feat(tests): additional test cases for eip-7918

[marioevz]

Extra Test Cases EIP-7918

Blob base fee bounded by execution cost

• From: feat(tests): EIP-7918 - Blob base fee bounded by execution cost execution-spec-tests#1685 (comment), I think that we need to create a test with this value != 0, and we would need to bring back the intermediate block, to insert the appropriate number of blobs, but then we also need to be careful of parent_base_fee_per_gas. I think one way to do it would be to fill this intermediate block with transactions so that we reach exactly half of the gas limit, so that parent.parent.base_fee_per_gas == parent.base_fee_per_gas.

• chore(tests): update EIP-4844 tests to be dynamic with regards to the reserve price (EIP-7918) #1567

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• EIP-4844 Intergration
• EIP-7840 - blob schedule test cases?
• Reserve Price Activation/Deactivation
  • Boundary Conditions
    • Base fee exactly at reserve price boundary BLOB_BASE_COST * base_fee = GAS_PER_BLOB * blob_base_fee
    • Base fee just below boundary (reserve inactive)
    • Base fee just above boundary (reserve active)
    • Multiple transitions between active/inactive states
  • Reserve Price Calculation
    • Verify reserve price = BLOB_BASE_COST * base_fee_per_gas) / GAS_PER_BLOB
    • Test with various base fee values 1, 7, 16, 100, 1000, 10000, etc
    • Edge case: base_fee_per_gas = 0 (should this be possible?)
• Excess Blob Gas Calculations
  • Update Basic EIP-4844 tests
  • Update All EIP-4844 tests using intermediate "dummy genesis" block
  • Normal Mode (Reserve Inactive)
    • Standard EIP-4844 behavior: excess_blob_gas + blob_gas_used - TARGET_BLOB_GAS_PER_BLOCK
    • Various blob counts 0, target/2, target, target+1, max, account for max blob per tx limit of 6 for Osaka
  • Reserve Mode (Reserve Active)
    • Modified calculation: excess_blob_gas + blob_gas_used * (max - target) / max
    • Verify no subtraction of TARGET_BLOB_GAS_PER_BLOCK
    • Different blob counts with reserve price active like above, account for max blob per tx limit
• Multi Block Tests
  • Multiple blocks in normal/reserve mode only
  • Fee convergence in each mode
  • Mode switching: normal -> reserve -> normal etc
  • Base fee changes triggering mode switches between blocks
  • Gradual increase to max/target blobs per block.
  • Zero blob cases:
    • Start in reserve then have block with zero blobs, should stay in reserve
    • Start in normal then have blocks with zero blobs, should switch to reserve

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Please comment any additional test cases or edit the issue and add more.