https://en.bitcoin.it/w/index.php?action=history&feed=atom&title=Just-in-time_channel 2026-09-12T06:15:12Z Revision history for this page on the wiki MediaWiki 1.43.9 https://en.bitcoin.it/w/index.php?title=Just-in-time_channel&diff=71251&oldid=prev 2026-09-12T03:16:32Z

<p>Create Just-in-time channel stub (LSP / LSPS2 JIT open)</p> <p><b>New page</b></p><div>A &#039;&#039;&#039;just-in-time channel&#039;&#039;&#039; (JIT channel) is a [[Lightning Network]] channel that a Lightning service provider (LSP) opens in response to an incoming payment for a client that does not yet have inbound capacity. The LSP holds the first payment, funds a new channel, then forwards the HTLC into that channel so a new user can receive without first opening a channel or buying inbound liquidity.<br /> <br /> JIT channels should not be confused with just-in-time routing, which rebalances existing channels so a payment that would otherwise fail for lack of local liquidity can be accepted.<br /> <br /> Receiving on Lightning needs inbound capacity: a channel where the remote side holds enough balance (and a free HTLC slot) to carry the payment. A new wallet has neither. A JIT open treats the incoming payment as the event that creates the channel. Negotiation is commonly specified by LSPS2 (bLIP-52). The open usually depends on zero-confirmation channel features (&lt;code&gt;option_zeroconf&lt;/code&gt; and &lt;code&gt;option_scid_alias&lt;/code&gt;) so peers can use a short-channel-id alias before the funding transaction confirms. See also [[Zero-confirmation transaction]].<br /> <br /> In outline: the client gets JIT parameters from an LSP and embeds a reserved SCID in invoice routing hints. When a matching payment arrives, the LSP holds the HTLC, opens an often-unannounced channel with the client, funds it (crediting the payment minus any opening fee), and forwards the HTLC so the client can settle with the preimage. Without extra on-chain contracts, the first open typically requires trusting the LSP for that handshake. After a channel exists, later capacity changes are often done with [[Splicing]] rather than more JIT opens. Related liquidity tooling includes [[Dual funding]].<br /> <br /> == See also ==<br /> * [[Lightning Network]]<br /> * [[Dual funding]]<br /> * [[Splicing]]<br /> * [[Zero-confirmation transaction]]<br /> <br /> == External links ==<br /> * [https://bitcoinops.org/en/topics/jit-channels/ Bitcoin Optech: Just-In-Time (JIT) channels]<br /> * [https://github.com/BitcoinAndLightningLayerSpecs/lsp Lightning Service Provider specifications (incl. LSPS2)]<br /> <br /> [[Category:Technical]]</div>

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