fix: handle DriverAdapterError for transaction write conflict retries

With Prisma 7's PrismaPg driver adapter, write conflicts (PostgreSQL 40001)
surface as DriverAdapterError with message 'TransactionWriteConflict' instead
of PrismaClientKnownRequestError with code P2034. Without this fix, the
$transaction retry logic silently stops retrying on serialization failures.

Added isDriverAdapterTransactionWriteConflict() check to isPrismaRetriableError()
and updated $transaction catch block to use the unified retriable check.

Co-Authored-By: Eric Allam <eallam@icloud.com>

Author: devin-ai-integration[bot]

internal-packages/database/src/transaction.ts

@@ -37,7 +37,23 @@ export function isPrismaKnownError(error: unknown): error is PrismaClientKnownRe
 */
 const retryCodes = ["P2024", "P2028", "P2034"];
 
+/**
+ * With Prisma 7's driver adapter (PrismaPg), write conflicts (PostgreSQL 40001)
+ * surface as a DriverAdapterError with message "TransactionWriteConflict" instead
+ * of a PrismaClientKnownRequestError with code P2034. This function detects that
+ * error so the retry logic still works.
+ */
+function isDriverAdapterTransactionWriteConflict(error: unknown): boolean {
+  if (typeof error !== "object" || error === null) return false;
+  const err = error as { name?: string; message?: string };
+  return err.name === "DriverAdapterError" && err.message === "TransactionWriteConflict";
+}
+
 export function isPrismaRetriableError(error: unknown): boolean {
+  if (isDriverAdapterTransactionWriteConflict(error)) {
+    return true;
+  }
+
   if (!isPrismaKnownError(error)) {
     return false;
   }
@@ -90,15 +106,16 @@ export async function $transaction<R>(
   try {
     return await (prisma as PrismaClient).$transaction(fn, options);
   } catch (error) {
-    if (isPrismaKnownError(error)) {
-      if (
-        retryCodes.includes(error.code) &&
-        typeof options?.maxRetries === "number" &&
-        attempt < options.maxRetries
-      ) {
-        return $transaction(prisma, fn, prismaError, options, attempt + 1);
-      }
+    // With Prisma 7 driver adapters, write conflicts (PG 40001) surface as
+    // DriverAdapterError instead of PrismaClientKnownRequestError P2034.
+    // Check for both error shapes so retries work correctly.
+    const retriable = isPrismaRetriableError(error);
+
+    if (retriable && typeof options?.maxRetries === "number" && attempt < options.maxRetries) {
+      return $transaction(prisma, fn, prismaError, options, attempt + 1);
+    }
 
+    if (isPrismaKnownError(error)) {
       prismaError(error);
 
       if (options?.swallowPrismaErrors) {