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# API Design Patterns And Use Cases


This document lists various useful patterns for API design. We encourage API developers to consider the following patterns as a guide while designing APIs for services.

### Document Semantics, Formatting, and Naming

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC 2119](https://www.ietf.org/rfc/rfc2119.txt).

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# API Design Guidelines


# Introduction

The PayPal platform is a collection of reusable services that encapsulate well-defined business capabilities. Developers are encouraged to access these capabilities through Application Programming Interfaces (APIs) that enable consistent design patterns and principles. This facilitates a great developer experience and the ability to quickly compose complex business processes by combining multiple, complementary capabilities as building blocks.

PayPal APIs follow the [RESTful][0] architectural style as much as possible. To support our objectives, we have developed a set of rules, standards, and conventions that apply to the design of RESTful APIs. These have been used to help design and maintain hundreds of APIs and have evolved over several years to meet the needs of a wide variety of use cases.

We are sharing these guidelines to help propagate good API design practices in general. We have pulled extensively from the broader community and believe that it is importan

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{
    "Abia": [
        "Aba North",
        "Aba South",
        "Arochukwu",
        "Bende",
        "Ikwuano",
        "Isiala-Ngwa North",
        "Isiala-Ngwa South",
        "Isuikwato",

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<?php

return [
  "Access Bank",
  "Citibank Nigeria",
  "Diamond Bank",
  "Ecobank Nigeria",
  "Fidelity Bank",
  "First Bank Nigeria",
  "First City Monument Bank",

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<?php

return [
    "Abia" => [
        "Aba North",
        "Aba South",
        "Arochukwu",
        "Bende",
        "Ikwuano",
        "Isiala-Ngwa North",

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#!/usr/bin/env bash

export DEBIAN_FRONTEND=noninteractive

# Update Package List

apt-get update

# Update System Packages
apt-get -y upgrade

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Mailgun setup

• install Guzzle HTTP library : composer require guzzlehttp/guzzle
• [sign up to mailgun] (http://www.mailgun.com)
• Go to Domains tab and click on domains
• You will find the necessary data for .env setup
  • MAIL_DRIVER=mailgun
  • MAIL_HOST=smtp.mailgun.org
  • MAIL_PORT=587
  • MAIL_USERNAME=postmaster@sandbox------------------------------6f.mailgun.org
• MAIL_PASSWORD=502fd951f7------------------------

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from os.path import splitext

import mimetypes
from django.core.exceptions import ValidationError
from django.template.defaultfilters import filesizeformat
from django.utils.translation import ugettext_lazy as _
from django.utils.deconstruct import deconstructible


@deconstructible

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#!/bin/sh
set -e
# Install node and npm via nvm - https://github.com/creationix/nvm

# Run this script like - bash script-name.sh

# Define versions
INSTALL_NODE_VER=10
INSTALL_NVM_VER=0.33.11
INSTALL_YARN_VER=1.7.0

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defmodule Map.Helpers do
  @moduledoc """
  Functions to transform maps
  """

  @doc """
  Convert map string camelCase keys to underscore_keys
  """
  def underscore_keys(nil), do: nil