sh-mcp/servers/sh-mcp-finance/src/app.ts

/**
 * sh-mcp-finance application assembly.
 *
 * Same shared host as ops, but the registry holds finance-tier tools — so every
 * call is audited and redacted on egress by the shared dispatcher (design.md
 * §2.5, §7.3). Exported separately from `index.ts` for tests.
 */

import {
  ConsoleAuditLogger,
  InMemoryRateLimiter,
  createApp,
  type DispatchDeps,
} from '@sh-mcp/shared';
import type { Express } from 'express';

import { buildFinanceRegistry } from './registry.js';
import { buildFinanceAuthProvider } from './auth.js';
import { loadFinanceConfig, type FinanceConfig } from './config.js';

export interface BuildAppResult {
  app: Express;
  config: FinanceConfig;
}

export function buildFinanceApp(configOverride?: FinanceConfig): BuildAppResult {
  const config = configOverride ?? loadFinanceConfig();
  const registry = buildFinanceRegistry(config);
  const authProvider = buildFinanceAuthProvider(config);

  const deps: DispatchDeps = {
    auditLogger: new ConsoleAuditLogger(),
    // Finance is read-only and lower-volume; cap tighter than ops.
    rateLimiter: new InMemoryRateLimiter({
      sessionCap: 100,
      perToolLimit: 30,
      windowMs: 60_000,
    }),
  };

  const app = createApp({
    registry,
    authProvider,
    deps,
    mcpInfo: { name: 'sh-mcp-finance', version: '0.1.0' },
    openApi: {
      info: {
        title: 'Sea Haven MCP — Finance',
        version: '0.1.0',
        description: 'Finance-tier tools (sensitive, read-only, audited). design.md §3.',
      },
      servers: [{ url: `http://localhost:${config.port}`, description: 'local' }],
    },
  });

  return { app, config };
}