diff --git a/fix_101.py b/fix_101.py
new file mode 100644
index 0000000..4562066
--- /dev/null
+++ b/fix_101.py
@@ -0,0 +1,71 @@
+# contracts/privacy_pool/src/lib.rs
+
+use std::collections::HashMap;
+
+#[derive(Debug)]
+struct MainnetLaunchChecklist {
+    security: Vec<String>,
+    audit: Vec<String>,
+    testing: Vec<String>,
+    deployment: Vec<String>,
+    rollback: Vec<String>,
+    communication: Vec<String>,
+}
+
+impl MainnetLaunchChecklist {
+    fn new() -> Self {
+        MainnetLaunchChecklist {
+            security: vec![
+                "Conduct a security audit of the contract code.".to_string(),
+                "Ensure all sensitive operations are gas-optimized.".to_string(),
+                "Implement proper access control mechanisms.".to_string(),
+            ],
+            audit: vec![
+                "Obtain an external security audit from a reputable firm.".to_string(),
+                "Review audit findings and address all critical issues.".to_string(),
+            ],
+            testing: vec![
+                "Run unit tests for all contract functions.".to_string(),
+                "Perform integration tests to ensure all components work together.".to_string(),
+                "Conduct stress tests to evaluate system performance under load.".to_string(),
+            ],
+            deployment: vec![
+                "Prepare a deployment script for the mainnet.".to_string(),
+                "Test the deployment script in a staging environment.".to_string(),
+                "Ensure all deployment configurations are correct.".to_string(),
+            ],
+            rollback: vec![
+                "Develop a rollback plan in case of deployment failure.".to_string(),
+                "Test the rollback plan in a controlled environment.".to_string(),
+                "Document the rollback process for future reference.".to_string(),
+            ],
+            communication: vec![
+                "Create a communication strategy for stakeholders.".to_string(),
+                "Establish a timeline for the mainnet launch.".to_string(),
+                "Coordinate with the marketing team for launch announcements.".to_string(),
+            ],
+        }
+    }
+
+    fn print_checklist(&self) {
+        println!("Mainnet Launch Checklist:");
+        self.print_section("Security", &self.security);
+        self.print_section("Audit", &self.audit);
+        self.print_section("Testing", &self.testing);
+        self.print_section("Deployment", &self.deployment);
+        self.print_section("Rollback", &self.rollback);
+        self.print_section("Communication", &self.communication);
+    }
+
+    fn print_section(&self, title: &str, items: &[String]) {
+        println!("\n{}", title);
+        for (index, item) in items.iter().enumerate() {
+            println!("{}. {}", index + 1, item);
+        }
+    }
+}
+
+fn main() {
+    let checklist = MainnetLaunchChecklist::new();
+    checklist.print_checklist();
+}
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