From 1eda11127c7a34ad0cc2495c0f4c7808e572f057 Mon Sep 17 00:00:00 2001
From: Shubhorup Biswas <shubhorup.biswas@dunyalabs.io>
Date: Wed, 29 Aug 2018 16:50:58 +0530
Subject: [PATCH] ETH-USD price

---
 ETHPriceTracker.sol | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 ETHPriceTracker.sol

diff --git a/ETHPriceTracker.sol b/ETHPriceTracker.sol
new file mode 100644
index 0000000..934519b
--- /dev/null
+++ b/ETHPriceTracker.sol
@@ -0,0 +1,40 @@
+pragma solidity ^0.4.19;
+/*
+  Import the Oraclize contract
+  outside of Remix, direct imports from GitHub may not be supported
+  instead, use a local import or just paste the Oraclize code in directly
+*/
+import "./Oraclize.sol";
+
+contract Template is usingOraclize {
+    
+    // Define variables
+    uint public ETHPrice; // number obtained from coinmarketcap
+
+    // Events used to track contract actions
+    event LogOraclizeQuery(string description);
+    event LogResultReceived(string number);
+
+    // Query Oraclize to get random number
+    function getEthPrice() public payable {
+        // require ETH to cover callback gas costs
+        require(msg.value >= 0.004 ether); // 200,000 gas * 20 Gwei = 0.004 ETH
+      
+        oraclize_query("URL", "json(https://api.coinmarketcap.com/v2/ticker/1027).data.quotes.USD.price");        
+                       
+        // log that query was sent
+        LogOraclizeQuery("Oraclize query was sent, standing by for the answer..");
+    }
+    
+    // Callback function for Oraclize once it retreives the data 
+    function __callback(bytes32 myid, string result) public {
+        // only allow Oraclize to call this function
+        require(msg.sender == oraclize_cbAddress());
+
+        ETHPrice = parseInt(result); 
+      
+        // log the new number that was obtained
+        LogResultReceived(result); 
+    }
+    
+}