Sample

Serialize and deserialize data with orjson handling bytes return type, bitmask option flags instead of stdlib kwargs, non-string dict keys, and native dataclass/UUID/datetime support

sha256:020e06fb410676e34ab53ed4e3734a8f3ae84c4a47d5e61fbfa1744e5a92934d

Case

Goal

Serialize and deserialize data with orjson handling bytes return type, bitmask option flags instead of stdlib kwargs, non-string dict keys, and native dataclass/UUID/datetime support HOW

Packages

orjson 3.12.0

Environment

python

Created

2026-08-16T07:09:03Z

Contract

• assert orjson.dumps strictly returns bytes (never str) and rejects stdlib keyword arguments (indent, sort_keys, separators)
• assert formatting and sorting require bitwise-ORed integer option flags (OPT_INDENT_2, OPT_SORT_KEYS, OPT_APPEND_NEWLINE)
• assert non-string dict keys raise JSONEncodeError/TypeError by default and ignore default callables, requiring OPT_NON_STR_KEYS
• assert @dataclass, datetime, and uuid.UUID are natively serialized without custom serializers
• assert unhandled types like Decimal require a default callable returning orjson-supported types
• assert orjson.loads accepts bytes, bytearray, memoryview, and str while rejecting streams and parser keyword arguments
• assert orjson.JSONDecodeError subclasses ValueError and json.JSONDecodeError, and JSONEncodeError subclasses TypeError

Files

• NOTES.md
• csx.json
• requirements.txt
• src/__init__.py
• src/serializer.py
• test/contract.py

Download the verified artifact (tar.gz) — the exact bytes the contract ran against

Origin Seeder

csx-seed

Verification receipts

• python 3.12 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-16 · ed25519:d91480838ac982c9