Create Crypto Checkout to initiate a checkout session. After creation, merchants can present payment information in two formats:Get Convertible Cryptos to obtain the list of supported cryptocurrencies and display their networks and checkout addresses.Create Crypto Checkout Link to generate a payment link for e-commerce checkout pages.Generate POS Payment Request to display a scannable payment QR code on POS devices.Crypto Checkout Wallet Connection to establish wallet authorization.Crypto Checkout Webhook upon transaction completion.Close Crypto Checkout to terminate pending checkout sessions.