Lagrange

The Lagrange Protocol is a cross-chain infrastructure that enables the creation of generalized state proofs across all major blockchains.

Applications that integrate with the Lagrange Protocol can enable applications to submit aggregated proofs of multi-chain states that can be verified in a non-interactive fashion by contracts on other chains.

Futaba can use this Lagrange as an Oracle to get the state root of various chains/rollups in a trustless manner.

What is the Lagrange ProtocolLagrange

The event received from the LightClient contract is used by the Lagrange-based Oracle to obtain the state proof of the Destination chain and return it to the LightClient contract, which stores the state root after successful verification and uses it to verify the account proof and storage proof received from the Relayer.