schnorr library
Package schnorr implements the Schnorr signature, which is a digital signature produced by the Schnorr signature algorithm that was described by Claus Schnorr
The code is based upon the initial proposal of Pieter Wuille when it didn't have a BIP number assigned yet.
Support all curves in elliptic package
Classes
Functions

aggregateSign(
List< PrivateKey> privateKeys, List<int> message) → Signature 
batchVerify(
List< PublicKey> publicKeys, List<List< messages, List<int> >Signature> signatures) → bool 
combinePublicKeys(
List< PublicKey> pubs) → PublicKey 
deterministicSign(
PrivateKey priv, List< int> hash) → Signature  deterministicSign signs a hash (which should be the result of hashing a larger message) using the private key, priv. If the hash is longer than the bitlength of the private key's curve order, the hash will be truncated to that length. It returns the signature as a pair of integers.

verify(
PublicKey pub, List< int> hash, Signature sig) → bool  verify a signature of a 32 byte message against the public key. Returns an error if verification fails. https://github.com/sipa/bips/blob/bipschnorr/bipschnorr.mediawiki#verification