diff --git a/xmtp_proto/Cargo.toml b/xmtp_proto/Cargo.toml
index 9e5ddf30f..d9e651125 100644
--- a/xmtp_proto/Cargo.toml
+++ b/xmtp_proto/Cargo.toml
@@ -34,7 +34,7 @@ test-utils = ["xmtp_common/test-utils"]
 # @@protoc_deletion_point(features)
 # This section is automatically generated by protoc-gen-prost-crate.
 # Changes in this area may be lost on regeneration.
-proto_full = ["xmtp-identity","xmtp-identity-api-v1","xmtp-identity-associations","xmtp-keystore_api-v1","xmtp-message_api-v1","xmtp-message_contents","xmtp-mls-api-v1","xmtp-mls-database","xmtp-mls-message_contents","xmtp-mls_validation-v1","xmtp-xmtpv4-envelopes","xmtp-xmtpv4-message_api","xmtp-xmtpv4-payer_api"]
+proto_full = ["xmtp-identity","xmtp-identity-api-v1","xmtp-identity-associations","xmtp-keystore_api-v1","xmtp-message_api-v1","xmtp-message_contents","xmtp-mls-api-v1","xmtp-mls-database","xmtp-mls-message_contents","xmtp-mls-message_contents-content_types","xmtp-mls_validation-v1","xmtp-xmtpv4-envelopes","xmtp-xmtpv4-message_api","xmtp-xmtpv4-payer_api"]
 "xmtp-identity" = []
 "xmtp-identity-api-v1" = ["xmtp-identity","xmtp-identity-associations"]
 "xmtp-identity-associations" = ["xmtp-identity","xmtp-message_contents"]
@@ -44,6 +44,7 @@ proto_full = ["xmtp-identity","xmtp-identity-api-v1","xmtp-identity-associations
 "xmtp-mls-api-v1" = ["xmtp-message_contents"]
 "xmtp-mls-database" = []
 "xmtp-mls-message_contents" = []
+"xmtp-mls-message_contents-content_types" = ["xmtp-mls-message_contents"]
 "xmtp-mls_validation-v1" = ["xmtp-identity-api-v1","xmtp-identity-associations"]
 "xmtp-xmtpv4-envelopes" = ["xmtp-identity-associations","xmtp-mls-api-v1"]
 "xmtp-xmtpv4-message_api" = ["xmtp-xmtpv4-envelopes"]
diff --git a/xmtp_proto/src/gen/mod.rs b/xmtp_proto/src/gen/mod.rs
index a85c48491..75e14ca71 100644
--- a/xmtp_proto/src/gen/mod.rs
+++ b/xmtp_proto/src/gen/mod.rs
@@ -62,6 +62,12 @@ pub mod xmtp {
         pub mod message_contents {
             include!("xmtp.mls.message_contents.rs");
             // @@protoc_insertion_point(xmtp.mls.message_contents)
+            #[cfg(feature = "xmtp-mls-message_contents-content_types")]
+            // @@protoc_insertion_point(attribute:xmtp.mls.message_contents.content_types)
+            pub mod content_types {
+                include!("xmtp.mls.message_contents.content_types.rs");
+                // @@protoc_insertion_point(xmtp.mls.message_contents.content_types)
+            }
         }
     }
     pub mod mls_validation {
diff --git a/xmtp_proto/src/gen/xmtp.mls.message_contents.content_types.rs b/xmtp_proto/src/gen/xmtp.mls.message_contents.content_types.rs
new file mode 100644
index 000000000..0d53a7deb
--- /dev/null
+++ b/xmtp_proto/src/gen/xmtp.mls.message_contents.content_types.rs
@@ -0,0 +1,232 @@
+// @generated
+// This file is @generated by prost-build.
+/// Reaction message type
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ReactionV2 {
+    /// The message ID being reacted to
+    #[prost(string, tag="1")]
+    pub reference: ::prost::alloc::string::String,
+    /// The inbox ID of the user who sent the message being reacted to
+    /// Optional for group messages
+    #[prost(string, tag="2")]
+    pub reference_inbox_id: ::prost::alloc::string::String,
+    /// The action of the reaction (added or removed)
+    #[prost(enumeration="ReactionAction", tag="3")]
+    pub action: i32,
+    /// The content of the reaction 
+    #[prost(string, tag="4")]
+    pub content: ::prost::alloc::string::String,
+    /// The schema of the reaction content
+    #[prost(enumeration="ReactionSchema", tag="5")]
+    pub schema: i32,
+}
+/// Action enum to represent reaction states
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
+#[repr(i32)]
+pub enum ReactionAction {
+    Unspecified = 0,
+    Added = 1,
+    Removed = 2,
+}
+impl ReactionAction {
+    /// String value of the enum field names used in the ProtoBuf definition.
+    ///
+    /// The values are not transformed in any way and thus are considered stable
+    /// (if the ProtoBuf definition does not change) and safe for programmatic use.
+    pub fn as_str_name(&self) -> &'static str {
+        match self {
+            ReactionAction::Unspecified => "REACTION_ACTION_UNSPECIFIED",
+            ReactionAction::Added => "REACTION_ACTION_ADDED",
+            ReactionAction::Removed => "REACTION_ACTION_REMOVED",
+        }
+    }
+    /// Creates an enum from field names used in the ProtoBuf definition.
+    pub fn from_str_name(value: &str) -> ::core::option::Option<Self> {
+        match value {
+            "REACTION_ACTION_UNSPECIFIED" => Some(Self::Unspecified),
+            "REACTION_ACTION_ADDED" => Some(Self::Added),
+            "REACTION_ACTION_REMOVED" => Some(Self::Removed),
+            _ => None,
+        }
+    }
+}
+/// Schema enum to represent reaction content types
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
+#[repr(i32)]
+pub enum ReactionSchema {
+    Unspecified = 0,
+    Unicode = 1,
+    Shortcode = 2,
+    Custom = 3,
+}
+impl ReactionSchema {
+    /// String value of the enum field names used in the ProtoBuf definition.
+    ///
+    /// The values are not transformed in any way and thus are considered stable
+    /// (if the ProtoBuf definition does not change) and safe for programmatic use.
+    pub fn as_str_name(&self) -> &'static str {
+        match self {
+            ReactionSchema::Unspecified => "REACTION_SCHEMA_UNSPECIFIED",
+            ReactionSchema::Unicode => "REACTION_SCHEMA_UNICODE",
+            ReactionSchema::Shortcode => "REACTION_SCHEMA_SHORTCODE",
+            ReactionSchema::Custom => "REACTION_SCHEMA_CUSTOM",
+        }
+    }
+    /// Creates an enum from field names used in the ProtoBuf definition.
+    pub fn from_str_name(value: &str) -> ::core::option::Option<Self> {
+        match value {
+            "REACTION_SCHEMA_UNSPECIFIED" => Some(Self::Unspecified),
+            "REACTION_SCHEMA_UNICODE" => Some(Self::Unicode),
+            "REACTION_SCHEMA_SHORTCODE" => Some(Self::Shortcode),
+            "REACTION_SCHEMA_CUSTOM" => Some(Self::Custom),
+            _ => None,
+        }
+    }
+}
+/// Encoded file descriptor set for the `xmtp.mls.message_contents.content_types` package
+pub const FILE_DESCRIPTOR_SET: &[u8] = &[
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+    0x72, 0x6f, 0x74, 0x6f, 0x33,
+];
+include!("xmtp.mls.message_contents.content_types.serde.rs");
+// @@protoc_insertion_point(module)
\ No newline at end of file
diff --git a/xmtp_proto/src/gen/xmtp.mls.message_contents.content_types.serde.rs b/xmtp_proto/src/gen/xmtp.mls.message_contents.content_types.serde.rs
new file mode 100644
index 000000000..2d90d1ae3
--- /dev/null
+++ b/xmtp_proto/src/gen/xmtp.mls.message_contents.content_types.serde.rs
@@ -0,0 +1,316 @@
+// @generated
+impl serde::Serialize for ReactionAction {
+    #[allow(deprecated)]
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        let variant = match self {
+            Self::Unspecified => "REACTION_ACTION_UNSPECIFIED",
+            Self::Added => "REACTION_ACTION_ADDED",
+            Self::Removed => "REACTION_ACTION_REMOVED",
+        };
+        serializer.serialize_str(variant)
+    }
+}
+impl<'de> serde::Deserialize<'de> for ReactionAction {
+    #[allow(deprecated)]
+    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        const FIELDS: &[&str] = &[
+            "REACTION_ACTION_UNSPECIFIED",
+            "REACTION_ACTION_ADDED",
+            "REACTION_ACTION_REMOVED",
+        ];
+
+        struct GeneratedVisitor;
+
+        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
+            type Value = ReactionAction;
+
+            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                write!(formatter, "expected one of: {:?}", &FIELDS)
+            }
+
+            fn visit_i64<E>(self, v: i64) -> std::result::Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                i32::try_from(v)
+                    .ok()
+                    .and_then(|x| x.try_into().ok())
+                    .ok_or_else(|| {
+                        serde::de::Error::invalid_value(serde::de::Unexpected::Signed(v), &self)
+                    })
+            }
+
+            fn visit_u64<E>(self, v: u64) -> std::result::Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                i32::try_from(v)
+                    .ok()
+                    .and_then(|x| x.try_into().ok())
+                    .ok_or_else(|| {
+                        serde::de::Error::invalid_value(serde::de::Unexpected::Unsigned(v), &self)
+                    })
+            }
+
+            fn visit_str<E>(self, value: &str) -> std::result::Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                match value {
+                    "REACTION_ACTION_UNSPECIFIED" => Ok(ReactionAction::Unspecified),
+                    "REACTION_ACTION_ADDED" => Ok(ReactionAction::Added),
+                    "REACTION_ACTION_REMOVED" => Ok(ReactionAction::Removed),
+                    _ => Err(serde::de::Error::unknown_variant(value, FIELDS)),
+                }
+            }
+        }
+        deserializer.deserialize_any(GeneratedVisitor)
+    }
+}
+impl serde::Serialize for ReactionSchema {
+    #[allow(deprecated)]
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        let variant = match self {
+            Self::Unspecified => "REACTION_SCHEMA_UNSPECIFIED",
+            Self::Unicode => "REACTION_SCHEMA_UNICODE",
+            Self::Shortcode => "REACTION_SCHEMA_SHORTCODE",
+            Self::Custom => "REACTION_SCHEMA_CUSTOM",
+        };
+        serializer.serialize_str(variant)
+    }
+}
+impl<'de> serde::Deserialize<'de> for ReactionSchema {
+    #[allow(deprecated)]
+    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        const FIELDS: &[&str] = &[
+            "REACTION_SCHEMA_UNSPECIFIED",
+            "REACTION_SCHEMA_UNICODE",
+            "REACTION_SCHEMA_SHORTCODE",
+            "REACTION_SCHEMA_CUSTOM",
+        ];
+
+        struct GeneratedVisitor;
+
+        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
+            type Value = ReactionSchema;
+
+            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                write!(formatter, "expected one of: {:?}", &FIELDS)
+            }
+
+            fn visit_i64<E>(self, v: i64) -> std::result::Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                i32::try_from(v)
+                    .ok()
+                    .and_then(|x| x.try_into().ok())
+                    .ok_or_else(|| {
+                        serde::de::Error::invalid_value(serde::de::Unexpected::Signed(v), &self)
+                    })
+            }
+
+            fn visit_u64<E>(self, v: u64) -> std::result::Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                i32::try_from(v)
+                    .ok()
+                    .and_then(|x| x.try_into().ok())
+                    .ok_or_else(|| {
+                        serde::de::Error::invalid_value(serde::de::Unexpected::Unsigned(v), &self)
+                    })
+            }
+
+            fn visit_str<E>(self, value: &str) -> std::result::Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                match value {
+                    "REACTION_SCHEMA_UNSPECIFIED" => Ok(ReactionSchema::Unspecified),
+                    "REACTION_SCHEMA_UNICODE" => Ok(ReactionSchema::Unicode),
+                    "REACTION_SCHEMA_SHORTCODE" => Ok(ReactionSchema::Shortcode),
+                    "REACTION_SCHEMA_CUSTOM" => Ok(ReactionSchema::Custom),
+                    _ => Err(serde::de::Error::unknown_variant(value, FIELDS)),
+                }
+            }
+        }
+        deserializer.deserialize_any(GeneratedVisitor)
+    }
+}
+impl serde::Serialize for ReactionV2 {
+    #[allow(deprecated)]
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        use serde::ser::SerializeStruct;
+        let mut len = 0;
+        if !self.reference.is_empty() {
+            len += 1;
+        }
+        if !self.reference_inbox_id.is_empty() {
+            len += 1;
+        }
+        if self.action != 0 {
+            len += 1;
+        }
+        if !self.content.is_empty() {
+            len += 1;
+        }
+        if self.schema != 0 {
+            len += 1;
+        }
+        let mut struct_ser = serializer.serialize_struct("xmtp.mls.message_contents.content_types.ReactionV2", len)?;
+        if !self.reference.is_empty() {
+            struct_ser.serialize_field("reference", &self.reference)?;
+        }
+        if !self.reference_inbox_id.is_empty() {
+            struct_ser.serialize_field("referenceInboxId", &self.reference_inbox_id)?;
+        }
+        if self.action != 0 {
+            let v = ReactionAction::try_from(self.action)
+                .map_err(|_| serde::ser::Error::custom(format!("Invalid variant {}", self.action)))?;
+            struct_ser.serialize_field("action", &v)?;
+        }
+        if !self.content.is_empty() {
+            struct_ser.serialize_field("content", &self.content)?;
+        }
+        if self.schema != 0 {
+            let v = ReactionSchema::try_from(self.schema)
+                .map_err(|_| serde::ser::Error::custom(format!("Invalid variant {}", self.schema)))?;
+            struct_ser.serialize_field("schema", &v)?;
+        }
+        struct_ser.end()
+    }
+}
+impl<'de> serde::Deserialize<'de> for ReactionV2 {
+    #[allow(deprecated)]
+    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        const FIELDS: &[&str] = &[
+            "reference",
+            "reference_inbox_id",
+            "referenceInboxId",
+            "action",
+            "content",
+            "schema",
+        ];
+
+        #[allow(clippy::enum_variant_names)]
+        enum GeneratedField {
+            Reference,
+            ReferenceInboxId,
+            Action,
+            Content,
+            Schema,
+        }
+        impl<'de> serde::Deserialize<'de> for GeneratedField {
+            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
+            where
+                D: serde::Deserializer<'de>,
+            {
+                struct GeneratedVisitor;
+
+                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
+                    type Value = GeneratedField;
+
+                    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                        write!(formatter, "expected one of: {:?}", &FIELDS)
+                    }
+
+                    #[allow(unused_variables)]
+                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
+                    where
+                        E: serde::de::Error,
+                    {
+                        match value {
+                            "reference" => Ok(GeneratedField::Reference),
+                            "referenceInboxId" | "reference_inbox_id" => Ok(GeneratedField::ReferenceInboxId),
+                            "action" => Ok(GeneratedField::Action),
+                            "content" => Ok(GeneratedField::Content),
+                            "schema" => Ok(GeneratedField::Schema),
+                            _ => Err(serde::de::Error::unknown_field(value, FIELDS)),
+                        }
+                    }
+                }
+                deserializer.deserialize_identifier(GeneratedVisitor)
+            }
+        }
+        struct GeneratedVisitor;
+        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
+            type Value = ReactionV2;
+
+            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                formatter.write_str("struct xmtp.mls.message_contents.content_types.ReactionV2")
+            }
+
+            fn visit_map<V>(self, mut map_: V) -> std::result::Result<ReactionV2, V::Error>
+                where
+                    V: serde::de::MapAccess<'de>,
+            {
+                let mut reference__ = None;
+                let mut reference_inbox_id__ = None;
+                let mut action__ = None;
+                let mut content__ = None;
+                let mut schema__ = None;
+                while let Some(k) = map_.next_key()? {
+                    match k {
+                        GeneratedField::Reference => {
+                            if reference__.is_some() {
+                                return Err(serde::de::Error::duplicate_field("reference"));
+                            }
+                            reference__ = Some(map_.next_value()?);
+                        }
+                        GeneratedField::ReferenceInboxId => {
+                            if reference_inbox_id__.is_some() {
+                                return Err(serde::de::Error::duplicate_field("referenceInboxId"));
+                            }
+                            reference_inbox_id__ = Some(map_.next_value()?);
+                        }
+                        GeneratedField::Action => {
+                            if action__.is_some() {
+                                return Err(serde::de::Error::duplicate_field("action"));
+                            }
+                            action__ = Some(map_.next_value::<ReactionAction>()? as i32);
+                        }
+                        GeneratedField::Content => {
+                            if content__.is_some() {
+                                return Err(serde::de::Error::duplicate_field("content"));
+                            }
+                            content__ = Some(map_.next_value()?);
+                        }
+                        GeneratedField::Schema => {
+                            if schema__.is_some() {
+                                return Err(serde::de::Error::duplicate_field("schema"));
+                            }
+                            schema__ = Some(map_.next_value::<ReactionSchema>()? as i32);
+                        }
+                    }
+                }
+                Ok(ReactionV2 {
+                    reference: reference__.unwrap_or_default(),
+                    reference_inbox_id: reference_inbox_id__.unwrap_or_default(),
+                    action: action__.unwrap_or_default(),
+                    content: content__.unwrap_or_default(),
+                    schema: schema__.unwrap_or_default(),
+                })
+            }
+        }
+        deserializer.deserialize_struct("xmtp.mls.message_contents.content_types.ReactionV2", FIELDS, GeneratedVisitor)
+    }
+}