diff --git a/web/backend/src/m2_market_web/ledger.py b/web/backend/src/m2_market_web/ledger.py
index d0ca314..3c54908 100644
--- a/web/backend/src/m2_market_web/ledger.py
+++ b/web/backend/src/m2_market_web/ledger.py
@@ -21,8 +21,8 @@ def _headers() -> dict[str, str]:
 def _tx_dto(tx: dict[str, Any]) -> dict[str, Any]:
     return {
         "ts": tx.get("ts"),
-        "from": tx.get("from"),
-        "to": tx.get("to"),
+        "from": tx.get("from_id", tx.get("from")),
+        "to": tx.get("to_id", tx.get("to")),
         "amount": tx.get("amount"),
         "reason": tx.get("reason"),
         "ref": tx.get("ref"),
@@ -91,7 +91,7 @@ async def economy() -> dict[str, Any] | JSONResponse:
                 {
                     party
                     for tx in transactions
-                    for party in (tx.get("from"), tx.get("to"))
+                    for party in (tx.get("from_id", tx.get("from")), tx.get("to_id", tx.get("to")))
                     if party and party != "mint"
                 }
             )
diff --git a/web/backend/tests/test_backend.py b/web/backend/tests/test_backend.py
index 89de7c4..c057753 100644
--- a/web/backend/tests/test_backend.py
+++ b/web/backend/tests/test_backend.py
@@ -101,7 +101,7 @@ def _ok_transport(request: httpx.Request) -> httpx.Response:
                     "transactions": [
                         {
                             "ts": "2026-07-02T09:00:00Z",
-                            "from": "mint",
+                            "from_id": "mint",
                             "to": "m2bd",
                             "amount": 50,
                             "reason": "grant",
@@ -116,8 +116,8 @@ def _ok_transport(request: httpx.Request) -> httpx.Response:
                 200,
                 json={
                     "transactions": [
-                        {"from": "mint", "to": "m2bd", "amount": 50},
-                        {"from": "m2bd", "to": "platform", "amount": 8},
+                        {"from_id": "mint", "to_id": "m2bd", "amount": 50},
+                        {"from_id": "m2bd", "to_id": "platform", "amount": 8},
                     ]
                 },
             )
@@ -187,7 +187,7 @@ def test_catalog_wallet_economy_governance_happy_paths(
     assert wallet.json()["balance"] == 42
     assert wallet.json()["transactions"][0] == {
         "ts": "2026-07-02T09:00:00Z",
-        "from": "mint",
+        "from_id": "mint",
         "to": "m2bd",
         "amount": 50,
         "reason": "grant",