package tezos-context

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Generic interface
Accessing and Updating Versions
Predefined Fields
Context dumping

tezos-context
- Tezos_context
  - Context
    
    Block_data_legacy
    
    Protocol_data_legacy
    
    Pruned_block_legacy
    
    S
    
    Tree
    
    Tree
  - Context_dump
    
    Make
    
    I
    
    Block_header
    
    Commit_hash
    
    Make_legacy
    
    I
    
    Block_data
    
    Block_header
    
    Commit_hash
    
    Protocol_data
    
    Pruned_block
  - Context_dump_intf
    
    Context_dump
    
    Make
    
    I
    
    Block_header
    
    Commit_hash
    
    Context_dump_legacy
    
    Make_legacy
    
    I
    
    Block_data
    
    Block_header
    
    Commit_hash
    
    Protocol_data
    
    Pruned_block
    
    Dump_interface
    
    Block_header
    
    Commit_hash
    
    Dump_interface_legacy
    
    Block_data
    
    Block_header
    
    Commit_hash
    
    Protocol_data
    
    Pruned_block
    
    S
    
    S_legacy
tezos-context.encoding
- Tezos_context_encoding
  - Context
    
    Branch
    
    Commit
    
    H
    
    Conf
    
    Contents
    
    Hash
    
    Metadata
    
    Node
    
    H
    
    M
    
    P
    
    Path
tezos-context.helpers
- Tezos_context_helpers
  - Context
    
    DB
    
    Branch
    
    Commit
    
    Contents
    
    Hash
    
    Head
    
    History
    
    E
    
    V
    
    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
    
    Make_tree
    
    DB
    
    Branch
    
    Commit
    
    Contents
    
    Hash
    
    Head
    
    History
    
    E
    
    V
    
    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
tezos-context.memory
- Tezos_context_memory
  - Context
    
    Tree
tezos-context.sigs
- Tezos_context_sigs
  - Context
    
    S
    
    Tree
    
    TREE
    
    VIEW

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Library
Module
Module type
Parameter
Class
Class type

Tezos - Versioned, block indexed (key x value) store

type Tezos_base__TzPervasives.error +=

| Cannot_create_file of string
| Cannot_open_file of string
| Cannot_find_protocol
| Suspicious_file of int

Generic interface

module type S = sig ... end

include S

include Tezos_context_sigs.Context.VIEW
  with type key = string list
   and type value = bytes

type t

The type for context views.

type key = string list

The type for context keys.

type value = bytes

The type for context values.

type tree

The type for context trees.

Getters

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

mem_tree t k is like mem but for trees.

val find : t -> key -> value 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 : t -> key -> tree option Lwt.t

find_tree t k is like find but for trees.

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

add_tree is like add but for trees.

val remove : t -> key -> t 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:[ `Eq of int | `Le of int | `Lt of int | `Ge of int | `Gt of int ] ->
  t ->
  key ->
  init:'a ->
  f:(key -> tree -> 'a -> 'a Lwt.t) ->
  'a Lwt.t

fold ?depth t root ~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.

Elements are traversed in lexical order of keys.

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.

module Tree : sig ... end

type context = t

type index

A block-indexed (key x value) store directory.

val init : 
  ?patch_context:
    (context -> (context, Tezos_error_monad.TzCore.error list) result Lwt.t) ->
  ?readonly:bool ->
  string ->
  index Lwt.t

Open or initialize a versioned store at a given path.

val close : index -> unit Lwt.t

Close the index. Does not fail when the context is already closed.

val sync : index -> unit Lwt.t

Sync the context with disk. Only useful for read-only instances. Does not fail when the context is not in read-only mode.

val compute_testchain_chain_id : 
  Tezos_crypto.Block_hash.t ->
  Tezos_crypto.Chain_id.t

val compute_testchain_genesis : 
  Tezos_crypto.Block_hash.t ->
  Tezos_crypto.Block_hash.t

val commit_genesis : 
  index ->
  chain_id:Tezos_crypto.Chain_id.t ->
  time:Tezos_base.Time.Protocol.t ->
  protocol:Tezos_crypto.Protocol_hash.t ->
  (Tezos_crypto.Context_hash.t, Tezos_error_monad.TzCore.error list) result
    Lwt.t

val commit_test_chain_genesis : 
  context ->
  Tezos_base.Block_header.t ->
  Tezos_base.Block_header.t Lwt.t

val merkle_tree : 
  t ->
  Tezos_shell_services.Block_services.merkle_leaf_kind ->
  key ->
  Tezos_shell_services.Block_services.merkle_tree Lwt.t

merkle_tree t leaf_kind key returns a Merkle proof for key (i.e. whose hashes reach key). If leaf_kind is Block_services.Hole, the value at key is a hash. If leaf_kind is Block_services.Raw_context, the value at key is a Block_services.raw_context. Values higher in the returned tree are hashes of the siblings on the path to reach key.

Accessing and Updating Versions

val restore_integrity : 
  ?ppf:Format.formatter ->
  index ->
  (int option, Tezos_error_monad.TzCore.error list) result

restore_integrity ppf index attempts to restore the context integrity of index. Returns None when nothing needs to be fixed and Some n with n the number of entries fixed. If needs be, the progress might be printed via ppf If the context integrity cannot be restored, Failure msg is thrown.

val exists : index -> Tezos_crypto.Context_hash.t -> bool Lwt.t

val checkout : index -> Tezos_crypto.Context_hash.t -> context option Lwt.t

val checkout_exn : index -> Tezos_crypto.Context_hash.t -> context Lwt.t

val hash : 
  time:Tezos_base.Time.Protocol.t ->
  ?message:string ->
  t ->
  Tezos_crypto.Context_hash.t

val commit : 
  time:Tezos_base.Time.Protocol.t ->
  ?message:string ->
  context ->
  Tezos_crypto.Context_hash.t Lwt.t

val set_head : 
  index ->
  Tezos_crypto.Chain_id.t ->
  Tezos_crypto.Context_hash.t ->
  unit Lwt.t

val set_master : index -> Tezos_crypto.Context_hash.t -> unit Lwt.t

Predefined Fields

val get_protocol : context -> Tezos_crypto.Protocol_hash.t Lwt.t

val add_protocol : context -> Tezos_crypto.Protocol_hash.t -> context Lwt.t

val get_test_chain : context -> Tezos_base.Test_chain_status.t Lwt.t

val add_test_chain : context -> Tezos_base.Test_chain_status.t -> context Lwt.t

val remove_test_chain : context -> context Lwt.t

val fork_test_chain : 
  context ->
  protocol:Tezos_crypto.Protocol_hash.t ->
  expiration:Tezos_base.Time.Protocol.t ->
  context Lwt.t

val clear_test_chain : index -> Tezos_crypto.Chain_id.t -> unit Lwt.t

val find_predecessor_block_metadata_hash : 
  context ->
  Tezos_crypto.Block_metadata_hash.t option Lwt.t

val add_predecessor_block_metadata_hash : 
  context ->
  Tezos_crypto.Block_metadata_hash.t ->
  context Lwt.t

val find_predecessor_ops_metadata_hash : 
  context ->
  Tezos_crypto.Operation_metadata_list_list_hash.t option Lwt.t

val add_predecessor_ops_metadata_hash : 
  context ->
  Tezos_crypto.Operation_metadata_list_list_hash.t ->
  context Lwt.t

Context dumping

module Protocol_data_legacy : sig ... end

module Block_data_legacy : sig ... end

module Pruned_block_legacy : sig ... end

val dump_context : 
  index ->
  Tezos_crypto.Context_hash.t ->
  fd:Lwt_unix.file_descr ->
  (int, Tezos_error_monad.TzCore.error list) result Lwt.t

val restore_context : 
  index ->
  expected_context_hash:Tezos_crypto.Context_hash.t ->
  nb_context_elements:int ->
  fd:Lwt_unix.file_descr ->
  (unit, Tezos_error_monad.TzCore.error list) result Lwt.t

val legacy_restore_context : 
  ?expected_block:string ->
  index ->
  snapshot_file:string ->
  handle_block:
    (Tezos_shell_services.History_mode.Legacy.t ->
      (Tezos_crypto.Block_hash.t * Pruned_block_legacy.t) ->
      (unit, Tezos_error_monad.TzCore.error list) result Lwt.t) ->
  handle_protocol_data:
    (Protocol_data_legacy.t ->
      (unit, Tezos_error_monad.TzCore.error list) result Lwt.t) ->
  block_validation:
    (Tezos_base.Block_header.t option ->
      Tezos_crypto.Block_hash.t ->
      Pruned_block_legacy.t ->
      (unit, Tezos_error_monad.TzCore.error list) result Lwt.t) ->
  (Tezos_base.Block_header.t
   * Block_data_legacy.t
   * Tezos_crypto.Block_metadata_hash.t option
   * Tezos_crypto.Operation_metadata_hash.t list list option
   * Tezos_base.Block_header.t option
   * Tezos_shell_services.History_mode.Legacy.t,
    Tezos_error_monad.TzCore.error list)
    result
    Lwt.t

val legacy_read_metadata : 
  snapshot_file:string ->
  (string * Tezos_shell_services.History_mode.Legacy.t,
    Tezos_error_monad.TzCore.error list)
    result
    Lwt.t

val legacy_restore_contexts : 
  index ->
  filename:string ->
  ((Tezos_crypto.Block_hash.t * Pruned_block_legacy.t) list ->
    (unit, Tezos_error_monad.TzCore.error list) result Lwt.t) ->
  (Tezos_base.Block_header.t option ->
    Tezos_crypto.Block_hash.t ->
    Pruned_block_legacy.t ->
    (unit, Tezos_error_monad.TzCore.error list) result Lwt.t) ->
  (Tezos_base.Block_header.t
   * Block_data_legacy.t
   * Tezos_crypto.Block_metadata_hash.t option
   * Tezos_crypto.Operation_metadata_hash.t list list option
   * Tezos_shell_services.History_mode.Legacy.t
   * Tezos_base.Block_header.t option
   * Tezos_crypto.Block_hash.t list
   * Protocol_data_legacy.t list,
    Tezos_error_monad.TzCore.error list)
    result
    Lwt.t

val retrieve_commit_info : 
  index ->
  Tezos_base.Block_header.t ->
  (Tezos_crypto.Protocol_hash.t
   * string
   * string
   * Tezos_base.Time.Protocol.t
   * Tezos_base.Test_chain_status.t
   * Tezos_crypto.Context_hash.t
   * Tezos_crypto.Block_metadata_hash.t option
   * Tezos_crypto.Operation_metadata_list_list_hash.t option
   * Tezos_crypto.Context_hash.t list,
    Tezos_error_monad.TzCore.error list)
    result
    Lwt.t

val check_protocol_commit_consistency : 
  index ->
  expected_context_hash:Tezos_crypto.Context_hash.t ->
  given_protocol_hash:Tezos_crypto.Protocol_hash.t ->
  author:string ->
  message:string ->
  timestamp:Tezos_base.Time.Protocol.t ->
  test_chain_status:Tezos_base.Test_chain_status.t ->
  predecessor_block_metadata_hash:Tezos_crypto.Block_metadata_hash.t option ->
  predecessor_ops_metadata_hash:
    Tezos_crypto.Operation_metadata_list_list_hash.t option ->
  data_merkle_root:Tezos_crypto.Context_hash.t ->
  parents_contexts:Tezos_crypto.Context_hash.t list ->
  bool Lwt.t