ibc: For start/stop relayer, use whichever chain is available.

Instead of assumming Neutron exists.

examples/neutron_osmosis.rs

@@ -1,5 +1,5 @@
 use localic_utils::{ConfigChainBuilder, TestContextBuilder};
-use std::error::Error;
+use std::{error::Error, thread, time::Duration};
 
 const ACC_0_ADDR: &str = "osmo1hj5fveer5cjtn4wd6wstzugjfdxzl0xpwhpz63";
 const NEUTRON_ACC_0_ADDR: &str = "neutron1hj5fveer5cjtn4wd6wstzugjfdxzl0xpznmsky";
@@ -22,6 +22,9 @@ fn main() -> Result<(), Box<dyn Error>> {
     ctx.stop_relayer();
     ctx.start_relayer();
 
+    // Wait for the relayer to start up
+    thread::sleep(Duration::from_secs(10));
+
     ctx.build_tx_create_tokenfactory_token()
         .with_chain_name("neutron")
         .with_subdenom("bruhtoken")

src/utils/setup/ibc.rs

@@ -138,20 +138,28 @@ impl TestContext {
     }
 
     pub fn start_relayer(&mut self) {
-        let neutron = self.get_chain(NEUTRON_CHAIN_NAME);
+        // Any random chain will allow us to kill the relayer,
+        // so select any chain we can get the API URL from
+        let chain = self.chains.values().next().unwrap();
 
+        // See above. chain_id does not matter, since there is
+        // one relayer running
         reqwest::blocking::Client::default()
-            .post(&neutron.rb.api)
+            .post(&chain.rb.api)
             .json(&serde_json::json!({ "chain_id": NEUTRON_CHAIN_ID, "action": "start-relayer"}))
             .send()
             .unwrap();
     }
 
     pub fn stop_relayer(&mut self) {
-        let neutron = self.get_chain(NEUTRON_CHAIN_NAME);
+        // Any random chain will allow us to kill the relayer,
+        // so select any chain we can get the API URL from
+        let chain = self.chains.values().next().unwrap();
 
+        // See above. chain_id does not matter, since there is
+        // one relayer running
         reqwest::blocking::Client::default()
-            .post(&neutron.rb.api)
+            .post(&chain.rb.api)
             .json(&serde_json::json!({ "chain_id": NEUTRON_CHAIN_ID, "action": "stop-relayer"}))
             .send()
             .unwrap();