Function verifyDurableIteratorToken

packages/durable-iterator/src/schemas.ts:27–45

(secret: string, token: string)

 * Verifies a token and returns the payload if valid.
 */
export async function verifyDurableIteratorToken(secret: string, token: string): Promise<DurableIteratorTokenPayload | undefined> {
  try {
    const payload = parseEmptyableJSON(await unsign(token, secret))

    if (!v.is(DurableIteratorTokenPayloadSchema, payload)) {
      return undefined
    }

    if (payload.exp < (Date.now() / 1000)) {
      return undefined
    }

    return payload
  }
  catch {
    // parseEmptyableJSON can throw error if the token contains invalid json
    return undefined
  }
}

/**
 * Extracts the payload from a token without verifying its signature.