Ethereum

What happens in an optimistic cross chain bridge (like Across) if the source chain re-orgs? 

If L1 finality takes a few minutes, how is across able to get funds to destination chain faster than that? What happens if L1 re-orgs due to a soft fork and worst case the deposit never happened?

haardik.dev | Founder @learnweb3 | lead instructor /uniswaphooks | building @openfarcaster

Mini apps will eat the internet | Latest drop: /clankermon | Building : /large /fctrivia /miniapps /flappycaster /jeeves /source @degentip @playsource /jump

rip - so they can lose an arbitrary amount of money if L1 re-orgs?

its just two relayers with asset pools on either side, nothing actually bridges 

Worst case scenario the relayer provider loses funds

Ethereum enthusiast exploring frontier of layer 2s, gamefi, and decentralized apps. Read my latest thoughts at https://paragraph.xyz/@non-fungiblethoughts/

so worst case a 100 mil $ bridge happens, gets re=orged, and relayers are rekt?

Across is basically loaning you money to speed up your bridge. If the system reorgs on them its like they gave out a bad loan and it doesnt get paid back. The relayers are taking the risk of settlement not completing as they expect.