Extracted all crdt-related code into a named module

side-node/src/list_transaction_crdt.rs

@@ -0,0 +1,63 @@
+use bft_crdt_derive::add_crdt_fields;
+
+use bft_json_crdt::{
+    json_crdt::{BaseCrdt, CrdtNode, IntoCrdtNode},
+    keypair::{make_keypair, Ed25519KeyPair},
+    list_crdt::ListCrdt,
+};
+
+use serde::{Deserialize, Serialize};
+use serde_json::{json, Value};
+use websockets::WebSocket;
+
+#[add_crdt_fields]
+#[derive(Clone, CrdtNode, Serialize, Deserialize)]
+pub(crate) struct ListExample {
+    pub(crate) list: ListCrdt<Transaction>, // switch to Transaction as soon as char is working
+}
+
+/// A fake Transaction struct we can use as a simulated payload
+#[add_crdt_fields]
+#[derive(Clone, CrdtNode, Serialize, Deserialize)]
+pub(crate) struct Transaction {
+    from: String,
+    to: String,
+    amount: f64,
+}
+
+pub(crate) fn new() -> (BaseCrdt<ListExample>, Ed25519KeyPair) {
+    let keys = make_keypair();
+    let bft_crdt = BaseCrdt::<ListExample>::new(&keys);
+    (bft_crdt, keys)
+}
+
+pub(crate) async fn send(
+    count: u32,
+    bft_crdt: &mut BaseCrdt<ListExample>,
+    ws: &mut WebSocket,
+    keys: &Ed25519KeyPair,
+) -> Result<(), websockets::WebSocketError> {
+    // generate a placeholder transaction
+    let transaction = generate_transaction(count);
+
+    // next job is to keep adding to this guy
+    let signed_op = bft_crdt
+        .doc
+        .list
+        .insert_idx(0, transaction.clone())
+        .sign(&keys);
+    println!("SignedOp being sent is: {:?}", signed_op);
+
+    println!("Sending: {:?}", signed_op);
+    Ok(ws
+        .send_text(serde_json::to_string(&signed_op).unwrap())
+        .await?)
+}
+
+fn generate_transaction(count: u32) -> Value {
+    json!({
+        "from": "Alice",
+        "to": "Bob",
+        "amount": count
+    })
+}