You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: retry.go
    path of file: ./repos/corteza/server/vendor/github.com/minio/minio-go/v6
    
    the code of the file until where you have to start completion: /*
 * MinIO Go Library for Amazon S3 Compatible Cloud Storage
 * Copyright 2015-2017 MinIO, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless 
    
func (c Client) newRetryTimer(ctx context.Context, maxRetry int, unit time.Duration, cap time.Duration, jitter float64) <-chan int {
	attemptCh := make(chan int)

	// computes the exponential backoff duration according to
	// https://www.awsarchitectureblog.com/2015/03/backoff.html
	exponentialBackoffWait := func(attempt int) time.Duration {
		// normalize jitter to the range [0, 1.0]
		if jitter < NoJitter {
			jitter = NoJitter
		}
		if jitter > MaxJitter {
			jitter = MaxJitter
		}

		//sleep = random_between(0, min(cap, base * 2 ** attempt))
		sleep := unit * time.Duration(1<<uint(attempt))
		if sleep > cap {
			sleep = cap
		}
		if jitter != NoJitter {
			sleep -= time.Duration(c.random.Float64() * float64(sleep) * jitter)
		}
		return sleep
	}

	go func() {
		defer close(attemptCh)
		for i := 0; i < maxRetry; i++ {
			select {
			case attemptCh <- i + 1:
			case <-ctx.Done():
				return
			}

			select {
			case <-time.After(exponentialBackoffWait(i)):
			case <-ctx.Done():
				return
			}
		}
	}()
	return attemptCh
}