feat: throw an exception if provided call method does not exist

.changeset/big-numbers-dress.md

@@ -0,0 +1,5 @@
+---
+'@starknet-react/core': patch
+---
+
+Throw exception if a contract method doesn't exist

packages/core/src/hooks/call.test.tsx

@@ -148,4 +148,30 @@ describe('useStarknetCall', () => {
       })
     })
   })
+
+  describe('when function does not exist', () => {
+    it('returns an error', async () => {
+      const { result } = renderHook(() =>
+        useTestHook({ functionName: 'this_one_doesnt_exist', address, args: [] })
+      )
+
+      await waitFor(() => {
+        expect(result.current.error).toBeDefined()
+        expect(result.current.status).toEqual('error')
+        expect(result.current.data).toBeUndefined()
+        expect(result.current.isIdle).toBeTruthy()
+        expect(result.current.isLoading).toBeFalsy()
+        expect(result.current.isFetching).toBeFalsy()
+        expect(result.current.isSuccess).toBeFalsy()
+        expect(result.current.isError).toBeTruthy()
+        expect(result.current.isFetched).toBeTruthy()
+        expect(result.current.isFetchedAfterMount).toBeTruthy()
+        expect(result.current.isRefetching).toBeFalsy()
+      },
+      {
+        timeout: 30000,
+        interval: 1000,
+      })
+    })
+  })
 })

packages/core/src/hooks/call.ts

@@ -149,8 +149,10 @@ interface ReadContractArgs {
 function readContract({ args }: { args: ReadContractArgs }) {
   return async () => {
     if (!args.args || !args.contract || !args.functionName) return null
-    const call = args.contract && args.functionName && args.contract[args.functionName]
-    if (!call) return null
+    const canCall = args.contract && args.functionName
+    if (!canCall) return null
+    const call = args.contract[args.functionName]
+    if (!call) throw new Error(`Function ${args.functionName} not found on contract`)
 
     return await call(...args.args, {
       blockIdentifier: args.blockIdentifier,