Implement A2P Payment Processor and Universal Protocol Bridge

Co-authored-by: clduab11 <185000089+clduab11@users.noreply.github.com>

Author: Copilot

src/protocols/__tests__/a2p-payment-processor.test.ts

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+/**
+ * A2P Payment Processor Tests
+ * 
+ * Focused tests for payment processing with quantum optimization and Byzantine consensus
+ */
+
+import { A2PPaymentProcessor } from "../a2a/a2p/payment-processor.js";
+import { PaymentMandate, A2PConfig } from "../../types/a2a.js";
+import { Logger } from "../../utils/logger.js";
+
+// Mock Logger to avoid console output during tests
+jest.mock("../../utils/logger.js", () => ({
+  Logger: jest.fn().mockImplementation(() => ({
+    info: jest.fn(),
+    debug: jest.fn(),
+    warn: jest.fn(),
+    error: jest.fn(),
+  })),
+}));
+
+describe('A2PPaymentProcessor', () => {
+  let processor: A2PPaymentProcessor;
+  let mockConfig: A2PConfig;
+
+  beforeEach(() => {
+    mockConfig = {
+      quantum: {
+        pennylane: "mock-pennylane-service",
+        qiskit: "mock-qiskit-service",
+      },
+      database: "mock-database",
+      validators: 21,
+      faultTolerance: 0.33,
+    };
+
+    processor = new A2PPaymentProcessor(mockConfig);
+  });
+
+  describe('Payment Processing', () => {
+    it('should process a simple payment successfully', async () => {
+      const mandate: PaymentMandate = {
+        id: "test-mandate-1",
+        amount: 100,
+        currency: "USD",
+        sender: "agent-sender",
+        receiver: "agent-receiver",
+        purpose: "test-payment",
+        timeout: 30000,
+        escrow: false,
+      };
+
+      const result = await processor.processPayment(mandate);
+
+      expect(result.status).toBe("completed");
+      expect(result.amount).toBe(100);
+      expect(result.currency).toBe("USD");
+      expect(result.transactionId).toMatch(/^tx_/);
+      expect(result.latency).toBeLessThan(500); // Must be under 500ms
+      expect(result.consensusProof).toBeTruthy();
+    });
+
+    it('should process payment with escrow', async () => {
+      const mandate: PaymentMandate = {
+        id: "test-mandate-escrow",
+        amount: 1000,
+        currency: "USD",
+        sender: "agent-sender",
+        receiver: "agent-receiver",
+        purpose: "high-value-payment",
+        escrow: true,
+      };
+
+      const result = await processor.processPayment(mandate);
+
+      expect(result.status).toBe("completed");
+      expect(result.escrowId).toBeTruthy();
+      expect(result.escrowId).toMatch(/^escrow_/);
+    });
+
+    it('should optimize payment route with quantum algorithms', async () => {
+      const mandate: PaymentMandate = {
+        id: "test-mandate-quantum",
+        amount: 5000,
+        currency: "EUR",
+        sender: "agent-sender",
+        receiver: "agent-receiver",
+        purpose: "quantum-optimized-payment",
+        maxFee: 25, // 0.5% max fee
+      };
+
+      const result = await processor.processPayment(mandate);
+
+      expect(result.status).toBe("completed");
+      expect(result.route.quantumOptimized).toBe(true);
+      expect(result.fee).toBeLessThanOrEqual(25);
+      expect(result.route.reliability).toBeGreaterThan(0.99);
+    });
+
+    it('should handle multiple concurrent payments', async () => {
+      const mandates: PaymentMandate[] = Array.from({ length: 10 }, (_, i) => ({
+        id: `concurrent-mandate-${i}`,
+        amount: 50,
+        currency: "USD",
+        sender: `agent-sender-${i}`,
+        receiver: `agent-receiver-${i}`,
+        purpose: "concurrent-test",
+      }));
+
+      const promises = mandates.map(mandate => processor.processPayment(mandate));
+      const results = await Promise.all(promises);
+
+      results.forEach((result, index) => {
+        expect(result.status).toBe("completed");
+        expect(result.amount).toBe(50);
+        expect(result.transactionId).toMatch(/^tx_/);
+        expect(result.latency).toBeLessThan(500);
+      });
+    });
+  });
+
+  describe('Performance Requirements', () => {
+    it('should process payments within 500ms latency requirement', async () => {
+      const mandate: PaymentMandate = {
+        id: "performance-test",
+        amount: 200,
+        currency: "USD",
+        sender: "perf-sender",
+        receiver: "perf-receiver",
+        purpose: "performance-validation",
+      };
+
+      const startTime = performance.now();
+      const result = await processor.processPayment(mandate);
+      const actualLatency = performance.now() - startTime;
+
+      expect(actualLatency).toBeLessThan(500);
+      expect(result.latency).toBeLessThan(500);
+      expect(result.status).toBe("completed");
+    });
+
+    it('should maintain high throughput under load', async () => {
+      const mandates: PaymentMandate[] = Array.from({ length: 100 }, (_, i) => ({
+        id: `load-test-${i}`,
+        amount: 10,
+        currency: "USD",
+        sender: `load-sender-${i}`,
+        receiver: `load-receiver-${i}`,
+        purpose: "load-test",
+      }));
+
+      const startTime = performance.now();
+      const promises = mandates.map(mandate => processor.processPayment(mandate));
+      const results = await Promise.all(promises);
+      const totalTime = performance.now() - startTime;
+
+      const throughput = (results.length / totalTime) * 1000; // ops per second
+
+      expect(throughput).toBeGreaterThan(50); // Should handle at least 50 payments/sec
+      expect(results.every(result => result.status === "completed")).toBe(true);
+    });
+  });
+
+  describe('Error Handling', () => {
+    it('should handle invalid payment mandate gracefully', async () => {
+      const invalidMandate = {
+        id: "invalid-mandate",
+        amount: -100, // Invalid negative amount
+        currency: "",
+        sender: "",
+        receiver: "",
+        purpose: "",
+      } as PaymentMandate;
+
+      await expect(processor.processPayment(invalidMandate))
+        .rejects.toThrow();
+    });
+
+    it('should provide meaningful error messages', async () => {
+      const mandate: PaymentMandate = {
+        id: "error-test",
+        amount: 0, // Invalid zero amount
+        currency: "USD",
+        sender: "error-sender", 
+        receiver: "error-receiver",
+        purpose: "error-test",
+      };
+
+      try {
+        await processor.processPayment(mandate);
+        fail("Should have thrown an error");
+      } catch (error) {
+        expect(error).toBeInstanceOf(Error);
+        expect((error as Error).message).toBeTruthy();
+      }
+    });
+  });
+
+  describe('Metrics Collection', () => {
+    it('should track payment metrics correctly', async () => {
+      const mandate: PaymentMandate = {
+        id: "metrics-test",
+        amount: 150,
+        currency: "USD",
+        sender: "metrics-sender",
+        receiver: "metrics-receiver",
+        purpose: "metrics-validation",
+      };
+
+      await processor.processPayment(mandate);
+      const metrics = processor.getMetrics();
+
+      expect(metrics).toBeDefined();
+      expect(typeof metrics.totalPayments).toBe('number');
+      expect(typeof metrics.averageLatency).toBe('number');
+      expect(typeof metrics.successRate).toBe('number');
+      expect(metrics.successRate).toBeGreaterThanOrEqual(0);
+      expect(metrics.successRate).toBeLessThanOrEqual(1);
+    });
+  });
+
+  describe('Quantum Optimization', () => {
+    it('should apply quantum optimization for high-value payments', async () => {
+      const highValueMandate: PaymentMandate = {
+        id: "quantum-test",
+        amount: 10000, // High value triggers quantum optimization
+        currency: "USD",
+        sender: "quantum-sender",
+        receiver: "quantum-receiver",
+        purpose: "quantum-optimization-test",
+        maxFee: 50,
+      };
+
+      const result = await processor.processPayment(highValueMandate);
+
+      expect(result.route.quantumOptimized).toBe(true);
+      expect(result.fee).toBeLessThanOrEqual(50);
+      expect(result.route.reliability).toBeGreaterThan(0.99);
+    });
+
+    it('should fallback gracefully when quantum optimization fails', async () => {
+      // Mock quantum service failure by creating a mandate that would trigger optimization
+      const mandate: PaymentMandate = {
+        id: "quantum-fallback-test",
+        amount: 5000,
+        currency: "USD",
+        sender: "fallback-sender",
+        receiver: "fallback-receiver",
+        purpose: "quantum-fallback-test",
+        maxFee: 25,
+      };
+
+      // The payment should still succeed even if quantum optimization fails
+      const result = await processor.processPayment(mandate);
+      
+      expect(result.status).toBe("completed");
+      expect(result.amount).toBe(5000);
+    });
+  });
+
+  describe('Byzantine Consensus Integration', () => {
+    it('should validate transactions with Byzantine consensus', async () => {
+      const mandate: PaymentMandate = {
+        id: "consensus-test",
+        amount: 500,
+        currency: "USD",
+        sender: "consensus-sender",
+        receiver: "consensus-receiver",
+        purpose: "consensus-validation",
+      };
+
+      const result = await processor.processPayment(mandate);
+
+      expect(result.consensusProof).toBeTruthy();
+      expect(result.consensusProof).toMatch(/^consensus_/);
+      expect(result.status).toBe("completed");
+    });
+  });
+});