Maksym Melnychok mks-m

## encrypt_decrypt.rb
require 'openssl'
require 'base64'

# key and iv stored in configs, generated using:
# cipher = OpenSSL::Cipher::Cipher.new('AES-256-CBC').encrypt
# key = cipher.random_key
# iv = cipher.random_iv

def encrypt_id(key, iv, id)
  cipher = OpenSSL::Cipher::Cipher.new('AES-256-CBC').encrypt

## fullnode.md

      
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                mks-m
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              Last active
              November 13, 2023 14:26
                — forked from romanz/fullnode.md
            
              
                Bitcoin Full Node on AWS Free Tier
              
          
    Bitcoin Full Node on AWS Free Tier

Provisioning


Launch one T2 micro instance, using Ubuntu 14.04 LTS AMI.
Open SSH and Bitcoin Protocol TCP ports: 22, 8333.
Attach 150GB EBS (General-Purpose SSD) volume for blockchain storage to /dev/sdf.

The pricing would be ~$15/month.
See here for more details.

  
## speedtest.rb
# just speed test for http://stackoverflow.com/questions/11502629/how-to-do-number-to-string-suffix/11502715#11502715

# if we properly test int<->str conversion the log_10 method is about 30% faster

begin
  int = 5

  a = Time.now.to_f
  10_000_000.times { int.to_s.ljust(3, "0").to_i }
  puts Time.now.to_f - a # => 1.3s
	require 'openssl'
	require 'base64'

	# key and iv stored in configs, generated using:
	# cipher = OpenSSL::Cipher::Cipher.new('AES-256-CBC').encrypt
	# key = cipher.random_key
	# iv = cipher.random_iv

	def encrypt_id(key, iv, id)
	cipher = OpenSSL::Cipher::Cipher.new('AES-256-CBC').encrypt
	# just speed test for http://stackoverflow.com/questions/11502629/how-to-do-number-to-string-suffix/11502715#11502715

	# if we properly test int<->str conversion the log_10 method is about 30% faster

	begin
	int = 5

	a = Time.now.to_f
	10_000_000.times { int.to_s.ljust(3, "0").to_i }
	puts Time.now.to_f - a # => 1.3s