Small code refactor

[ylmin]

Motivation

• Abstract the logic for processing messages: Abstract the logic for signing and verification into the process_message function to reduce duplicate code.
• Abstract network execution logic: Abstract the network-related execution logic into the execute_for_network function to reduce duplicate code.
• Maintain single responsibility: Although some functions are merged, each function still maintains a single responsibility to ensure code readability and maintainability.
• Merge account generation logic: The generate_account function is further refined into new_vanity_account and new_seeded_account.

Test Plan

(If you changed any code, please provide clear instructions on how you verified your changes work.)

Related PRs

(Link any related PRs here)

[vicsn]

While more DRY, this also makes the code more complex and tightly coupled. I suggest instead taking a look at existing issues to see what the community is interested in

[ylmin]

While more DRY, this also makes the code more complex and tightly coupled. I suggest instead taking a look at existing issues to see what the community is interested in

Maintain single responsibility: Although some functions are merged, each function still maintains a single responsibility to ensure code readability and maintainability.