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feat(specs,tests): type EIP-8250 nonce keys by their most significant byte - #3724

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spencer-tb wants to merge 2 commits into
ethereum:eips/bogota/eip-8250from
spencer-tb:eip-8250-nonce-type
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spencer-tb wants to merge 2 commits into
ethereum:eips/bogota/eip-8250from
spencer-tb:eip-8250-nonce-type

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@spencer-tb

@spencer-tb spencer-tb commented Oct 6, 2026 •

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Description

Merge order: independent of #3722 and #3725, merge once ethereum/EIPs#12352 merges.

Implements ethereum/EIPs#12352 on eips/bogota/eip-8250: a nonce key's most significant byte is its type. Keys of a reserved type are rejected at decode, and a binary key only accepts sequence zero on an unused slot and is written once. The tests re-derive the key boundaries for typed keys and cover general, binary and reserved types, including slot separation between types and binary single use within a block.

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  • Ran fast static checks to avoid CI fails, see Code Standards & Verifying Changes: just static
  • PR title has the form <type>(<area>): <title>, where <type> and <area> come from an appropriate C-<type>, respectively A-<area>, label. The title should match the target squash commit message.

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codecov Bot commented Oct 6, 2026 •

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Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (eips/bogota/eip-8250@ae5c566). Learn more about missing BASE report.

Additional details and impacted files
@@                   Coverage Diff                   @@
##             eips/bogota/eip-8250    #3724   +/-   ##
=======================================================
  Coverage                        ?   94.93%           
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  Files                           ?      677           
  Lines                           ?    41943           
  Branches                        ?     3968           
=======================================================
  Hits                            ?    39819           
  Misses                          ?     1470           
  Partials                        ?      654           
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unittests 94.93% <100.00%> (?)

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