ln.university

Curriculum

Four strands, 14 lessons, about 2 hours of reading. A strand is a reading order through pages that also stand alone — there is nothing to enrol in, nothing is recorded, and no strand has to be finished to be useful.

Catalogue codes are real navigation rather than decoration. They appear in citations, so they are fixed once and then left alone: LN 100 fundamentals, LN 200 payments, LN 300 liquidity and fee policy, LN 400 operations.

A lesson's type is the column on the right. Reading is prose and diagrams. Measured carries at least one figure this operator measured, with its date and method. Model carries an interactive model that interpolates published figures and measures nothing — the distinction is laboured on purpose, because a model that reads like a measurement is the most dishonest thing an education site can ship.

LN 100 · Fundamentals · 7 lessons · about 71 min

What a channel is, what it can and cannot do, and why every later constraint follows from those two answers. Seven lessons, foundations only, no node required.

  1. 01 Channels are not accounts the constraint every later lesson is a consequence of Reading 9 min
  2. 02 Inbound and outbound, and why the asymmetry matters names the two sides the first lesson leaves you staring at Reading not written yet
  3. 03 Four ways to get inbound liquidity the practical answer to the problem lesson 2 defines Reading not written yet
  4. 04 An HTLC, in full how a payment crosses a channel it does not trust Reading not written yet
  5. 05 Routing is not sending chains the single-channel constraint into a path Reading not written yet
  6. 06 Fee policy as a control loop turns the cost in lesson 6 into a decision you can defend Model not written yet
  7. 07 When to close a channel the only lesson whose answer is sometimes 'stop' Reading not written yet
LN 300 · Liquidity & Fee Policy · 7 lessons · about 75 min

What liquidity costs, what it earns, and how to set a fee policy you can defend. Seven lessons; three of them carry measured figures rather than described ones.

  1. 01 Inbound and outbound, and why the asymmetry matters the constraint the rest of this strand is about pricing Reading not written yet
  2. 02 Four ways to get inbound liquidity names the options before any of them is priced Reading not written yet
  3. 03 What a rebalance actually costs prices the first option, from a payment log rather than a guess Measured not written yet
  4. 04 What capital costs, in bitcoin supplies the baseline every other price on this strand is measured against Measured 11 min
  5. 05 What inbound liquidity is worth prices the thing rebalancing substitutes for, using lesson 4's baseline Measured not written yet
  6. 06 Fee policy as a control loop turns three measured prices into one decision you make weekly Model not written yet
  7. 07 When to close a channel the only lesson on this strand whose answer is sometimes 'stop' Reading not written yet

Lessons not yet written appear in these lists with their titles and their place in the order. Following one before it exists gives a 404, which is a more honest signal than removing it and pretending the sequence is shorter than it is.