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Bundler FAQs

I successfully submitted a user operation to the bundler, but it never got included in a block. What happened?

There can be many reasons for this. The most common are:

  • The user operation succeeds as it is being validated, but fails during the second round of simulations when it is being bundled by the bundler into a transaction to be submitted on-chain and is therefore dropped.
  • The bundle transaction bundling the user operation fails on-chain so no logs are emitted.
  • You submitted a user operation which has a nonce that is higher than the current account nonce, which means it is likely queued by the bundler until that nonce is reached.

It is recommended to use the pimlico_getUserOperationStatus endpoint to check the status of your user operation.

What is the difference between v1 and v2 endpoints?

V1 is for bundlers, while v2 is for paymasters. V2 for bundlers will be released soon with a notice period for migration.

What are fees to deploy to app-chains?

Fees vary by network. Please reach out to us for more information.