Course 05
Payments
How money actually moves, and what has to be true in your own database before you are entitled to call an order paid.
Written for someone whose product is about to have its first paying customer, or already does. You wired up a checkout that works; nobody told you what happens when the webhook arrives twice, or when the money comes back.
- 7
- modules
- 35
- lessons
- 47
- curated videos
- 14h 46m
- of video
How Money Actually Moves
Separate the four different events that 'the payment went through' collapses into one, and learn who in the chain is entitled to say no.
Becoming a Merchant & Choosing the Stack
Answer 'which provider' only after answering what kind of money flow this is, where it starts, where it lands, and who is legally selling.
Checkout & the First Payment
Take one real payment, and know exactly which parts of it an attacker controls.
Money in Your Database
The module this subject is actually about: what has to be true in your own tables before you are entitled to call an order paid.
Subscriptions, Usage & Recurring Money
Money that arrives again without anyone clicking anything, on two rails that authorise it in completely different ways.
Failure, Fraud & Disputes
The declines that were recoverable and you lost anyway, and the money that gets taken back after you have already delivered.
Platforms, Payouts & the Agentic Money Path
Money that passes through you on its way to somebody else, and money spent by something that is not a person.
Curated from 14 channels
Every video is a public YouTube video. We pick the single clearest explanation for each lesson and credit the channel that made it.