Add toy implementation of association rollup

Author: neekolas

Cargo.lock

@@ -1,24 +1,25 @@
 [package]
+edition = "2021"
 name = "xmtp_id"
 version = "0.1.0"
-edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+async-trait.workspace = true
+chrono.workspace = true
+futures.workspace = true
 log.workspace = true
-tracing.workspace = true
-thiserror.workspace = true
-xmtp_cryptography.workspace = true 
-xmtp_mls.workspace = true
-xmtp_proto.workspace = true
-openmls_traits.workspace = true
 openmls.workspace = true
 openmls_basic_credential.workspace = true
 openmls_rust_crypto.workspace = true
+openmls_traits.workspace = true
 prost.workspace = true
-chrono.workspace = true
+rand.workspace = true
 serde.workspace = true
-async-trait.workspace = true
-futures.workspace = true
-
+sha2 = "0.10.8"
+thiserror.workspace = true
+tracing.workspace = true
+xmtp_cryptography.workspace = true
+xmtp_mls.workspace = true
+xmtp_proto.workspace = true

xmtp_id/Cargo.toml

@@ -0,0 +1,42 @@
+#[derive(Clone, Debug, PartialEq)]
+pub enum EntityRole {
+    Installation,
+    Address,
+    LegacyKey,
+}
+
+#[derive(Clone, Debug)]
+pub struct Entity {
+    pub role: EntityRole,
+    pub id: String,
+    pub is_revoked: bool,
+}
+
+impl Entity {
+    pub fn new(role: EntityRole, id: String, is_revoked: bool) -> Self {
+        Self {
+            role,
+            id,
+            is_revoked,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::associations::test_utils;
+
+    use super::*;
+
+    use test_utils::rand_string;
+
+    impl Default for Entity {
+        fn default() -> Self {
+            Self {
+                role: EntityRole::Address,
+                id: rand_string(),
+                is_revoked: false,
+            }
+        }
+    }
+}