import { ec } from 'elliptic';

const EC = new ec('secp256k1');

export const generateXY = pub => {
  const stripped = pub.slice(2);
  const key = EC.keyFromPublic(stripped, 'hex');
  const pubPoint = key.getPublic();
  const x = '0x' + pubPoint.getX().toString(16);
  const y = '0x'+ pubPoint.getY().toString(16);
  return { x, y };
}

export const keyFromXY = (X, Y) => {
  const x = Buffer.from(X.substring(2), 'hex');
  const y = Buffer.from(Y.substring(2), 'hex');
  const keys = EC.keyFromPublic({ x, y }, 'hex');
  return `0x${keys.getPublic().encode('hex')}`;
}