package tezos-context

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Parameters
Signature

tezos-context
- Tezos_context
  - Context
    
    Checks
    
    Pack
    
    Integrity_check
    
    Integrity_check_index
    
    Integrity_check_inodes
    
    Reconstruct_index
    
    Stat
    
    S
    
    Tree
    
    Tree
  - Context_dump
    
    Dump_interface
    
    Block_header
    
    Commit_hash
    
    Kinded_hash
    
    Make
    
    I
    
    Block_header
    
    Commit_hash
    
    Kinded_hash
    
    S
  - Internal_for_tests
    
    Utils
    
    Arena
    
    Small_list
    
    String_set
tezos-context.encoding
- Tezos_context_encoding
  - Context
    
    Branch
    
    Commit
    
    Conf
    
    Contents
    
    Hash
    
    Metadata
    
    Node
    
    H
    
    M
    
    P
    
    Path
tezos-context.helpers
- Tezos_context_helpers
  - Context
    
    DB
    
    Branch
    
    Commit
    
    Contents
    
    Hash
    
    Head
    
    Key
    
    Metadata
    
    Private
    
    Branch
    
    Key
    
    Val
    
    Commit
    
    Key
    
    Node
    
    Contents
    
    Key
    
    Val
    
    Key
    
    Metadata
    
    Path
    
    Val
    
    Val
    
    Contents
    
    Key
    
    Val
    
    Node
    
    Contents
    
    Key
    
    Val
    
    Key
    
    Metadata
    
    Val
    
    Repo
    
    Slice
    
    Sync
    
    Repo
    
    Status
    
    Tree
    
    Contents
    
    Proof
    
    Make_tree
    
    DB
    
    Branch
    
    Commit
    
    Contents
    
    Hash
    
    Head
    
    Key
    
    Metadata
    
    Private
    
    Branch
    
    Key
    
    Val
    
    Commit
    
    Key
    
    Node
    
    Contents
    
    Key
    
    Val
    
    Key
    
    Metadata
    
    Path
    
    Val
    
    Val
    
    Contents
    
    Key
    
    Val
    
    Node
    
    Contents
    
    Key
    
    Val
    
    Key
    
    Metadata
    
    Val
    
    Repo
    
    Slice
    
    Sync
    
    Repo
    
    Status
    
    Tree
    
    Contents
    
    Proof
tezos-context.memory
- Tezos_context_memory
  - Context
    
    Tree
tezos-context.sigs
- Tezos_context_sigs
  - Context
    
    HASH_VERSION
    
    Kind
    
    S
    
    Tree
    
    TREE
    
    VIEW

Legend:
Library
Module
Module type
Parameter
Class
Class type

Parameters

module DB : DB

Signature

include Tezos_context_sigs.Context.TREE
  with type t := DB.t
   and type key := DB.key
   and type value := DB.contents
   and type tree := DB.tree

include Tezos_context_sigs.Context.VIEW
  with type t := DB.tree
   and type tree := DB.tree
  with type key := DB.key
  with type value := DB.contents

Getters

val mem : DB.tree -> DB.key -> bool Lwt.t

mem t k is an Lwt promise that resolves to true iff k is bound to a value in t.

val mem_tree : DB.tree -> DB.key -> bool Lwt.t

mem_tree t k is like mem but for trees.

val find : DB.tree -> DB.key -> DB.contents option Lwt.t

find t k is an Lwt promise that resolves to Some v if k is bound to the value v in t and None otherwise.

val find_tree : DB.tree -> DB.key -> DB.tree option Lwt.t

find_tree t k is like find but for trees.

val list : 
  DB.tree ->
  ?offset:int ->
  ?length:int ->
  DB.key ->
  (string * DB.tree) list Lwt.t

list t key is the list of files and sub-nodes stored under k in t. The result order is not specified but is stable.

offset and length are used for pagination.

Setters

val add : DB.tree -> DB.key -> DB.contents -> DB.tree Lwt.t

add t k v is an Lwt promise that resolves to c such that:

k is bound to v in c;
and c is similar to t otherwise.

If k was already bound in t to a value that is physically equal to v, the result of the function is a promise that resolves to t. Otherwise, the previous binding of k in t disappears.

val add_tree : DB.tree -> DB.key -> DB.tree -> DB.tree Lwt.t

add_tree is like add but for trees.

val remove : DB.tree -> DB.key -> DB.tree Lwt.t

remove t k v is an Lwt promise that resolves to c such that:

k is unbound in c;
and c is similar to t otherwise.

Folding

val fold : 
  ?depth:Tezos_context_sigs.Context.depth ->
  DB.tree ->
  DB.key ->
  order:[ `Sorted | `Undefined ] ->
  init:'a ->
  f:(DB.key -> DB.tree -> 'a -> 'a Lwt.t) ->
  'a Lwt.t

fold ?depth t root ~order ~init ~f recursively folds over the trees and values of t. The f callbacks are called with a key relative to root. f is never called with an empty key for values; i.e., folding over a value is a no-op.

The depth is 0-indexed. If depth is set (by default it is not), then f is only called when the conditions described by the parameter is true:

Eq d folds over nodes and contents of depth exactly d.
Lt d folds over nodes and contents of depth strictly less than d.
Le d folds over nodes and contents of depth less than or equal to d.
Gt d folds over nodes and contents of depth strictly more than d.
Ge d folds over nodes and contents of depth more than or equal to d.

If order is `Sorted (the default), the elements are traversed in lexicographic order of their keys. For large nodes, it is memory-consuming, use `Undefined for a more memory efficient fold.

val is_empty : DB.tree -> bool

is_empty t is true iff t is empty _.

val kind : DB.tree -> Tezos_context_sigs.Context.Kind.t

kind t is t's kind. It's either a tree node or a leaf value.

val to_value : DB.tree -> DB.contents option Lwt.t

to_value t is an Lwt promise that resolves to Some v if t is a leaf tree and None otherwise. It is equivalent to find t [].

val hash : DB.tree -> Tezos_crypto.Context_hash.t

hash t is t's Merkle hash.

val equal : DB.tree -> DB.tree -> bool

equal x y is true iff x and y have the same Merkle hash.

Caches

val clear : ?depth:int -> DB.tree -> unit

clear ?depth t clears all caches in the tree t for subtrees with a depth higher than depth. If depth is not set, all of the subtrees are cleared.

val pp : Stdlib.Format.formatter -> DB.tree -> unit

val empty : _ -> DB.tree

val of_value : _ -> DB.contents -> DB.tree Lwt.t

type raw = [

| `Value of DB.contents
| `Tree of raw Tezos_stdlib.TzString.Map.t

]

val raw_encoding : raw Tezos_base__TzPervasives.Data_encoding.t

val to_raw : DB.tree -> raw Lwt.t

val of_raw : raw -> DB.tree

type kinded_hash := [

| `Contents of Tezos_crypto.Context_hash.t
| `Node of Tezos_crypto.Context_hash.t

]

type repo = DB.repo

val make_repo : unit -> DB.repo Lwt.t

val shallow : DB.repo -> kinded_hash -> DB.tree

exception Context_dangling_hash of string

Exception raised by find_tree and add_tree when applied to shallow trees. It is exposed for so that the memory context can in turn raise it.