SSE Session and examples

sandbox/sandbox-price-oracle.ts

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+import { SSESession, type SSEvent } from '../source/sse-session/index.ts';
+
+// Command: npx tsx ./sandbox/sandbox-price-oracle.ts
+
+// Use the GP Price Oracle API
+const url = 'https://oracles.generalprotocols.com/sse/v1/messages';
+
+// Create our sse session
+const sseSession = await SSESession.create(url);
+
+// Create a message event handler
+sseSession.on('message', (message: SSEvent) => {
+    console.log(message);
+});
+
+// Connect to the SSESession
+await sseSession.connect();