task_template.py

import torch
import requests
import sys
import os

# --------------------------------
# LOADING THE GRADIENTS
# --------------------------------

"""
Gradient contents (gradients/model{i}.pt):

- "gradients": dict {parameter_name -> gradient tensor}, mirroring the
               model's named_parameters()
- "family": "mlp", "cnn", or "vit"
- "activation": "relu" | "tanh" | "sigmoid" | "gelu"
- "feature_shape": (C, H, W) per-image input feature shape
- "batch_size": 128
"""

grad = torch.load(os.path.join("gradients", "model1.pt"), weights_only=False)
print("gradient file keys:", list(grad))
print("  family:", grad["family"], "| activation:", grad["activation"],
      "| feature_shape:", grad["feature_shape"], "| batch_size:", grad["batch_size"])
print("  gradient tensors:")
for name, g in grad["gradients"].items():
    print(f"    {name:14} {tuple(g.shape)}")

# --------------------------------
# LOADING THE MODEL (white-box)
# --------------------------------

"""
Model contents (models/model{i}.pt):

A plain state_dict {parameter_name -> weight tensor}
Further information regarding the model can be found in the corresponding gradient file.
"""

state = torch.load(os.path.join("models", "model1.pt"), weights_only=False)
print("\nmodel state_dict keys:", list(state))
for name, w in state.items():
    print(f"    {name:14} {tuple(w.shape)}")

# --------------------------------
# SUBMISSION FORMAT
# --------------------------------

"""
The submission must be a .pt file that torch.load()s to a dict with EXACTLY
the keys "model1" ... "model12". Each value is a tensor of your reconstructed
images for that model:

- shape: (128, 3, 64, 64)
- dtype: float32
- pixel values in the [0, 1] range

The 128 images do not have to be in any particular order: each is matched to
the nearest ground-truth image (one-to-one, no reuse) and scored by SSIM.
"""

# Example submission:

submission = {
    f"model{i}": torch.rand(128, 3, 64, 64, dtype=torch.float32)   # values in [0, 1]
    for i in range(1, 12 + 1)
}
torch.save(submission, "example_submission.pt")

# --------------------------------
# SUBMISSION PROCESS
# --------------------------------

"""
FL Audit Task — Participant Submission Guide
========================================================

You will upload a single **.pt** file that torch.load()s to a dictionary with
keys **model1** through **model12**, each mapping to a tensor of 128
reconstructed images. The evaluator loads your file, runs shape/dtype/range
checks, and then scores it against the private ground-truth images.

Follow these rules carefully to avoid automatic rejection.

1) File format
--------------
- **Extension:** `.pt` (a Torch-saved dictionary)
- **Content:** must contain EXACTLY the keys `model1`, `model2`, ..., `model12`
  (no more, no fewer; note: no underscore).
- **Max file size:** 300 MB (hard limit). Larger files are rejected.

2) Per-model tensor requirements
--------------------------------
Each value `submission["model{i}"]` must be:
- **Shape:** exactly `(128, 3, 64, 64)`.
- **Dtype:** a floating-point tensor (it is cast to float32).
- **Range:** all pixel values in `[0, 1]`.
- **Finite:** no NaN or Inf values.

3) Scoring
----------
For each model your 128 images are matched one-to-one (no reuse) to that model's
128 private images via a Hungarian assignment that maximises the total SSIM (the
matching is done per model, not across models). Your score is the mean matched-pair
SSIM. During the hackathon the leaderboard shows your score on a fixed 30% subset of
the images; the final ranking uses the held-out 70%.

4) Typical failure messages & what they mean
--------------------------------------------
- "File extension must be .pt (a torch-saved dict of model1..model12)."
  → Wrong extension.
- "Submission must be a dict with keys 'model1'..'model12', got a ..."
  → The file did not load to a dictionary.
- "Missing key(s): [...]." / "Unexpected key(s): [...]."
  → Your keys are not exactly model1..model12.
- "model{i}: images must have shape (128, 3, 64, 64), got (...)."
  → Shape mismatch (wrong count or resolution -- remember to upsample to 64x64).
- "model{i}: images must be a float tensor (dtype ... given)."
  → Submit float images, not uint8/integers.
- "model{i}: pixel values must be in [0, 1], got min ... max ..."
  → Rescale your images into [0, 1].
- "model{i}: images contain NaN or Inf values."
  → Clean up invalid values before submitting.
- "File too large: limit 314572800 bytes."
  → Your file exceeds 300 MB.
"""

BASE_URL  = "http://35.192.205.84"
API_KEY   = "YOUR_API_KEY_HERE"

TASK_ID   = "21-fl-audit"
FILE_PATH = "example_submission.pt"
SUBMIT    = False                  # set True to actually upload FILE_PATH

def die(msg):
    print(f"{msg}", file=sys.stderr)
    sys.exit(1)


if not SUBMIT:
    print("SUBMIT is False -- set SUBMIT = True (and your API_KEY/FILE_PATH) to upload.")
    sys.exit(0)

if not os.path.isfile(FILE_PATH):
    die(f"File not found: {FILE_PATH}")

try:
    with open(FILE_PATH, "rb") as f:
        files = {
            "file": (os.path.basename(FILE_PATH), f, "application/octet-stream"),
        }
        resp = requests.post(
            f"{BASE_URL}/submit/{TASK_ID}",
            headers={"X-API-Key": API_KEY},
            files=files,
            timeout=(10, 120),
        )
    try:
        body = resp.json()
    except Exception:
        body = {"raw_text": resp.text}

    if resp.status_code == 413:
        die("Upload rejected: file too large (HTTP 413). Reduce size and try again.")

    resp.raise_for_status()

    submission_id = body.get("submission_id")
    print("Successfully submitted.")
    print("Server response:", body)
    if submission_id:
        print(f"Submission ID: {submission_id}")

except requests.exceptions.RequestException as e:
    detail = getattr(e, "response", None)
    print(f"Submission error: {e}")
    if detail is not None:
        try:
            print("Server response:", detail.json())
        except Exception:
            print("Server response (text):", detail.text)
    sys.exit(1)