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Final changes to remove undecided parts of the draft

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str4d 2021-03-19 11:28:50 +13:00 committed by GitHub
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@ -44,27 +44,14 @@ contents of a memo. It does not define consensus requirements.
+ strip any trailing zero bytes
+ decode it as a UTF-8 string (if decoding fails then report an error).
+ If the first byte has a value of 0xF5, then the reader MUST:
+ Interpret the next few bytes (1 to 9 of them) as a 64-bit unsigned variable-length
integer [#Bitcoin-CompactSize]_, and use it as an arbitrary application-defined
"type" field.
+ Interpret the next 1 or 2 bytes as a CompactSize value constrained to the range 0..510, and use
the resulting value as the length of the remaining data.
+ If 1 + the number bytes used for the type field + the number of bytes used for the
length field + the length > 512 then report an error.
+ Inspect the padding after the end of the indicated length, and if it
contains anything other than bytes of value 0x00 then report an error.
+ Return to the caller a 3-tuple of the following data:
+ the type — an integer in :math:`[0...2^{64})`
+ the length — an integer in :math:`[0...510)`
+ a byte string of that length that contains the payload
+ If the first byte has a value of 0xF6, and the remaining 511 bytes are 0x00, then the user
supplied no memo, and the encrypted memo field is to be treated as empty.
+ If the first byte has a value of 0xF6, then the user supplied no memo, and the encrypted
memo field is to be treated as empty.
+ If the first byte has a value between 0xF7 and 0xFE inclusive, then this memo is from
the future, because first byte values of 0xF7–0xFE are reserved for future
specifications of this protocol.
+ If the memo matches any of these patterns, then this memo is from the future, because
these ranges are reserved for future updates to this specification:
- The first byte has a value of 0xF5.
- The first byte has a value between 0xF7 and 0xFE inclusive.
- The first byte has a value of 0xF6, and the remaining 511 bytes are not all 0x00.
+ If the first byte has a value of 0xFF then the reader should not make any other
assumption about the memo. In order to put data into a memo field that does not use the