[Feature Request] Dynamic GAS Fee Calculation

[LemonHX]

Feature Request

Describe the Feature Request

Now the gas fee of Starcoin's native method is a fixed value, which simplifies the difficulty of implementation, but it may bring great risks:

For example, the fixed GAS fee we use in the current Hash module may face an attacker who can implement a Hash Collision attack with a small amount of STC.
In other words, Vec and String, an attacker can spend a small amount of gas fee to execute a contract with a long expected execution cycle, which will be catastrophic for the infrastructure

Dynamic calculation of GAS fee can at least ensure that miners still get their due income when they are attacked, and at the same time, it can ensure that some newly added native modules with dynamic length can run normally so that similar problems will not occur.

Describe Preferred Solution

• Change the container of dynamic length in stdlib and native methods whose calculation time is not fixed, such as string vector table, etc.
• The gas fee module introduces dynamic calculation after the next move update

Describe Alternatives

Related Code

Additional Context

Although the implementation of the move language itself is cumbersome, it also uses dynamic calculation of gas, so doing so can keep us consistent with the official behavior

If the feature request is approved, would you be willing to submit a PR?
Yes / No (Help can be provided if you need assistance submitting a PR)

YES