TODO

Support of various cryptocurrencies
- Bitcoin
- Bitcoin Cash
- Monero
- Dogecoin
- Ethereum
- Litecoin
Admin backend
- See total earning
- See latest transcations
- See all invoices
Send coins to another wallet periodically
- Optionaly, send them through a coin mixer
Convert any fiat price to any supported crypto
Generate invoice as PDF
Payment site
- Show product data
  - Title
  - Price
  - Image
  - Quantity
- Website should either set the wanted cryptocurrency in advance or the user is free to choose
- Success and cancel URL
- Sessions
- Payment should be still available after completion

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