cupuyc

Testing on Mac

Add to /etc/pf.conf

block out proto udp from any to any
block in proto udp from any to any
pass out proto udp from any to any port 53
pass in proto udp from any to any port 53

To apply:

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asyncapi: '2.2.0'
info:
  title: Internal Digitalbank EventBus on Azure EventGrid
  version: 1.0.0
  description: This service is in charge to pass data between Azure Step Functions and Digital Mobile Payments Service.
channels:
  internalPayments/InitPayment:
    publish:
      message:
        $ref: '#/components/messages/InitPayment'

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asyncapi: '2.2.0'
info:
  title: Kafka API with Core-Processing
  version: 1.0.0
  description: This service is part of core bank and responsible for accepting card operations commands 
channels:
  paymentTransactions/InitTransaction:
    publish:
      message:
        $ref: '#/components/messages/InitTransaction'

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openapi: 3.1.0
info:
  title: Digital Bank sign-in API
  version: '1.0'
  summary: Allows bank clients to sign in.
  contact:
    name: G2
servers:
  - url: 'http://localhost:3000'
paths:

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# From https://gist.github.com/cupuyc/8855d0e958d977ef9d6928542e35a886

set -e

mkdir -p .ebextensions

# Define instance type to use
tee -a .ebextensions/ec2-settings.config > /dev/null <<EOT
option_settings:
  aws:autoscaling:launchconfiguration:

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Protocol,Description
RTMP,"This is the first protocol that should be mentioned, because it is an old protocol that did a great job in the time the Adobe Flash shined in pair with Adobe Media Server. Nowadays, many live broadcast applications still utilize it to ingest video data from broadcaster app/device to media servers. Unfortunately browsers can’t play it natively."
WebRTC,"Web Real-Time Communications comes to allow modern browsers to support video chats. It combines many other protocols under the hood. The business value of it is unquestionable. It provides low-latency and automatic quality adjustments depending on network conditions."
HLS,"HTTP Live Streaming allows desktop and mobile browsers to natively play video content. Used as protocol for live steam in YouTube, Twitch."
MPEG-DASH,"Similar to HLS used for live stream events, and envisioned as the successor of it. However this is a downside that some mobile browsers can’t play it natively."
CMAF,"The youngest technology on the live streaming mark

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Let's Encrypt

Examples of getting certificates from Let's Encrypt working on Apache, NGINX and Node.js servers.

Obtain certificates

I chose to use the manual method, you have to make a file available to verify you own the domain. Follow the commands from running

git clone https://github.com/letsencrypt/letsencrypt
cd letsencrypt

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Misspelled lookups

Given two strings, S1 and S2, we can define an edit distance as the minimum number of operations required to change S1 to S2.

The operations might be one of the following:

• delete a character
• insert a character
• substitute a character for another character

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Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

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//sol Wallet
// Multi-sig, daily-limited account proxy/wallet.
// @authors:
// Gav Wood <g@ethdev.com>
// inheritable "property" contract that enables methods to be protected by requiring the acquiescence of either a
// single, or, crucially, each of a number of, designated owners.
// usage:
// use modifiers onlyowner (just own owned) or onlymanyowners(hash), whereby the same hash must be provided by
// some number (specified in constructor) of the set of owners (specified in the constructor, modifiable) before the
// interior is executed.