lsb32 0.1.0

Sortable seven-character timestamps backed by WebAssembly

LSB32 for Python

LSB32 converts timezone-aware Python datetime values into compact, sortable, seven-character identifiers.

2026-01-01 00:00:00 UTC -> D110000

The package handles epoch offsets, packed bits, Crockford symbols, padding, WebAssembly calls, and calendar reconstruction internally.

Installation

pip install lsb32

Quick start

from datetime import datetime, timezone
from LSB32 import decode, encode

original = datetime(2026, 1, 1, tzinfo=timezone.utc)
value = encode(original)

assert value == "D110000"
assert decode(value) == original

Current time

from LSB32 import decode, now

value = now()
created = decode(value)

now() returns the encoded string directly. Decoding returns a timezone-aware UTC datetime rounded to the encoded second.

Custom epoch

The default epoch is 2000 and covers calendar years 2000 through 2063. Pass the same custom epoch to both operations when another 64-year window is needed:

from datetime import datetime, timezone
from LSB32 import decode, encode

original = datetime(2089, 12, 31, 23, 59, 59, tzinfo=timezone.utc)
value = encode(original, epoch=2026)
restored = decode(value, epoch=2026)

assert restored == original

The epoch is not stored in the identifier. Producers and consumers must use the same value.

API

Function	Result
encode(datetime, epoch=2000)	Seven-character str
decode(value, epoch=2000)	UTC datetime
now(epoch=2000)	Current time as a seven-character str

encode requires timezone information and converts the input to UTC. Subsecond precision is discarded because the wire format stores whole seconds.

Errors

from LSB32 import Error, decode

try:
    decode("D110001")
except Error as failure:
    print(failure.code, failure)

Error reports invalid length, alphabet symbols, padding, date components, and dates outside the configured epoch.

Architecture

The wheel includes lsb32.wasm and lsb32.wat. Wasmtime executes the binary module; WAT is included for inspection and reproducible tooling. The public API does not expose raw integers or WASM status codes.

Development

python -m pip install -e .
python -m unittest discover -s tests
python -m build
python -m twine check dist/*

Regenerate shared artifacts from the repository root:

node wasm.mjs

Publishing

python -m twine upload dist/*

Configure PyPI credentials before publishing.

License

This package is licensed under the GNU Lesser General Public License, either version 3 or any later version. See LICENSE and COPYING.