TX ID is the randomly generated .HOW?

[maomao]

TX ID is the randomly generated .HOW? What is the relevant code?

[DannyHamilton]

I don't believe that the transaction ID is randomly generated.  I'm pretty sure it's a SHA-256 hash of the transaction itself.  Is there a reason you believe it's random?

[CIYAM]

What the OP might be referring to is that when a tx is "signed" a timestamp (or similar) is included - thus if you re-signed an identical tx it would not have the same tx id.

[DannyHamilton]

What the OP might be referring to is that when a tx is "signed" a timestamp (or similar) is included - thus if you re-signed an identical tx it would not have the same tx id.

Is this true? I'm not aware of a timestamp in the transaction.  If you re-sign an identical transaction I'd expect you'd get an identical transaction ID, no?

[CIYAM]

What the OP might be referring to is that when a tx is "signed" a timestamp (or similar) is included - thus if you re-signed an identical tx it would not have the same tx id.

Is this true? I'm not aware of a timestamp in the transaction.  If you re-sign an identical transaction I'd expect you'd get an identical transaction ID, no?

Can't verify this at the moment (am on holiday) but am fairly certain that I've done this with offline tx's before (i.e. signing the same tx twice and ended up with a different tx id the second time).