Added trait to interact with database

something which any database related type should implement soon

server-api/db/src/common.rs

@@ -0,0 +1,25 @@
+use mysql_async::Pool;
+use async_trait::async_trait;
+
+use crate::Response;
+use crate::UBigInt;
+
+pub const NO_CONN_MSG: &'static str = "No connection could be established";
+
+/*
+ * NOTE: pay attention to work on async in traits for rust
+ * Each of one these funcs will implicitly do a single heap allocation which
+ * for our case is fine though ideally we don't
+ *
+ * As soon as we finda  way around that we should depecrate `#[async_trait`
+ * for the performance
+ * */
+
+#[async_trait]
+pub trait FromDB<T> {
+    type Row;
+
+    async fn get(p: &Pool, id: UBigInt) -> Response<T>;
+
+    async fn update(p: &Pool, row: T) -> Response<T>;
+}