fix gas price

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tx-manager",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "description": "",
   "main": "index.js",
   "scripts": {

src/Transaction.js

@@ -341,7 +341,7 @@ class Transaction {
     const gasPrices = await this._gasPriceOracle.gasPrices()
     const result = gasPrices[type].toString()
     console.log(`${type} gas price is now ${result} gwei`)
-    return parseUnits(gasPrices[type], 'gwei').toHexString()
+    return parseUnits(result, 'gwei').toHexString()
   }
 
   /**