Add Tink dependency to CashSecuritySdk

ios/.gitignore

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+# macOS
+.DS_Store
+
+# Xcode
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+
+# Bundler
+.bundle
+
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+
+Carthage/Build
+
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control
+# 
+# Note: if you ignore the Pods directory, make sure to uncomment
+# `pod install` in .travis.yml
+#
+# Pods/

ios/.travis.yml

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+# references:
+# * https://www.objc.io/issues/6-build-tools/travis-ci/
+# * https://github.com/supermarin/xcpretty#usage
+
+osx_image: xcode7.3
+language: objective-c
+# cache: cocoapods
+# podfile: Example/Podfile
+# before_install:
+# - gem install cocoapods # Since Travis is not always on latest version
+# - pod install --project-directory=Example
+script:
+- set -o pipefail && xcodebuild test -enableCodeCoverage YES -workspace Example/CashSecuritySdk.xcworkspace -scheme CashSecuritySdk-Example -sdk iphonesimulator9.3 ONLY_ACTIVE_ARCH=NO | xcpretty
+- pod lib lint

ios/CashSecuritySdk.podspec

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+#
+# Be sure to run `pod lib lint CashSecuritySdk.podspec' to ensure this is a
+# valid spec before submitting.
+#
+# Any lines starting with a # are optional, but their use is encouraged
+# To learn more about a Podspec see https://guides.cocoapods.org/syntax/podspec.html
+#
+
+Pod::Spec.new do |s|
+  s.name             = 'CashSecuritySdk'
+  s.version          = '0.1.0'
+  s.summary          = 'Security related functions recommended by Cash Security.'
+
+# This description is used to generate tags and improve search results.
+#   * Think: What does it do? Why did you write it? What is the focus?
+#   * Try to keep it short, snappy and to the point.
+#   * Write the description between the DESC delimiters below.
+#   * Finally, don't worry about the indent, CocoaPods strips it!
+
+  s.description      = <<-DESC
+Security functionality for interoperability/interaction with core services.
+                       DESC
+
+  s.homepage         = 'https://github.com/squareup/cash-security-sdk'
+  # s.screenshots     = 'www.example.com/screenshots_1', 'www.example.com/screenshots_2'
+  s.license          = { :type => 'Apache License, Version 2.0', :file => 'LICENSE' }
+  s.author           = { 'Cash Security Engineering' => '[email protected]' }
+  s.source           = { :git => 'https://github.com/squareup/cash-security-sdk.git', :tag => s.version.to_s }
+  # s.social_media_url = 'https://twitter.com/<TWITTER_USERNAME>'
+
+  s.ios.deployment_target = '13.0'
+
+  s.source_files = 'CashSecuritySdk/Classes/**/*'
+
+  s.swift_versions = '4.0'
+
+  # s.resource_bundles = {
+  #   'CashSecuritySdk' => ['CashSecuritySdk/Assets/*.png']
+  # }
+
+  # s.public_header_files = 'Pod/Classes/**/*.h'
+  # s.frameworks = 'UIKit', 'MapKit'
+  s.dependency 'Tink', '1.5.0'
+  s.script_phase = { name: 'Fix Tink for Apple Silicon', script: '"$PODS_TARGET_SRCROOT"/Scripts/FixTinkForAppleSilicon', execution_position: :before_compile }
+  s.static_framework = true
+  s.preserve_paths = 'Scripts/**/*'
+
+  s.pod_target_xcconfig = {
+    'FRAMEWORK_SEARCH_PATHS[sdk=iphonesimulator*][arch=arm64]' => '"$DERIVED_FILE_DIR/apple_silicon" $FRAMEWORK_SEARCH_PATHS',
+  }
+
+  s.test_spec 'UnitTests' do |test_spec|
+    test_spec.source_files = 'CashSecuritySdk/Tests/**/*'
+  end
+end