libff.js - Wrapper around libff

This package is currently extremely minimal, with very limited coverage of the libff library.

Dependencies

1. The install will attempt to build the libff library. Hence, make sure that you have installed the following tools before proceeding:

• CMake (>= 2.8)
• Recent gcc or clang C++ compilers
• git
• node (<= 10.23)
• npm (>= 6.9)

See the libff repository for further details.

2. Install the submodules:

git submodule update --init --recursive

Run the tests

npm install
npm run test

Example

import libff = require('libff.js');

// Addition of elliptic curve points on the BW6-761 curve
var bw6_761 = libff.bw6_761;

const a_g1 = Buffer.from(
    "00bdd3187c4a57477dd0830d8bb83a85593798ea1a55668c8ecba3db496e132a1dd339c5fcb2cefd718d5a50f4083d3b410e83135fec7197210145ae4ddce934ec0888cb1a408ae8288edb780c1e18371da1be3a02b2f487bfa7095e760be81a009413f554540d560317eec4f050678f69354e9e935feee8baadbf7a2ec004039163ac1bf31a15f64a820dc5ae9b84c818b321d8db0883bf4861a68212b8aa03ab23a88b0115e974e18db5c0970deb0e7130dba6f54da5179dc19db66d2fdf2a",
    'hex');

const b_g1 = Buffer.from(
    "009b512f473767b3e84f621c1efb9a875b0ae1d623dd0ac1fd29354688311902fcad849275945122751e5b564e8ffd4939174982282da32feb69c2fa8d9c32d92f8e3825f390bf75fc4a8554b2c1367f1a4d92ff40539b4bfc2cba0298b46a820081b87ff3a0887d2f892a8612e47d89b11140beaccdfc5f269fe046da6355ea4a954be341b294ff4ea27bc8926192867adde574fc5ee4310bc502c42f297601f172a930d1e62b8a05ce451ede1a5d4ea67f8ecd1c49ad47388257f60a7dc91a",
    'hex');

const a_plus_b_g1 = Buffer.alloc(bw6_761.g1_bytes);
if (!bw6_761.ecadd(a_g1, b_g1, a_plus_b_g1)) {
    throw "Error in curve point addition";
}
console.log("a_g1 + b_g1 = " + a_plus_b_g1.toString('hex'));