fix(#2653): stake key voting power calculation

CHANGELOG.md

@@ -16,7 +16,7 @@ changes.
 
 ### Fixed
 
--
+- Fix calculating stake key balance [Issue 2653](https://github.com/IntersectMBO/govtool/issues/2653)
 
 ### Changed
 

govtool/backend/sql/get-stake-key-voting-power.sql

@@ -1,46 +1,10 @@
-WITH RewardRest AS (
-  SELECT 
-    SUM(amount) AS amount,
-    addr_id
-  FROM
-    reward_rest
-  GROUP BY
-    addr_id
-),
-Reward AS (
-  SELECT
-    SUM(amount) AS amount,
-    addr_id
-  FROM
-    reward
-  GROUP BY
-    addr_id
-),
-Balance AS (
-  SELECT
-    COALESCE(SUM(uv.value), 0) AS amount,
-    sa.id AS addr_id,
-    encode(sa.hash_raw, 'hex') AS addr_raw
-  FROM
-    stake_address sa
-  JOIN utxo_view uv ON uv.stake_address_id = sa.id
-  GROUP BY
-    addr_id,
-    addr_raw
-)
 SELECT
-  (COALESCE(rr.amount, 0) + COALESCE(r.amount, 0) + COALESCE(b.amount, 0)) AS total_balance,
-  b.addr_raw
+  SUM(tx_out.value)
 FROM
-  Balance b
+  stake_address
+JOIN
+  tx_out on tx_out.stake_address_id = stake_address.id
 LEFT JOIN
-  RewardRest rr ON rr.addr_id = b.addr_id
-LEFT JOIN
-  Reward r ON r.addr_id = rr.addr_id
+  tx_in ON tx_in.tx_out_id = tx_out.id AND tx_in.tx_out_index = tx_out.index
 WHERE
-  b.addr_id = (SELECT id FROM stake_address WHERE hash_raw = decode(?, 'hex'))
-GROUP BY
-  b.addr_raw,
-  rr.amount,
-  r.amount,
-  b.amount
+  stake_address.hash_raw = decode(?, 'hex') AND tx_in.id IS NULL;