Ink is an Ethereum Layer 2 blockchain built on the OP Stack as part of the Superchain. It launched mainnet in 2024 with EVM compatibility and fast block times, using ETH as its native gas token for low-cost transactions.
Straight into the app: Swap ETH · Buy ETH · Get UCASH with ETH
Optimistic Rollup (OP Stack). Settlement on U.CASH is non-custodial: every payment moves on-chain, direct to a wallet you control. Confirmation policy for Ink: Credited with a confirmation policy tuned to the optimistic rollup's fast block production..
A single U Account works across accept, swap, and buy. Pick where to start.
Take ETH in checkout alongside cards on 35 networks. White-label, non-custodial, live in minutes.
Trade ETH for any asset across the network, routed for the best price.
Get ETH with any asset you hold, one step, settled to your wallet.
Receive, hold, and settle ETH your way.
Tokens you can swap, accept, and settle on this network.
The leading smart-contract blockchain and home of ERC-20.
Ethereum L2 built on the OP Stack.
Leading Ethereum L2 by activity.
EVM sidechain built for fast, cheap payments.
Consumer-focused Ethereum ZK L2.
Ethereum L2 and home of the OP Stack.
The setup is deliberately short. One wallet capable of holding Ink and a little ETH 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 ETH, settling with about 2 sec blocks on Optimistic Rollup (OP Stack), itemized per leg in the preview. What settles is on-chain to the address you chose, under this asset's policy of Credited with a confirmation policy tuned to the optimistic rollup's fast block production., and once confirmed the balance is entirely yours to move with no platform anywhere in the path.
Underneath, the aggregated DEX route 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.