From 94e4da8e4c9839570a5cf49bb00a19fa33bb0938 Mon Sep 17 00:00:00 2001
From: monomadic <monomadic.crypto>
Date: Fri, 8 Jul 2022 18:51:19 +0700
Subject: [PATCH 1/2] Add the wallet_switchEthereumChain method to the eip1193
 transport

---
 src/transports/eip_1193.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/transports/eip_1193.rs b/src/transports/eip_1193.rs
index 55b18abc..305cea97 100644
--- a/src/transports/eip_1193.rs
+++ b/src/transports/eip_1193.rs
@@ -132,6 +132,24 @@ impl Eip1193 {
             .into_deserializer();
         O::deserialize(deserializer).expect(&format!("couldn't deserialize {}", name))
     }
+
+    /// EIP-3326: Switch a wallet to another chain
+    pub async fn switch_chain(&self, chain_id: &str) -> Result<serde_json::value::Value, error::Error> {
+        let js_params = JsValue::from_serde(&vec![&ChainId { chain_id: chain_id.to_string() }])
+            .expect("couldn't send method params via JSON");
+
+        self.provider_and_listeners.borrow().provider.request_wrapped(RequestArguments {
+            method: String::from("wallet_switchEthereumChain"),
+            params: js_sys::Array::from(&js_params),
+        })
+        .await
+    }
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ChainId {
+    pub chain_id: String,
 }
 
 /// Event data sent from the JavaScript side to our callback.

From 9f3069e4f1fc89c53f5f890fc11737c641325449 Mon Sep 17 00:00:00 2001
From: monomadic <monomadic.crypto>
Date: Fri, 8 Jul 2022 22:31:58 +0700
Subject: [PATCH 2/2] rustfmt

---
 src/transports/eip_1193.rs | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/src/transports/eip_1193.rs b/src/transports/eip_1193.rs
index 305cea97..7775f00e 100644
--- a/src/transports/eip_1193.rs
+++ b/src/transports/eip_1193.rs
@@ -135,14 +135,19 @@ impl Eip1193 {
 
     /// EIP-3326: Switch a wallet to another chain
     pub async fn switch_chain(&self, chain_id: &str) -> Result<serde_json::value::Value, error::Error> {
-        let js_params = JsValue::from_serde(&vec![&ChainId { chain_id: chain_id.to_string() }])
-            .expect("couldn't send method params via JSON");
-
-        self.provider_and_listeners.borrow().provider.request_wrapped(RequestArguments {
-            method: String::from("wallet_switchEthereumChain"),
-            params: js_sys::Array::from(&js_params),
-        })
-        .await
+        let js_params = JsValue::from_serde(&vec![&ChainId {
+            chain_id: chain_id.to_string(),
+        }])
+        .expect("couldn't send method params via JSON");
+
+        self.provider_and_listeners
+            .borrow()
+            .provider
+            .request_wrapped(RequestArguments {
+                method: String::from("wallet_switchEthereumChain"),
+                params: js_sys::Array::from(&js_params),
+            })
+            .await
     }
 }