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Separate on-chain custody and payment-channel liquidity
Useful first : Hot, warm and cold wallets · Bitcoin UTXOs explained · Bitcoin fees, mempool and confirmations
Reading path · 8 / 41 · Intermediate
A recovery phrase can reconstruct the keys of a deterministic wallet.
The essentials
A recovery phrase can reconstruct the keys of a deterministic wallet. Someone who obtains it may be able to spend the funds. A hardware wallet isolates signing, but users still need to inspect the destination and relevant details on its trusted screen.
How it works
Multisignature requires a defined set of signatures, for example two out of three. It reduces dependence on one key but adds backup and coordination requirements. Recovery may need wallet descriptors or equivalent policy information as well as keys. Test the full recovery arrangement before depending on it.
What to watch
Lightning uses payment channels whose participants update allocations off-chain, with opening and closing anchored to Bitcoin. Routing, liquidity, monitoring and the use of custodial providers affect the experience. A Lightning payment differs from a base-layer transaction; channel capacity is not automatically spendable in every direction or to every recipient.
Understand the details
Self-custody means controlling the material and policy needed to spend; an exchange balance is generally a claim within a provider’s system. Lightning channels instead lock funds on-chain and update balances through signed off-chain states. Routing can use multiple channels without making the recipient share a direct channel with the sender.
Boundaries and common mistakes
A channel’s capacity is not identical to its available outbound or inbound liquidity. Payment success depends on direction, routes and current conditions. Channel monitoring, backups and closure behavior matter; a static seed backup alone may not restore every channel state. A custodial Lightning app can simplify operation while reintroducing provider dependence.
The mechanism at a glance
- 01Funding on-chain
- 02Signed balance updates
- 03Directional routing liquidity
- 04Closure settles on-chain
Read these as connected concepts, not necessarily consecutive steps.
Read the explanation
Self-custody means controlling the material and policy needed to spend; an exchange balance is generally a claim within a provider’s system. Lightning channels instead lock funds on-chain and update balances through signed off-chain states. Routing can use multiple channels without making the recipient share a direct channel with the sender.
Put the mechanism into context
A channel has capacity 100 units, with 90 on your side and 10 on the peer’s side. Ignore fees and reserves for this illustration. Compare sending 20 with receiving 20 through that single channel. Draw the balances before and after each possible payment.
Apply it in the workshop →What this mechanism does not guarantee
A channel’s capacity is not identical to its available outbound or inbound liquidity. Payment success depends on direction, routes and current conditions. Channel monitoring, backups and closure behavior matter; a static seed backup alone may not restore every channel state. A custodial Lightning app can simplify operation while reintroducing provider dependence.
The distinction that changes the analysis
A payment channel can contain value while lacking usable capacity in the direction of your intended payment. Distinguish total channel funds, your spendable side and the rest of the route. Holding keys and finding a liquid payment path answer different questions.
Explain it yourself
Revisit the case above. Name what is established, what remains to be checked and the evidence needed to conclude. A strong answer addresses both sides of the diagram.
Apply the lesson to a case
A channel has capacity 100 units, with 90 on your side and 10 on the peer’s side. Ignore fees and reserves for this illustration. Compare sending 20 with receiving 20 through that single channel. Draw the balances before and after each possible payment.
You have enough local balance to send 20, but the peer has only 10 to send toward you. Total capacity alone cannot answer a directional liquidity question. Real implementations add routing, reserve and fee constraints. Explain separately who controls keys and who provides liquidity; those are different responsibilities.
Terms in this lesson
- Multisig
- A spending policy requiring several signatures, such as two of three authorised keys.
Prepare a correction note
Describe the passage and the proposed correction. This creates a local note for you to share; it sends nothing. Do not include personal or confidential information.