# Polygon Bridge

rotki decodes Polygon PoS bridge deposits and withdrawals between Ethereum and Polygon, and the MATIC-to-POL token migration. Source and destination legs are linked so bridged assets are not double-counted. For Polygon PoS chain balances see the [Polygon PoS](/integrations/polygon-pos) integration. You choose which RPC endpoint handles the queries.

## Features

- Polygon PoS bridge deposits and withdrawals decoded as protocol events, including the Exit NFT used to complete a withdrawal.
- Source-chain (Ethereum) and destination-chain (Polygon) legs linked to avoid double-counting.
- MATIC-to-POL token migration decoded.

## Setup

1. In rotki, add your address on both Ethereum and Polygon PoS.
2. Open History and let the initial sync run. Bridge and migration events are decoded automatically.

## FAQ

### How is this different from the Polygon PoS integration?

The Polygon PoS integration tracks balances and activity on the Polygon chain itself. This page covers the Ethereum-side Polygon mechanisms: the PoS bridge transfers and the MATIC-to-POL migration.

### Which RPC does rotki use for these events?

rotki is a local application that talks directly to the RPC endpoint you configure for each chain - the public default, a third-party provider, or your own node. Each query goes from your computer to that endpoint without passing through any rotki-operated server.