Canonical rollup bridges are the safest way to move between Ethereum and an L2 — they inherit the rollup's own security — and they are slow, particularly the seven-day challenge period on optimistic rollups. Hop keeps the canonical settlement and removes the wait.
How the bonder model works
A bonder posts collateral and immediately sends you the equivalent amount on the destination chain, taking on the delay themselves. Behind the scenes, the transfer settles through the canonical bridge at its own pace and the bonder is reimbursed. Your funds are never secured by a new committee — the underlying trust assumption remains the rollup's own.
What can go wrong
If bonder liquidity is unavailable on your route, the transfer falls back to canonical timing. Hop's own contracts have operated without exploit since 2021. The AMM component used for cross-rollup transfers of the same asset carries ordinary liquidity risk, priced into the fee.
Cost and coverage
Roughly 0.04% to 0.1% plus a bonder fee and gas. Coverage is Ethereum and its major rollups only — no Solana, no alt-L1s.
Who should use it
Anyone moving assets between Ethereum rollups who wants speed without adding a bridge trust assumption. It is a narrower product than Across and structurally conservative in a way that deserves credit.