It is quite convenient if your crypto wallet is installed on a mobile device. In this case, you launch the app, scan the QR code on a computer screen with a camera, and then the cryptocurrency receiver address is typed in the app automatically. You do not need to copy anything and waste time.
To do this, you must have a payment acceptance method configured through PayCryptos, called “Invoice”.
In this case the rate gets “frozen” for 5 minutes, and the countdown begins. During this period of time, the payer must make a cryptocurrency transfer to your account which is converted into fiat later by the fixed rate.
Blockchains are constantly being improved and are getting faster. Currently, Solana is the fastest blockchain among the supported options. The transactions are carried out almost immediately.
In this case, it all depends on which blockchain the sent cryptocurrency functions.
If it is Bitcoin or Litecoin, the transaction is irreversibel. If it is an Ethereum-like system, you can try accessing it; contact the support service of the site where you made the payment.