Change Ed25519 constructor

src/Ed25519Keypair.js

@@ -6,22 +6,12 @@ import sha3 from 'js-sha3';
  * @public
  * @class Keypair Ed25519 keypair in base58 (as BigchainDB expects base58 keys)
  * @type {Object}
- * @param {number} [secret] A seed that will be used as a key derivation function
+ * @param {Buffer} [seed] A seed that will be used as a key derivation function
  * @property {string} publicKey
  * @property {string} privateKey
  */
-export default function Ed25519Keypair(secret) {
-    let keyPair;
-    if (secret) {
-        // Quick and dirty: use key derivation function instead
-        const secretHash = sha3.sha3_256
-            .create()
-            .update(secret)
-            .array();
-        keyPair = nacl.sign.keyPair.fromSeed(new Uint8Array(secretHash))
-    } else {
-        keyPair = nacl.sign.keyPair();
-    }
+export default function Ed25519Keypair(seed) {
+    const keyPair = seed ? nacl.sign.keyPair.fromSeed(seed) : nacl.sign.keyPair();
     this.publicKey = base58.encode(keyPair.publicKey);
     // tweetnacl's generated secret key is the secret key + public key (resulting in a 64-byte buffer)
     this.privateKey = base58.encode(keyPair.secretKey.slice(0, 32));

src/transaction/makeOutput.js

@@ -8,7 +8,7 @@
  */
 export default function makeOutput(condition, amount = 1) {
     return {
-        amount: amount,
+        amount: amount.toString(),
         condition,
         'public_keys': condition.details.hasOwnProperty('public_key') ?
             [condition.details.public_key] : [],