Paymaster Addresses and Events

This page contains information on the addresses of the Circle Paymaster contracts, and the events the contracts emit during operation.

You can access the permissionless paymaster contracts at the following addresses on supported blockchains:

• Paymaster v0.7
• Paymaster v0.8

This section explains the events from the Circle Paymaster and when they are emitted. You can use these events to debug or track the state after submitting a user operation (user op) to a bundler.

These files are the main contract of the Circle Paymaster that support EntryPoint v0.7 and v0.8. The primary functions they integrate are:

• _validatePaymasterUserOp: validates the user op and charges the prefund token from the sender before execution.
• _postOp: refunds the token back to the sender when the actual amount of tokens needed is known after execution.

The contract emits this event after the _postOp is executed and the prefund token (if any) is refunded.

Attributes

Example

Using this transaction as an example, the userOperationSponsored event contains the following data: