Stablecoin · Optimism

Dai on Optimism (DAI)

Dai (DAI) is a decentralized US-dollar stablecoin on Ethereum, designed to track one US dollar and backed by collateral held in smart contracts rather than by a single issuer. It is a long-standing staple of decentralized payments and DeFi. On Optimism, DAI moves as a ERC-20 token: transfers pay Optimism network fees in ETH and settle with the network's own finality. Every U.CASH rail that runs on Optimism, from checkout to swap, supports DAI natively on this chain.

Swap DAI on Optimism → Buy DAI

Open in the app: Swap · Buy · Get UCASH

Dai on Optimism at a glance

Network
Optimism
Standard
ERC-20 token
Block time
~2 seconds
Consensus
Optimistic Rollup (OP Stack)

DAI transfers confirm with the Optimism network (~2 seconds blocks). Settlement on U.CASH is non-custodial: every payment and swap moves on-chain, direct to a wallet you control.

Dai on Optimism contract addresses

Dai on Optimism (DAI) is a token. Always verify the address before trading.

Optimism0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1

Use DAI on Optimism

Every action opens with DAI already selected.

Swap DAI

Best-price routing from Optimism into any asset, cross-chain included, in one signed transaction.

Open the swap →

Buy DAI

Card or bank where the fiat rails serve Optimism, or swap from any asset you already hold.

Buy DAI →

Get UCASH with DAI

Pay DAI from Optimism and receive UCASH, the U.CASH network token, non-custodial.

Get UCASH →

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Dai on Optimism: FAQ

What is the DAI contract address on Optimism?
0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1. It is the verified ERC-20 token deployment listed above with its explorer link. Always check the address before you trade or accept DAI on Optimism.
How do I swap DAI on Optimism?
Open swap.u.cash/dai-optimism and the pair arrives prefilled: DAI on Optimism as the asset you pay. Pick what you want to receive, confirm the route, and your wallet signs one transaction.
How fast are DAI transfers on Optimism?
Optimism runs Optimistic Rollup (OP Stack) with ~2 seconds blocks, and DAI settles with the network. U.CASH watches confirmations per your checkout policy.
Can I move DAI from Optimism to another network?
Yes. The same swap screen routes cross-chain in one signed transaction: choose a destination network and the router bridges alongside the trade, so the output lands as DAI (or any asset you pick) on the other chain.
What does it cost to use DAI on Optimism?
You pay the Optimism network fee in ETH for each transfer. Swaps carry a flat, transparent fee shown before you confirm; there are no spreads or hidden routing cuts.
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Dai on Optimism, your keys

Swap, buy, and settle DAI on Optimism non-custodial, straight to the wallet you control.

Swap DAI on Optimism → Buy DAI