blindsecp256k1-js 
Typescript implementation compatible with https://github.com/arnaucube/go-blindsecp256k1
Blind signature over secp256k1, based on "New Blind Signature Schemes Based on the (Elliptic Curve) Discrete Logarithm Problem" paper by Hamid Mala & Nafiseh Nezhadansari.
WARNING: this repo is experimental, do not use in production.