A few questions on creating a transaction

pebwindkraft

sr. member

Activity: 257

Merit: 343

yes and no ... Grin

yes: while creating your tx, you replace the sigscript with the pubkey script.
no: when signing the whole structure, you are doing a hash. As the unsigned, raw transaction has previous tx hash and previous outpoint, when you hash it, this creates always a different value, which makes the sig again being different for each input.

there is just a similiar question here:
https://bitcoin.stackexchange.com/questions/66714/is-scriptsig-different-for-each-input/66722?noredirect=1#comment77506_66722

nofiat

newbie

Activity: 19

Merit: 2

Quote from: achow101 on December 27, 2017, 11:30:34 PM

Quote from: nofiat on December 27, 2017, 10:14:27 AM

When creating the scriptSig, we sign the transaction hash using the spender's private key. Does that mean that the scriptSig is the same for all inputs? Or is the tx hash calculated separately for each input?

The hash is different for each input.

Quote from: nofiat on December 27, 2017, 10:14:27 AM

Also, is there a developers chat or group?

#bitcoin-dev on freenode.

In that case, what do we put in the final "hash" parameter of the transaction? Is it the double-hashed raw transaction before it's broadcasted?

achow101

staff

Activity: 3458

Merit: 6793

Just writing some code

Quote from: nofiat on December 27, 2017, 10:14:27 AM

When creating the scriptSig, we sign the transaction hash using the spender's private key. Does that mean that the scriptSig is the same for all inputs? Or is the tx hash calculated separately for each input?

The hash is different for each input.

Quote from: nofiat on December 27, 2017, 10:14:27 AM

Also, is there a developers chat or group?

#bitcoin-dev on freenode.

nofiat

newbie

Activity: 19

Merit: 2

Hi,

So I'm learning bit by bit on how to create a transaction (without using any external library).

When creating the scriptSig, we sign the transaction hash using the spender's private key. Does that mean that the scriptSig is the same for all inputs? Or is the tx hash calculated separately for each input?

Also, is there a developers chat or group?

Topic: A few questions on creating a transaction (Read 170 times)