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3ce2d9a58e
This removes the outdated copy of the SSZ code. It became incorrect over time (e.g., empty SSZ list elements), and is no longer in use by GitHub projects: https://github.com/search?q=extension%3Anim+eth%2Fssz The canonical SSZ implementation resides at `nim-ssz-serialization`. Compared to `nim-eth`, these changes were made meanwhile: - `bitseqs` was extended with JSON serialization support, and with the new functions `isZero` and `countOnes`. - `bytes_reader` was renamed to `codec`, extended with a few additional SSZ type conversions as well as support for `SingleMemberUnion`. - The simplified merkle tree implementation in `merkle_tree.nim` was removed. It was not used by other projects. - `merkleization` was extended with support for `HashArray`, `HashList` and `SingleMemberUnion`. The `isValidProof` functionality has been moved to `nimbus-eth2` and replaced with the EF defined function `is_valid_merkle_branch`. The test was also moved to `nimbus-eth2`. There are no other GitHub projects using `isValidProof`: https://github.com/search?q=extension%3Anim+isValidProof Furthermore, a definition for `GeneralizedIndex` was added. - `ssz_serialization` was moved one directory up, and improved with bug fixes and `HashArray`, `HashList` and `SingleMemberUnion` support. - `types` was extended with JSON serialization and new type support for `Uint128`, `Uint256`, `HashArray`, `HashList` and `SingleMemberUnion`. There is also a new `getBit` function for `BitList`.