fix: support http endpoints (#433)

web3.js/examples/get-balance.js

@@ -9,7 +9,7 @@ const solanaWeb3 = require('..');
 const account = new solanaWeb3.Account();
 
 let url;
-url = 'https://testnet.solana.com:8443';
+url = 'http://testnet.solana.com:8899';
 //url = 'http://localhost:8899';
 const connection = new solanaWeb3.Connection(url);
 

web3.js/src/util/testnet.js

@@ -6,22 +6,35 @@ import {testnetDefaultChannel} from '../../package.json';
  * @private
  */
 const endpoint = {
+  http: {
+    edge: 'http://edge.testnet.solana.com:8899',
+    beta: 'http://beta.testnet.solana.com:8899',
+    stable: 'http://testnet.solana.com:8899',
+  },
+  https: {
     edge: 'https://edge.testnet.solana.com:8443',
     beta: 'https://beta.testnet.solana.com:8443',
     stable: 'https://testnet.solana.com:8443',
+  },
 };
 
 /**
  * Retrieves the RPC endpoint URL for the specified testnet release
  * channel
  */
-export function testnetChannelEndpoint(channel?: string): string {
+export function testnetChannelEndpoint(
+  channel?: string,
+  tls?: boolean,
+): string {
+  const key = tls === false ? 'http' : 'https';
+
   if (!channel) {
-    return endpoint[testnetDefaultChannel];
+    return endpoint[key][testnetDefaultChannel];
   }
 
-  if (endpoint[channel]) {
-    return endpoint[channel];
+  const url = endpoint[key][channel];
+  if (!url) {
+    throw new Error(`Unknown ${key} channel: ${channel}`);
   }
-  throw new Error(`Unknown channel: ${channel}`);
+  return url;
 }

web3.js/test/testnet.test.js

@@ -11,6 +11,14 @@ test('edge', () => {
   expect(testnetChannelEndpoint('edge')).toEqual(
     'https://edge.testnet.solana.com:8443',
   );
+
+  expect(testnetChannelEndpoint('edge', true)).toEqual(
+    'https://edge.testnet.solana.com:8443',
+  );
+
+  expect(testnetChannelEndpoint('edge', false)).toEqual(
+    'http://edge.testnet.solana.com:8899',
+  );
 });
 
 test('default', () => {