# What is the difference between GSNv1 and GSNv2?
The major changes in GSNv2:
- RelayRecipient no longer handle its own gas. it only uses
msg.sender) to determine its caller.
- A new entity named Paymaster was added. A single Paymaster can handle the gas of one or several RelayRecipient contracts
- Relays can have multiple worker addresses, so that they can have more than one outstanding tx
- Recipient trusts a single, small contract (TrustedForwarder) instead the entire RelayHub codebase (since recipient doesn't handle gas, all it cares is that the signature of the sender was verified, and the request is not a replay)