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New evmone API: StateView & StateDiff #802

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New evmone API: StateView & StateDiff #802

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Commits on Sep 30, 2024

  1. state: Introduce StateDiff 

    Introduce the type `StateDiff` to represent a set of modifications
to the State. Implement the procedure to collect the set of changes
out of an intra state object.
    @chfast
    chfast committed Sep 30, 2024
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  2. test: Implement StateDiff handling in TestState 

    Implement `TestState::appy(StateDiff)` procedure to apply state changes
back to the state.
    @chfast
    chfast committed Sep 30, 2024
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  3. state: Produce StateDiff from state modifying functions 

    Return `StateDiff` out of:
- `state::transition()` (as a subobject of `TransactionReceipt`)
- `state::system_call()`
- `state::finalize()`
    @chfast
    chfast committed Sep 30, 2024
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  4. state: Introduce StateView interface 

    Introduce `StateView` interface as a way to read the initial/cold State.
    @chfast
    chfast committed Sep 30, 2024
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  5. test: TestState implements StateView 

    Implement `StateView` interface in `TestState`. This will be used later.
    @chfast
    chfast committed Sep 30, 2024
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  6. state: Use StateView from State 

    Modify the `State` to require `StateView` interface as a parameter
and use it to read the initial state values.

This drops `TestState` dependency on `State`.
    @chfast
    chfast committed Sep 30, 2024
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