错误如下截图： 解决方法参考：  https://github.com/nodejs/node-gyp/issues/629#issuecomment-153196245  只需要把 npm install 命令 改成 npm install --msvs_version=2015  重新执行即可！

secp256k1 is the elliptic curve used in Bitcoin’s public key cryptography. It is defined by the equation y^2 = x^3 + 7 and is based on the finite field mathematics. The “secp” in secp256k1 stands for