PowerShell Token Bucket Rate Limiter Class

class TokenBucket {
    [double]$Rate
    [double]$Capacity
    [double]$Tokens
    [datetime]$Last

    TokenBucket([double]$rate, [double]$capacity) {
        $this.Rate = $rate; $this.Capacity = $capacity; $this.Tokens = $capacity
        $this.Last = [datetime]::UtcNow
    }

    [bool] TryTake([int]$count = 1) {
        $now = [datetime]::UtcNow
        $elapsed = ($now - $this.Last).TotalSeconds
        $this.Tokens = [Math]::Min($this.Capacity, $this.Tokens + $elapsed * $this.Rate)
        $this.Last = $now
        if ($this.Tokens -lt $count) { return $false }
        $this.Tokens -= $count
        return $true
    }
}