Activate flow

web3.js/src/account.js

@@ -1,7 +1,11 @@
+// @flow
 import nacl from 'tweetnacl';
 import bs58 from 'bs58';
+import type {KeyPair} from 'tweetnacl';
 
 export class Account {
+  _keypair: KeyPair;
+
   constructor(secretKey: ?Buffer = null) {
     if (secretKey) {
       this._keypair = nacl.sign.keyPair.fromSecretKey(secretKey);
@@ -14,7 +18,7 @@ export class Account {
     return bs58.encode(this._keypair.publicKey);
   }
 
-  get secretKey(): string {
+  get secretKey(): Buffer {
     return this._keypair.secretKey;
   }
 }