Next, The sender is determined by the first input in the tx. So you can fund the tx from several address if needed, however only the first input in the tx will signal to the Omni protocol who is sending the Omni Assets.
The receiver is chosen/indicated by the last output address that is not the sender. So if you want to send any extra btc change back to yourself or to a different address specify those first.
Signaling The receiver address only needs a fraction of btc, right now we're using 0.00005460 btc as that 'reference output amount'.
I found something relating to this in the code just yesterday - thank you for breaking it down in details!
I will give a try to simply sign the payload you provided. Thank you!
Amazing Thank you for that builder, I didn't find it
