fix: send full repayment amount instead of one-tenth in buildUnsigned…

backend/.prettierrc

@@ -6,5 +6,5 @@
   "singleQuote": true,
   "trailingComma": "all",
   "arrowParens": "always",
-  "endOfLine": "lf"
+  "endOfLine": "auto"
 }

backend/src/middleware/pauseGuard.ts

@@ -76,9 +76,11 @@ export function pauseGuard(req: Request, _res: Response, next: NextFunction): vo
     });
 
     // Return 503 Service Unavailable with pause info
-    throw AppError.serviceUnavailable(
+    throw new AppError(
       `Contract operations are temporarily paused. Reason: ${globalPauseState.reason || 'Maintenance or security measure'}. ` +
         `Affected contracts: ${globalPauseState.contracts.join(', ')}`,
+      503,
+      true,
     );
   }
 

frontend/src/app/utils/soroban.test.ts

@@ -0,0 +1,59 @@
+import { TextDecoder, TextEncoder } from "util";
+
+if (typeof global.TextEncoder === "undefined") {
+  (global as any).TextEncoder = TextEncoder;
+}
+if (typeof global.TextDecoder === "undefined") {
+  (global as any).TextDecoder = TextDecoder;
+}
+
+/* eslint-disable @typescript-eslint/no-require-imports */
+const {
+  Account,
+  Keypair,
+  rpc,
+  scValToNative,
+  TransactionBuilder,
+} = require("@stellar/stellar-sdk");
+const { buildUnsignedRepaymentXdr } = require("./soroban");
+
+describe("buildUnsignedRepaymentXdr", () => {
+  const borrower = Keypair.random().publicKey();
+  const contractId = Keypair.random().publicKey();
+
+  beforeEach(() => {
+    jest.spyOn(rpc.Server.prototype, "getAccount").mockResolvedValue(new Account(borrower, "100"));
+  });
+
+  afterEach(() => {
+    jest.restoreAllMocks();
+  });
+
+  it("encodes the full repayment amount into the XDR, not a tenth of it", async () => {
+    const inputAmount = 1000;
+    const loanId = "42";
+
+    const xdrString = await buildUnsignedRepaymentXdr({
+      borrower,
+      loanId,
+      amount: inputAmount,
+      contractId,
+    });
+
+    const tx = TransactionBuilder.fromXDR(xdrString, "Test SDF Network ; September 2015");
+
+    const op = tx.operations[0];
+    expect(op.type).toBe("invokeHostFunction");
+
+    if (op.type === "invokeHostFunction") {
+      const invokeArgs = op.func.invokeContract();
+      const args = invokeArgs.args();
+      const loanIdVal = scValToNative(args[1]);
+      const amountVal = scValToNative(args[2]);
+
+      expect(loanIdVal).toBe(BigInt(loanId));
+      expect(amountVal).toBe(BigInt(inputAmount));
+      expect(amountVal).not.toBe(BigInt(inputAmount / 10));
+    }
+  });
+});

frontend/src/app/utils/soroban.ts

@@ -81,7 +81,7 @@ export async function buildUnsignedRepaymentXdr({
 
   const borrowerScVal = new Address(borrower).toScVal();
   const loanIdScVal = nativeToScVal(BigInt(loanId), { type: "u64" });
-  const amountScVal = nativeToScVal(BigInt(Math.floor(amount / 10)), { type: "i128" });
+  const amountScVal = nativeToScVal(BigInt(Math.floor(amount)), { type: "i128" });
 
   const tx = new TransactionBuilder(source, {
     fee: "10000",