Lightning for Builders Security and next steps

Conclusion: what to build next

You have run every layer of Lightning yourself. Where the protocol is heading, and how to turn what you learned into a tool people use.

15 minIntermediate17 / 17

Draft: this lesson is still waiting for review.

What you'll learn

Summarise the path from a single channel to a network of private payments
Name three areas where Lightning is still changing
Choose a project to build and share

Key terms

Lightning Network (mtandao wa Lightning): A network on top of Bitcoin for fast payments with very small fees.
open source (programu huria): Software whose code anyone can read, check and improve.

You started with one invoice. Since then you have opened and closed channels, followed a payment through HTLCs, built an onion, read the gossip graph, written a route finder, parsed raw messages, decoded invoices and probed a balance, all on real nodes.

Where Lightning is heading

Better payment formats. BOLT 12 offers, blinded paths that hide the receiver, and async payments for phones that are often offline.
Easier liquidity. Splicing (resizing a channel without closing it), dual-funded channels, and liquidity markets.
Communities and custody. Fedimint and ecash bring Lightning to groups that share trust, like chamas, without each member running a node.

Build something

The Lightning Network is open source, and so is everything in this lab. The best way to keep learning is to ship a small tool and get feedback:

Pick a brief from the builders path's final project, such as a chama tip jar, a UTXO explainer or an offline sats calculator, or invent your own.
Build it against this lab: it's the same regtest network you already know.
Share the repository in the Bitsacco community and ask for a review.

Reflect

Write your answer down, or talk it over with a friend or your chama.

Which lesson changed how you think about Lightning the most?
What small tool would make Lightning easier for a chama to use?