Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

rangeproof: add a "net blinding factor" API for Elements #204

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

rangeproof: add a "net blinding factor" API for Elements #204

wants to merge 1 commit into from

Commits on Sep 11, 2022

  1. rangeproof: add a "net blinding factor" API for Elements 

    Our original API for Confidential Assets transaction balancing was the
single function `secp256k1_pedersen_blind_generator_blind_sum` which
attempts to take a complete list of vbfs and abfs and modifies a single
abf at the end. However this API has a number of shortcomings:

   * it is really confusing
   * it assumes that the user has all the abfs and vbfs in convenient
     arrays, requiring marshalling on the C++ side
   * it does not support partial computations, as are needed by PSET
   * there is no easy/sensible way to extend this API to allow more
     interesting of transaction balancing (e.g. by blinding only an
     asset, leaving the value explicit)

The hope is that by exposing the arithmetic at a more fine-grained
level, these issues will be fixed. These methods can be abused to do
arithmetic on arbitrary scalars, but this is already possible (in an
ugly manner) by using secp256k1_seckey_tweak_add and explicit 0-checks.
    @apoelstra
    apoelstra committed Sep 11, 2022
    Configuration menu
    Copy the full SHA
    ac0958f View commit details
    Browse the repository at this point in the history