Polygon Bridge moves tokens through lock, mint and claim steps

Polygon Bridge moves tokens between Ethereum and Polygon PoS by locking or burning them on one chain, then releasing the matching asset on the other. The transfer begins with a transaction on the chain where the tokens currently sit. The bridge then records that action so the matching asset can be made available on the destination chain.

How does Polygon Bridge move tokens?

Polygon Bridge uses a lock-and-mint process for a transfer from Ethereum to Polygon PoS. The tokens are locked on Ethereum, and an equivalent amount of the bridged token is issued on Polygon PoS. On the way back, the Polygon PoS tokens are burned and the corresponding tokens are released on Ethereum. Think of it as checking a coat: the original stays in storage while its claim ticket is used elsewhere.

For the transfer step, Polygon Bridge is a bridge for moving tokens between Ethereum and Polygon. Choose the direction that matches where your tokens are, then select the token and amount to move. Review the transaction in your wallet and approve it on the source network. The bridge coordinates the matching transfer; it does not swap one asset for another.

How do I bridge tokens from Ethereum to Polygon PoS?

Start with the wallet that holds the tokens on Ethereum. Check that you have enough ETH on Ethereum to pay that network’s transaction fee, then connect the wallet to the bridge and select Polygon PoS as the destination. Confirm the token and amount before signing the deposit transaction.

After the Ethereum transaction is confirmed, the bridge processes the deposit and makes the corresponding token available on Polygon PoS. The received token represents the asset held on Ethereum; it is not a separate purchase. Keep some POL on Polygon PoS if you plan to make further transactions there, since those transactions need the network’s gas token.

How do I bridge tokens back to Ethereum?

To return tokens, select Polygon PoS as the source and Ethereum as the destination. The withdrawal begins with a transaction on Polygon PoS, where the bridged tokens are burned. The withdrawal must then pass through the network’s checkpoint process before the tokens can be claimed on Ethereum.

Keep POL available to pay for the Polygon PoS transaction and ETH available for the final Ethereum claim. Watch the transfer status until the claim step is ready, then sign that transaction on Ethereum. A withdrawal takes more steps than a deposit because the checkpoint and claim are separate parts of the return path.

What should I check before using Polygon Bridge?

Check the direction, token, amount and destination address before signing. The bridge only moves assets that it supports, so confirm that the token you want to transfer is available for the selected route. Fees are paid on the source chain and, for a return withdrawal, again on Ethereum when claiming. A transfer can also take longer than a single on-chain transaction because the two networks record and verify their own steps.

• Keep the source chain’s gas token ready before starting.
• Keep the destination chain’s gas token ready if you will transact after the transfer.
• Review the wallet transaction details and destination before approval.
• For a withdrawal, wait for the claim step rather than treating the initial burn as completion.

The main choice is whether the destination is worth the extra chain step and its fees. A deposit locks tokens on Ethereum and makes the corresponding asset usable on Polygon PoS; a withdrawal burns that asset and requires a later Ethereum claim. Watch the bridge status through each stage, especially on the return trip.