gsn-sponsor

gsn-sponsor

GSN2 - Sponsor model, above the basic tabookey-gasless GSN model.

In GSN, a RelayRecipient performs 3 separate tasks:

1. Validation: decide whether to accept the relayed call.
2. Execution: call the actual target method.
3. Accounting: perform logic before/after the relayed call, to get compensated for the gas.

GsnSponsor defines 2 separate entities:

• Call-Recipient: the entity that actually execute the call.
• Gas-Recipient: the entity that handles the gas payments (this is the "sponsor")

The Gas-Recipient can whitelist senders or target contracts. But the interesting scenario where the sponsor makes the actual sender pay for the call - by other means than gas (ETH) - like pay with tokens.