About 10 minutes with practice. You only need something to take notes with. No real wallet details or payments are part of this lesson.
Course contents · Lesson 5 of 21
- Bitcoin without jargon · Marked complete
- Keys, custody and keeping control · Marked complete
- Payments for humans, including Lightning · Marked complete
- Money, prices and units · Marked complete
- Follow a payment from request to receipt · Marked complete
- Addresses, networks and QR codes · Marked complete
- Confirmations and patience · Marked complete
- Fees buy scarce block space · Marked complete
- Backups before dependence · Marked complete
- Scams, urgency and trusted routes · Marked complete
- Privacy is a practice · Marked complete
- Custody is a relationship · Marked complete
- Reading a Lightning invoice · Marked complete
- Exchanges and access to bitcoin · Marked complete
- Volatility and practical planning · Marked complete
- A fair invoice for creative work · Marked complete
- Donations with accountable purpose · Marked complete
- Proof of work and honest energy questions · Marked complete
- Bitcoin and Litecoin: related ideas, separate networks · Marked complete
- Read Bitcoin news with a source trail · Marked complete
- Capstone: welcome a newcomer safely · Marked complete
What you will learn
- Describe authorization, broadcast and settlement.
- Identify the recipient’s evidence of payment.
A request is not a transfer
An invoice states what a recipient would like to receive. It may contain an amount, destination, expiry and order reference. Opening or copying it does not move money. A wallet can construct a proposed transaction from spendable outputs; an authorized signer must then approve the transaction. The application’s appearance is not evidence that authorization occurred.
Broadcast is the beginning of a network journey
Once broadcast, an on-chain transaction can propagate between nodes and may be selected by a miner for a block. Different wallets and services can observe it at different times. A delay can reflect connectivity, policy, fees or competing transactions. A transaction identifier helps locate a particular record, but its presence on an explorer does not establish that the recipient’s settlement conditions have been met.
Close the loop with the recipient
For a fictional design commission, the artist checks the invoice in their own receiving system and follows the agreed confirmation policy before delivery. A buyer’s screenshot is useful context, not the authoritative receipt. Keep the order reference and payment state separate from the file-delivery record. If something disagrees, compare those records through a known contact route before attempting another payment.
Practice on paper
Arrange these fictional events: the buyer approves; the artist creates an invoice; a block includes the transaction; the wallet broadcasts; the artist records settlement under their policy.
Reveal the worked answer
Invoice → approval → broadcast → block inclusion → settlement check. A particular policy can require more confirmations. The invoice and approval alone do not prove that the artist received usable funds.
Check your understanding
Choose an answer in your head or on paper, then reveal the explanation. Retry whenever you like. Answers are not submitted or scored; completion marks are your own learning notes.
1. Does opening an invoice transfer funds?
- Yes
- No
Reveal answer 1
No. A request and authorization are separate.
2. Which record should an artist verify?
- Only the buyer’s screenshot
- Their own receiving record and settlement conditions
Reveal answer 2
Their own record. Screenshots can be mistaken or fabricated.
Take this with you
Track a payment’s state before deciding what happens next.
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