One of the reasons for using Stellar is because it lowers the fees taken by others like PayPal, Venmo, etc. I personally won't pay a 5% fee because it eliminates the value proposition of using Stellar in the first place.
StellarPay - Shopify Merchants Can Now Accept Stellar Payments
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With New Update Checkout v2 is Live! Here's What's News
- New price engine which is offering real market prices for XLM / Fiat currency conversation (There is no more high volatility protection thanks to your feedbacks)
- 8 new Fiat currency added (EUR,GBP,JPY,CAD,SGD,HKD,DKK,NZD)
- New redesigned Checkout client is now fully embeddable into your Shopify store
- Checkout page is now supports to show multiple products and shipping fee
- Multi-currency stores are fully compatible right now
- SEP - 0007 support added (https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0007.md)
@kehaar We're not taking any fee from customers or merchants. It was a fixed conversion rate to protect merchants from volatility. With new update StellarPay is converting FIAT->XLM with real market prices. It means there is no more +5% fixed conversion rate. Thank you for your feedback.
7 days later
Is there a place where I can try the interface?
You may be interested in supporting CosmicLinks as well (similar to SEP-0007), as it'll give you access to more wallets, including hardware wallets (Trezor support being added right now).
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MisterTicot Hey, demo is available at https://checkout.stellarpay.io/demo
Cosmic.link support added too. If everything is okay about it (waiting your feedback), I will add it to live version too. Trezor support would be awesome.
Your interface looks great!
I like the way you embedded Cosmic.link. If you want, I can provide an alternative style for better integration.
I have a couple of comments about StellarPay interface:
The footer is breaking the layout on my display (1366x768, chromium), you can fix it by removing the -15px margins from the .row class and adding max-width: 100%;.
For SEP7 requests with memo, you need to define the memo type as AFAIK the standard doesn't define a default: &memo_type=MEMO_TEXT.
Beta Trezor support will be released the 28th. Payments are already fully functional.
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I released a test version for the Cosmic.link widget: https://test.cosmic.link/widget.html. I think it will better fit your interface, isnt't it?
Worth noting, this is possible to host the widget on your own domain by forking the (test) repository at https://github.com/MisterTicot/cosmic-plus-testing.
MisterTicot Thank you. I fixed the layout issue and put your test version into the demo. New test version layout is much better than default one for Checkout.
I just added Trezor support to it.
I still plan to public release all those things the 28th.
stellarpay Pretty nice interface!
https://cosmic.link/widget.html is ready to get integrated into your live version, with functional Trezor payments.
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MisterTicot 
Thank you for Trezor update. I put 2 button for Trezor and Ledger signing methods to keep simplicity. But can't find set signing method on query specification document of Cosmic.link. If possible can you add "method" argument to select specific signing method? So new final URL will be like for trezor
cosmic.link/widget.html?type=payment&network=public&memo=m3r7t1k1n2x&destination=GTHISISDEMOADDRESSDONOTSENDANYTHING&amount=12345.6789&method=trezor
Ledger :
cosmic.link/widget.html?type=payment&network=public&memo=m3r7t1k1n2x&destination=GTHISISDEMOADDRESSDONOTSENDANYTHING&amount=12345.6789&method=ledger
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I confirm that this is not possible at this time - I never thought about doing it this way. Indeed, this is an interesting idea.
I think I need a bit of thinking to find a nice way to integrate it. In any case, I'm planning a major redesign of the interface starting next month so that's the right time to bring new ideas.
Note that by removing the basic Cosmic.link, you loose a number of use cases:
- Using Stellar Authenticator & other wallets to use Cosmic.link in the future.
- Using private key with Stellar Laboratory.
- Using wallet that only accept an XDR as input.
- Signing with phone using QRcodes - for example someone using SEP7/keybase on the phone but browsing the shop on desktop computer. This is a rather common situation as computers are more comfortable for browsing but phones are often more secure to store secrets keys.
Could you elaborate what would be the expected behavior when Ledger/Trezor buttons gets clicked?
MisterTicot Actually I need that method query on URL because of the Trezor's pop-up window mechanism. When you choose Ledger option you're still able to use other signing methods too but Trezor makes things bit complex and buggy. Choosing default signing method before reach to Cosmic.link is only thing what I need.
Ok then I'll give it a try.
Isn't it possible to talk directly to the hardware without going through their high-level API pop-up?
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There's probably a way, but probably not an easy one given that using their "high-level" API already feels like reverse-engineering... I chose to do the best I could without spending an unreasonable amount of time on a feature only a few will use.
That's also the reason why I didn't implement Node.js support: I have no clue how it is supposed to be done.
stellarpay Are you the issuer of the XLB and USDT assets on the DEX? Can users actually withdraw USDT? What is XLB used for?
istrau2 Weird question! I never mentioned about XLB and USDT assets in my posts and website. So Im not issuer of those assets. You are running an exchange and you can easily verify it (domain difference) via their Stellar.toml file before ask in here.
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stellarpay I didn't mean it in a negative way. I can see the difference in domains but I was just not sure if both domains were owned by you or not. It sounds like not.
No offense intended. Apologies for any negative connotation.