GRSPay

GRSPay is a free and open-source cryptocurrency payment processor which allows you to receive payments in Groestlcoin with no fees, transaction cost or a middleman.

GRSPay is a non-custodial invoicing system which eliminates the involvement of a third-party. Payments with GRSPay go directly to your wallet, which increases the privacy and security. Your private keys are never uploaded to the server. There is no address re-use, since each invoice generates a new address deriving from your xpubkey or zpubkey.

GRSPay is available at https://grspay.com

Tutorials:

Changelog  v1.4.7.0
• UX/UI: Easier onboarding
• UX/UI: New navigation
• Greenfield: Add a missingPermission field to 403 errors
• Support for new TLS version of SMTP server
• Greenfield: Added field "StoreId" to a Payment Request
• Greenfield: Can create a payment request without specifying currency (would then use store's default currency)
• Add login code, for easy login to GRSPay Server via a mobile device
• Add LNUrl Auth support as second factor auth
• Batch unarchive invoices
• Ability to bump fees of transactions and invoices via CPFP
• Add ability to add description to pull payment
• Greenfield: Can add store guest/owner to a store
• Plugins: Expose file service
• Plugins: Allow writing Greenfield API endpoints

Features
• Direct, P2P Groestlcoin payments
• Lightning Network support
• Complete control over private keys
• Enchanced privacy
• SegWit support
• Process payments for others
• Payment buttons
• Point of sale
• No transaction fees (other than those for the crypto networks)
• No processing fees
• No middleman
• No KYC
• The software is built in C#
• You can run GRSPay as a self-hosted solution on your own server or use a our host. The self-hosted solution allows you not only to attach an unlimited number of stores but also become the payment processor for others.
• Open Source - MIT license

This application is licensed under MIT. There is no warranty and no party shall be made liable to you for damages. If you lose coins due to this app, no compensation will be given. Use this app solely at your own risk.

Source code: https://github.com/Groestlcoin/btcpayserver