Timeline for When generating witness for bip143, how do you choose WHAT outpoint to use?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Jun 15, 2021 at 23:05 | vote | accept | noone392 | ||
| Jun 15, 2021 at 23:05 | comment | added | noone392 | Thank you guys a ton for the help. I am not sure it would be possible to come up to speed without just reverse engineering the core if it wasn't for the experts spending their time. | |
| Jun 15, 2021 at 22:46 | comment | added | Ava Chow♦ | @noone392 Yes, if your transaction has two inputs requiring witness signatures, then there will be 2 witness signatures. hashPrevouts will include all of the outpoints, but in order for a sighash to apply to a specific input, the outpoint for that particular input is included explicitly. This example only has 1 witness sighash because there is only 1 witness input which I did not notice earlier. | |
| Jun 15, 2021 at 22:39 | comment | added | Pieter Wuille | I think Andrew missed that the first input isn't a segwit output, so it doesn't use BIP143. In this case, for the second input, the output you substitute is the output being spent in the second input. | |
| Jun 15, 2021 at 21:28 | comment | added | noone392 | so then you would have to have 2 witness signatures, each with with the hashPrevouts including ALL the inputs? Also that example doesn't appear to have 2 sighashes, that example clearly only has one?is this example incorrect? | |
| Jun 15, 2021 at 21:20 | history | edited | Pieter Wuille | CC BY-SA 4.0 |
deleted 1 character in body
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| Jun 15, 2021 at 20:51 | history | answered | Ava Chow♦ | CC BY-SA 4.0 |