44 lines
1.2 KiB
Markdown
44 lines
1.2 KiB
Markdown
# Forks
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The aim of the fork tests is to ensure that a pre-fork state can be transformed
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into a valid post-fork state, utilizing the `upgrade` function found in the relevant `fork.md` spec.
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There is only one handler: `fork`. Each fork (after genesis) is handled with the same format,
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and the particular fork boundary being tested is noted in `meta.yaml`.
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## Test case format
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### `meta.yaml`
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A yaml file to signify which fork boundary is being tested.
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```yaml
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fork: str -- Fork being transitioned to
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```
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#### Fork strings
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Key of valid `fork` strings that might be found in `meta.yaml`
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| String ID | Pre-fork | Post-fork | Function |
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| - | - | - | - |
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| `altair` | Phase 0 | Altair | `upgrade_to_altair` |
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### `pre.ssz_snappy`
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An SSZ-snappy encoded `BeaconState`, the state before running the fork transition.
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### `post.ssz_snappy`
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An SSZ-snappy encoded `BeaconState`, the state after applying the fork transition.
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*Note*: This type is the `BeaconState` after the fork and is *not* the same type as `pre`.
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## Processing
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To process this test, pass `pre` into the upgrade function defined by the `fork` in `meta.yaml`.
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## Condition
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The resulting state should match the expected `post`.
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