I can help you resolve the issue you are facing with Solana MemCMP’s MemFilter. The error message indicates that an attribute named offset does not exist. Here are step-by-step instructions to resolve this issue:

Understanding the Context

The following options are typically used in MemCMP:

• “MemcmpOpts”: Options for MemCMP queries.

• DataSliceOpts: Options for comparing data slices.

When you run a MemFilter query, you must provide the keys and the offset (or slice) to filter the data. The offset is used to determine which parts of memory to compare.

Possible Causes of the Error

• Incorrect Key Structure

  

  : Make sure your keys are in the correct format for MemCMP. Keys must be tuples or lists that contain an “address” and a reference to a “pubkey”, “index” or other value.

• Missing offset: Make sure you provide an offset when running the query. If no offset is provided, Solana defaults to 0.

• Invalid slice comparison: Make sure the slice comparisons are correct. In MemCMP, slices can be compared using a variety of operators (e.g. ==, !=, <, >, etc.).

Solution

• Check key structure

  : Check your keys and make sure they meet MemCMP requirements. You can use tools like "solana-key-utils" or print the keys to check their format.

• Provide offset (if required): If you are using a specific slice comparison operator, be sure to provide the offset required by that operator. For example, if you are comparing slices based on their addresses, you will need to specify the "offset" key in the MemcmpOpts structure.

• Check screen comparisons: Double-check the comparisons to make sure they are correct. You can use tools like "solana-key-utils" or print the keys to check their format and correctness.

Example Code

from solana.rpc.types import MemcmpOpts, DataSliceOpts

Create a tuple of the sample key at offset 0
key = ("own_key", {"address": "own_pubkey", "index": 1})

Create a MemcmpOpts struct with the key and offset
opts = MemcmpOpts(
key=key,
slice="data_slice",
operator="==", 
Example of a comparison operator
)

Execute a MemFilter query
result = await mem_filter(opts)

In this example, we create a sample key number with an offset of 0. We then define an "opts" struct that contains the key and segment options. Finally, we execute a MemFilter query using the "mem_filter()" function.

I hope this helps you resolve the issue! If you have any additional questions or need further assistance, please feel free to ask.

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