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Forks

The aim of the fork tests is to ensure that a pre-fork state can be transformed into a valid post-fork state, utilizing the upgrade function found in the relevant fork.md spec.

There is only one handler: fork. Each fork (after genesis) is handled with the same format, and the particular fork boundary being tested is noted in meta.yaml.

Test case format

`meta.yaml`

A yaml file to signify which fork boundary is being tested.

fork: str    -- Fork being transitioned to

Fork strings

Key of valid fork strings that might be found in meta.yaml

String ID	Pre-fork	Post-fork	Function
`altair`	Phase 0	Altair	`upgrade_to_lightclient_patch`

`pre.ssz_snappy`

A SSZ-snappy encoded BeaconState, the state before running the fork transition.

`post.ssz_snappy`

A SSZ-snappy encoded BeaconState, the state after applying the fork transition.

Note: This type is the BeaconState after the fork and is not the same type as pre.

Processing

To process this test, pass pre into the upgrade function defined by the fork in meta.yaml.

Condition

The resulting state should match the expected post.

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