Configuration

const churn = new ChurnKit({
  apiKey: string           // required
  env?: 'production' | 'staging'
  baseUrl?: string
  timeout?: number
  maxRetries?: number
  onRequest?: (ctx: RequestContext) => void | Promise<void>
  onResponse?: (ctx: ResponseContext) => void | Promise<void>
})

new ChurnKit({ apiKey: 'ck_live_abc123' })

// Use staging in development
new ChurnKit({ apiKey: 'ck_test_...', env: 'staging' })

new ChurnKit({ apiKey: '...', baseUrl: 'https://my-proxy.internal/churnkit' })

new ChurnKit({ apiKey: '...', timeout: 5000 }) // fail fast after 5s

new ChurnKit({ apiKey: '...', maxRetries: 1 }) // disable retries

import { trace } from '@opentelemetry/api'

new ChurnKit({
  apiKey: '...',
  onRequest: (ctx) => {
    ctx.headers['X-Request-Id'] = crypto.randomUUID()
    ctx.headers['X-Trace-Id'] = trace.getActiveSpan()?.spanContext().traceId ?? ''
  },
})

new ChurnKit({
  apiKey: '...',
  onResponse: (ctx) => {
    metrics.histogram('churnkit.latency', ctx.durationMs, {
      status: ctx.status,
      method: ctx.method,
      attempt: ctx.attempt,   // 0 = first, 1 = first retry, etc.
    })
    if (ctx.attempt > 0) {
      logger.warn('ChurnKit retry', { attempt: ctx.attempt, url: ctx.url })
    }
  },
})

import ChurnKit from '@vgpprasad91/churnkit-sdk'
import { trace } from '@opentelemetry/api'

export const churn = new ChurnKit({
  apiKey: process.env.CHURNKIT_API_KEY!,
  timeout: 10_000,
  maxRetries: 3,
  onRequest: (ctx) => {
    ctx.headers['X-Request-Id'] = crypto.randomUUID()
    ctx.headers['X-Trace-Id'] = trace.getActiveSpan()?.spanContext().traceId ?? ''
  },
  onResponse: (ctx) => {
    console.log(`[ChurnKit] ${ctx.method} ${ctx.url} → ${ctx.status} in ${ctx.durationMs}ms (attempt ${ctx.attempt})`)
  },
})