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The dataset generation failed
Error code: DatasetGenerationError
Exception: CastError
Message: Couldn't cast
user_id: string
history: list<item: struct<id: int64, timestamp: timestamp[s], amount: double, merchant_id: string, is_fraud: (... 8 chars omitted)
child 0, item: struct<id: int64, timestamp: timestamp[s], amount: double, merchant_id: string, is_fraud: int64>
child 0, id: int64
child 1, timestamp: timestamp[s]
child 2, amount: double
child 3, merchant_id: string
child 4, is_fraud: int64
location: string
description: string
merchant_id: string
risk_tier: double
merchant_category: string
audit_date: timestamp[s]
known_fraud_pattern: string
to
{'merchant_id': Value('string'), 'merchant_category': Value('string'), 'description': Value('string'), 'risk_tier': Value('float64'), 'audit_date': Value('timestamp[s]'), 'known_fraud_pattern': Value('string'), 'location': Value('string')}
because column names don't match
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1827, in _prepare_split_single
for key, table in generator:
^^^^^^^^^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 613, in wrapped
for item in generator(*args, **kwargs):
~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
self._cast_table(pa_table, json_field_paths=json_field_paths),
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
pa_table = table_cast(pa_table, self.info.features.arrow_schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
raise CastError(
...<3 lines>...
)
datasets.table.CastError: Couldn't cast
user_id: string
history: list<item: struct<id: int64, timestamp: timestamp[s], amount: double, merchant_id: string, is_fraud: (... 8 chars omitted)
child 0, item: struct<id: int64, timestamp: timestamp[s], amount: double, merchant_id: string, is_fraud: int64>
child 0, id: int64
child 1, timestamp: timestamp[s]
child 2, amount: double
child 3, merchant_id: string
child 4, is_fraud: int64
location: string
description: string
merchant_id: string
risk_tier: double
merchant_category: string
audit_date: timestamp[s]
known_fraud_pattern: string
to
{'merchant_id': Value('string'), 'merchant_category': Value('string'), 'description': Value('string'), 'risk_tier': Value('float64'), 'audit_date': Value('timestamp[s]'), 'known_fraud_pattern': Value('string'), 'location': Value('string')}
because column names don't match
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1369, in compute_config_parquet_and_info_response
parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
~~~~~~~~~~~~~~~~~~~~~~~~~^
builder, max_dataset_size_bytes=max_dataset_size_bytes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 948, in stream_convert_to_parquet
builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1694, in _prepare_split
for job_id, done, content in self._prepare_split_single(
~~~~~~~~~~~~~~~~~~~~~~~~~~^
gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
):
^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1880, in _prepare_split_single
raise DatasetGenerationError("An error occurred while generating the dataset") from e
datasets.exceptions.DatasetGenerationError: An error occurred while generating the datasetNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
merchant_id string | merchant_category string | description string | risk_tier float64 | audit_date timestamp[s] | known_fraud_pattern string | location string |
|---|---|---|---|---|---|---|
merchant_0000 | giftcard | Prepaid gift-card marketplace with high fraud. Under review since 2024-08. | 0.841 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | TOR |
merchant_0001 | giftcard | Prepaid gift-card marketplace with high fraud. Under review since 2024-08. | 0.614 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | SNG |
merchant_0002 | travel | Luxury travel charter and boutique agency. Audit 2023 clean. | 0.302 | 2023-12-15T00:00:00 | luxury travel health wire | NYC |
merchant_0003 | health | Bulk health products with private resale. Audit 2023 clean. | 0.153 | 2023-12-15T00:00:00 | luxury travel health wire | SNG |
merchant_0004 | health | Premium health supplement distributor. Under review since 2024-08. | 0.248 | 2023-12-15T00:00:00 | luxury travel health wire | DXB |
merchant_0005 | health | Bulk health products with private resale. Audit 2023 clean. | 0.199 | 2023-12-15T00:00:00 | luxury travel health wire | MUM |
merchant_0006 | giftcard | Gift card bulk purchase aggregator. Under review since 2024-08. | 0.688 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | TOR |
merchant_0007 | giftcard | Gift card bulk purchase aggregator. Under review since 2024-08. | 0.666 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | PAR |
merchant_0008 | luxury | High-end luxury resale with wire settlement. Audit 2023 clean. | 0.265 | 2023-12-15T00:00:00 | luxury travel health wire | HKG |
merchant_0009 | giftcard | Prepaid gift-card marketplace with high fraud. Audit 2023 clean. | 0.821 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | SNG |
merchant_0010 | giftcard | Gift card bulk purchase aggregator. Under review since 2024-08. | 0.947 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | LDN |
merchant_0011 | giftcard | Gift card bulk purchase aggregator. Under review since 2024-08. | 0.702 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | SYD |
merchant_0012 | health | Bulk health products with private resale. Flagged 2024 for velocity. | 0.143 | 2023-12-15T00:00:00 | luxury travel health wire | HKG |
merchant_0013 | health | Premium health supplement distributor. Audit 2023 clean. | 0.337 | 2024-02-20T00:00:00 | luxury travel health wire | TOR |
merchant_0014 | giftcard | Prepaid gift-card marketplace with high fraud. Audit 2023 clean. | 0.704 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | SYD |
merchant_0015 | health | Premium health supplement distributor. Under review since 2024-08. | 0.204 | 2023-12-15T00:00:00 | luxury travel health wire | SYD |
merchant_0016 | luxury | High-end luxury resale with wire settlement. Flagged 2024 for velocity. | 0.172 | 2024-02-20T00:00:00 | luxury travel health wire | MUM |
merchant_0017 | health | Premium health supplement distributor. No prior incidents. | 0.312 | 2023-12-15T00:00:00 | luxury travel health wire | PAR |
merchant_0018 | luxury | Luxury watch and goods private sale network. Under review since 2024-08. | 0.138 | 2023-12-15T00:00:00 | luxury travel health wire | LDN |
merchant_0019 | travel | Travel agency handling urgent charter wires. Audit 2023 clean. | 0.237 | 2023-12-15T00:00:00 | luxury travel health wire | PAR |
merchant_0020 | giftcard | Gift card bulk purchase aggregator. Audit 2023 clean. | 0.939 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | PAR |
merchant_0021 | health | Premium health supplement distributor. No prior incidents. | 0.358 | 2023-12-15T00:00:00 | luxury travel health wire | HKG |
merchant_0022 | luxury | High-end luxury resale with wire settlement. Audit 2023 clean. | 0.17 | 2023-12-15T00:00:00 | luxury travel health wire | TKY |
merchant_0023 | travel | Luxury travel charter and boutique agency. Under review since 2024-08. | 0.328 | 2023-12-15T00:00:00 | luxury travel health wire | BER |
merchant_0024 | travel | Travel agency handling urgent charter wires. Audit 2023 clean. | 0.339 | 2023-12-15T00:00:00 | luxury travel health wire | BER |
merchant_0025 | health | Premium health supplement distributor. Under review since 2024-08. | 0.338 | 2023-12-15T00:00:00 | luxury travel health wire | MUM |
merchant_0026 | health | Premium health supplement distributor. Under review since 2024-08. | 0.143 | 2023-12-15T00:00:00 | luxury travel health wire | SNG |
merchant_0027 | travel | Luxury travel charter and boutique agency. Under review since 2024-08. | 0.303 | 2023-12-15T00:00:00 | luxury travel health wire | DXB |
merchant_0028 | giftcard | Prepaid gift-card marketplace with high fraud. Under review since 2024-08. | 0.76 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | SYD |
merchant_0029 | giftcard | Gift card bulk purchase aggregator. Flagged 2024 for velocity. | 0.726 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | NYC |
merchant_0030 | luxury | High-end luxury resale with wire settlement. No prior incidents. | 0.36 | 2024-02-20T00:00:00 | luxury travel health wire | SFO |
merchant_0031 | giftcard | Prepaid gift-card marketplace with high fraud. No prior incidents. | 0.681 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | TKY |
merchant_0032 | travel | Travel agency handling urgent charter wires. Flagged 2024 for velocity. | 0.371 | 2023-12-15T00:00:00 | luxury travel health wire | SYD |
merchant_0033 | travel | Luxury travel charter and boutique agency. No prior incidents. | 0.127 | 2024-02-20T00:00:00 | luxury travel health wire | BER |
merchant_0034 | travel | Luxury travel charter and boutique agency. Flagged 2024 for velocity. | 0.363 | 2023-12-15T00:00:00 | luxury travel health wire | SNG |
merchant_0035 | giftcard | Gift card bulk purchase aggregator. No prior incidents. | 0.93 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | DXB |
merchant_0036 | luxury | Luxury watch and goods private sale network. Under review since 2024-08. | 0.142 | 2024-02-20T00:00:00 | luxury travel health wire | HKG |
merchant_0037 | giftcard | Prepaid gift-card marketplace with high fraud. No prior incidents. | 0.738 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | DXB |
merchant_0038 | luxury | High-end luxury resale with wire settlement. Under review since 2024-08. | 0.382 | 2023-12-15T00:00:00 | luxury travel health wire | NYC |
merchant_0039 | giftcard | Prepaid gift-card marketplace with high fraud. Flagged 2024 for velocity. | 0.822 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | PAR |
merchant_0040 | travel | Travel agency handling urgent charter wires. Audit 2023 clean. | 0.384 | 2023-12-15T00:00:00 | luxury travel health wire | LDN |
merchant_0041 | travel | Luxury travel charter and boutique agency. Flagged 2024 for velocity. | 0.211 | 2023-12-15T00:00:00 | luxury travel health wire | TOR |
merchant_0042 | health | Bulk health products with private resale. Flagged 2024 for velocity. | 0.296 | 2023-12-15T00:00:00 | luxury travel health wire | SNG |
merchant_0043 | giftcard | Gift card bulk purchase aggregator. No prior incidents. | 0.756 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | PAR |
merchant_0044 | giftcard | Prepaid gift-card marketplace with high fraud. No prior incidents. | 0.697 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | SYD |
merchant_0045 | health | Premium health supplement distributor. Flagged 2024 for velocity. | 0.279 | 2024-02-20T00:00:00 | luxury travel health wire | TKY |
merchant_0046 | travel | Luxury travel charter and boutique agency. Flagged 2024 for velocity. | 0.33 | 2023-12-15T00:00:00 | luxury travel health wire | TKY |
merchant_0047 | giftcard | Prepaid gift-card marketplace with high fraud. Flagged 2024 for velocity. | 0.809 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | BER |
merchant_0048 | health | Bulk health products with private resale. Flagged 2024 for velocity. | 0.36 | 2023-12-15T00:00:00 | luxury travel health wire | TKY |
merchant_0049 | giftcard | Prepaid gift-card marketplace with high fraud. Audit 2023 clean. | 0.618 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | HKG |
merchant_0050 | luxury | Luxury watch and goods private sale network. Under review since 2024-08. | 0.209 | 2023-12-15T00:00:00 | luxury travel health wire | TKY |
merchant_0051 | travel | Luxury travel charter and boutique agency. No prior incidents. | 0.389 | 2023-12-15T00:00:00 | luxury travel health wire | MUM |
merchant_0052 | luxury | High-end luxury resale with wire settlement. Audit 2023 clean. | 0.373 | 2023-12-15T00:00:00 | luxury travel health wire | SFO |
merchant_0053 | travel | Luxury travel charter and boutique agency. Audit 2023 clean. | 0.287 | 2024-02-20T00:00:00 | luxury travel health wire | MUM |
merchant_0054 | health | Bulk health products with private resale. Under review since 2024-08. | 0.229 | 2023-12-15T00:00:00 | luxury travel health wire | PAR |
merchant_0055 | travel | Luxury travel charter and boutique agency. Under review since 2024-08. | 0.169 | 2023-12-15T00:00:00 | luxury travel health wire | MUM |
merchant_0056 | travel | Luxury travel charter and boutique agency. No prior incidents. | 0.3 | 2023-12-15T00:00:00 | luxury travel health wire | SYD |
merchant_0057 | health | Premium health supplement distributor. Audit 2023 clean. | 0.128 | 2024-02-20T00:00:00 | luxury travel health wire | BER |
merchant_0058 | travel | Luxury travel charter and boutique agency. No prior incidents. | 0.223 | 2024-02-20T00:00:00 | luxury travel health wire | MUM |
merchant_0059 | giftcard | Gift card bulk purchase aggregator. No prior incidents. | 0.723 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | PAR |
merchant_0060 | health | Bulk health products with private resale. Flagged 2024 for velocity. | 0.205 | 2023-12-15T00:00:00 | luxury travel health wire | SNG |
merchant_0061 | health | Premium health supplement distributor. Under review since 2024-08. | 0.392 | 2023-12-15T00:00:00 | luxury travel health wire | PAR |
merchant_0062 | health | Premium health supplement distributor. No prior incidents. | 0.182 | 2024-02-20T00:00:00 | luxury travel health wire | DXB |
merchant_0063 | luxury | Luxury watch and goods private sale network. Flagged 2024 for velocity. | 0.27 | 2023-12-15T00:00:00 | luxury travel health wire | PAR |
merchant_0064 | luxury | Luxury watch and goods private sale network. Audit 2023 clean. | 0.165 | 2023-12-15T00:00:00 | luxury travel health wire | DXB |
merchant_0065 | travel | Travel agency handling urgent charter wires. No prior incidents. | 0.27 | 2023-12-15T00:00:00 | luxury travel health wire | BER |
merchant_0066 | health | Premium health supplement distributor. Audit 2023 clean. | 0.299 | 2023-12-15T00:00:00 | luxury travel health wire | SNG |
merchant_0067 | travel | Luxury travel charter and boutique agency. Audit 2023 clean. | 0.133 | 2023-12-15T00:00:00 | luxury travel health wire | TOR |
merchant_0068 | giftcard | Prepaid gift-card marketplace with high fraud. Audit 2023 clean. | 0.945 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | TKY |
merchant_0069 | health | Premium health supplement distributor. No prior incidents. | 0.136 | 2023-12-15T00:00:00 | luxury travel health wire | BER |
merchant_0070 | giftcard | Prepaid gift-card marketplace with high fraud. Flagged 2024 for velocity. | 0.892 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | HKG |
merchant_0071 | travel | Luxury travel charter and boutique agency. Under review since 2024-08. | 0.376 | 2023-12-15T00:00:00 | luxury travel health wire | SFO |
merchant_0072 | luxury | High-end luxury resale with wire settlement. Under review since 2024-08. | 0.222 | 2023-12-15T00:00:00 | luxury travel health wire | SFO |
merchant_0073 | travel | Travel agency handling urgent charter wires. No prior incidents. | 0.353 | 2023-12-15T00:00:00 | luxury travel health wire | TOR |
merchant_0074 | giftcard | Gift card bulk purchase aggregator. Under review since 2024-08. | 0.861 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | LDN |
merchant_0075 | health | Premium health supplement distributor. Flagged 2024 for velocity. | 0.205 | 2024-02-20T00:00:00 | luxury travel health wire | BER |
merchant_0076 | travel | Luxury travel charter and boutique agency. Audit 2023 clean. | 0.159 | 2024-02-20T00:00:00 | luxury travel health wire | PAR |
merchant_0077 | health | Premium health supplement distributor. Flagged 2024 for velocity. | 0.288 | 2023-12-15T00:00:00 | luxury travel health wire | SFO |
merchant_0078 | luxury | High-end luxury resale with wire settlement. No prior incidents. | 0.288 | 2023-12-15T00:00:00 | luxury travel health wire | SYD |
merchant_0079 | luxury | High-end luxury resale with wire settlement. No prior incidents. | 0.206 | 2023-12-15T00:00:00 | luxury travel health wire | NYC |
merchant_0080 | luxury | Luxury watch and goods private sale network. No prior incidents. | 0.123 | 2024-02-20T00:00:00 | luxury travel health wire | SFO |
merchant_0081 | health | Bulk health products with private resale. Under review since 2024-08. | 0.386 | 2023-12-15T00:00:00 | luxury travel health wire | SFO |
merchant_0082 | travel | Luxury travel charter and boutique agency. No prior incidents. | 0.25 | 2023-12-15T00:00:00 | luxury travel health wire | DXB |
merchant_0083 | health | Premium health supplement distributor. Flagged 2024 for velocity. | 0.312 | 2023-12-15T00:00:00 | luxury travel health wire | SFO |
merchant_0084 | health | Premium health supplement distributor. No prior incidents. | 0.185 | 2023-12-15T00:00:00 | luxury travel health wire | SFO |
merchant_0085 | travel | Luxury travel charter and boutique agency. No prior incidents. | 0.128 | 2023-12-15T00:00:00 | luxury travel health wire | HKG |
merchant_0086 | luxury | Luxury watch and goods private sale network. No prior incidents. | 0.299 | 2023-12-15T00:00:00 | luxury travel health wire | PAR |
merchant_0087 | luxury | High-end luxury resale with wire settlement. Flagged 2024 for velocity. | 0.381 | 2023-12-15T00:00:00 | luxury travel health wire | DXB |
merchant_0088 | travel | Luxury travel charter and boutique agency. Audit 2023 clean. | 0.227 | 2023-12-15T00:00:00 | luxury travel health wire | BER |
merchant_0089 | health | Premium health supplement distributor. No prior incidents. | 0.246 | 2023-12-15T00:00:00 | luxury travel health wire | LDN |
merchant_0090 | health | Bulk health products with private resale. Audit 2023 clean. | 0.262 | 2023-12-15T00:00:00 | luxury travel health wire | PAR |
merchant_0091 | luxury | High-end luxury resale with wire settlement. Flagged 2024 for velocity. | 0.146 | 2023-12-15T00:00:00 | luxury travel health wire | SFO |
merchant_0092 | giftcard | Gift card bulk purchase aggregator. Under review since 2024-08. | 0.728 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | SFO |
merchant_0093 | giftcard | Prepaid gift-card marketplace with high fraud. Under review since 2024-08. | 0.684 | 2024-02-20T00:00:00 | urgent crypto/gambling bulk | TKY |
merchant_0094 | giftcard | Prepaid gift-card marketplace with high fraud. Under review since 2024-08. | 0.699 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | BER |
merchant_0095 | health | Premium health supplement distributor. Flagged 2024 for velocity. | 0.116 | 2023-12-15T00:00:00 | luxury travel health wire | LDN |
merchant_0096 | health | Premium health supplement distributor. No prior incidents. | 0.148 | 2023-12-15T00:00:00 | luxury travel health wire | MUM |
merchant_0097 | luxury | Luxury watch and goods private sale network. Flagged 2024 for velocity. | 0.365 | 2023-12-15T00:00:00 | luxury travel health wire | MUM |
merchant_0098 | giftcard | Prepaid gift-card marketplace with high fraud. Flagged 2024 for velocity. | 0.629 | 2023-12-15T00:00:00 | urgent crypto/gambling bulk | LDN |
merchant_0099 | luxury | High-end luxury resale with wire settlement. Flagged 2024 for velocity. | 0.186 | 2023-12-15T00:00:00 | luxury travel health wire | BER |
End of preview.
Phantom Ledger: Chimera v2 — Synthetic Multi-Modal Fraud Ledger
Synthetic dataset (MIT) generated from scratch via dataset/raw/generate_chimera_v2.py (seed 42). No real PII.
- 18,216 transactions (4.54% fraud, train 4.34% / test 5.44%, drift 2024-09-01)
- 1,200 merchants (KB) + 2,500 users + 18,216 receipt images (420×220)
- Modalities: ledger.csv (28 cols), receipts/*.png (border leak + tampered amount), merchant_kb.jsonl (stale PRE), user_sequences.jsonl (future-leak)
See ATTRIBUTION.md and dataset/description.md for verified inspiration sources (AI4I CC BY 4.0, Fashion MIT, TSMPD ODC-By, CLIMB MIT, LiveRAG ODC-By, GraphRAG-Bench MIT; GaRAGe CC BY-NC 4.0 inspiration-only).
Usage
# regenerate
python3.11 dataset/raw/generate_chimera_v2.py
# prepare
from pathlib import Path; from challenge.prepare import prepare
prepare(Path("dataset/raw"), Path("challenge/public"), Path("challenge/private"))
Structure
ledger.csv/data.csv— 18216 rows, 28 cols incl.is_fraudmerchant_kb.jsonl— 1200 merchantsreceipts/{id}.png— 18216 receiptsuser_sequences.jsonl— 2420 users
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