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Diffstat (limited to 'taler-nfc-guide.rst')
| -rw-r--r-- | taler-nfc-guide.rst | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/taler-nfc-guide.rst b/taler-nfc-guide.rst index e610b4c1..374dc53c 100644 --- a/taler-nfc-guide.rst +++ b/taler-nfc-guide.rst @@ -117,9 +117,9 @@ The GNU Taler wallet uses the AID (application identifier) ``F00054414c4552``. The ``F`` prefix indicates the proprietary/unregistered namespace of AIDs, and the rest of the identifier is the hex-encoded ASCII-string ``TALER`` (with one 0-byte left padding). -During the time that wallet is paired with a reader, the communication channel is stateful. +During the time that the wallet is paired with a reader, there is state associated with the communication channel. Most importantly, the first message sent by the reader to the wallet must be a ``SELECT FILE (=0xA4)`` that selects -the GNU Taler AID. +the GNU Taler AID. Messages that are sent before the correct ``SELECT FILE`` message result in undefined behavior. The reader sends commands to the wallet with the ``PUT DATA (=0xDA)`` instruction, using the instruction parameters ``0x0100``, denoting a proprietary instruction. |