Portal Bridge
U.CASH Infrastructure · U.CASH Bridge

Move UCASH across networks.

Bridge UCASH between Ethereum, Base, and Polygon over trustless canonical rails. Your wallet signs every transaction. We never hold your funds.

Open the Bridge → About UCASH
3
networks
1:1
canonical
100%
non-custodial
14s
finality
Ethereum Base (OP Stack) Polygon (PoS) 1:1 canonical In-app claims Non-custodial
What it is

The UCASH cross-chain bridge, no custody

U.CASH Bridge is the non-custodial cross-chain bridge for the UCASH token, linking Ethereum (the root of supply) with Base and Polygon. Every transfer runs on each network's own canonical bridge contracts, lock-and-mint or burn-and-release, so UCASH moves between your wallet and the protocol directly with no intermediary custody. Built for UCASH holders who want to use the token across L2s without surrendering self-custody.

How it works

Connect, route, send, claim

Connect your wallet

Connect any EVM wallet. Desktop uses an injected wallet directly; mobile falls back to a WalletConnect QR code.

Pick a route

Select the source and destination network. The engine resolves the correct canonical rail, the expected steps, and the ETA for the pair.

Approve and send

For deposits your wallet approves then calls the L1 bridge (Base depositERC20To or Polygon depositFor). For exits it triggers the L2 withdraw or burn.

Wait for finalization

Deposits land as the L2 mint confirms. Reverse routes wait on their security window: the Base 7-day OP challenge period, or the Polygon PoS checkpoint.

Claim in-app

When ready, claim your UCASH on Ethereum without leaving the app. Base exits prove and finalize through the OP portal; Polygon exits submit the checkpoint proof to the RootChainManager.

Track arrival

For deposits the destination balance is polled until the mint lands, then the step flips to arrived and your history updates instantly.

Routes & timing

Six routes, three networks

Every direction over its native canonical rail. Deposits auto-credit; reverse routes claim in-app once the security window closes.

Route
Rail
ETA
In-app claim
Ethereum to Base
Base canonical (OP deposit)
~2-5 min
auto-credits
Ethereum to Polygon
Polygon PoS deposit
~7-8 min
auto-credits
Base to Ethereum
OP Stack withdrawal
~7 days
prove + finalize
Polygon to Ethereum
Polygon PoS burn + exit
~30-90 min
checkpoint claim
Base to Polygon
Two-hop via Ethereum
~7 days
resumes per leg
Polygon to Base
Two-hop via Ethereum
~1-2 hours
resumes per leg
1:1 lock-and-mint No bridge fee Gas only Non-custodial
Capabilities

What U.CASH Bridge can do

Three networks, six routes

UCASH across Ethereum, Base, and Polygon in both directions, each over its native canonical rail.

Two-hop lateral routing

No direct bridge between Base and Polygon, so lateral moves route through Ethereum in two trustless hops, with state saved per leg to resume later.

In-app Optimism exit

Base to Ethereum withdrawals prove and finalize against the OP portal in-app, so you never bounce to an external bridge to finish.

In-app Polygon PoS exit

Polygon exits fetch the checkpoint proof and call RootChainManager.exit from the same screen once the checkpoint lands.

Strictly non-custodial

Your wallet signs every transaction against the canonical bridge contracts. UCASH never touches a U.CASH-controlled account.

Arrival polling

The destination balance is watched until the mint lands, then the route step advances to arrived with no manual refresh.

Persistent history

Signed-in sessions log every bridge and claim to a per-account ledger; wallet-only sessions keep an identical local view.

One U Account

U.CASH SSO ties your bridges to your account and surfaces your portal avatar, while wallet connect still works signed out.

Mobile-first

WalletConnect QR for mobile, a compact panel layout, and direct injected-wallet flow on desktop.

How it fits in U.CASH

Bridge and the rest of the network

Get UCASH where you need it, then spend or swap it across the U.CASH apps.

Layer 2sBase · OP StackPolygon · PoS
→←canonical 1:1
EthereumUCASH root of supply
FAQ

Questions, answered

Is U.CASH Bridge custodial? Can I lose my funds?
No. It is non-custodial. Every transaction is signed by your own wallet against each network's canonical bridge contracts. U.CASH never holds your UCASH. On the reverse routes a claim can only fail if submitted before the window closes; it never burns or loses funds, it simply reverts and you retry.
Which networks are supported?
UCASH bridges between Ethereum (the root of supply), Base (OP Stack), and Polygon (PoS). All six ordered routes are covered, including lateral Base to Polygon moves via Ethereum.
Why do withdrawals to Ethereum take longer?
Withdrawals inherit the destination chain's security model. Base exits wait roughly 7 days for the OP Stack challenge window, and Polygon exits wait for the next PoS checkpoint, around 30 to 90 minutes. Deposits onto an L2 are fast, minutes.
Do I have to leave the app to claim?
No. Base to Ethereum prove and finalize and Polygon to Ethereum checkpoint exits are claimed in-app. The official Base and Polygon portals remain as a fallback if an in-app step will not complete.
Do I get the same amount of UCASH on the other side?
All canonical rails are 1:1 lock-and-mint or burn-and-release on the bridged amount. You pay only network gas; there is no bridge fee or slippage on the UCASH amount.
Do I need a U Account to use it?
No. Wallet connect works without signing in. A U Account via SSO adds persistent cross-device history and your profile avatar, but it is optional.
How does a Base to Polygon move work?
There is no direct canonical bridge between two independent L2s, so it routes through Ethereum in two trustless hops. The wizard saves your progress per leg so you can reload or return after the 7-day OP window and resume exactly where you left off.
What wallets can I connect?
Any EVM wallet. On desktop an injected wallet such as MetaMask, Rabby, or Brave connects directly. On mobile the WalletConnect QR modal pairs your wallet app.

Move your UCASH where you need it

Bridge between Ethereum, Base, and Polygon over canonical rails. Your wallet, your keys, your funds.

Open the Bridge → About UCASH