fix stroops conversion in creditline client amount encoding

src/stellar/contracts/clients/creditline.client.ts

@@ -109,6 +109,6 @@ export class CreditLineContractClient {
   }
 
   private toContractAmount(value: number): bigint {
-    return BigInt(Math.round(value * 100));
+    return BigInt(Math.round(value * 10_000_000));
   }
 }

test/unit/stellar/contracts/clients/creditline.client.spec.ts

@@ -0,0 +1,67 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { ConfigService } from '@nestjs/config';
+import { CreditLineContractClient } from '../../../../../src/stellar/contracts/clients/creditline.client';
+import { SorobanService } from '../../../../../src/blockchain/soroban/soroban.service';
+import { CREDIT_LINE_CONTRACT_ID_KEY } from '../../../../../src/stellar/contracts/interfaces/creditline.interface';
+
+describe('CreditLineContractClient', () => {
+  let client: CreditLineContractClient;
+
+  const mockSorobanService = {
+    getServer: jest.fn(),
+    getNetworkPassphrase: jest.fn().mockReturnValue('Test SDF Network ; September 2015'),
+  };
+
+  const mockConfigService = {
+    get: jest.fn((key: string) => {
+      if (key === CREDIT_LINE_CONTRACT_ID_KEY || key === 'CREDITLINE_CONTRACT_ID') {
+        return 'CDLZFC3SYJYDZT7K3VJ4STDQ2G6FJFY5ODV2S4W3C5KQ5Y2V3K4X5Y6Z';
+      }
+      return undefined;
+    }),
+  };
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        CreditLineContractClient,
+        { provide: SorobanService, useValue: mockSorobanService },
+        { provide: ConfigService, useValue: mockConfigService },
+      ],
+    }).compile();
+
+    client = module.get<CreditLineContractClient>(CreditLineContractClient);
+  });
+
+  describe('toContractAmount', () => {
+    it('converts $1,000.00 to 10,000,000,000 stroops', () => {
+      const result = (client as any).toContractAmount(1000);
+      expect(result).toBe(10_000_000_000n);
+    });
+
+    it('converts $0.00 to 0 stroops', () => {
+      const result = (client as any).toContractAmount(0);
+      expect(result).toBe(0n);
+    });
+
+    it('converts $1.00 to 10,000,000 stroops', () => {
+      const result = (client as any).toContractAmount(1);
+      expect(result).toBe(10_000_000n);
+    });
+
+    it('converts $0.50 to 5,000,000 stroops', () => {
+      const result = (client as any).toContractAmount(0.5);
+      expect(result).toBe(5_000_000n);
+    });
+
+    it('converts $0.01 to 100,000 stroops', () => {
+      const result = (client as any).toContractAmount(0.01);
+      expect(result).toBe(100_000n);
+    });
+
+    it('rounds to nearest stroop', () => {
+      const result = (client as any).toContractAmount(0.12345678);
+      expect(result).toBe(1_234_568n);
+    });
+  });
+});