diff --git a/Sources/Anoncreds/anoncreds_uniffi.swift b/Sources/Anoncreds/anoncreds_uniffi.swift
index 47974be..874e0b3 100644
--- a/Sources/Anoncreds/anoncreds_uniffi.swift
+++ b/Sources/Anoncreds/anoncreds_uniffi.swift
@@ -1637,7 +1637,9 @@ public func FfiConverterTypeRevocationRegistryDefinition_lower(_ value: Revocati
     return FfiConverterTypeRevocationRegistryDefinition.lower(value)
 }
 
-public protocol RevocationRegistryDefinitionPrivateProtocol {}
+public protocol RevocationRegistryDefinitionPrivateProtocol {
+    func toJson() -> String
+}
 
 public class RevocationRegistryDefinitionPrivate: RevocationRegistryDefinitionPrivateProtocol {
     fileprivate let pointer: UnsafeMutableRawPointer
@@ -1649,9 +1651,26 @@ public class RevocationRegistryDefinitionPrivate: RevocationRegistryDefinitionPr
         self.pointer = pointer
     }
 
+    public convenience init(json: String) throws {
+        try self.init(unsafeFromRawPointer: rustCallWithError(FfiConverterTypeErrorCode.lift) {
+            uniffi_anoncreds_uniffi_fn_constructor_revocationregistrydefinitionprivate_new(
+                FfiConverterString.lower(json), $0
+            )
+        })
+    }
+
     deinit {
         try! rustCall { uniffi_anoncreds_uniffi_fn_free_revocationregistrydefinitionprivate(pointer, $0) }
     }
+
+    public func toJson() -> String {
+        return try! FfiConverterString.lift(
+            try!
+                rustCall {
+                    uniffi_anoncreds_uniffi_fn_method_revocationregistrydefinitionprivate_to_json(self.pointer, $0)
+                }
+        )
+    }
 }
 
 public struct FfiConverterTypeRevocationRegistryDefinitionPrivate: FfiConverter {
@@ -2974,6 +2993,9 @@ private var initializationResult: InitializationResult {
     if uniffi_anoncreds_uniffi_checksum_method_revocationregistrydefinition_to_json() != 31175 {
         return InitializationResult.apiChecksumMismatch
     }
+    if uniffi_anoncreds_uniffi_checksum_method_revocationregistrydefinitionprivate_to_json() != 37971 {
+        return InitializationResult.apiChecksumMismatch
+    }
     if uniffi_anoncreds_uniffi_checksum_method_revocationregistrydelta_to_json() != 15053 {
         return InitializationResult.apiChecksumMismatch
     }
@@ -3040,6 +3062,9 @@ private var initializationResult: InitializationResult {
     if uniffi_anoncreds_uniffi_checksum_constructor_revocationregistrydefinition_new() != 3510 {
         return InitializationResult.apiChecksumMismatch
     }
+    if uniffi_anoncreds_uniffi_checksum_constructor_revocationregistrydefinitionprivate_new() != 53969 {
+        return InitializationResult.apiChecksumMismatch
+    }
     if uniffi_anoncreds_uniffi_checksum_constructor_revocationregistrydelta_new() != 59759 {
         return InitializationResult.apiChecksumMismatch
     }
diff --git a/anoncreds/src/lib.rs b/anoncreds/src/lib.rs
index bcf48d0..8290d7b 100644
--- a/anoncreds/src/lib.rs
+++ b/anoncreds/src/lib.rs
@@ -1,12 +1,11 @@
 mod uffi;
-use anoncreds::types::RevocationRegistryDefinitionPrivate;
 use uffi::issuer::Issuer;
 use uffi::prover::Prover;
 use uffi::types::{
     Credential, CredentialDefinition, CredentialDefinitionPrivate, CredentialKeyCorrectnessProof,
     CredentialOffer, CredentialRequest, CredentialRequestMetadata, CredentialRevocationState,
-    Presentation, PresentationRequest, RevocationRegistryDefinition, RevocationRegistryDelta,
-    RevocationStatusList, Schema,
+    Presentation, PresentationRequest, RevocationRegistryDefinition,
+    RevocationRegistryDefinitionPrivate, RevocationRegistryDelta, RevocationStatusList, Schema,
 };
 use uffi::verifier::Verifier;
 
diff --git a/anoncreds/src/uffi/issuer.rs b/anoncreds/src/uffi/issuer.rs
index aee20c0..8adc147 100644
--- a/anoncreds/src/uffi/issuer.rs
+++ b/anoncreds/src/uffi/issuer.rs
@@ -2,7 +2,8 @@ use super::error::ErrorCode;
 use super::types::{
     Credential, CredentialDefinition, CredentialDefinitionPrivate, CredentialDefinitionTuple,
     CredentialKeyCorrectnessProof, CredentialOffer, CredentialRequest, CredentialRevocationConfig,
-    RevocationRegistryDefinition, RevocationRegistryDefinitionTuple, RevocationStatusList, Schema,
+    RevocationRegistryDefinition, RevocationRegistryDefinitionPrivate,
+    RevocationRegistryDefinitionTuple, RevocationStatusList, Schema,
 };
 use anoncreds::data_types::{cred_def::SignatureType, rev_reg_def::RegistryType};
 use anoncreds::issuer::{
@@ -11,9 +12,7 @@ use anoncreds::issuer::{
     update_revocation_status_list,
 };
 use anoncreds::tails::TailsFileWriter;
-use anoncreds::types::{
-    CredentialDefinitionConfig, MakeCredentialValues, RevocationRegistryDefinitionPrivate,
-};
+use anoncreds::types::{CredentialDefinitionConfig, MakeCredentialValues};
 use std::collections::BTreeSet;
 use std::collections::HashMap;
 use std::sync::Arc;
@@ -112,7 +111,7 @@ impl Issuer {
         )?;
         Ok(RevocationRegistryDefinitionTuple {
             rev_reg_def: Arc::new(RevocationRegistryDefinition(rev_reg_def)),
-            rev_reg_def_priv: Arc::new(rev_reg_def_private),
+            rev_reg_def_priv: Arc::new(RevocationRegistryDefinitionPrivate(rev_reg_def_private)),
         })
     }
 
@@ -131,7 +130,7 @@ impl Issuer {
                 .try_into()
                 .map_err(|err| anoncreds::Error::from(err))?,
             &rev_reg_def.0,
-            &rev_reg_priv,
+            &rev_reg_priv.0,
             issuance_by_default,
             timestamp,
         )?;
@@ -153,7 +152,7 @@ impl Issuer {
         let rev_status_list = update_revocation_status_list(
             &cred_def.0,
             &rev_reg_def.0,
-            &rev_reg_priv,
+            &rev_reg_priv.0,
             &current_list.0,
             issued,
             revoked,
diff --git a/anoncreds/src/uffi/types.rs b/anoncreds/src/uffi/types.rs
index ef7d65c..cd3ba4b 100644
--- a/anoncreds/src/uffi/types.rs
+++ b/anoncreds/src/uffi/types.rs
@@ -13,7 +13,7 @@ use anoncreds::types::{
     CredentialRevocationState as RustCredentialRevocationState, Presentation as RustPresentation,
     PresentationRequest as RustPresentationRequest,
     RevocationRegistryDefinition as RustRevocationRegistryDefinition,
-    RevocationRegistryDefinitionPrivate,
+    RevocationRegistryDefinitionPrivate as RustRevocationRegistryDefinitionPrivate,
 };
 use anoncreds_clsignatures::RevocationRegistryDelta as RustRevocationRegistryDelta;
 use std::collections::HashMap;
@@ -175,7 +175,7 @@ impl<'a> From<&'a CredentialRevocationConfig> for RustCredentialRevocationConfig
     fn from(revocation_config: &'a CredentialRevocationConfig) -> Self {
         RustCredentialRevocationConfig {
             reg_def: &revocation_config.reg_def.0,
-            reg_def_private: &revocation_config.reg_def_private,
+            reg_def_private: &revocation_config.reg_def_private.0,
             status_list: &revocation_config.status_list.0,
             registry_idx: revocation_config.registry_index,
         }
@@ -240,9 +240,9 @@ macro_rules! define_serializable_struct {
         impl $struct_name {
             #[uniffi::constructor]
             pub fn new(json: String) -> Result<Arc<Self>, ErrorCode> {
-                Ok(Arc::new(Self(serde_json::from_str::<
-                    $rust_struct_name,
-                >(&json)?)))
+                Ok(Arc::new(Self(serde_json::from_str::<$rust_struct_name>(
+                    &json,
+                )?)))
             }
 
             pub fn to_json(&self) -> String {
@@ -253,7 +253,10 @@ macro_rules! define_serializable_struct {
 }
 
 define_serializable_struct!(CredentialDefinitionPrivate, RustCredentialDefinitionPrivate);
-define_serializable_struct!(CredentialKeyCorrectnessProof, RustCredentialKeyCorrectnessProof);
+define_serializable_struct!(
+    CredentialKeyCorrectnessProof,
+    RustCredentialKeyCorrectnessProof
+);
 define_serializable_struct!(CredentialRequest, RustCredentialRequest);
 define_serializable_struct!(CredentialRequestMetadata, RustCredentialRequestMetadata);
 define_serializable_struct!(RevocationRegistryDelta, RustRevocationRegistryDelta);
@@ -261,3 +264,7 @@ define_serializable_struct!(CredentialRevocationState, RustCredentialRevocationS
 define_serializable_struct!(RevocationStatusList, RustRevocationStatusList);
 define_serializable_struct!(PresentationRequest, RustPresentationRequest);
 define_serializable_struct!(Presentation, RustPresentation);
+define_serializable_struct!(
+    RevocationRegistryDefinitionPrivate,
+    RustRevocationRegistryDefinitionPrivate
+);