Use NAPI-based keccak instead of js-sha3

Author: alcuadrado

packages/ethereum-cryptography/package.json

@@ -49,7 +49,6 @@
     "pure/**/*.d.ts.map"
   ],
   "browser": {
-    "./keccak.js": "./pure/keccak.js",
     "./scrypt.js": "./pure/scrypt.js",
     "./ripemd160.js": "./pure/ripemd160.js",
     "./secp256k1.js": "./pure/secp256k1.js",
@@ -128,7 +127,7 @@
     "create-hmac": "^1.1.7",
     "elliptic": "^6.4.1",
     "hash.js": "^1.1.7",
-    "js-sha3": "^0.8.0",
+    "keccak": "^3.0.0",
     "pbkdf2": "^3.0.17",
     "randombytes": "^2.1.0",
     "safe-buffer": "^5.1.2",

packages/ethereum-cryptography/src/keccak.ts

@@ -1,15 +1,19 @@
-import * as keccakPure from "./pure/keccak";
+import { createHashFunction } from "./hash-utils";
 
-let keccakModule: typeof keccakPure;
+const createKeccakHash = require("keccak");
 
-try {
-  // tslint:disable-next-line no-implicit-dependencies
-  keccakModule = require("ethereum-cryptography-native/keccak");
-} catch {
-  keccakModule = require("./pure/keccak");
-}
+export const keccak224 = createHashFunction(() =>
+  createKeccakHash("keccak224")
+);
 
-export const keccak224 = keccakModule.keccak224;
-export const keccak256 = keccakModule.keccak256;
-export const keccak384 = keccakModule.keccak384;
-export const keccak512 = keccakModule.keccak512;
+export const keccak256 = createHashFunction(() =>
+  createKeccakHash("keccak256")
+);
+
+export const keccak384 = createHashFunction(() =>
+  createKeccakHash("keccak384")
+);
+
+export const keccak512 = createHashFunction(() =>
+  createKeccakHash("keccak512")
+);