AA21 didn’t pay prefund

What it means

The bundler provider reported that the paymaster did not provide sufficient funds to sponsor this user operation.


How to fix it

No paymaster

If not using a paymaster and funding the transaction, ensure the smart account has sufficient gas funds.


thirdweb paymaster

If using the thirdweb paymaster, your sponsored transactions may have exceeded a sponsorship rule. Increase the limits for your API key from the thirdweb dashboard. For more details see Sponsorship Rules.


Other paymasters

If using Stackup, Alchemy, Pimlico, Biconomy, or other paymasters, ensure your paymaster and data values are set correctly. Consult the provider’s documentation for more details.