crypto: update interface

src/Crypto.ts

@@ -1,14 +1,19 @@
+import { Buffer } from 'buffer';
+
 /**
  * Cross platform interface to implement crypto related functions.
- *
- * TODO: Maybe replace 'any' with generics as Crypto<T> so that
- * nodejs implementations can use Crypto<Buffer> and browser-utils
- * can use Crypto<UInt8Array>.
  */
 export interface Crypto {
-  randomBytes: (length: number) => any;
-  base64: {
-    toBytes: (payload: string | String) => any;
-    toString: (payload: any) => string;
+  randomBytes(length: number): Buffer;
+  sha256(message: string): string;
+  base58: {
+    toBytes(payload: string): Buffer;
+    toString(payload: Buffer): string;
+  };
+  secp256k1: {
+    verify(message: Buffer, signature: Buffer, publicKey: Buffer): boolean;
+    sign(message: Buffer, privateKey: Buffer): Buffer;
+    verifyPrivateKey(privateKey: Buffer): boolean;
+    createPublicKey(privateKey: Buffer): Buffer;
   };
 }

yarn.lock

@@ -2,6 +2,24 @@
 # yarn lockfile v1
 
 
+base64-js@^1.3.1:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.5.1.tgz#1b1b440160a5bf7ad40b650f095963481903930a"
+  integrity sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==
+
+[email protected]:
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-6.0.3.tgz#2ace578459cc8fbe2a70aaa8f52ee63b6a74c6c6"
+  integrity sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==
+  dependencies:
+    base64-js "^1.3.1"
+    ieee754 "^1.2.1"
+
+ieee754@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.2.1.tgz#8eb7a10a63fff25d15a57b001586d177d1b0d352"
+  integrity sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==
+
 [email protected]:
   version "3.1.4"
   resolved "https://registry.yarnpkg.com/jsbi/-/jsbi-3.1.4.tgz#9654dd02207a66a4911b4e4bb74265bc2cbc9dd0"