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What Rempart is

Rempart is a non-custodial comparator for cross-chain routes. It queries LI.FI, Relay, deBridge and Squid live and in parallel for the same swap, then ranks their routes by the minimum amount guaranteed to arrive, not by a headline rate. You execute the route you pick from your own wallet, signing directly to the executing protocol's contracts. Rempart never holds or relays your funds.

Reading the table

• Amount received and minimum guaranteed: the first is the provider's estimate, the second is the floor it commits to at your slippage setting. Ranking uses the guaranteed minimum, because that is the number you can count on.
• Fees: network gas plus the protocol's own fees, added up per route.
• Estimated duration: the provider's own estimate for the whole route, bridging included.
• Savings badge: what the best route gets you compared with the worst executable one for the same swap.
• Countdown: quotes expire. The timer shows how long the current comparison stays valid (each aggregator sets its own window) and the routes refresh on their own when it runs out.
• Details button: opens the full breakdown: gas, protocol fees, worst case at maximum slippage, and the individual steps of the route.

A route is only offered for signature if the contract its provider returns is on Rempart's allowlist for that provider. An address outside the list is blocked before it reaches your wallet.

Fees

Everything we can see, we show, including the fees we do not control. Some aggregators levy their own cut on the routes they return; that cut is surfaced and converted to USD rather than folded silently into the rate. Ranking happens on the guaranteed minimum, after all of it, so a route cannot come out ahead by hiding a fee instead of removing it. The same rule applies to us: if Rempart charges its own fee, it appears by name in the fee breakdown of every route, at the same rate for every provider, and the ranking already accounts for it.

Tokens

• The token catalogue comes from the aggregators themselves, so the list reflects what can actually be routed. A token they do not know would return no route.
• The "verified" badge means Rempart checked that contract on-chain itself: its decimals and symbol were read from the chain, not taken on trust.
• Every other token is checked on-chain the moment you select it. If its decimals or symbol disagree with the catalogue, or if the check cannot complete, the token is refused rather than accepted on a guess. A spoofed decimals value is a classic way to make an amount look far bigger than it is.
• The contract address is always shown and always links to the block explorer. Two tokens can share a name and a symbol; only the address is unique.

Chains and aggregators

Swaps are supported within and across these chains, using these aggregators.

FAQ

Do I need an account?

No. There is no sign-up, no email and no deposit address. Connecting a wallet is only needed to execute; comparing routes works without one.

Where is my history stored?

In your browser's localStorage, on this device only. It is not sent anywhere, and clearing it removes it for good.

What exactly am I signing?

A transaction to the executing protocol's contract plus, for an ERC-20, an approval covering the exact swap amount by default rather than an unlimited one. The destination address, the amount and the chain are shown before you sign.

Can a swap fail?

Yes. Cross-chain routes involve third-party protocols and can fail or be refunded on their side. Rempart does not execute the swap and cannot cancel or refund it; the status is tracked in the app and the source and destination transactions link to their explorers.