diff --git a/aa-sdk/core/src/account/smartContractAccount.ts b/aa-sdk/core/src/account/smartContractAccount.ts
index 1e9bed30c9..f789e66a33 100644
--- a/aa-sdk/core/src/account/smartContractAccount.ts
+++ b/aa-sdk/core/src/account/smartContractAccount.ts
@@ -14,6 +14,7 @@ import {
   type TypedDataDefinition,
 } from "viem";
 import { toAccount } from "viem/accounts";
+import type { Authorization } from "viem/experimental";
 import { createBundlerClient } from "../client/bundlerClient.js";
 import type {
   EntryPointDef,
@@ -125,6 +126,7 @@ export type SmartContractAccount<
   getFactoryData: () => Promise<Hex>;
   getEntryPoint: () => EntryPointDef<TEntryPointVersion>;
   getImplementationAddress: () => Promise<NullAddress | Address>;
+  signAuthorization?: () => Promise<Authorization<number, true>>;
 };
 // [!endregion SmartContractAccount]
 
@@ -155,7 +157,10 @@ export type ToSmartContractAccountParams<
   // if not provided, will default to just using signMessage over the Hex
   signUserOperationHash?: (uoHash: Hex) => Promise<Hex>;
   encodeUpgradeToAndCall?: (params: UpgradeToAndCallParams) => Promise<Hex>;
-} & Omit<CustomSource, "signTransaction" | "address">;
+} & Omit<
+  CustomSource,
+  "signTransaction" | "address" | "experimental_signAuthorization"
+>;
 // [!endregion ToSmartContractAccountParams]
 
 /**
diff --git a/aa-sdk/core/src/actions/smartAccount/internal/sendUserOperation.ts b/aa-sdk/core/src/actions/smartAccount/internal/sendUserOperation.ts
index e89aeaecc5..558c3de980 100644
--- a/aa-sdk/core/src/actions/smartAccount/internal/sendUserOperation.ts
+++ b/aa-sdk/core/src/actions/smartAccount/internal/sendUserOperation.ts
@@ -50,6 +50,16 @@ export async function _sendUserOperation<
     overrides,
   });
 
+  if (
+    request.signature.startsWith(
+      // TODO: put this in a constant
+      "0x00000000000000000000000000000000000000000000000001ff00"
+    ) &&
+    account.signAuthorization
+  ) {
+    request.authorizationTuple = await account.signAuthorization();
+  }
+
   return {
     hash: await client.sendRawUserOperation(request, entryPoint.address),
     request,
diff --git a/aa-sdk/core/src/entrypoint/0.7.ts b/aa-sdk/core/src/entrypoint/0.7.ts
index 678b4cb5a5..327c80e479 100644
--- a/aa-sdk/core/src/entrypoint/0.7.ts
+++ b/aa-sdk/core/src/entrypoint/0.7.ts
@@ -65,7 +65,7 @@ const packUserOperation = (request: UserOperationRequest<"0.7.0">): Hex => {
       { type: "bytes32" },
     ],
     [
-      request.sender as Address,
+      request.sender,
       hexToBigInt(request.nonce),
       keccak256(initCode),
       keccak256(request.callData),
diff --git a/aa-sdk/core/src/index.ts b/aa-sdk/core/src/index.ts
index 3a30e59763..af5ba54b2e 100644
--- a/aa-sdk/core/src/index.ts
+++ b/aa-sdk/core/src/index.ts
@@ -89,6 +89,7 @@ export {
 } from "./errors/useroperation.js";
 export { LogLevel, Logger } from "./logger.js";
 export { middlewareActions } from "./middleware/actions.js";
+export { default7702UserOpSigner } from "./middleware/defaults/7702signer.js";
 export { defaultFeeEstimator } from "./middleware/defaults/feeEstimator.js";
 export { defaultGasEstimator } from "./middleware/defaults/gasEstimator.js";
 export { defaultPaymasterAndData } from "./middleware/defaults/paymasterAndData.js";
diff --git a/aa-sdk/core/src/middleware/defaults/7702signer.ts b/aa-sdk/core/src/middleware/defaults/7702signer.ts
new file mode 100644
index 0000000000..03653749cc
--- /dev/null
+++ b/aa-sdk/core/src/middleware/defaults/7702signer.ts
@@ -0,0 +1,49 @@
+import { AccountNotFoundError } from "../../errors/account.js";
+import type { ClientMiddlewareFn } from "../types";
+import { defaultUserOpSigner } from "./userOpSigner.js";
+
+/**
+ * Provides a default middleware function for signing user operations with a client account when using ERC-7702 to upgrade local accounts to smart accounts.
+ * If the SmartAccount doesn't support `signAuthorization`, then this just runs the default UserOpSigner middleware
+ *
+ * @param {UserOperationStruct} struct The user operation structure to be signed
+ * @param {*} params The middleware context containing the client and account information
+ * @param {Client} params.client The client object, which should include account and chain information
+ * @param {Account} [params.account] Optional, the account used for signing, defaults to the client's account if not provided
+ * @returns {Promise<UserOperationStruct>} A promise that resolves to the signed user operation structure
+ */
+export const default7702UserOpSigner: ClientMiddlewareFn = async (
+  struct,
+  params
+) => {
+  const uo = await defaultUserOpSigner(struct, params);
+  const account = params.account ?? params.client.account;
+  if (!account) {
+    throw new AccountNotFoundError();
+  }
+
+  if (!account.signAuthorization) {
+    return uo;
+  }
+
+  const code =
+    (await params.client.getCode({ address: account.address })) ?? "0x";
+  // TODO: this isn't the cleanest because now the account implementation HAS to know that it needs to return an impl address
+  // even if the account is not deployed
+  const implAddress = await account.getImplementationAddress();
+  if (
+    code ===
+    "0x00000000000000000000000000000000000000000000000001ff00" +
+      implAddress.slice(2)
+  ) {
+    return uo;
+  }
+
+  return {
+    ...uo,
+    // TODO: put this in a constant
+    signature:
+      "0x00000000000000000000000000000000000000000000000001ff00" +
+      (await uo.signature).slice(2),
+  };
+};
diff --git a/aa-sdk/core/src/types.ts b/aa-sdk/core/src/types.ts
index bbe276f2e4..9bc9fa2b22 100644
--- a/aa-sdk/core/src/types.ts
+++ b/aa-sdk/core/src/types.ts
@@ -5,6 +5,7 @@ import {
   type StateOverride,
   type TransactionReceipt,
 } from "viem";
+import type { Authorization } from "viem/experimental";
 import type { z } from "zod";
 import type {
   UserOperationFeeOptionsFieldSchema,
@@ -205,11 +206,11 @@ export interface UserOperationRequest_v7 {
 // Reference: https://eips.ethereum.org/EIPS/eip-4337#definitions
 export type UserOperationRequest<
   TEntryPointVersion extends EntryPointVersion = EntryPointVersion
-> = TEntryPointVersion extends "0.6.0"
+> = (TEntryPointVersion extends "0.6.0"
   ? UserOperationRequest_v6
   : TEntryPointVersion extends "0.7.0"
   ? UserOperationRequest_v7
-  : never;
+  : never) & { authorizationTuple?: Authorization };
 
 // [!endregion UserOperationRequest]
 
diff --git a/aa-sdk/core/src/version.ts b/aa-sdk/core/src/version.ts
index 20a5944aef..9bd0555a10 100644
--- a/aa-sdk/core/src/version.ts
+++ b/aa-sdk/core/src/version.ts
@@ -1,3 +1,3 @@
 // This file is autogenerated by inject-version.ts. Any changes will be
 // overwritten on commit!
-export const VERSION = "4.5.1";
+export const VERSION = "4.6.0";
diff --git a/account-kit/core/src/version.ts b/account-kit/core/src/version.ts
index 20a5944aef..9bd0555a10 100644
--- a/account-kit/core/src/version.ts
+++ b/account-kit/core/src/version.ts
@@ -1,3 +1,3 @@
 // This file is autogenerated by inject-version.ts. Any changes will be
 // overwritten on commit!
-export const VERSION = "4.5.1";
+export const VERSION = "4.6.0";
diff --git a/account-kit/infra/src/version.ts b/account-kit/infra/src/version.ts
index 20a5944aef..9bd0555a10 100644
--- a/account-kit/infra/src/version.ts
+++ b/account-kit/infra/src/version.ts
@@ -1,3 +1,3 @@
 // This file is autogenerated by inject-version.ts. Any changes will be
 // overwritten on commit!
-export const VERSION = "4.5.1";
+export const VERSION = "4.6.0";
diff --git a/account-kit/plugingen/src/version.ts b/account-kit/plugingen/src/version.ts
index 20a5944aef..9bd0555a10 100644
--- a/account-kit/plugingen/src/version.ts
+++ b/account-kit/plugingen/src/version.ts
@@ -1,3 +1,3 @@
 // This file is autogenerated by inject-version.ts. Any changes will be
 // overwritten on commit!
-export const VERSION = "4.5.1";
+export const VERSION = "4.6.0";
diff --git a/account-kit/react/src/version.ts b/account-kit/react/src/version.ts
index 20a5944aef..9bd0555a10 100644
--- a/account-kit/react/src/version.ts
+++ b/account-kit/react/src/version.ts
@@ -1,3 +1,3 @@
 // This file is autogenerated by inject-version.ts. Any changes will be
 // overwritten on commit!
-export const VERSION = "4.5.1";
+export const VERSION = "4.6.0";
diff --git a/account-kit/signer/src/version.ts b/account-kit/signer/src/version.ts
index 20a5944aef..9bd0555a10 100644
--- a/account-kit/signer/src/version.ts
+++ b/account-kit/signer/src/version.ts
@@ -1,3 +1,3 @@
 // This file is autogenerated by inject-version.ts. Any changes will be
 // overwritten on commit!
-export const VERSION = "4.5.1";
+export const VERSION = "4.6.0";
diff --git a/site/pages/reference/aa-sdk/core/functions/default7702UserOpSigner.mdx b/site/pages/reference/aa-sdk/core/functions/default7702UserOpSigner.mdx
new file mode 100644
index 0000000000..f5fcc4ac66
--- /dev/null
+++ b/site/pages/reference/aa-sdk/core/functions/default7702UserOpSigner.mdx
@@ -0,0 +1,43 @@
+---
+# This file is autogenerated
+title: default7702UserOpSigner
+description: Overview of the default7702UserOpSigner method
+---
+
+# default7702UserOpSigner
+
+Provides a default middleware function for signing user operations with a client account when using ERC-7702 to upgrade local accounts to smart accounts.
+If the SmartAccount doesn't support `signAuthorization`, then this just runs the default UserOpSigner middleware
+
+## Import
+
+```ts
+import { default7702UserOpSigner } from "@aa-sdk/core";
+```
+
+## Parameters
+
+### struct
+
+`UserOperationStruct`
+The user operation structure to be signed
+
+### params
+
+`*`
+The middleware context containing the client and account information
+
+### params.client
+
+`Client`
+The client object, which should include account and chain information
+
+### params.account
+
+`Account`
+Optional, the account used for signing, defaults to the client's account if not provided
+
+## Returns
+
+`Promise<UserOperationStruct>`
+A promise that resolves to the signed user operation structure