### Issue scope The nem2-library-js [`src/crypto/`](https://github.com/nemtech/nem2-library-js/tree/master/src/crypto) classes must be merged over in the SDK. This merge will need **a new folder** `src/core/crypto` for the crypto classes. ### References : - [src/crypto](https://github.com/nemtech/nem2-library-js/tree/master/src/crypto) - nemtech/nem2-sdk-typescript-javascript#61 : Merge of Library & SDK - nemtech/nem2-sdk-typescript-javascript#92 : use Catbuffer for Schemas and Buffers