diff --git a/packages/wallet/core/src/signers/index.ts b/packages/wallet/core/src/signers/index.ts
index 80ccc07f1..a130a7751 100644
--- a/packages/wallet/core/src/signers/index.ts
+++ b/packages/wallet/core/src/signers/index.ts
@@ -1,5 +1,5 @@
 import { Config, Payload, Signature } from '@0xsequence/wallet-primitives'
-import { Address, Hex } from 'ox'
+import { Address, Hex, Bytes } from 'ox'
 import * as State from '../state/index.js'
 
 export * as Pk from './pk/index.js'
@@ -11,6 +11,8 @@ export * from './guard.js'
 export interface Signer {
   readonly address: MaybePromise<Address.Address>
 
+  signDigest: (digest: Bytes.Bytes) => Config.SignerSignature<Signature.SignatureOfSignerLeaf>
+
   sign: (
     wallet: Address.Address,
     chainId: number,
diff --git a/packages/wallet/wdk/src/sequence/wallets.ts b/packages/wallet/wdk/src/sequence/wallets.ts
index a859ca797..a7a6d5a3f 100644
--- a/packages/wallet/wdk/src/sequence/wallets.ts
+++ b/packages/wallet/wdk/src/sequence/wallets.ts
@@ -620,7 +620,7 @@ export class Wallets implements WalletsInterface {
     return undo
   }
 
-  private async prepareSignUp(args: SignupArgs): Promise<{
+  async prepareLoginSigner(args: SignupArgs): Promise<{
     signer: (Signers.Signer | Signers.SapientSigner) & Signers.Witnessable
     extra: WitnessExtraSignerKind
     loginEmail?: string
@@ -737,7 +737,7 @@ export class Wallets implements WalletsInterface {
   }
 
   async signUp(args: SignupArgs): Promise<Address.Address | undefined> {
-    const loginSigner = await this.prepareSignUp(args)
+    const loginSigner = await this.prepareLoginSigner(args)
 
     args.onStatusChange?.({ type: 'login-signer-created', address: await loginSigner.signer.address })