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Add transaction expiry value into transaction digest

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str4d 2018-01-10 10:44:56 +01:00
parent 35854f6a8c
commit 2a4f012692
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GPG Key ID: 665DBCD284F7DAFF
1 changed files with 15 additions and 6 deletions
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21
drafts/str4d-overwinter-sighash/draft1.rst
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@ -69,9 +69,10 @@ A new transaction digest algorithm is defined, but only applicable from the Over
3. hashSequence (32-byte hash)
4. hashOutputs (32-byte hash)
5. hashJoinSplits (32-byte hash)
6. nLocktime of the transaction (8-byte little endian)
7. sighash type of the signature (4-byte little endian)
8. If we are serializing an input (ie. this is not a JoinSplit signature hash):
6. nLockTime of the transaction (8-byte little endian)
7. nExpiryTime of the transaction (8-byte little endian)
8. sighash type of the signature (4-byte little endian)
9. If we are serializing an input (ie. this is not a JoinSplit signature hash):
a. outpoint (32-byte hash + 4-byte little endian)
b. scriptCode of the input (serialized as scripts inside CTxOuts) [TODO]
c. value of the output spent by this input (8-byte little endian)
@ -99,7 +100,7 @@ Semantics of the original sighash types remain unchanged, except the followings:
Field definitions
-----------------
The items 1, 6, 7, 8a, 8d have the same meaning as the original algorithm. [#wiki-checksig]_
The items 1, 6, 8, 9a, 9d have the same meaning as the original algorithm. [#wiki-checksig]_
2: ``hashPrevouts``
```````````````````
@ -137,7 +138,12 @@ The items 1, 6, 7, 8a, 8d have the same meaning as the original algorithm. [#wik
* Otherwise, ``hashJoinSplits`` is a ``uint256`` of ``0x0000......0000``.
8b: ``scriptCode``
7: ``nExpiryTime``
``````````````
The block height or time at which the transaction becomes unilaterally invalid, and can never be mined.
[#ZIP-tx-expiry]_
9b: ``scriptCode``
``````````````````
[TODO: TBC]
@ -145,7 +151,7 @@ The items 1, 6, 7, 8a, 8d have the same meaning as the original algorithm. [#wik
* For ``P2SH``, the ``scriptCode`` is the ``script`` serialized as scripts inside ``CTxOut``.
8c: value
9c: value
`````````
An 8-byte value of the amount of ZEC spent in this input.
@ -218,6 +224,8 @@ Refer to the reference implementation, reproduced below, for the precise algorit
ss << hashJoinSplits;
// Locktime
ss << txTo.nLockTime;
// Expiry time
ss << txTo.nExpiryTime;
// Sighash type
ss << nHashType;
@ -291,3 +299,4 @@ References
.. [#01-change] In the original algorithm, a ``uint256`` of ``0x0000......0001`` is committed if the input
index for a ``SINGLE`` signature is greater than or equal to the number of outputs. In this ZIP a
``0x0000......0000`` is commited, without changing the semantics.
.. [#ZIP-tx-expiry] ZIP???: Transaction expiry