Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
DevTalks Bucharest 2015 - A Credit Card Walks i...
Search
Cristiano Betta
June 11, 2015
Technology
0
600
DevTalks Bucharest 2015 - A Credit Card Walks into a Bar...
My talk from DevTalks Bucharest 2015
Cristiano Betta
June 11, 2015
Tweet
Share
More Decks by Cristiano Betta
See All by Cristiano Betta
Docs as Engineering - DevRelCon London 2019
cbetta
0
150
DevRelCon London 2019 - Developer Experience Workshop
cbetta
0
140
DevRelCon London 2019 - Developer Experience Workshop
cbetta
0
340
The 7 Deadly Sins of Developer Experience (DevRelCon Tokyo)
cbetta
0
4.1k
The State of Encryption
cbetta
0
380
Developer Experience Workshop
cbetta
1
590
The 7 Deadly Sins of Developer Onboarding
cbetta
0
190
A brick by brick guide to developer experience
cbetta
2
640
Hackathons Workshop
cbetta
0
310
Other Decks in Technology
See All in Technology
KotlinConf 2025_イベントレポート
sony
1
110
Webブラウザ向け動画配信プレイヤーの 大規模リプレイスから得た知見と学び
yud0uhu
0
230
OCI Oracle Database Services新機能アップデート(2025/06-2025/08)
oracle4engineer
PRO
0
110
Snowflakeの生成AI機能を活用したデータ分析アプリの作成 〜Cortex AnalystとCortex Searchの活用とStreamlitアプリでの利用〜
nayuts
1
460
これでもう迷わない!Jetpack Composeの書き方実践ガイド
zozotech
PRO
0
300
企業の生成AIガバナンスにおけるエージェントとセキュリティ
lycorptech_jp
PRO
2
150
COVESA VSSによる車両データモデルの標準化とAWS IoT FleetWiseの活用
osawa
1
260
Platform開発が先行する Platform Engineeringの違和感
kintotechdev
4
540
フルカイテン株式会社 エンジニア向け採用資料
fullkaiten
0
8.7k
MCPで変わる Amebaデザインシステム「Spindle」の開発
spindle
PRO
3
3.2k
【実演版】カンファレンス登壇者・スタッフにこそ知ってほしいマイクの使い方 / 大吉祥寺.pm 2025
arthur1
1
680
なぜSaaSがMCPサーバーをサービス提供するのか?
sansantech
PRO
8
2.7k
Featured
See All Featured
Producing Creativity
orderedlist
PRO
347
40k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.5k
Measuring & Analyzing Core Web Vitals
bluesmoon
9
580
A better future with KSS
kneath
239
17k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
3k
How to Ace a Technical Interview
jacobian
279
23k
A designer walks into a library…
pauljervisheath
207
24k
The Power of CSS Pseudo Elements
geoffreycrofte
77
6k
Imperfection Machines: The Place of Print at Facebook
scottboms
268
13k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
44
2.5k
What's in a price? How to price your products and services
michaelherold
246
12k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
131
19k
Transcript
@cbetta @braintree_dev A Credit Card Walks into a Bar... by
Cristiano Betta 1 Developer Advocate @braintree_dev A talk on credit cards in eCommerce
@cbetta @braintree_dev A Credit Card Form Walks into a Bar...
A talk on credit cards in eCommerce
@cbetta @braintree_dev A Credit Card Form Walks into a Bar...
A talk on credit cards in eCommerce A series of bad jokes Developer Advocate @braintree_dev by Cristiano Betta
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev A Credit Card Walks into a Bar...
@cbetta @braintree_dev he says to the bartender, “I’ve been having
a hard time meeting people” the bartender says: “Wait, aren’t you supposed to be good at generating...”
@cbetta @braintree_dev “interest”
@cbetta @braintree_dev THANK YOU!
@cbetta @braintree_dev I <3 U Bucharest
@cbetta @braintree_dev A Credit Card Walks into a Bar_
@cbetta @braintree_dev I have a Cat
@cbetta @braintree_dev Who has a “special” condition
@cbetta @braintree_dev 14
@cbetta @braintree_dev But he thinks he is the king of
the house
@cbetta @braintree_dev
@cbetta @braintree_dev Actually he has a kidney condition
@cbetta @braintree_dev People always want to see more photos and
videos
@cbetta @braintree_dev especially kids
@cbetta @braintree_dev so...
@cbetta @braintree_dev I wrote an application that...
@cbetta @braintree_dev charges people money to see his face
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev I know what you are thinking...
@cbetta @braintree_dev I am an a**hole
@cbetta @braintree_dev I am actually raising money for his kidney
surgery
@cbetta @braintree_dev I promise!
@cbetta @braintree_dev
@cbetta @braintree_dev A Credit Card Form Walks into a Bar...
@cbetta @braintree_dev the bartender says, “Why do you keep coming
in here day after day ?” The credit card form looks at him miserably says “I’m just looking for some..."
@cbetta @braintree_dev “validation”
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev Things people should not do when building a
Credit Card Form
@cbetta @braintree_dev Things I think you should not do when
building a Credit Card Form
@cbetta @braintree_dev
@cbetta @braintree_dev baymard.com/lists/cart-abandonment-rate
@cbetta @braintree_dev 1.
@cbetta @braintree_dev Add a CAPTCHA
@cbetta @braintree_dev CAPTCHA Completely Automated Public Turing test to tell
Computers and Humans Apart
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev CAPTCHA Completely Automated Public Turing test to tell
Computers and Humans Apart
@cbetta @braintree_dev CAPTCHA Completely Automated Process That Causes Headaches and
Anger
@cbetta @braintree_dev 2.
@cbetta @braintree_dev Ask users to register
@cbetta @braintree_dev Ask users to register ...before purchasing
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev A Credit Card Form Walks into a Bar...
@cbetta @braintree_dev the bartender says, “I haven’t seen you in
a while!” The credit card form looks at him and says “Yeah, I had to go to jail. I was...”
@cbetta @braintree_dev “Charged with bad humour"
@cbetta @braintree_dev 3.
@cbetta @braintree_dev Ask me for the credit card type?
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev * totally copied from Wikipedia
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev jquerycreditcardvalidator.com
@cbetta @braintree_dev
@cbetta @braintree_dev creditcardjs.com
@cbetta @braintree_dev
@cbetta @braintree_dev I <3 Braintree
@cbetta @braintree_dev obviously...
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev github.com/braintree/card-validator
@cbetta @braintree_dev
@cbetta @braintree_dev 4.
@cbetta @braintree_dev C.V.Who?
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev jessepollak.github.io/card
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev kenkeiter.com/skeuocard
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev Hosted Fields
@cbetta @braintree_dev braintreepayments.com/features/hosted-fields
@cbetta @braintree_dev
@cbetta @braintree_dev 5.
@cbetta @braintree_dev You don’t format dates as they are on
my card
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev 6.
@cbetta @braintree_dev 6.
@cbetta @braintree_dev A Credit Card Form Walks into a Bar...
@cbetta @braintree_dev he tries to pick up someone at the
bar, They turn him down. The credit card form looks at the bartender and says “Well, this is awkward normally I’m the one who..."
@cbetta @braintree_dev “Declines”
@cbetta @braintree_dev 6.
@cbetta @braintree_dev You don’t validate my card number inline
@cbetta @braintree_dev Luhn Algorithm
@cbetta @braintree_dev 4217 6511 1111 1119
@cbetta @braintree_dev 4217 6511 1111 1119 9111 1111 1156 7124
@cbetta @braintree_dev 4217 6511 1111 1119 9111 1111 1156 7124
9212 1212 1213 7228
@cbetta @braintree_dev 14 + 6 + 11 + 19 =
50 4217 6511 1111 1119 9111 1111 1156 7124 9212 1212 1253 7228
@cbetta @braintree_dev 50 % 10 == 0 ? 4217 6511
1111 1119 14 + 6 + 11 + 19 = 50 9111 1111 1156 7124 9212 1212 1253 7228
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev 7.
@cbetta @braintree_dev 7.
@cbetta @braintree_dev 6b.
@cbetta @braintree_dev You don’t know your limits!
@cbetta @braintree_dev Card! Number of Digits! AMEX! 15! Visa! 13
or 16! MasterCard! 16! Discover! 16!
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev 7.
@cbetta @braintree_dev You don’t remember me
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev 8.
@cbetta @braintree_dev You remember too much
@cbetta @braintree_dev And then you lose my details!
@cbetta @braintree_dev 2014 Home Depot 56M JP Morgan Chase 76M
Staples 1.6M
@cbetta @braintree_dev Tokenization
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev One more joke?
@cbetta @braintree_dev A Credit Card Form Walks into a Bar...
@cbetta @braintree_dev the bartender says, “You are new to this
joint aren’t you?” The credit card form looks at him and says “Yeah, I just..."
@cbetta @braintree_dev “Discovered it”
@cbetta @braintree_dev
@cbetta @braintree_dev 9.
@cbetta @braintree_dev You have a “reset” button
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev 10.
@cbetta @braintree_dev Where was I again?
@cbetta @braintree_dev
@cbetta @braintree_dev
@cbetta @braintree_dev That’s all folks!
@cbetta @braintree_dev Encore?
@cbetta @braintree_dev An American Express Walks into a Bar in
Moscow...
@cbetta @braintree_dev the bartender says, “Sorry mate, You aren’t allowed
in here without a...”
@cbetta @braintree_dev “VISA”
@cbetta @braintree_dev
@cbetta @braintree_dev baddonationforms.tumblr.com
@cbetta @braintree_dev THANK YOU!
@cbetta @braintree_dev Cristiano Betta Developer Advocate Braintree_PayPal.
[email protected]
slideshare.net/cbetta braintreepayments.com
@braintree_dev @cbetta