/shared2/wc24/nwc24fl.bin
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Description
/shared2/wc24/nwc24fl.bin contains the friend list, ie. the Wii Message Board's address book entries.
File structure
| Start | Length | Description |
| 0x000 | 4 | Magic (0x5763466C = "WcFl") |
| 0x004 | 4 | Unknown |
| 0x008 | 4 | Maximum friend entries (max_entries) |
| 0x00C | 4 | Number of friend entries |
| 0x010 | 48 | Padding |
| 0x040 | max_entries * 8 | Friend Codes |
| 0x360 | max_entries * 320 | Friend list entry[100] |
The start address of the friend list entries (0x360) is only correct if max_entries=100.
The Friend Codes themselves are not stored in ASCII, they are just numbers. The "-" signs (as in 1234-5678-0555-0148) are only displayed to enhance readability.
Friend list entry
| Start | Length | Description |
| 0x000 | 4 | 0x00000002 if E-mail. 0x00000001 if Friend Code. |
| 0x004 | 4 | 0x00000003 if declined. 0x00000002 if confirmed friend. 0x00000001 if unconfirmed. (E-mail is always 0x0001) |
| 0x008 | 24 | Nickname (Unicode) |
| 0x020 | 4 | Mii ID |
| 0x024 | 4 | System ID |
| 0x028 | 24 | Reserved region |
| 0x040 | 96 | Friend Code or Email |
| 0x0A0 | 160 | Padding |
The nickname length could be limited to 10 characters as well, just like the nicknames of Miis. A maximum length of 10 characters would imply another unknown four bytes long value right before the Mii ID.