package octez-libs

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in-package search v0.2.0

A package that contains multiple base libraries used by the Octez suite

Install

Dune Dependency

www.tezos.com Readme Edit opam file Versions (5)

Authors

T

Tezos devteam

Maintainers

C

contact@tezos.com

Sources

tezos-octez-v20.1.tag.bz2

sha256=ddfb5076eeb0b32ac21c1eed44e8fc86a6743ef18ab23fff02d36e365bb73d61

sha512=d22a827df5146e0aa274df48bc2150b098177ff7e5eab52c6109e867eb0a1f0ec63e6bfbb0e3645a6c2112de3877c91a17df32ccbff301891ce4ba630c997a65

doc/octez-libs.kzg/Kzg/Bls/G/argument-2-Srs/index.html

Parameter `G.Srs`

type polynomial = Octez_bls12_381_polynomial.Polynomial.t

type t

val t : t Repr.t

type elt = G.t

val empty : t

val get : t -> int -> elt

get srs i returns the i-th element of srs

val size : t -> int

Returns the pippenger ctxt size, i.e. the number of elements the context is supposed to be called with

val of_bigstring : 
  ?len:int ->
  Bigstringaf.t ->
  (t, [> `End_of_file of string | `Invalid_point of int ]) result

of_bigstring ~len bs reads len points of G in affine compressed format from bs and returns a Srs. If len is omitted the whole bs is read. The bigstring can be loaded from a file with:

let bigstring_of_file filename =
  let fd = Unix.openfile filename [ Unix.O_RDONLY ] 0o440 in
  Bigarray.array1_of_genarray
  @@ Unix.map_file fd Bigarray.char Bigarray.c_layout false
       [| (* [-1] means read the whole file *) -1 |]
in
Srs_g1.of_bigstring
      (bigstring_of_file ("srs_zcash_g1_21"))
      (1 lsl 5)

or with Lwt:

let bigstring_of_file filename =
  let fd = Unix.openfile filename [ Unix.O_RDONLY ] 0o440 in
  Lwt_bytes.map_file ~fd ~shared:false ()
in

val generate_insecure : int -> Bls12_381.Fr.t -> t

val pippenger : ?offset:int -> ?len:int -> t -> polynomial -> elt

pippenger ctxt poly computes the multiscalar exponentiation using the SRS saved in the context and the coefficients of the given polynomial

val to_array : ?len:int -> t -> elt array

val of_array : elt array -> t