2019-06-17 18:27:55 +00:00
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# Trezor Protocol
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2017-08-15 15:47:05 +00:00
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## version 1
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Messages are sent in packets of 64 bytes.
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First packet has the following structure:
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| offset | length | type | contents |
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|--------|--------|-------------|---------------------------------------------------------------------------------------|
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| 0 | 3 | char[3] | '?##' magic constant |
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2021-09-27 22:42:28 +00:00
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| 3 | 2 | BE uint16_t | numerical [message type](messages.proto#L76) |
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2017-08-15 15:47:05 +00:00
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| 5 | 4 | BE uint32_t | message size |
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| 9 | 55 | uint8_t[55] | first 55 bytes of message encoded in Protocol Buffers (padded with zeroes if shorter) |
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Following packets has the following structure:
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| offset | length | type | contents |
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|--------|--------|-------------|----------------------------------------------------------------------------------------|
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| 0 | 1 | char[1] | '?' magic constant |
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| 1 | 63 | uint8_t[63] | following bytes of message encoded in Protocol Buffers (padded with zeroes if shorter) |
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