TwilioProvider (twilio.ts)

Provides Twilio voice call integration handling outbound/inbound calls, webhook verification, TwiML responses, and call status normalization for telephony applications.

// Source: https://github.com/TristanBrotherton/openclaw-voice-call-realtime | License: MIT | Copyright 2026 OpenClaw Foundation (original voice-call plugin)
// Provided via justclaw.it.com; keep this notice with the code.
import crypto from "node:crypto";
import type { TwilioConfig, WebhookSecurityConfig } from "../config.js";
import { getHeader } from "../http-headers.js";
import type { MediaStreamHandler } from "../media-stream.js";
import { chunkAudio } from "../telephony-audio.js";
import type { TelephonyTtsProvider } from "../telephony-tts.js";
import type {
  GetCallStatusInput,
  GetCallStatusResult,
  HangupCallInput,
  InitiateCallInput,
  InitiateCallResult,
  NormalizedEvent,
  PlayTtsInput,
  ProviderWebhookParseResult,
  StartListeningInput,
  StopListeningInput,
  WebhookCon

... (truncated -- full source via MCP)