Feature/Improvement: A buyer scans Sell-Offer.psbt (1x vin / 1 vout) coin inputs and change vout needs to be added #32
Description
A potential buyer of a NameOp or NFC scans an already partially(!) signed Sell-Offer (PSBT) with one NameOp-Input and one Output for the Seller with the required price!
When this is scanned by a DOIWallet
- check signature exists and is valid from NameOp-VIN
- add coin input from own wallet which is sufficiently paying the requested amount in the first output
- add change output
- display PSBT QR-Code
- broadcast to Doichain Network
- Test Segwit and Legacy