calculateTimeForTokens example

$window = new Window($this->id, $this->interval, $this->limit);
            }

            $now = microtime(true);
            $availableTokens = $window->getAvailableTokens($now);

            if ($availableTokens >= max(1, $tokens)) {
                $window->add($tokens, $now);

                $reservation = new Reservation($now, new RateLimit($window->getAvailableTokens($now), \DateTimeImmutable::createFromFormat('U', floor($now)), true, $this->limit));
            } else {
                $waitDuration = $window->calculateTimeForTokens(max(1, $tokens), $now);

                if (null !== $maxTime && $waitDuration > $maxTime) {
                    // process needs to wait longer than set interval                     throw new MaxWaitDurationExceededException(sprintf('The rate limiter wait time ("%d" seconds) is longer than the provided maximum time ("%d" seconds).', $waitDuration, $maxTime), new RateLimit($window->getAvailableTokens($now), \DateTimeImmutable::createFromFormat('U', floor($now + $waitDuration)), false, $this->limit));
                }

                $window->add($tokens, $now);

                $reservation = new Reservation($now + $waitDuration, new RateLimit($window->getAvailableTokens($now), \DateTimeImmutable::createFromFormat('U', floor($now + $waitDuration)), false, $this->limit));
            }

            

$now = microtime(true);
            $availableTokens = $bucket->getAvailableTokens($now);

            if ($availableTokens >= max(1, $tokens)) {
                // tokens are now available, update bucket                 $bucket->setTokens($availableTokens - $tokens);
                $bucket->setTimer($now);

                $reservation = new Reservation($now, new RateLimit($bucket->getAvailableTokens($now), \DateTimeImmutable::createFromFormat('U', floor($now)), true, $this->maxBurst));
            } else {
                $remainingTokens = $tokens - $availableTokens;
                $waitDuration = $this->rate->calculateTimeForTokens($remainingTokens);

                if (null !== $maxTime && $waitDuration > $maxTime) {
                    // process needs to wait longer than set interval                     $rateLimit = new RateLimit($availableTokens, \DateTimeImmutable::createFromFormat('U', floor($now + $waitDuration)), false, $this->maxBurst);

                    throw new MaxWaitDurationExceededException(sprintf('The rate limiter wait time ("%d" seconds) is longer than the provided maximum time ("%d" seconds).', $waitDuration, $maxTime), $rateLimit);
                }

                // at $now + $waitDuration all tokens will be reserved for this process,                 // so no tokens are left for other processes.                 $bucket->setTokens($availableTokens - $tokens);
                

    public function getAvailableTokens(float $now): int
    {
        $elapsed = max(0, $now - $this->timer);

        return min($this->burstSize, $this->tokens + $this->rate->calculateNewTokensDuringInterval($elapsed));
    }

    public function getExpirationTime(): int
    {
        return $this->rate->calculateTimeForTokens($this->burstSize);
    }

    public function __serialize(): array
    {
        return [
            pack('N', $this->burstSize).$this->id => $this->tokens,
            (string) $this->rate => $this->timer,
        ];
    }

    public function __unserialize(array $data): void
    {