The tree depth of a fold. See the fold function for more information.

Tree provides immutable, in-memory partial mirror of the context, with lazy reads and delayed writes. The trees are Merkle trees that carry the same hash as the part of the context they mirror.

Tezos-specific proof types, as opposed to proofs provided by Irmin. These types are used only by the light mode and it is recommended to avoid extending their usage: only the light mode should use them.

TEZOS_CONTEXT is the module type implemented by all storage implementations. This is the module type that the shell expects for its operation. As such, it should be a strict superset of the interface exposed to the protocol (see module type S above and Tezos_protocol_environment.Environment_context_intf.S).

Functor `With_get_data` adds a `get_data` function to modules of signature `S`. Note that the partially applied `get_data kind key` function has the correct type to be provided to produce,verify_tree_proof, which is its intended goal.