update truffle config for polygon

sol/truffle-config.js

@@ -17,12 +17,9 @@
  * phrase from a file you've .gitignored so it doesn't accidentally become public.
  *
  */
-
-// const HDWalletProvider = require('@truffle/hdwallet-provider');
-// const infuraKey = "fj4jll3k.....";
-//
-// const fs = require('fs');
-// const mnemonic = fs.readFileSync(".secret").toString().trim();
+const fs = require('fs');
+const HDWalletProvider = require('@truffle/hdwallet-provider');
+const secret = JSON.parse(fs.readFileSync("polygon-secret.json").toString().trim());
 
 module.exports = {
   /**
@@ -72,6 +69,20 @@ module.exports = {
     // network_id: 2111,   // This network is yours, in the cloud.
     // production: true    // Treats this network as if it was a public net. (default: false)
     // }
+    polygon: {
+        provider: () => new HDWalletProvider(secret.privateKey, "https://polygon-rpc.com"),
+        network_id: 137,
+        confirmations: 3,
+        timeoutBlocks: 200,
+        skipDryRun: true
+    },
+    mumbai: {
+        provider: () => new HDWalletProvider(secret.privateKey, "https://matic-mumbai.chainstacklabs.com"),
+        network_id: 80001,
+        confirmations: 3,
+        timeoutBlocks: 200,
+        skipDryRun: true
+    },
   },
 
   // Set default mocha options here, use special reporters etc.
@@ -82,7 +93,7 @@ module.exports = {
   // Configure your compilers
   compilers: {
     solc: {
-      version: "0.6.2",    // Fetch exact version from solc-bin (default: truffle's version)
+      version: "0.6.6",    // Fetch exact version from solc-bin (default: truffle's version)
       // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
       // settings: {          // See the solidity docs for advice about optimization and evmVersion
       //  optimizer: {
@@ -92,5 +103,11 @@ module.exports = {
       //  evmVersion: "byzantium"
       // }
     }
+  },
+  plugins: [
+    'truffle-plugin-verify'
+  ],
+  api_keys: {
+    etherscan: secret.etherScanApiKey
   }
 };