Classic channels are often single-funded. Dual funding lets both sides contribute at open. Splicing adjusts channel capacity later with an on-chain transaction without losing the channel relationship.
Complete Step 1 // Required reading in the study plan above, then continue here. This closes Channels & HTLCs.
Step 2 — Core idea: reshape capacity without teardown
Liquidity needs change. Closing and reopening wastes fees and downtime. Splicing and dual funding make the network more capital-efficient.
Analogy: Dual funding is both roommates paying the security deposit. Splicing is adding money to the joint jar (or withdrawing some) without ending the lease.
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Done when: You can say when dual-fund beats single-fund at open, and when splice beats close/reopen.
Step 3 — Decision brief (lab)
Write the dual-fund vs splice guide and check docs for your target implementation. Optional hands-on if your lab supports it.
Common mistakes
- Assuming splice always beats open/close without fee math
- Interrupting interactive funding flows mid-protocol
- Neglecting backup updates after capacity changes
Done when: Lab evidence (decision paragraph + support note + source) is complete. Complete the chapter quiz when prompted.
Next lesson
Liquidity Operations — loops, swaps, rebalancing, and inbound capacity.