The Open-Source Alternative to DomeAPI

Automatic codemod to migrate DomeAPI code to pmxt. Supports both TypeScript/JavaScript and Python.

Why?

DomeAPI is being sunset. This tool helps you automatically migrate your codebase to pmxt, which supports both Polymarket and Kalshi with a unified API.

Installation

npm install -g dome-to-pmxt
# or
npx dome-to-pmxt

Usage

# Transform a single file
dome-to-pmxt ./src/my-file.ts

# Transform a directory (recursively)
dome-to-pmxt ./src

# Transform both TS and Python files in a project
dome-to-pmxt ./

Supported file types:

• TypeScript/JavaScript: .ts, .tsx, .js, .jsx, .mjs, .cjs
• Python: .py

Skipped directories:

node_modules, .git, dist, build, __pycache__, .venv, venv, .next, coverage

What it migrates

TypeScript/JavaScript

• Import statements: @dome-api/sdk → pmxtjs
• Constructor: new DomeClient({...}) → new pmxt.Polymarket()
• Methods: dome.polymarket.markets.getMarkets() → poly.fetchMarkets()
• Parameters: pagination_key → offset, token_id → outcomeId, status: 'open' → status: 'active'
• Timestamps: start_ts, end_ts → start, end (with TODOs for manual adjustment)

Python

Same transforms for Python imports and method calls.

What needs manual work

The codemod adds /* TODO(dome-to-pmxt): ... */ comments (JS) or # TODO(dome-to-pmxt): ... (Python) where semantic changes require manual review:

1. Response shapes differ — DomeAPI wraps markets in {markets: [...]}, pmxt returns arrays directly
2. Price extraction — DomeAPI has getMarketPrice() returning a price object; pmxt prices are in market.outcomes[i].price
3. Pagination — DomeAPI uses cursor-based (pagination_key), pmxt uses offset-based (offset)
4. Timestamp handling — DomeAPI expects unix seconds, pmxt expects Date objects

See ../../docs/MIGRATE_FROM_DOMEAPI.md for detailed migration guide and examples.

Example

Before (DomeAPI):

import { DomeClient } from '@dome-api/sdk';

const dome = new DomeClient({ apiKey: 'your-key' });

async function main() {
  const markets = await dome.polymarket.markets.getMarkets({
    status: 'open',
    limit: 10
  });
  console.log(markets.markets.length);
}

After running codemod:

import pmxt from 'pmxtjs';

const dome = /* TODO(dome-to-pmxt): new pmxt.Polymarket() or new pmxt.Kalshi() */ new pmxt.Polymarket();

async function main() {
  const markets = await poly.fetchMarkets({
    status: 'active',
    limit: 10
  });
  console.log(markets.length); // TODO: pmxt returns array directly
}

Limitations

• The codemod handles common patterns but may miss edge cases
• Always review the transformed code and search for TODO(dome-to-pmxt) comments
• Test thoroughly against your actual API calls
• For complex migrations, refer to the full migration guide

Next steps

1. Run the codemod on your project
2. Search for TODO(dome-to-pmxt) comments and fix them
3. Install pmxt: npm install pmxtjs (or pip install pmxt)
4. Update your code to handle the new API shapes and authentication (pmxt handles auth via environment variables)
5. Test with real API calls

License

MIT