fix: switch chain request chain

package.json

@@ -2,7 +2,7 @@
   "name": "@walletconnect/se-sdk",
   "description": "Single-Ethreum-SDK for WalletConnect Protocol",
   "private": false,
-  "version": "1.8.0",
+  "version": "1.8.1",
   "author": "WalletConnect, Inc. <walletconnect.com>",
   "homepage": "https://github.com/walletconnect/walletconnect-monorepo/",
   "license": "Apache-2.0",

src/controllers/engine.ts

@@ -250,6 +250,14 @@ export class Engine extends ISingleEthereumEngine {
   private onSessionRequest = async (event: SingleEthereumTypes.SessionRequest) => {
     event.params.chainId = parseChain(event.params.chainId);
 
+    if (
+      ["wallet_switchEthereumChain", "wallet_addEthereumChain"].includes(
+        event.params.request.method,
+      )
+    ) {
+      event.params.chainId = this.chainId.toString();
+    }
+
     if (parseInt(event.params.chainId) !== this.chainId || this.isSwitchChainRequest(event)) {
       this.client.logger.info(
         `Session request chainId ${event.params.chainId} does not match current chainId ${this.chainId}. Attempting to switch`,

test/sign.spec.ts

@@ -422,6 +422,66 @@ describe("Sign Integration", () => {
     ]);
     expect(wallet.engine.chainId).to.eq(originalChainId);
   });
+  it("should receive wallet_switchEthereumChain in the wallet's active chainId", async () => {
+    // first pair and approve session
+    await Promise.all([
+      new Promise((resolve) => {
+        wallet.on("session_proposal", async (sessionProposal) => {
+          const { id, params } = sessionProposal;
+          session = await wallet.approveSession({
+            id,
+            chainId: TEST_ETHEREUM_CHAIN_PARSED,
+            accounts: [cryptoWallet.address],
+          });
+          resolve(session);
+        });
+      }),
+      sessionApproval(),
+      wallet.pair({ uri: uriString }),
+    ]);
+    const originalChainId = wallet.engine.chainId;
+    const expectedChainId = 5;
+
+    expect(originalChainId).to.not.eq(expectedChainId);
+
+    // change chainId
+    wallet.engine.chainId = expectedChainId;
+
+    const requestChainId = 0x10;
+
+    await Promise.all([
+      new Promise<void>((resolve) => {
+        wallet.on("session_request", async (sessionRequest) => {
+          const { id, params, topic, verifyContext } = sessionRequest;
+          expect(params.request.method).to.eq("wallet_switchEthereumChain");
+          expect(params.chainId).to.eq(expectedChainId.toString());
+          expect(params.chainId).to.not.eq(requestChainId);
+          await wallet.approveRequest({
+            id,
+            topic: session.topic,
+            result: null,
+          });
+          resolve();
+        });
+      }),
+      new Promise<void>(async (resolve) => {
+        const result = await dapp.request({
+          topic: session.topic,
+          request: {
+            method: "wallet_switchEthereumChain",
+            params: [
+              {
+                chainId: requestChainId,
+              },
+            ],
+          },
+          chainId: TEST_ETHEREUM_CHAIN,
+        });
+        expect(result).to.be.null;
+        resolve();
+      }),
+    ]);
+  });
 
   it("should handle reject to session request in different chain", async () => {
     // first pair and approve session