diff --git a/Cargo.lock b/Cargo.lock
index 322deed..40da76b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,6 +17,17 @@ version = "1.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08f9b8508dccb7687a1d6c4ce66b2b0ecef467c94667de27d8d7fe1f8d2a9cdc"
 
+[[package]]
+name = "async-trait"
+version = "0.1.56"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96cf8829f67d2eab0b2dfa42c5d0ef737e0724e4a82b01b3e292456202b19716"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -94,6 +105,19 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "chrono"
+version = "0.4.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "670ad68c9088c2a963aaa298cb369688cf3f9465ce5e2d4ca10e6e0098a1ce73"
+dependencies = [
+ "libc",
+ "num-integer",
+ "num-traits",
+ "time",
+ "winapi",
+]
+
 [[package]]
 name = "clap"
 version = "3.1.18"
@@ -188,6 +212,8 @@ name = "cove-tui"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "async-trait",
+ "chrono",
  "clap",
  "crossterm",
  "futures",
@@ -397,7 +423,7 @@ checksum = "9be70c98951c83b8d2f8f60d7065fa6d5146873094452a1008da8c2f1e4205ad"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi 0.10.2+wasi-snapshot-preview1",
+ "wasi 0.10.0+wasi-snapshot-preview1",
 ]
 
 [[package]]
@@ -544,6 +570,25 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "num-integer"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
+dependencies = [
+ "autocfg",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.13.1"
@@ -947,9 +992,9 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "1.0.95"
+version = "1.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fbaf6116ab8924f39d52792136fb74fd60a80194cf1b1c6ffa6453eef1c3f942"
+checksum = "0748dd251e24453cb8717f0354206b91557e4ec8703673a4b30208f2abaf1ebf"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -991,6 +1036,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "time"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
+dependencies = [
+ "libc",
+ "wasi 0.10.0+wasi-snapshot-preview1",
+ "winapi",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.6.0"
@@ -1187,9 +1243,9 @@ checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
 name = "wasi"
-version = "0.10.2+wasi-snapshot-preview1"
+version = "0.10.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
+checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
 
 [[package]]
 name = "wasi"
diff --git a/cove-tui/Cargo.toml b/cove-tui/Cargo.toml
index 457ae26..c401e6c 100644
--- a/cove-tui/Cargo.toml
+++ b/cove-tui/Cargo.toml
@@ -5,6 +5,8 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0.57"
+async-trait = "0.1.56"
+chrono = "0.4.19"
 clap = { version = "3.1.18", features = ["derive"] }
 crossterm = { version = "0.23.2", features = ["event-stream"] }
 futures = "0.3.21"
diff --git a/cove-tui/src/main.rs b/cove-tui/src/main.rs
index f3e5aa9..5c1f7bf 100644
--- a/cove-tui/src/main.rs
+++ b/cove-tui/src/main.rs
@@ -1,5 +1,6 @@
 #![warn(clippy::use_self)]
 
+mod traits;
 mod ui;
 
 use toss::terminal::Terminal;
diff --git a/cove-tui/src/traits.rs b/cove-tui/src/traits.rs
new file mode 100644
index 0000000..fcfebe3
--- /dev/null
+++ b/cove-tui/src/traits.rs
@@ -0,0 +1,16 @@
+use async_trait::async_trait;
+use chrono::{DateTime, Utc};
+
+pub trait Msg {
+    type Id;
+    fn id(&self) -> Self::Id;
+
+    fn time(&self) -> DateTime<Utc>;
+    fn nick(&self) -> String;
+    fn content(&self) -> String;
+}
+
+#[async_trait]
+pub trait MsgStore<M: Msg> {
+    async fn path(room: &str, id: M::Id) -> Vec<M::Id>;
+}