Multipath payments split one logical payment across several HTLC paths that share a payment secret/hash scheme so the receiver can reassemble atomically.
Complete Step 1 // Required reading in the study plan above, then continue here.
Step 2 — Core idea: several vans beat one blocked truck
Large payments often cannot fit through one channel’s available balance. MPP raises success rates and effective capacity without opening enormous channels.
Analogy: Moving a couch through a city — sometimes three smaller vans beat one truck that does not fit the alley.
Loading diagram…
Done when: You can explain atomic reassembly at the receiver in one sentence.
Step 3 — When to split (lab)
Write the product rationale and feature-support note. Optional hands-on if your lab supports MPP.
Done when: Lab evidence (rationale + support note + source) is complete.
Next lesson
Failure Handling — retries, error onions, and safe refund UX.