feat(ssv): index additional event fields and mark anonymous

src/modules/validation/ISingleSignerValidation.sol

@@ -7,11 +7,11 @@ interface ISingleSignerValidation is IValidation {
     /// @notice This event is emitted when Signer of the account's validation changes.
     /// @param account The account whose validation Signer changed.
     /// @param entityId The entityId for the account and the signer.
-    /// @param previousSigner The address of the previous signer.
     /// @param newSigner The address of the new signer.
+    /// @param previousSigner The address of the previous signer.
     event SignerTransferred(
-        address indexed account, uint32 indexed entityId, address previousSigner, address newSigner
-    );
+        address indexed account, uint32 indexed entityId, address indexed newSigner, address indexed previousSigner
+    ) anonymous;
 
     error NotAuthorized();
 

src/modules/validation/SingleSignerValidation.sol

@@ -94,10 +94,7 @@ contract SingleSignerValidation is ISingleSignerValidation, BaseModule {
     /// @inheritdoc IValidation
     /// @dev The signature is valid if it is signed by the owner's private key
     /// (if the owner is an EOA) or if it is a valid ERC-1271 signature from the
-    /// owner (if the owner is a contract). Note that unlike the signature
-    /// validation used in `validateUserOp`, this does///*not** wrap the digest in
-    /// an "Ethereum Signed Message" envelope before checking the signature in
-    /// the EOA-owner case.
+    /// owner (if the owner is a contract). Note that the signature is wrapped in an EIP-191 message
     function validateSignature(address account, uint32 entityId, address, bytes32 digest, bytes calldata signature)
         external
         view
@@ -130,6 +127,6 @@ contract SingleSignerValidation is ISingleSignerValidation, BaseModule {
     function _transferSigner(uint32 entityId, address newSigner) internal {
         address previousSigner = signers[entityId][msg.sender];
         signers[entityId][msg.sender] = newSigner;
-        emit SignerTransferred(msg.sender, entityId, previousSigner, newSigner);
+        emit SignerTransferred(msg.sender, entityId, newSigner, previousSigner);
     }
 }

test/module/SingleSignerValidation.t.sol

@@ -26,6 +26,10 @@ contract SingleSignerValidationTest is AccountTestBase {
 
     event ValidationInstalled(address indexed module, uint32 indexed entityId);
 
+    event SignerTransferred(
+        address indexed account, uint32 indexed entityId, address indexed newSigner, address indexed previousSigner
+    ) anonymous;
+
     function setUp() public {
         ethRecipient = makeAddr("ethRecipient");
         (owner2, owner2Key) = makeAddrAndKey("owner2");
@@ -82,6 +86,8 @@ contract SingleSignerValidationTest is AccountTestBase {
         uint32 newEntityId = TEST_DEFAULT_VALIDATION_ENTITY_ID + 1;
         vm.prank(address(entryPoint));
 
+        vm.expectEmit(address(singleSignerValidation));
+        emit SignerTransferred(address(account), newEntityId, owner2, address(0));
         vm.expectEmit(true, true, true, true);
         emit ValidationInstalled(address(singleSignerValidation), newEntityId);
         account.installValidation(