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Retroactively Writing Account Key
If a Seeker performs a pairing through the traditional way (for example, through
Bluetooth settings) instead of through the Fast Pair entrypoint, there will be
no account key written into the Provider. In this case, the user will not be
able to see or use any of the Fast Pair features, despite owning a Fast Pair
device. To let users be able to get the benefits of Fast Pair, the Provider
shall allow the Seeker silently writing account key right after pairing has
occurred.
- If the Provider is bonded without going through the Fast Pair flow, allow a
new account key to be written through the Key-based Pairing method for up to
one minute. Only accept one account key to be written during this time.
- After the RFCOMM channel is established, the Provider should send the Model
ID and BLE address to the Seeker via Message Stream,
the Seeker will build GATT connection and start
Key-based Pairing procedure.
- If an Raw Request with Flags bit 3 set is received, the Provider
should verify the bonded device's BR/EDR address is the same as what is
included in the request. If not, reject the request.
- Because the devices are already bonded, BR/EDR bonding and Passkey
verification (steps 8 - 17 in the procedure) will be skipped
and the Seeker will directly write an account key to the
Provider after a shared secret is established.
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Last updated 2023-04-20 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2023-04-20 UTC."],[[["If a Fast Pair device is paired traditionally (e.g., via Bluetooth settings), it won't have Fast Pair features until an account key is written."],["Providers should allow Seekers to write an account key for up to a minute after traditional pairing using Key-based Pairing."],["This process involves the Provider sending its Model ID and BLE address, the Seeker establishing a GATT connection, and initiating Key-based Pairing."],["For security, the Provider verifies the bonded device's address before accepting the account key write request."],["Since devices are already bonded, the process skips some steps and the Seeker directly writes the account key after a shared secret is established."]]],[]]
