GITBOOK-24: change request with no subject merged in GitBook

Author: klayoracleinc

SUMMARY.md

@@ -10,6 +10,15 @@
 * [Node & data provider communication](fundamentals/node-and-data-provider-communication.md)
 * [Installing KlayOracle](fundamentals/installing-klayoracle.md)
 
+## Smart Contract Developers
+
+* [Price Feeds](smart-contract-developers/price-feeds/README.md)
+  * [Quick Start: Code Samples](smart-contract-developers/price-feeds/quick-start-code-samples.md)
+  * [How to Use KlayOracle Price Feeds](smart-contract-developers/price-feeds/how-to-use-klayoracle-price-feeds.md)
+* [Random Number Generator](smart-contract-developers/random-number-generator/README.md)
+  * [Quick Start: Code Samples](smart-contract-developers/random-number-generator/quick-start-code-samples.md)
+  * [How to Use KlayOracle Random Number Generator](smart-contract-developers/random-number-generator/how-to-use-klayoracle-random-number-generator.md)
+
 ## Data Providers
 
 * [Introduction](data-providers/introduction.md)

smart-contract-developers/price-feeds/README.md

@@ -0,0 +1,2 @@
+# Price Feeds
+

smart-contract-developers/price-feeds/how-to-use-klayoracle-price-feeds.md

@@ -0,0 +1,2 @@
+# How to Use KlayOracle Price Feeds
+

smart-contract-developers/price-feeds/quick-start-code-samples.md

@@ -0,0 +1,78 @@
+# Quick Start: Code Samples
+
+## Retrieving the KLAY/USD pair price
+
+### Solidity Example
+
+```solidity
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.16;
+
+import "./KlayOracleInterface.sol";
+
+contract OracleConsumerSample {
+    address public immutable oracleAddress;
+
+    uint256 public klayOutput;
+
+    constructor(address _oracleAddress) {
+        require(_oracleAddress != address(0));
+        oracleAddress = _oracleAddress;
+    }
+
+    function swapEthtoKlay() public returns (bool) {
+        KlayOracleInterface oracle = KlayOracleInterface(oracleAddress);
+
+        bool replied = oracle.newOracleRequest(
+            this.swap.selector,
+            address(this)
+        );
+
+        return replied;
+    }
+
+    function swap(uint256 _klayOutput) public {
+        klayOutput = _klayOutput;
+        //Swap eth to klay
+    }
+}
+```
+
+### JavaScript example
+
+```javascript
+const oracleAddress = "0xbc884088e406422a3ef39aedd1c546de7ac4be7c";
+
+const abi = [
+  {
+      "inputs": [],
+      "name": "latestRound",
+      "outputs": [
+        {
+          "internalType": "bytes32",
+          "name": "answer",
+          "type": "bytes32"
+        },
+        {
+          "internalType": "uint256",
+          "name": "roundTime",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "timestamp",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    }
+]
+
+const provider = new ethers.providers.JsonRpcProvider("https://api.baobab.klaytn.net:8651");
+
+const oracleContract = new ethers.Contract(oracleAddress, abi, provider);
+
+const [answer, roundTime, timestamp] = await oracleContract.latestRound()
+```

smart-contract-developers/random-number-generator/README.md

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+# Random Number Generator
+

smart-contract-developers/random-number-generator/how-to-use-klayoracle-random-number-generator.md

@@ -0,0 +1,2 @@
+# How to Use KlayOracle Random Number Generator
+

smart-contract-developers/random-number-generator/quick-start-code-samples.md

@@ -0,0 +1,2 @@
+# Quick Start: Code Samples
+