Merge branch 'master' of github.com:oraclize/ethereum-examples

Author: Riccardo Persiani

.gitignore

@@ -0,0 +1,3 @@
+**/node_modules
+*.sw*
+*.log

solidity/KrakenPriceTicker.sol

@@ -17,7 +17,7 @@ contract KrakenPriceTicker is usingOraclize {
     event NewKrakenPriceTicker(string price);
 
     function KrakenPriceTicker() public {
-        oraclize_setProof(proofType_TLSNotary | proofStorage_IPFS);
+        oraclize_setProof(proofType_Android | proofStorage_IPFS);
         update();
     }
 

solidity/Swarm.sol

@@ -6,14 +6,14 @@
 pragma solidity ^0.4.0;
 import "github.com/oraclize/ethereum-api/oraclizeAPI.sol";
 
-contract swarmExample is usingOraclize {
+contract Swarm is usingOraclize {
 
     string public swarmContent;
 
     event newOraclizeQuery(string description);
     event newSwarmContent(string swarmContent);
 
-    function swarmExample() {
+    function Swarm() {
         update();
     }
 

solidity/YoutubeViews.sol

@@ -5,12 +5,6 @@
     for a given Youtube video.
 */
 
-
-pragma solidity ^0.4.0;
-
-import "github.com/oraclize/ethereum-api/oraclizeAPI.sol";
-
-
 pragma solidity ^0.4.0;
 
 import "github.com/oraclize/ethereum-api/oraclizeAPI.sol";
@@ -38,4 +32,4 @@ contract YoutubeViews is usingOraclize {
         NewOraclizeQuery("Oraclize query was sent, standing by for the answer..");
         oraclize_query("URL", 'html(https://www.youtube.com/watch?v=9bZkp7q19f0).xpath(//*[contains(@class, "watch-view-count")]/text())');
     }
-}
+}

solidity/computation-datasource/bitcoin/getBitcoinAddressBalance.sol renamed to solidity/computation-datasource/bitcoin/BitcoinAddressExample.sol

@@ -9,7 +9,7 @@ import "github.com/oraclize/ethereum-api/oraclizeAPI.sol";
 contract BitcoinAddressExample is usingOraclize {
 
     // Address balance in Satoshis
-    uint256 balance;
+    uint256 public balance;
 
     event BitcoinAddressBalance(uint _balance);
 

solidity/computation-datasource/delegatedMath/delegatedMath.sol renamed to solidity/computation-datasource/delegatedMath/DelegatedMath.sol

@@ -7,11 +7,11 @@ pragma solidity ^0.4.0;
 import "github.com/oraclize/ethereum-api/oraclizeAPI.sol";
 
 
-contract DelegatedMathExample is usingOraclize {
+contract DelegatedMath is usingOraclize {
 
     event operationResult(uint _result);
 
-    function DelegatedMathExample() {
+    function DelegatedMath() {
         oraclize_setProof(proofType_TLSNotary | proofStorage_IPFS); 
         delegateOperation("32", "125");
     }

solidity/computation-datasource/url-requests/urlRequests.sol renamed to solidity/computation-datasource/url-requests/UrlRequests.sol

@@ -10,12 +10,12 @@ pragma solidity ^0.4.0;
 
 import "github.com/oraclize/ethereum-api/oraclizeAPI.sol";
 
-contract UrlRequestsComputation is usingOraclize {
+contract UrlRequests is usingOraclize {
 
     event newOraclizeQuery(string description);
     event emitResult(string result);
 
-    function UrlRequestsComputation() payable {
+    function UrlRequests() payable {
         oraclize_setProof(proofType_TLSNotary | proofStorage_IPFS);
     }
 

solidity/gas-price-oracle/README.md

@@ -0,0 +1,67 @@
+# __A Gas Price Oracle leveraging Oraclize__
+ 
+
+## :computer: __What this is:__
+
+Designed for the ethereum community, this is an Oraclize-powered and Oraclize-funded ethereum gas-price oracle for providing ate on-chain gas prices. The smart-contract allows anyone to query the EthGasStation.info for up-to-date gas prices at any time - other smart-contracts can make queries too! In addition, an ongoing recursive query funded by Oraclize will ensure the latest gas prices are updated in the contract every six hours - enjoy!
+
+
+ 
+
+---
+
+ 
+
+### :fuelpump: __Gas Prices__: 
+
+**❍** Requires ~ 3,600,000 gas for deployment.
+
+**❍** Gas for normal query to gas station is ~ 111,000.
+
+**❍** Gas for restarting the recursive chain is ~~170,000~~ 111,000 too now.
+
+**❍** _Recursive_ callbacks cost ~170409 so limit is 171000.
+
+**❍** _Non recursive_ callbacks cost ~ 85,350 so their limit is set at 87,000.
+
+**❍** Recursive restarting queries also refund excess ETH, meaning if the recursions stopped due to insufficient ETH balance, it should be topped up first.
+
+ 
+
+***
+
+ 
+
+
+
+### :mortar_board: __Instructions to test:__
+
+![The passing tests!!](gas-price-oracle-tests.jpg)
+
+**Pre-flight.** Make sure you have Truffle 5 installed globally: 
+
+**`❍ npm install -g truffle@beta`**
+
+**1.** Clone the ethereum-examples repo:
+
+**`❍ git clone https://github.com/oraclize/ethereum-examples.git`**
+
+**2.** Switch into the gas-price-oracle directory:
+
+**`❍ cd ethereum-examples/solidity/gas-price-oracle`**
+
+**3.** Install dependencies:
+
+**`❍ npm install`**
+
+**4.** Start Truffle via:
+
+**`❍ truffle develop`**
+
+**5.** Start the Ethereum bridge in a new console via:
+
+**`❍ npm run bridge`**
+
+**6.** Once bridge is spooled up, back to first console to run the tests via:
+
+**`❍ truffle_develop> test`**