Issue 2 settlement early exit

src/app/api/commitments/[id]/early-exit/route.ts

@@ -52,13 +52,12 @@
 import { EarlyExitRequestBodySchema } from '@/lib/schemas/apiContracts';
 import { earlyExitCommitmentOnChain, getCommitmentFromChain } from '@/lib/backend/services/contracts';
 import {
-  earlyExitCommitmentOnChain,
-  getCommitmentFromChain,
-} from '@/lib/backend/services/contracts';
-import type { TransactionMetadata, TransactionType } from '@/lib/transaction/transactionTypes';
-import { TRANSACTION_BOUNDS, createTransactionError } from '@/lib/transaction/transactionTypes';
-import { TransactionStateMachine } from '@/lib/transaction/transactionStateMachine';
-import { validateTransactionMetadata } from '@/lib/transaction/transactionStateMachine';
+  verifyOwnership,
+  verifySessionConsistency,
+  verifyCanEarlyExit,
+  validateTransactionResponse,
+} from '@/lib/backend/transactionValidation';
+import { randomUUID } from 'crypto';
 
 const COMMITMENT_EARLY_EXIT_CORS_POLICY = {
   POST: { access: 'first-party' },
@@ -255,9 +254,9 @@
       }
       throw error;
     }
   },
   { cors: COMMITMENT_EARLY_EXIT_CORS_POLICY },
 );
 
     const { reason, callerAddress } = parseResult.data;
     const commitmentId = params.id;
@@ -359,7 +358,7 @@
     );
 
     return ok(responseData, undefined, 200, correlationId);
   } catch (error) {
     // Clean up idempotency record on failure to allow retry
     const idempotencyKey = req.headers.get('idempotency-key');
     if (idempotencyKey) {
@@ -375,7 +374,7 @@
 
     throw error;
   }
 }, { cors: COMMITMENT_EARLY_EXIT_CORS_POLICY });
 
 const _405 = methodNotAllowed(["POST"]);
 export { _405 as GET, _405 as PUT, _405 as PATCH, _405 as DELETE };