Fix for the case where the final proof element is less than 32 bytes and the element exists
inside of a branch node. Current implementation of the onchain MPT contract can't handle this
natively so we instead append an extra proof element to handle it instead.
Fix for the case where the final proof element is less than 32 bytes and the element exists inside of a branch node. Current implementation of the onchain MPT contract can't handle this natively so we instead append an extra proof element to handle it instead.