Use bn.js without types

Author: remagpie

package.json

@@ -35,7 +35,6 @@
  },
  "homepage": "https://github.com/CodeChain-io/codechain-primitives-js#readme",
  "devDependencies": {
- "@types/bn.js": "^4.11.2",
  "@types/crypto-js": "^3.1.43",
  "@types/jest": "^23.3.2",
  "@types/lodash": "^4.14.116",

src/key/schnorr.ts

@@ -1,6 +1,9 @@
-import BN = require("bn.js");
 import { md } from "node-forge";
 
+/**
+ * @hidden
+ */
+const BN = require("bn.js");
 /**
  * @hidden
  */
@@ -22,10 +25,7 @@ export interface SchnorrSignature {
  s: string;
 }
 
-/**
- * @hidden
- */
-export function schnorrHash(r: BN, msg: BN): string {
+function schnorrHash(r: any, msg: any): string {
  // codechain-sdk is now importing a library from bitcore.
  // But the library monkey patches bn.js so that the method parametrization changes when imported.
  // toBuffer("be", 32) does not guarantee the buffer length to be 32 if overridden.