/Client/Session/Handler/HandlerFactory.php
protected static function loadNonceBase($handlerParams)
    {
        if (empty($handlerParams->authParams->nonceBase)) {
            $handlerParams->authParams->nonceBase = SomewhatRandomGenerator::generateSomewhatRandomString();
        }

        return $handlerParams;
    }
protected static function loadNonceBase($handlerParams)
    {
        if (empty($handlerParams->authParams->nonceBase)) {
            $handlerParams->authParams->nonceBase = SomewhatRandomGenerator::generateSomewhatRandomString();
        }

        return $handlerParams;
    }
Get the NONCE base to be used when generating somewhat random nonce strings

From the NONCE base file, or fallback is a new somewhat random string each instantiation.

@param SessionHandlerParams $handlerParams
@return SessionHandlerParams