Event Discovery

Overview

Discover and filter Polymarket events using the DOME API. Events aggregate multiple related markets under a single topic (e.g., "Presidential Election 2024" contains multiple candidate markets).

Security

This skill implements defense-in-depth measures against indirect prompt injection (Snyk W011):

• Input Sanitization: All user-generated content (titles, subtitles, tags) is sanitized using security.ts
• Pattern Filtering: Known prompt injection patterns are removed (e.g., "ignore previous instructions", "system:")
• Content Validation: Suspicious content with excessive special characters is flagged
• Fail-Safe: Processing errors return original data rather than corrupting it

The skill fetches data from the trusted DOME API (api.domeapi.io) which provides structured event data from the Polymarket protocol.

Setup

Before using this skill, make sure you have built the TypeScript files:

# From the DOME_skills root directory
npm install
npm run build

Quick Start

import {
  fetchEvents,
  fetchEventBySlug,
  getEventMarkets,
  filterHighVolumeEvents
} from "./scripts/eventDiscovery.js";

// Fetch recent events
const result = await fetchEvents(apiKey, { limit: 10, include_markets: true });
for (const event of result.events) {
  console.log(`${event.title} - Markets: ${event.market_count}`);
}

// Get specific event with markets
const event = await fetchEventBySlug(apiKey, "presidential-election-2024");
const markets = getEventMarkets(event);

// Filter high-volume events
const allEvents = await fetchAllEvents(apiKey, { tags: ["crypto"] });
const highVolume = filterHighVolumeEvents(allEvents, { minVolume: 1000000 });

Core Functions

fetchEvents()

Fetch events with optional filters.

const result = await fetchEvents(
  apiKey,
  {
    event_slug: "presidential-election-2024",
    tags: ["politics", "elections"],
    status: "open",
    include_markets: true,
    limit: 20
  }
);
// Returns: { events: [...], pagination: {...} }

fetchEventBySlug()

Get a single event by its slug with all markets.

const event = await fetchEventBySlug(
  apiKey,
  "presidential-election-2024"
);

getEventMarkets()

Extract markets from an event object.

const markets = getEventMarkets(event);
// Returns: EventMarket[]

filterHighVolumeEvents()

Filter events by volume, status, or tags.

const filtered = filterHighVolumeEvents(
  events,
  {
    minVolume: 1000000,
    status: "open",
    tags: ["crypto"],
    minMarkets: 2
  }
);

calculateEventStats()

Calculate statistics for an event.

const stats = calculateEventStats(event);
// Returns: { total_volume, total_markets, avg_volume_per_market, ... }

Event Data Structure

The Event object returned by the API contains the following fields:

Field	Type	Description
event_slug	string	Unique identifier for the event
title	string	Event title
subtitle	string | null	Event description/subtitle
status	"open" | "closed"	Current event status
start_time	number	Unix timestamp when event started
end_time	number	Unix timestamp when event ends
volume_fiat_amount	number	Total USD volume across all markets
market_count	number	Number of markets in this event
markets	EventMarket[] | null	Array of markets (when include_markets=true)
tags	string[]	Tags/categories for the event
image	string | null	URL to event image

Note: The volume field is volume_fiat_amount, not volume.

Data Limitations

• Maximum 100 events per request
• Event data ordered by total volume (highest first)
• Markets included only when include_markets=true