David Dunn

The type alias is defined as `Spin` further up. As an aside, is it worth renaming either `Spin` or `spin`? Having a capital as the only distinction could be confusing....

Proof verification optimisation for pallet-beefy-mmr

3

While looking into Ethereum gas optimisation for [Snowbridge](https://github.com/Snowfork/snowbridge), we noticed [one of OpenZeppelin's optimisations](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/MerkleProof.sol#L212) for proof verification. This amounts to sorting each pair of hashes before hashing them during proof...