| # SimECNY |
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| A simulator of wallet account, transaction, and closure for E-CNY. |
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| ## Data Simulation |
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| ### Wallet Creation Simulator |
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| `python open_wallet_distribution_based.py` |
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| Generated Files `accounts.csv` |
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| ### Wallet Transaction Simulator |
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| `python generate_static_edges.py` |
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| `python python simplified_main.py` |
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| Generated Files `wallet_static_edges_distribution_based.csv` `wallet_temporal_transactions_1105_1450.csv` |
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| ### Wallet Closure Simulator |
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| `python generate_wallet_close_data.py` |
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| Generated Files `new_close_3.csv` |
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| ## Data Description |
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| ### I. Wallet Opening Module Attributes |
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| The wallet opening data file records all relevant information when a wallet account is opened, including basic wallet information, identity authentication information, bank account information, region information, etc. |
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| No. | Attribute Name | Chinese Description | Data Type | Description |
| ----|-------------------------------|--------------------------------|-------------|------------------------------------------ |
| 1 | wallet_id | Wallet ID | String | Unique wallet identifier, numeric string |
| 2 | wallet_type | Wallet Type | Integer | 1-Corporate wallet, 2-Personal wallet, 3-Merchant wallet |
| 3 | wallet_level | Wallet Level | Integer | 1-Class I wallet, 2-Class II wallet, 3-Class III wallet, 4-Class IV wallet |
| 4 | wallet_open_cert | Opening ID Card Number | String | 18-digit ID card number, can be empty (Class IV wallets do not have this field) |
| 5 | wallet_open_cert_expire | ID Card Expiry Date | String | Format: YYYY-MM-DD, can be empty (Class IV wallets do not have this field) |
| 6 | wallet_open_date | Wallet Opening Date | String | Format: YYYY-MM-DD |
| 7 | wallet_open_timestamp | Wallet Opening Timestamp | String | Format: YYYY-MM-DD HH:MM:SS |
| 8 | wallet_open_tel | Opening Phone Number | String | 11-digit phone number |
| 9 | realname_auth_time | Real-name Authentication Time | String | Format: YYYY-MM-DD HH:MM:SS, can be empty (Class IV wallets do not have this field) |
| 10 | accociated_bank_account | Associated Bank Account (Full) | String | Full bank account number, can be empty (Class III and IV wallets do not have this field) |
| 11 | bank_account_number | Bank Account Number (First 4) | String | First 4 digits of bank account number, can be empty (Class III and IV wallets do not have this field) |
| 12 | init_balance | Initial Balance | Float | Initial balance when wallet is opened, 2 decimal places |
| 13 | region_code | Region Code | String | Region code used to identify the wallet's region |
| 14 | is_abnormal | Is Abnormal Account | Boolean | True/False or 1/0, indicates whether it is an abnormal account |
| 15 | open_device | Opening Device (MAC Address) | String | MAC address format (XX:XX:XX:XX:XX:XX), can be empty (if NaN, then opened at counter) |
| 16 | open_ip | Opening IP Address | String | IP address, can be empty (if NaN, then opened at counter) |
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| Notes: |
| - Wallet Level Rules: |
| * Class I and II wallets: Require all fields (bank card, ID card, authentication time, etc.) |
| * Class III wallets: Do not require bank card binding, but require ID card and authentication time |
| * Class IV wallets: Do not require bank card, ID card, expiry date, or authentication time |
| - Counter Opening: Approximately 10% of wallets are opened at counters, in which case open_device and open_ip are empty |
| - ID Card and Phone Number Reuse: According to configuration, some ID cards and phone numbers can be shared by multiple wallets |
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| ### II. Transaction Module Attributes |
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| The transaction data file records all transaction records between wallets, including basic transaction information, transaction patterns, risk indicators, device information, etc. |
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| No. | Attribute Name | Chinese Description | Data Type | Description |
| ----|-------------------------------|--------------------------------|-------------|------------------------------------------ |
| 1 | tx_id | Transaction ID | String | Unique transaction identifier |
| 2 | timestamp | Transaction Timestamp | String | Format: YYYY-MM-DD HH:MM:SS |
| 3 | src | Source Wallet ID | String | Unique identifier of the source wallet |
| 4 | dst | Destination Wallet ID | String | Unique identifier of the destination wallet |
| 5 | amount | Transaction Amount | Float | Transaction amount, 2 decimal places |
| 6 | transaction_motif | Transaction Motif Type | String | Transaction type, such as: single_transaction, normal_small_high_freq,regular_large_low_freq, class4_laundering,merchant_laundering, online_laundering, small_amount_testing, etc. |
| 7 | motif_id | Motif ID | String | Transactions sharing the same transaction pattern share the same motif_id |
| 8 | transaction_mode | Transaction Mode | String | Transaction mode: single_transaction, forward, fan_out, fan_in, one_to_many, many_to_one, many_to_many |
| 9 | is_risk | Is Risk Transaction | String | '0' indicates normal transaction, '1' indicates risk transaction |
| 10 | is_src_victim | Is Source a Victim | Integer | 0 or 1, indicates whether the source is a victim account (for abnormal transaction analysis, mainly based on IP and device changes; if different from opening IP/device, it's fraud; if same, it's induced participation) |
| 11 | src_bank_account_number | Source Bank Account Number | String | First 4 digits of source bank account number |
| 12 | dst_bank_account_number | Destination Bank Account Number | String | First 4 digits of destination bank account number |
| 13 | src_wallet_level | Source Wallet Level | String | Source wallet level (1, 2, 3, 4) |
| 14 | dst_wallet_level | Destination Wallet Level | String | Destination wallet level (1, 2, 3, 4) |
| 15 | src_device | Source Device (MAC Address) | String | Source MAC address, format: XX:XX:XX:XX:XX:XX |
| 16 | src_ip | Source IP Address | String | Source IP address |
| 17 | dst_device | Destination Device (MAC Address) | String | Destination MAC address, format: XX:XX:XX:XX:XX:XX |
| 18 | dst_ip | Destination IP Address | String | Destination IP address |
| 19 | interval | Time Interval | Float | Time interval (seconds) between adjacent transactions within the same motif_id |
| 20 | hour | Transaction Hour | Integer | Hour when transaction occurred (0-23) |
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| Notes: |
| - Transaction Motif Types (transaction_motif): |
| * Normal transactions: single_transaction, normal_small_high_freq, regular_large_low_freq |
| * Abnormal transactions: class4_laundering, merchant_laundering, online_laundering, small_amount_testing (includes is_src_victim victim money laundering patterns) |
| - Transaction Modes (transaction_mode): |
| * single_transaction: Single transaction |
| * forward: Forward transaction (appears in pairs) |
| * fan_out: One-to-many transfer out |
| * fan_in: Many-to-one transfer in |
| * one_to_many: One-to-many (includes both transfer in and out) |
| * many_to_one: Many-to-one (includes both transfer in and out) |
| * many_to_many: Many-to-many (includes both transfer in and out) |
| - motif_id: All transactions sharing the same transaction pattern share the same motif_id, used for correlation analysis |
| - is_src_victim: Used to identify whether the source is a victim account in abnormal transactions (e.g., fraud scenarios) |
| - Device and IP Information: If a wallet does not have device/IP information at opening, it will be randomly generated during transactions |
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| ### III. Wallet Closure Module Attributes |
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| The wallet closure data file records relevant information when a wallet is closed, including closure time, closure channel, risk indicators, etc. |
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| No. | Attribute Name | Chinese Description | Data Type | Description |
| ----|-------------------------------|--------------------------------|-------------|------------------------------------------ |
| 1 | wallet_id | Wallet ID | String | Unique wallet identifier, corresponds to wallet_id in the opening module |
| 2 | zs_id | Closure ID | String | Unique closure record identifier, format: ZS000001, ZS000002, etc. |
| 3 | zs_channel | Closure Channel | String | Closure channel, such as: mobile_app, web, counter, etc. |
| 4 | zs_timestamp | Closure Timestamp | String | Format: YYYY-MM-DD HH:MM:SS, time of closure operation |
| 5 | wallet_open_tel | Opening Phone Number | String | Phone number used when wallet was opened (for correlation analysis) |
| 6 | is_zs_laundering | Is Abnormal Closure | Integer | 0 indicates normal closure, 1 indicates abnormal closure (money laundering related) |
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| Notes: |
| - Closure Time (zs_timestamp): Closure time should be later than the wallet's last transaction time |
| - Closure Channel (zs_channel): Identifies the channel through which the user performed the closure operation |
| - Abnormal Closure (is_zs_laundering): |
| * Priority marking for wallets that meet both conditions: is_abnormal=1 and participated in abnormal transactions |
| * Secondary marking for wallets that participated in abnormal transactions |
| * Tertiary marking for wallets with is_abnormal=1 |
| * Finally, select other wallets based on risk scores |
| - wallet_open_tel: Retains the phone number from opening time, used to analyze the historical account opening situation of phone numbers |
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| ### IV. Data Relationships |
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| 1. Opening Module and Transaction Module: |
| - Linked through wallet_id |
| - The src and dst fields in the transaction module correspond to wallet_id in the opening module |
| - The src_wallet_level and dst_wallet_level in the transaction module correspond to wallet_level in the opening module |
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| 2. Opening Module and Closure Module: |
| - Linked through wallet_id |
| - The wallet_id in the closure module corresponds to wallet_id in the opening module |
| - The wallet_open_tel in the closure module corresponds to wallet_open_tel in the opening module |
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| 3. Transaction Module and Closure Module: |
| - Indirectly linked through wallet_id |
| - Closure time should be later than the wallet's last transaction time in the transaction module |
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