Handle inviting friends

src/main.rs

@@ -8,6 +8,7 @@ use curve25519_dalek::scalar::Scalar;
 use getopts::Options;
 use lox_library::bridge_table::BridgeLine;
 use lox_library::bridge_table::MAX_BRIDGES_PER_BUCKET;
+use lox_library::scalar_u32;
 use lox_library::IssuerPubKey;
 use serde::Serialize;
 use std::env::args;
@@ -42,6 +43,7 @@ async fn main() {
         "increase server days by NUM_DAYS",
         "NUM_DAYS",
     );
+    opts.optflag("I", "invite", "generate invitation for a friend");
     opts.optflag("L", "level-up", "increase trust level");
     opts.optflag("N", "new-lox-cred", "get a new Lox Credential");
     opts.optopt(
@@ -171,4 +173,34 @@ async fn main() {
     } else {
         lox_cred
     };
+
+    // Invite a friend
+    let lox_cred = if matches.opt_present("I") {
+        if scalar_u32(&lox_cred.invites_remaining).unwrap() > 0 {
+            let (cred, invite) = issue_invite(
+                &net,
+                &lox_cred,
+                &get_reachability_credential(&net).await,
+                get_lox_pub(&lox_auth_pubkeys),
+                get_reachability_pub(&lox_auth_pubkeys),
+                get_invitation_pub(&lox_auth_pubkeys),
+            )
+            .await;
+            // TODO: Make this unique per-run (e.g., add timestamp)
+            let invite_filename = "invite.json";
+            save_object(&invite, &invite_filename);
+            save_object(&cred, &lox_cred_filename);
+            println!("Invite saved in {}", &invite_filename);
+            println!(
+                "Invites left: {}",
+                scalar_u32(&cred.invites_remaining).unwrap()
+            );
+            cred
+        } else {
+            println!("No invites left");
+            lox_cred
+        }
+    } else {
+        lox_cred
+    };
 }