Filmine is a protocol that allows storage providers (aka miners) on the Filecoin network to tap into liquidity provided by token holders staking FIL in the protocol. Filecoin does not currently support smart contracts so the logic lives on Ethereum while the protocol deploys the liquidity via multisigs and native actors (hardcoded protocol logic) to the miners contributing to Filecoin network.

Filmine v0.0.2 - Filecoin liquid staking showcase

How it's made

We have built our protocol on top of Filecoin and Polygon, we have used chainlink for cross-chain communication to retrieve state from Filecoin on the contracts living on Polygon. In the case on Filecoin we were able to upgrade FILSnap (Filecoin metamask) and made custom external adapters for chainlink keepers.