Add deposit totals API endpoint

GET /api/deposits/totals returns fiat deposited per exchange per currency
from bank_to_exchange events, aggregated via SQL.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

resources/queries.sql

@@ -125,6 +125,16 @@ LEFT JOIN wallets tw ON tw.id = e.to_wallet_id
 WHERE e.from_wallet_id = :wallet-id OR e.to_wallet_id = :wallet-id
 ORDER BY e.occurred_at DESC
 
+-- :name get-deposit-totals :? :*
+-- :doc Total fiat deposited per exchange per currency from bank_to_exchange events
+SELECT tw.name AS exchange, e.fiat_currency AS currency,
+       SUM(e.fiat_amount) AS total
+FROM events e
+JOIN wallets tw ON tw.id = e.to_wallet_id
+WHERE e.event_type = 'bank_to_exchange'
+GROUP BY tw.name, e.fiat_currency
+ORDER BY tw.name, e.fiat_currency
+
 -- :name get-wallet-balances :? :*
 -- :doc Compute sats balance per wallet from events
 SELECT w.id, w.name,

src/clj/pmagnus/btcdata/web/controllers/transactions.clj

@@ -39,6 +39,9 @@
         (query-fn :insert-event! row)
         (response/created "/api/events" {:status "ok"})))))
 
+(defn get-deposit-totals [{:keys [query-fn]} _req]
+  (response/ok (query-fn :get-deposit-totals {})))
+
 (defn list-events [{:keys [query-fn]} req]
   (let [event-type (get-in req [:query-params "type"])]
     (if event-type

src/clj/pmagnus/btcdata/web/routes/api.clj

@@ -172,7 +172,9 @@
     {:get (fn [req] (tx/get-wallet-events opts req))}]
    ["/events"
     {:get  (fn [req] (tx/list-events opts req))
-     :post (fn [req] (tx/create-event! opts req))}]])
+     :post (fn [req] (tx/create-event! opts req))}]
+   ["/deposits/totals"
+    {:get (fn [req] (tx/get-deposit-totals opts req))}]])
 
 (defn route-data [opts]
   (merge