GO-TAMBOON

This project is a part of golang challenge

Goal

Decrypt the file using a simple ROT-128 algorithm.
Make donations by creating a Charge via the Charge API for each row in the decrypted CSV.
Produce a brief summary at the end.
Handle errors gracefully, without stopping the entire process.
Writes readable and maintainable code.

Bonus

Have a good Go package structure.
Be a good internet citizen and throttles the API call if we hit rate limit.
Run as fast as possible on a multi-core CPU.
Allocate as little memory as possible.
Complete the entire process without leaving large trace of Credit Card numbers in memory, or on disk.
Ensure reproducible builds on your workspace.

How to run

I provide run.sh script for execute. The meaning of each flag is

-f  string  # path to encrypt file
-pk string  # public key
-sk string  # secret key
-n num      # number of task to run in parallel
-t num      # show top num in summary
-d boolean  # if true the will print log on terminal

You can get public key and secret key from omise website

Result

The result in following is ran on 06/2021

Because more of credit card data may expired in the future so the success rate may not be the same

$ ./run.sh #  -n 3 -d false

Performing donations on ../data/fng.1000.csv.rot128
Done.

Summary:

total received           : 26863951.03  THB
successfully donated     : 13094005.50  THB
faulty donation          : 13769945.53  THB

all                      : 1000 times
success rate             : 48.20 %
average per person       : 13094.01     THB

Top 3 Donors:
 1. Mrs. Mimosa R Tûk              :     50750.24 THB
 2. Mr. Falco S Bracegirdle        :     50744.57 THB
 3. Mrs. Pimpernel C Headstrong    :     50684.38 THB

Executed time: 3m6.979439124s

Performance (at 06/2021)

n	time (m:s:ms)	Success rate (of all card)	Success rate (of only valid or non expired card)
1	10:47:96	48.20%	100.00%
2	04:34:71	48.20%	100.00%
3	03:06:98	48.20%	100.00%
4	02:21:42	48.20%	100.00%
5	01:54:04	47.50%	98.55%
6	01:07:20	30.80%	63.90%
7	01:05:43	29.00%	60.17%
8	00:48:11	23.20%	48.13%
9	00:31:85	15.00%	31.12%
10	00:27:20	12.90%	26.76%