eip8016: add CompatibleUnion specs and tests#4581
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This follows up on ethereum#4445, ethereum#4480, and ethereum#4529 to extend EIP-8016 support for unions, making the `CompatibleUnion` type available to _features. - https://eips.ethereum.org/EIPS/eip-8016
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Implement test runner for new consensus-spec test format for EIP-8016 CompatibleUnion. New tests will automatically be picked up once they become available. - ethereum/consensus-specs#4581
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This is the final of the new SSZ types. |
jtraglia
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| - `CompatibleUnion({selector: type})` with a selector outside `uint8(1)` through | ||
| `uint8(127)` are illegal. |
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Shouldn't this allow 0 as a valid selector? [0..127].
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https://eips.ethereum.org/EIPS/eip-8016#why-are-compatibleunion-selectors-limited-to-1--127
Currently reserving 0 for two reasons:
- Preventing bugs from default zero initialization (require selection of a specific case)
- Allow future expansion into None values (right now not needed)
The selector does not indicate an offset, so does not have a base, one might use values 5 and 12 without 1 through 4.
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I see. This makes sense. My only concern is that this will be a bit confusing in practice.
If this is how it must be, I understand 👍
jtraglia
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Sep 25, 2025
jtraglia
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jtraglia
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etan-status
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Sep 25, 2025
Co-authored-by: Justin Traglia <95511699+jtraglia@users.noreply.github.com>
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This follows up on ethereum#4445, ethereum#4480, and ethereum#4529 to extend EIP-8016 support for unions, making the `CompatibleUnion` type available to _features. - https://eips.ethereum.org/EIPS/eip-8016
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Oct 16, 2025
This follows up on ethereum#4445, ethereum#4480, and ethereum#4529 to extend EIP-8016 support for unions, making the `CompatibleUnion` type available to _features. - https://eips.ethereum.org/EIPS/eip-8016
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Implement test runner for new consensus-spec test format for EIP-8016 CompatibleUnion. New tests will automatically be picked up once they become available. - ethereum/consensus-specs#4581
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* Extend SSZ generic tests with CompatibleUnion tests Implement test runner for new consensus-spec test format for EIP-8016 CompatibleUnion. New tests will automatically be picked up once they become available. - ethereum/consensus-specs#4581 * Properly process proglist SSZ generic tests * Split loading fix for next beta * Split coverage fix into next beta
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This follows up on #4445, #4480, and #4529 to extend EIP-8016 support for unions, making the
CompatibleUniontype available to _features.