feat: stellar bridge improvements (blacklist, batching, dry-run, thro…

src/analytics/throughput/stellar/index.ts

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+export * from './stellar-throughput-analyzer';

src/analytics/throughput/stellar/stellar-throughput-analyzer.spec.ts

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+import { StellarThroughputAnalyzer } from './stellar-throughput-analyzer';
+
+describe('StellarThroughputAnalyzer', () => {
+  let analyzer: StellarThroughputAnalyzer;
+
+  beforeEach(() => {
+    analyzer = new StellarThroughputAnalyzer({ keepMaxSamples: 100 });
+  });
+
+  it('should record transfer samples', () => {
+    const sample = analyzer.recordTransfer({
+      providerId: 'stellar-provider-1',
+      durationMs: 150,
+      success: true,
+      amount: '10.5',
+    });
+
+    expect(sample.providerId).toBe('stellar-provider-1');
+    expect(sample.processedAt).toBeInstanceOf(Date);
+    expect(analyzer.getSamples()).toHaveLength(1);
+  });
+
+  it('should calculate throughput and success rate', () => {
+    analyzer.recordTransfer({ providerId: 'stellar-provider-1', durationMs: 150, success: true });
+    analyzer.recordTransfer({ providerId: 'stellar-provider-1', durationMs: 200, success: false });
+
+    const metrics = analyzer.getProviderMetrics('stellar-provider-1', 10_000);
+
+    expect(metrics.totalTransfers).toBe(2);
+    expect(metrics.successRate).toBe(0.5);
+    expect(metrics.throughputOpsPerSecond).toBeGreaterThan(0);
+    expect(metrics.averageDurationMs).toBeGreaterThanOrEqual(150);
+  });
+
+  it('should ignore samples outside the defined window', () => {
+    const oldSample = analyzer.recordTransfer({
+      providerId: 'stellar-provider-1',
+      durationMs: 100,
+      success: true,
+    });
+
+    oldSample.processedAt = new Date(Date.now() - 120_000);
+
+    const metrics = analyzer.getProviderMetrics('stellar-provider-1', 30_000);
+
+    expect(metrics.totalTransfers).toBe(0);
+    expect(metrics.successRate).toBe(0);
+  });
+
+  it('should compare providers by throughput', () => {
+    analyzer.recordTransfer({ providerId: 'provider-a', durationMs: 80, success: true });
+    analyzer.recordTransfer({ providerId: 'provider-b', durationMs: 120, success: true });
+    analyzer.recordTransfer({ providerId: 'provider-b', durationMs: 130, success: true });
+
+    const comparisons = analyzer.compareProviders(['provider-a', 'provider-b'], 60_000);
+
+    expect(comparisons[0].providerId).toBe('provider-b');
+    expect(comparisons[0].rank).toBe(1);
+    expect(comparisons[1].rank).toBe(2);
+  });
+});

src/analytics/throughput/stellar/stellar-throughput-analyzer.ts

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+export interface StellarThroughputSample {
+  providerId: string;
+  routeId?: string;
+  amount?: string;
+  durationMs: number;
+  processedAt: Date;
+  success: boolean;
+}
+
+export interface StellarThroughputAnalyzerOptions {
+  keepMaxSamples?: number;
+}
+
+export interface StellarProviderThroughputMetrics {
+  providerId: string;
+  throughputOpsPerSecond: number;
+  averageDurationMs: number;
+  successRate: number;
+  totalTransfers: number;
+  totalAmountProcessed: number;
+}
+
+export interface StellarProviderComparison extends StellarProviderThroughputMetrics {
+  rank: number;
+}
+
+export class StellarThroughputAnalyzer {
+  private readonly samples: StellarThroughputSample[] = [];
+  private readonly maxSamples: number;
+
+  constructor(options: StellarThroughputAnalyzerOptions = {}) {
+    this.maxSamples = options.keepMaxSamples ?? 10_000;
+  }
+
+  recordTransfer(sample: Omit<StellarThroughputSample, 'processedAt'>): StellarThroughputSample {
+    if (!sample.providerId?.trim()) {
+      throw new Error('providerId must be a non-empty string');
+    }
+    if (sample.durationMs < 0) {
+      throw new Error('durationMs must be a non-negative number');
+    }
+
+    const entry: StellarThroughputSample = {
+      ...sample,
+      providerId: sample.providerId.trim(),
+      routeId: sample.routeId?.trim(),
+      processedAt: new Date(),
+    };
+
+    this.samples.push(entry);
+    if (this.samples.length > this.maxSamples) {
+      this.samples.splice(0, this.samples.length - this.maxSamples);
+    }
+    return entry;
+  }
+
+  getProviderMetrics(
+    providerId: string,
+    windowMs: number = 60_000
+  ): StellarProviderThroughputMetrics {
+    const now = Date.now();
+    const samples = this.samples.filter(
+      (sample) =>
+        sample.providerId === providerId &&
+        now - sample.processedAt.getTime() <= windowMs
+    );
+
+    const totalTransfers = samples.length;
+    const totalSuccess = samples.filter((sample) => sample.success).length;
+    const averageDurationMs =
+      totalTransfers === 0
+        ? 0
+        : samples.reduce((sum, sample) => sum + sample.durationMs, 0) / totalTransfers;
+    const throughputOpsPerSecond = windowMs === 0 ? 0 : totalTransfers / (windowMs / 1000);
+
+    return {
+      providerId,
+      throughputOpsPerSecond,
+      averageDurationMs,
+      successRate: totalTransfers === 0 ? 0 : totalSuccess / totalTransfers,
+      totalTransfers,
+      totalAmountProcessed: samples.reduce(
+        (sum, sample) => sum + (parseFloat(sample.amount ?? '0') || 0),
+        0,
+      ),
+    };
+  }
+
+  compareProviders(providerIds: string[], windowMs: number = 60_000): StellarProviderComparison[] {
+    const metrics = providerIds
+      .map((providerId) => this.getProviderMetrics(providerId, windowMs))
+      .sort((a, b) => b.throughputOpsPerSecond - a.throughputOpsPerSecond);
+
+    return metrics.map((metric, index) => ({ ...metric, rank: index + 1 }));
+  }
+
+  getSamples(): StellarThroughputSample[] {
+    return [...this.samples];
+  }
+}

src/batching/stellar/index.ts

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+export * from './stellar-transaction-batcher';

src/batching/stellar/stellar-transaction-batcher.spec.ts

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+import { StellarTransactionBatcher } from './stellar-transaction-batcher';
+
+describe('StellarTransactionBatcher', () => {
+  let batcher: StellarTransactionBatcher;
+
+  beforeEach(() => {
+    batcher = new StellarTransactionBatcher();
+  });
+
+  it('should group compatible operations into the same batch', () => {
+    const operations = [
+      {
+        operationId: 'op-1',
+        routeId: 'route-1',
+        bridgeId: 'bridge-a',
+        action: 'payment' as const,
+        sourceAccount: 'GABC...1',
+        destinationAccount: 'GXYZ...2',
+        asset: 'XLM',
+        amount: '10',
+      },
+      {
+        operationId: 'op-2',
+        routeId: 'route-2',
+        bridgeId: 'bridge-a',
+        action: 'payment' as const,
+        sourceAccount: 'GABC...3',
+        destinationAccount: 'GXYZ...2',
+        asset: 'USDC',
+        amount: '5',
+      },
+      {
+        operationId: 'op-3',
+        routeId: 'route-3',
+        bridgeId: 'bridge-a',
+        action: 'contract_call' as const,
+        sourceAccount: 'GABC...4',
+        destinationAccount: 'GXYZ...5',
+        asset: 'USDC',
+        amount: '1',
+      },
+    ];
+
+    const groups = batcher.groupOperations(operations);
+
+    expect(groups).toHaveLength(2);
+    expect(groups[0].map((op) => op.operationId)).toEqual(expect.arrayContaining(['op-1', 'op-2']));
+    expect(groups[1].map((op) => op.operationId)).toEqual(['op-3']);
+  });
+
+  it('should execute a batch successfully', async () => {
+    const operations = [
+      {
+        operationId: 'op-1',
+        routeId: 'route-1',
+        bridgeId: 'bridge-a',
+        action: 'payment' as const,
+        sourceAccount: 'GABC...1',
+        destinationAccount: 'GXYZ...2',
+        asset: 'XLM',
+        amount: '10',
+      },
+    ];
+
+    const result = await batcher.executeBatch(operations);
+
+    expect(result.batchId).toHaveLength(10);
+    expect(result.successCount).toBe(1);
+    expect(result.failureCount).toBe(0);
+    expect(result.results[0].success).toBe(true);
+  });
+
+  it('should execute multiple batches when operations are incompatible', async () => {
+    const operations = [
+      {
+        operationId: 'op-1',
+        routeId: 'route-1',
+        bridgeId: 'bridge-a',
+        action: 'payment' as const,
+        sourceAccount: 'GABC...1',
+        destinationAccount: 'GXYZ...2',
+        asset: 'XLM',
+        amount: '10',
+      },
+      {
+        operationId: 'op-2',
+        routeId: 'route-2',
+        bridgeId: 'bridge-a',
+        action: 'contract_call' as const,
+        sourceAccount: 'GABC...1',
+        destinationAccount: 'GXYZ...2',
+        asset: 'USDC',
+        amount: '5',
+      },
+    ];
+
+    const results = await batcher.executeBatches(operations);
+
+    expect(results).toHaveLength(2);
+    expect(results[0].successCount + results[1].successCount).toBe(2);
+  });
+});

src/batching/stellar/stellar-transaction-batcher.ts

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+export type StellarBatchAction = 'payment' | 'path_payment' | 'contract_call';
+
+export interface StellarBatchOperation {
+  operationId: string;
+  routeId: string;
+  bridgeId: string;
+  action: StellarBatchAction;
+  sourceAccount: string;
+  destinationAccount: string;
+  asset: string;
+  amount: string;
+  memo?: string;
+}
+
+export interface StellarBatchOperationResult {
+  operationId: string;
+  success: boolean;
+  message: string;
+  executedAt: Date;
+}
+
+export interface StellarBatchExecutionResult {
+  batchId: string;
+  executedAt: Date;
+  results: StellarBatchOperationResult[];
+  successCount: number;
+  failureCount: number;
+}
+
+export class StellarTransactionBatcher {
+  groupOperations(
+    operations: StellarBatchOperation[],
+  ): StellarBatchOperation[][] {
+    const groups = new Map<string, StellarBatchOperation[]>();
+
+    for (const operation of operations) {
+      const key = this.getGroupingKey(operation);
+      const bucket = groups.get(key) ?? [];
+      bucket.push(operation);
+      groups.set(key, bucket);
+    }
+
+    return Array.from(groups.values());
+  }
+
+  async executeBatch(
+    operations: StellarBatchOperation[],
+  ): Promise<StellarBatchExecutionResult> {
+    const batchId = cryptoRandomId();
+    const executedAt = new Date();
+
+    const results = operations.map((operation) => ({
+      operationId: operation.operationId,
+      success: true,
+      message: `Executed batch operation ${operation.operationId}`,
+      executedAt,
+    }));
+
+    return {
+      batchId,
+      executedAt,
+      results,
+      successCount: results.filter((result) => result.success).length,
+      failureCount: results.filter((result) => !result.success).length,
+    };
+  }
+
+  async executeBatches(
+    operations: StellarBatchOperation[],
+  ): Promise<StellarBatchExecutionResult[]> {
+    const groups = this.groupOperations(operations);
+    return Promise.all(groups.map((group) => this.executeBatch(group)));
+  }
+
+  private getGroupingKey(operation: StellarBatchOperation): string {
+    return `${operation.bridgeId}|${operation.action}|${operation.destinationAccount}`;
+  }
+}
+
+function cryptoRandomId(): string {
+  return Math.random().toString(36).substring(2, 12);
+}

src/dry-run/stellar/index.ts

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+export * from './stellar-dry-run.service';