feat: specify owner index on coinbase smart wallet (#2896)

* feat: specify owner index on coinbase smart wallet

* chore: up

* chore: up

* Update wise-clouds-complain.md

* Update toCoinbaseSmartAccount.md

---------

Co-authored-by: jxom <j@wevm.dev>
Co-authored-by: jxom <jakemoxey@gmail.com>

.changeset/wise-clouds-complain.md

@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added `ownerIndex` parameter to `toCoinbaseSmartWallet`.

site/pages/account-abstraction/accounts/smart/toCoinbaseSmartAccount.md

@@ -86,6 +86,20 @@ const account = await toCoinbaseSmartAccount({
 })
 ```
 
+### ownerIndex (optional)
+
+- **Type:** `number`
+
+Index of the owner to use for signing messages & User Operations.
+
+```ts
+const account = await toCoinbaseSmartAccount({
+  client,
+  owners: [privateKeyToAccount('0x...'), privateKeyToAccount('0x...')],
+  ownerIndex: 1, // [!code focus]
+})
+```
+
 ### nonce (optional)
 
 - **Type:** `bigint`

src/account-abstraction/accounts/implementations/toCoinbaseSmartAccount.test.ts

@@ -31,6 +31,9 @@ const client = anvilMainnet.getClient({ account: true })
 const bundlerClient = bundlerMainnet.getBundlerClient({ client })
 
 const owner = privateKeyToAccount(accounts[0].privateKey)
+const owner_webauthn = toWebAuthnAccount({
+  credential: { id: 'abc', publicKey: '0xdeadbeef' },
+})
 
 describe('return value: encodeCalls', () => {
   test('single', async () => {
@@ -244,20 +247,57 @@ describe('return value: getStubSignature', () => {
   })
 
   test('default: webauthn', async () => {
-    const owner = toWebAuthnAccount({
-      credential: { id: 'abc', publicKey: '0xdeadbeef' },
-    })
-
     const account = await toCoinbaseSmartAccount({
       client,
-      owners: [owner],
+      owners: [owner_webauthn],
     })
 
     const signature = await account.getStubSignature()
     expect(signature).toMatchInlineSnapshot(
       `"0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000170000000000000000000000000000000000000000000000000000000000000001949fc7c88032b9fcb5f6efc7a7b8c63668eae9871b765e23123bb473ff57aa831a7c0d9276168ebcc29f2875a0239cffdf2a9cd1c2007c5c77c071db9264df1d000000000000000000000000000000000000000000000000000000000000002549960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008a7b2274797065223a22776562617574686e2e676574222c226368616c6c656e6765223a2273496a396e6164474850596759334b7156384f7a4a666c726275504b474f716d59576f4d57516869467773222c226f726967696e223a2268747470733a2f2f7369676e2e636f696e626173652e636f6d222c2263726f73734f726967696e223a66616c73657d00000000000000000000000000000000000000000000"`,
     )
   })
+
+  test('custom: ownerIndex', async () => {
+    {
+      const account = await toCoinbaseSmartAccount({
+        client,
+        owners: [owner, owner_webauthn, owner],
+        ownerIndex: 1,
+      })
+
+      const signature = await account.getStubSignature()
+      expect(signature).toMatchInlineSnapshot(
+        `"0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000170000000000000000000000000000000000000000000000000000000000000001949fc7c88032b9fcb5f6efc7a7b8c63668eae9871b765e23123bb473ff57aa831a7c0d9276168ebcc29f2875a0239cffdf2a9cd1c2007c5c77c071db9264df1d000000000000000000000000000000000000000000000000000000000000002549960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008a7b2274797065223a22776562617574686e2e676574222c226368616c6c656e6765223a2273496a396e6164474850596759334b7156384f7a4a666c726275504b474f716d59576f4d57516869467773222c226f726967696e223a2268747470733a2f2f7369676e2e636f696e626173652e636f6d222c2263726f73734f726967696e223a66616c73657d00000000000000000000000000000000000000000000"`,
+      )
+    }
+
+    {
+      const account = await toCoinbaseSmartAccount({
+        client,
+        owners: [owner, owner_webauthn, owner],
+        ownerIndex: 2,
+      })
+
+      const signature = await account.getStubSignature()
+      expect(signature).toMatchInlineSnapshot(
+        `"0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000041fffffffffffffffffffffffffffffff0000000000000000000000000000000007aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1c00000000000000000000000000000000000000000000000000000000000000"`,
+      )
+    }
+
+    {
+      const account = await toCoinbaseSmartAccount({
+        client,
+        owners: [owner],
+        ownerIndex: 1,
+      })
+
+      const signature = await account.getStubSignature()
+      expect(signature).toMatchInlineSnapshot(
+        `"0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000041fffffffffffffffffffffffffffffff0000000000000000000000000000000007aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1c00000000000000000000000000000000000000000000000000000000000000"`,
+      )
+    }
+  })
 })
 
 describe('return value: getNonce', () => {

src/account-abstraction/accounts/implementations/toCoinbaseSmartAccount.ts

@@ -35,6 +35,7 @@ import type {
 export type ToCoinbaseSmartAccountParameters = {
   address?: Address | undefined
   client: Client
+  ownerIndex?: number | undefined
   owners: readonly OneOf<LocalAccount | WebAuthnAccount>[]
   nonce?: bigint | undefined
 }
@@ -74,7 +75,7 @@ export type CoinbaseSmartAccountImplementation = Assign<
 export async function toCoinbaseSmartAccount(
   parameters: ToCoinbaseSmartAccountParameters,
 ): Promise<ToCoinbaseSmartAccountReturnType> {
-  const { client, owners, nonce = 0n } = parameters
+  const { client, ownerIndex = 0, owners, nonce = 0n } = parameters
 
   let address = parameters.address
 
@@ -92,7 +93,7 @@ export async function toCoinbaseSmartAccount(
     owner.type === 'webAuthn' ? owner.publicKey : pad(owner.address),
   )
 
-  const owner = owners[0]
+  const owner = owners[ownerIndex] ?? owners[0]
 
   return toSmartAccount({
     client,
@@ -161,6 +162,7 @@ export async function toCoinbaseSmartAccount(
       if (owner.type === 'webAuthn')
         return '0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000170000000000000000000000000000000000000000000000000000000000000001949fc7c88032b9fcb5f6efc7a7b8c63668eae9871b765e23123bb473ff57aa831a7c0d9276168ebcc29f2875a0239cffdf2a9cd1c2007c5c77c071db9264df1d000000000000000000000000000000000000000000000000000000000000002549960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008a7b2274797065223a22776562617574686e2e676574222c226368616c6c656e6765223a2273496a396e6164474850596759334b7156384f7a4a666c726275504b474f716d59576f4d57516869467773222c226f726967696e223a2268747470733a2f2f7369676e2e636f696e626173652e636f6d222c2263726f73734f726967696e223a66616c73657d00000000000000000000000000000000000000000000'
       return wrapSignature({
+        ownerIndex,
         signature:
           '0xfffffffffffffffffffffffffffffff0000000000000000000000000000000007aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1c',
       })
@@ -178,6 +180,7 @@ export async function toCoinbaseSmartAccount(
       const signature = await sign({ hash, owner })
 
       return wrapSignature({
+        ownerIndex,
         signature,
       })
     },
@@ -195,6 +198,7 @@ export async function toCoinbaseSmartAccount(
       const signature = await sign({ hash, owner })
 
       return wrapSignature({
+        ownerIndex,
         signature,
       })
     },
@@ -218,6 +222,7 @@ export async function toCoinbaseSmartAccount(
       const signature = await sign({ hash, owner })
 
       return wrapSignature({
+        ownerIndex,
         signature,
       })
     },
@@ -239,6 +244,7 @@ export async function toCoinbaseSmartAccount(
       const signature = await sign({ hash, owner })
 
       return wrapSignature({
+        ownerIndex,
         signature,
       })
     },