Use keccak instead keccakjs

Author: fanatid

index.js

@@ -1,4 +1,4 @@
-const SHA3 = require('keccakjs')
+const createKeccakHash = require('keccak')
 const secp256k1 = require('secp256k1')
 const assert = require('assert')
 const rlp = require('rlp')
@@ -235,11 +235,7 @@ exports.sha3 = function (a, bits) {
   a = exports.toBuffer(a)
   if (!bits) bits = 256
 
-  var h = new SHA3(bits)
-  if (a) {
-    h.update(a)
-  }
-  return Buffer.from(h.digest('hex'), 'hex')
+  return createKeccakHash('keccak' + bits).update(a).digest()
 }
 
 /**

package.json

@@ -100,7 +100,7 @@
   "dependencies": {
     "bn.js": "^4.8.0",
     "create-hash": "^1.1.2",
-    "keccakjs": "^0.2.0",
+    "keccak": "^1.0.2",
     "rlp": "^2.0.0",
     "secp256k1": "^3.0.1"
   },