The Lightning Network is Bitcoin's layer-2 payment rail: payments route through bidirectional channels instead of waiting for on-chain settlement, so they confirm in milliseconds at a fraction of on-chain fees. On U.CASH, Lightning is a first-class payment rail: checkouts can settle to a Lightning invoice you control, and payouts can go out over Lightning too. For on-chain Bitcoin payments and swaps, see the Bitcoin page.
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Payment channels over Bitcoin (layer 2). Settlement on U.CASH is non-custodial: every payment moves on-chain, direct to a wallet you control. Confirmation policy for Lightning Network: Invoices confirm on payment (near-instant); channel closes anchor to Bitcoin.
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The setup is deliberately short. One wallet capable of holding Lightning Network and a little BTC for gas on its chain, one receiving address for the output, and you have everything: a web3 name resolves to the address just as well as the raw string. Read the preview before signing, since it carries the whole trade at a glance, the amounts in and out, the fee, and the network cost. The wallet remains yours throughout and signs nothing you have not seen on screen, which is the whole security posture in one sentence.
Two costs, both visible up front. The platform charges a flat 0.50% all-in on the swap and nothing hidden behind it, no spread and no routing cut. The network charges its gas in BTC, settling with near-instant blocks on Payment channels over Bitcoin (layer 2), itemized per leg in the preview. What settles is on-chain to the address you chose, under this asset's policy of Invoices confirm on payment (near-instant); channel closes anchor to Bitcoin, and once confirmed the balance is entirely yours to move with no platform anywhere in the path.
Underneath, an instant integration executes the trade with all-or-nothing semantics: partial fills do not exist here, and a route unable to meet the bounds you approved reverts the whole transaction rather than settling something worse. Your exposure window between legs is therefore zero, the only cost of a failed attempt is its gas, and re-quoting is a click.
One account unlocks accept, swap, buy, and the rest of the U.CASH network across 35 networks.