diff --git a/go/keystore_api/v1/keystore.pb.go b/go/keystore_api/v1/keystore.pb.go
index 16b4c7cf..bb3b71f3 100644
--- a/go/keystore_api/v1/keystore.pb.go
+++ b/go/keystore_api/v1/keystore.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: keystore_api/v1/keystore.proto
 
 package v1
diff --git a/go/message_api/v1/authn.pb.go b/go/message_api/v1/authn.pb.go
index a3126aec..2f86aaab 100644
--- a/go/message_api/v1/authn.pb.go
+++ b/go/message_api/v1/authn.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_api/v1/authn.proto
 
 package v1
diff --git a/go/message_api/v1/message_api.pb.go b/go/message_api/v1/message_api.pb.go
index 88c223d6..7834359f 100644
--- a/go/message_api/v1/message_api.pb.go
+++ b/go/message_api/v1/message_api.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_api/v1/message_api.proto
 
 package v1
diff --git a/go/message_api/v1/message_api_grpc.pb.go b/go/message_api/v1/message_api_grpc.pb.go
index 554ccd12..f2453d62 100644
--- a/go/message_api/v1/message_api_grpc.pb.go
+++ b/go/message_api/v1/message_api_grpc.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.3.0
-// - protoc             v4.25.1
+// - protoc             v3.21.12
 // source: message_api/v1/message_api.proto
 
 package v1
diff --git a/go/message_contents/ciphertext.pb.go b/go/message_contents/ciphertext.pb.go
index 528f109f..6caf1a1d 100644
--- a/go/message_contents/ciphertext.pb.go
+++ b/go/message_contents/ciphertext.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/ciphertext.proto
 
 package message_contents
diff --git a/go/message_contents/composite.pb.go b/go/message_contents/composite.pb.go
index 3395357a..cf539786 100644
--- a/go/message_contents/composite.pb.go
+++ b/go/message_contents/composite.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/composite.proto
 
 package message_contents
diff --git a/go/message_contents/contact.pb.go b/go/message_contents/contact.pb.go
index 49bf0b49..1a0edc54 100644
--- a/go/message_contents/contact.pb.go
+++ b/go/message_contents/contact.pb.go
@@ -7,7 +7,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/contact.proto
 
 package message_contents
diff --git a/go/message_contents/content.pb.go b/go/message_contents/content.pb.go
index 26fa2800..25455f53 100644
--- a/go/message_contents/content.pb.go
+++ b/go/message_contents/content.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/content.proto
 
 package message_contents
diff --git a/go/message_contents/conversation_reference.pb.go b/go/message_contents/conversation_reference.pb.go
index d933282d..5599bab9 100644
--- a/go/message_contents/conversation_reference.pb.go
+++ b/go/message_contents/conversation_reference.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/conversation_reference.proto
 
 package message_contents
diff --git a/go/message_contents/invitation.pb.go b/go/message_contents/invitation.pb.go
index 72ac731c..bea21169 100644
--- a/go/message_contents/invitation.pb.go
+++ b/go/message_contents/invitation.pb.go
@@ -5,7 +5,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/invitation.proto
 
 package message_contents
diff --git a/go/message_contents/message.pb.go b/go/message_contents/message.pb.go
index 21fcc9f9..6ace49b3 100644
--- a/go/message_contents/message.pb.go
+++ b/go/message_contents/message.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/message.proto
 
 package message_contents
diff --git a/go/message_contents/private_key.pb.go b/go/message_contents/private_key.pb.go
index bb257bc7..853063df 100644
--- a/go/message_contents/private_key.pb.go
+++ b/go/message_contents/private_key.pb.go
@@ -6,7 +6,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/private_key.proto
 
 package message_contents
diff --git a/go/message_contents/public_key.pb.go b/go/message_contents/public_key.pb.go
index bfa0c886..4faa728e 100644
--- a/go/message_contents/public_key.pb.go
+++ b/go/message_contents/public_key.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/public_key.proto
 
 package message_contents
diff --git a/go/message_contents/signature.pb.go b/go/message_contents/signature.pb.go
index e0cb1fb8..9bd630c4 100644
--- a/go/message_contents/signature.pb.go
+++ b/go/message_contents/signature.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: message_contents/signature.proto
 
 package message_contents
diff --git a/go/mls/api/v1/mls.pb.go b/go/mls/api/v1/mls.pb.go
index 9ad438d7..d0f0002c 100644
--- a/go/mls/api/v1/mls.pb.go
+++ b/go/mls/api/v1/mls.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: mls/api/v1/mls.proto
 
 package v1
diff --git a/go/mls/api/v1/mls_grpc.pb.go b/go/mls/api/v1/mls_grpc.pb.go
index ae6920a9..dad04c7e 100644
--- a/go/mls/api/v1/mls_grpc.pb.go
+++ b/go/mls/api/v1/mls_grpc.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.3.0
-// - protoc             v4.25.1
+// - protoc             v3.21.12
 // source: mls/api/v1/mls.proto
 
 package v1
diff --git a/go/mls_validation/v1/service.pb.go b/go/mls_validation/v1/service.pb.go
index 913585fb..cdba0b77 100644
--- a/go/mls_validation/v1/service.pb.go
+++ b/go/mls_validation/v1/service.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.1
-// 	protoc        v4.25.1
+// 	protoc        v3.21.12
 // source: mls_validation/v1/service.proto
 
 package v1
diff --git a/go/mls_validation/v1/service_grpc.pb.go b/go/mls_validation/v1/service_grpc.pb.go
index 69af37fd..1aa45f6a 100644
--- a/go/mls_validation/v1/service_grpc.pb.go
+++ b/go/mls_validation/v1/service_grpc.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.3.0
-// - protoc             v4.25.1
+// - protoc             v3.21.12
 // source: mls_validation/v1/service.proto
 
 package v1
diff --git a/proto/mls/message_contents/association.proto b/proto/mls/message_contents/association.proto
index 1d2ebb09..b18ab67f 100644
--- a/proto/mls/message_contents/association.proto
+++ b/proto/mls/message_contents/association.proto
@@ -3,6 +3,8 @@ syntax = "proto3";
 
 package xmtp.mls.message_contents;
 
+import "message_contents/public_key.proto";
+
 option go_package = "github.com/xmtp/proto/v3/go/mls/message_contents";
 option java_package = "org.xmtp.proto.mls.message.contents";
 
@@ -13,17 +15,36 @@ enum AssociationTextVersion {
   ASSOCIATION_TEXT_VERSION_1 = 1;
 }
 
-// EIP191Association is used for all EIP 191 compliant wallet signatures
-message Eip191Association {
+// Used for "Grant Messaging Access" associations
+message GrantMessagingAccessAssociation {
   AssociationTextVersion association_text_version = 1;
-  RecoverableEcdsaSignature signature = 2;
+  RecoverableEcdsaSignature signature = 2;  // EIP-191 signature
   string account_address = 3;
-  string iso8601_time = 4;
+  uint64 created_ns = 4;
+}
+
+// Used for "Revoke Messaging Access" associations
+message RevokeMessagingAccessAssociation {
+  AssociationTextVersion association_text_version = 1;
+  RecoverableEcdsaSignature signature = 2;  // EIP-191 signature
+  string account_address = 3;
+  uint64 created_ns = 4;
+}
+
+// LegacyCreateIdentityAssociation is used when a v3 installation key
+// is signed by a v2 identity key, which in turn is signed via a
+// 'CreateIdentity' wallet signature
+message LegacyCreateIdentityAssociation {
+  // Signs SHA-256 hash of installation key
+  RecoverableEcdsaSignature signature = 1;
+  // created_ns is encoded inside serialized key, account_address is recoverable
+  // from the SignedPublicKey signature
+  xmtp.message_contents.SignedPublicKey signed_legacy_create_identity_key = 2;
 }
 
 // RecoverableEcdsaSignature
 message RecoverableEcdsaSignature {
-  // Includes recovery id as the last byte
+  // 65-bytes [ R || S || V ], with recovery id as the last byte
   bytes bytes = 1;
 }
 
diff --git a/proto/mls/message_contents/credential.proto b/proto/mls/message_contents/credential.proto
index b247fd7f..69cee17a 100644
--- a/proto/mls/message_contents/credential.proto
+++ b/proto/mls/message_contents/credential.proto
@@ -12,14 +12,20 @@ option java_package = "org.xmtp.proto.mls.message.contents";
 message MlsCredential {
   bytes installation_public_key = 1;
   oneof association {
-    Eip191Association eip_191 = 2;
+    GrantMessagingAccessAssociation messaging_access = 2;
+    LegacyCreateIdentityAssociation legacy_create_identity = 3;
   }
 }
 
 // A declaration and proof that a credential is no longer valid
 message CredentialRevocation {
-  bytes installation_public_key = 1;
+  oneof public_key {
+    // The 'installation_public_key' field of the MlsCredential proto
+    bytes installation_key = 1;
+    // The 'key_bytes' field of the legacy SignedPublicKey proto
+    bytes unsigned_legacy_create_identity_key = 2;
+  }
   oneof association {
-    Eip191Association eip_191 = 2;
+    RevokeMessagingAccessAssociation messaging_access = 3;
   }
 }