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Ethereum 2.0 Scenarios for Nimbus
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README.md

nim-eth2-official-tests

This repo reformats the official Ethereum 2 tests to a format suitable for Nimbus/nim-beacon-chain.

This repository is meant to be submoduled in nim-beacon-chain/tests/official/ with the fixtures name.

From the nim-beacon-chain project folder:

git submodule add https://github.com/status-im/nim-eth2-official-tests ./tests/official/fixtures

This repository allows use to workaround the current following limitations:

  • no YAML support in nim-serialization library which allows well-tested serialization and deserialization into and from Ethereum types.
  • NimYAML uses int by default for numerals and cannot deserialize 18446744073709551615 (2^64-1), the FAR_FUTURE_SLOT constant.
  • Eth2.0 tests currently uses an invalid BLS signature https://github.com/ethereum/eth2.0-tests/issues/27
  • All those workarounds requires an intermediate reformatted JSON file, but the tests are huge (100k+ lines) and will cause review issues in the main repo.

Only state tests are worked on at the moment.

State tests conversion.

Note on serialization hacks:

FAR_FUTURE_SLOT (18446744073709551615)

The FAR_FUTURE_SLOT (18446744073709551615) has been rewritten as a string in the YAML file as it's 2^64-1 and Nim by default try to parse it into a int64 (which can represents up to 2^63-1).

The YAML file is then converted to JSON for easy input to the json serialization/deserialization with beacon chain type support.

"18446744073709551615" is then replaced again by uint64 18446744073709551615.

Compressed signature

In latest_block_header field, the signatures and randao_reveals are "0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" but that is not a valid compressed BLS signature, the zero signature should be: "0xc00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"