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Formatting

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bitcartel 2018-02-01 22:52:16 -08:00 committed by GitHub
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drafts/bitcartel-nu0-tx-format/draft.rst
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@ -69,6 +69,7 @@ A new version 3 transaction format will be introduced for Overwinter.
The version 3 format differs from the version 2 format in the following ways: The version 3 format differs from the version 2 format in the following ways:
* header (first four bytes, little endian encoded) * header (first four bytes, little endian encoded)
* overwinter flag : bit 31, must be set * overwinter flag : bit 31, must be set
* version : bits 30-0, positive integer * version : bits 30-0, positive integer
* branch id * branch id
@ -77,8 +78,8 @@ The version 3 format differs from the version 2 format in the following ways:
======== =============== =========================== ======= ======== =============== =========================== =======
Version Field Description Type Version Field Description Type
======== =============== =========================== ======= ======== =============== =========================== =======
>= 3 header flag: bit 31 must be set uint32 >= 3 header - flag (bit 31 must be set) uint32
version: bits 30-0 positive - version (bits 30-0)
>= 3 branch_id format branch id uint32 >= 3 branch_id format branch id uint32
>= 1 in_count varint 1-9 bytes >= 1 in_count varint 1-9 bytes
>= 1 tx_inputs list of inputs vector >= 1 tx_inputs list of inputs vector
@ -123,6 +124,7 @@ Pre-Overwinter parser:
* data begins with little-endian byte sequence: [0x03, 0x00, 0x00, 0x80] * data begins with little-endian byte sequence: [0x03, 0x00, 0x00, 0x80]
* deserialized as 32-bit signed integer * deserialized as 32-bit signed integer
* with hexadecimal value of 0x80000003 (most significant bit is set) * with hexadecimal value of 0x80000003 (most significant bit is set)
* decimal value of -2147483645 * decimal value of -2147483645
@ -130,12 +132,14 @@ Legacy parsers will expect the version to be a positive value, such as 1 or 2, a
Overwinter parser: Overwinter parser:
* data begins with little-endian byte sequence: [0x03, 0x00, 0x00, 0x80] - data begins with little-endian byte sequence: [0x03, 0x00, 0x00, 0x80]
* deserialized as 32-bit unsigned integer - deserialized as 32-bit unsigned integer
* with binary value of 10000000000000000000000000000011
* decomposed into two fields - with binary value of 10000000000000000000000000000011
* overwinter flag (bit 31) is set - decomposed into two fields
* version (bits 30 - bit 0) have a decimal value of 3
- overwinter flag (bit 31) is set
- version (bits 30 - bit 0) have a decimal value of 3
Overwinter parsers will accept the transaction as valid as the most significant bit of the header has been set. By masking off (unsetting) the most significant bit, the parser can retrieve the transaction version number:: Overwinter parsers will accept the transaction as valid as the most significant bit of the header has been set. By masking off (unsetting) the most significant bit, the parser can retrieve the transaction version number::