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# get crypt key from remote server
ssh <user>@<server> -C 'grep "'\''key'\''" ~/app/etc/env.php' | awk '{ print $3 }'

# substitute local env.php crypt key with remote crypt key

# on vagrant
mr dev:console

$encryptor = $di->get(\Magento\Framework\Encryption\EncryptorInterface::class);
$encryptor->decrypt('value from remote database core_config_data table goes here');

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diff --git a/vendor/magento/module-payment/Block/Transparent/Redirect.php b/vendor/magento/module-payment/Block/Transparent/Redirect.php
new file mode 100644
index 00000000000..aeaeee7e4d2
--- /dev/null
+++ b/vendor/magento/module-payment/Block/Transparent/Redirect.php
@@ -0,0 +1,60 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.

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# on VM
sudo su

rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
touch /etc/yum.repos.d/elasticsearch.repo

echo "[elasticsearch-6.x]
name=Elasticsearch repository for 6.x packages
baseurl=https://artifacts.elastic.co/packages/6.x/yum
gpgcheck=1

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# add to ~/.bashrc and run . ~/.bashrc or open a new terminal window
function m2config () {
        ssh -C $1 'php -d include_path='\''/var/www/stage/current:/var/www/html/current:/var/www/prod/current'\''  -r '\''$c = include "app/etc/env.php"; echo json_encode($c);'\''' | jq -r .$2
}

# usage
m2config www-stage@stage.mysite.com db.connection.default.username # returns db username from env.php

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>>> mr dev:console
$state = $di->get(\Magento\Framework\App\State::class);
$state->setAreaCode('frontend');
$redis = $di->get(\Magento\Framework\Session\SaveHandler\Redis::class);
$sessionData = $redis->read("<session id without 'sess_' prefix");

# fully decode like PHP
session_start();
session_decode($sessionData);
var_dump($_SESSION);

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ES_HOST='elasticsearch-host' # for example 127.0.0.1
ES_PORT='elasticsearch-port' # default 9200

# get indices
curl $ES_HOST:$ES_PORT/_cat/indices

ES_INDEX='index-name'

# get first 5 results from empty
curl $ES_HOST:$ES_PORT/$ES_INDEX/_search | jq .

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import socket
import select

if __name__ == "__main__":
    # Get socket file descriptor as a TCP socket using the IPv4 address family
    listener_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # Set some modes on the socket, not required but it's nice for our uses
    listener_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

    address_port = ("127.0.0.1", 8080)

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query Input {
  discountNode {
    metafield(namespace: "my-discount-namespace", key: "my-discount-amount") {
      value
    }
  }
  cart {
    lines {
      merchandise {
        __typename

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const getProxyExample = (initialObject = {}) => {
  const buildProxyClosure = () => {
      let data = {};
      let proxyHandler = {
          get(obj, prop) {
              return prop in data ? data[prop] : obj[prop];
          },
          set(obj, prop, value) {
              data[prop] = value;
          }

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const createObserverPattern = () => {
  let observers = [];
  let register = (observer) => {
    observers.push(observer);
  }
  
  let deregister = (observer) => {
    observers = observers.filter((registeredObserver) => !Object.is(observer, registeredObserver))
  }