chore: #2306 repro (#2308)

* repro

* remove .only

* imports

src/utils/signature/verifyTypedData.test.ts

@@ -1,9 +1,14 @@
+import type { Address } from 'abitype'
 import { expect, test } from 'vitest'
 
 import { accounts, typedData } from '~test/src/constants.js'
 
+import { anvilMainnet } from '../../../test/src/anvil.js'
+import { signTypedData } from '../../actions/index.js'
 import { verifyTypedData } from './verifyTypedData.js'
 
+const client = anvilMainnet.getClient()
+
 test('default', async () => {
   expect(
     await verifyTypedData({
@@ -25,3 +30,82 @@ test('default', async () => {
     }),
   ).toBeTruthy()
 })
+
+test('https://github.com/wevm/viem/issues/2306', async () => {
+  const typedData = (address: Address) =>
+    ({
+      types: {
+        WalletData: [{ name: 'address', type: 'address' }],
+      },
+      message: {
+        address,
+      },
+      primaryType: 'WalletData',
+    }) as const
+
+  const address = '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266'
+  const nonChecksumAddress = address.toLowerCase() as `0x${string}`
+  const invalidChecksumAddress = address.replace('f', 'F') as `0x${string}`
+
+  // ✅ Successfully signs with valid checksum address.
+  const signature = await signTypedData(client, {
+    ...typedData(address),
+    account: address,
+  })
+
+  // ✅ Successfully signs with non-checksum address.
+  const signature_2 = await signTypedData(client, {
+    ...typedData(nonChecksumAddress),
+    account: nonChecksumAddress,
+  })
+  expect(signature_2).toEqual(signature)
+
+  // ❌ Throws when invalid checksum address provided.
+  await expect(() =>
+    signTypedData(client, {
+      ...typedData(invalidChecksumAddress),
+      account: invalidChecksumAddress,
+    }),
+  ).rejects.toMatchInlineSnapshot(`
+    [InvalidAddressError: Address "0xF39Fd6e51aad88F6F4ce6aB8827279cffFb92266" is invalid.
+
+    - Address must be a hex value of 20 bytes (40 hex characters).
+    - Address must match its checksum counterpart.
+
+    Version: viem@1.0.2]
+  `)
+
+  // ✅ Successfully verifies with valid checksum address.
+  expect(
+    await verifyTypedData({
+      ...typedData(address),
+      signature,
+      address: address,
+    }),
+  ).toBeTruthy()
+
+  // ✅ Successfully verifies with non-checksum address.
+  expect(
+    await verifyTypedData({
+      ...typedData(nonChecksumAddress),
+      signature,
+      address: nonChecksumAddress,
+    }),
+  ).toBeTruthy()
+
+  // ❌ Throws when invalid checksum address provided.
+  await expect(() =>
+    verifyTypedData({
+      ...typedData(invalidChecksumAddress),
+      signature,
+      address: invalidChecksumAddress,
+    }),
+  ).rejects.toMatchInlineSnapshot(`
+    [InvalidAddressError: Address "0xF39Fd6e51aad88F6F4ce6aB8827279cffFb92266" is invalid.
+
+    - Address must be a hex value of 20 bytes (40 hex characters).
+    - Address must match its checksum counterpart.
+
+    Version: viem@1.0.2]
+  `)
+})