feat: add session event parsing

reown-com · Dec 13, 2024 · d336417 · d336417
1 parent 9d2dd25
commit d336417
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diff --git a/packages/appkit/src/client.ts b/packages/appkit/src/client.ts
@@ -81,6 +81,7 @@ import UniversalProvider from '@walletconnect/universal-provider'
 import type { SessionTypes } from '@walletconnect/types'
 import type { UniversalProviderOpts } from '@walletconnect/universal-provider'
 import { W3mFrameProviderSingleton } from './auth-provider/W3MFrameProviderSingleton.js'
+import { WcHelpersUtil } from './utils/HelpersUtil.js'
 
 declare global {
   interface Window {
@@ -1294,6 +1295,20 @@ export class AppKit {
           this.setCaipNetwork(caipNetwork)
         }
       })
+
+      this.universalProvider.on('session_event', (callbackData: unknown) => {
+        if (WcHelpersUtil.isSessionEventData(callbackData)) {
+          const { name, data } = callbackData.params.event
+
+          if (name === 'accountsChanged' && Array.isArray(data)) {
+            const caipAddress = CoreHelperUtil.parseCaipAddress(data[0])
+
+            if (caipAddress) {
+              this.syncAccount(caipAddress)
+            }
+          }
+        }
+      })
     }
   }
 

diff --git a/packages/appkit/src/tests/utils/HelpersUtil.test.ts b/packages/appkit/src/tests/utils/HelpersUtil.test.ts
@@ -205,4 +205,27 @@ describe('WcHelpersUtil', () => {
       ])
     })
   })
+
+  describe('isSessionEventData', () => {
+    test.each([
+      [undefined, false],
+      [{}, false],
+      [
+        {
+          id: 1734112958243866,
+          topic: 'b2cb2748499532d9c307846c444b364dd881c959d9a080e30d63b6a76270a0f8',
+          params: {
+            event: {
+              name: 'accountsChanged',
+              data: ['eip155:1:0x53F31e8972Ebddac1553E37887C25C1b748485A6']
+            },
+            chainId: 'eip155:1'
+          }
+        },
+        true
+      ]
+    ])('should validate session event data', (data, expected) => {
+      expect(WcHelpersUtil.isSessionEventData(data)).toBe(expected)
+    })
+  })
 })
diff --git a/packages/appkit/src/utils/HelpersUtil.ts b/packages/appkit/src/utils/HelpersUtil.ts
@@ -101,5 +101,29 @@ export const WcHelpersUtil = {
 
       return Array.from(new Set([...chains, ...accountsChains]))
     })
+  },
+
+  isSessionEventData(data: unknown): data is WcHelpersUtil.SessionEventData {
+    return (
+      typeof data === 'object' &&
+      data !== null &&
+      'id' in data &&
+      'topic' in data &&
+      'params' in data &&
+      typeof data.params === 'object' &&
+      data.params !== null &&
+      'chainId' in data.params &&
+      'event' in data.params &&
+      typeof data.params.event === 'object' &&
+      data.params.event !== null
+    )
+  }
+}
+
+export namespace WcHelpersUtil {
+  export type SessionEventData = {
+    id: string
+    topic: string
+    params: { chainId: string; event: { data: unknown; name: string } }
   }
 }