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Show HN: Coinwall, a bitcoin paywall

coinwall.co

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Re: Show HN: Coinwall, a bitcoin paywall

#21

Post by gbl08ma »

I built something like this into my URL shortener a long time ago ( http://tny.im/toll.php ). However, it is nowhere as easy to use, uses the Blockchain.info wallet APIs in a way they were never meant to be used, doesn't have automatic (nor automated) payouts and I'm not even sure that it still works. I never really advertised it seriously. Since nobody ever really used it, and because it's not the main purpose of the service (it has enough feature creep already...), I am considering discontinuating the feature.

If Coinwall becomes popular (and I hope it does) I'll be damned :)

Re: Show HN: Coinwall, a bitcoin paywall

#22

Post by AgentME »

dijxtra wrote: post #17

Excellent concept... but I could not use it. It says "To view 46 words of content, send exactly 0.00015612 BTC ($0.10) to 12smAWhdY9aMFyEenX6NLVZDend5WJgfVc". I paid with this transaction: https://blockchain.info/tx/047a379b7530f98876818540356b66964... And nothing happened, not even after 2 confirmations.

I payed it, it confirmed practically instantly, said "loading content...", and never got past that step. When I refreshed, a new paywall was in place asking for another payment.

Re: Show HN: Coinwall, a bitcoin paywall

#23

Post by adrianwaj »

marcell wrote: post #11
adrianwaj wrote: post #8

Cool. Good for Soundcloud or YT users that want to provide links to dl their content for a fee without requiring too much hoop-jumping. Even a way of locating some content just through the referral link would be nice... that way a user on their SC and YT pages can set a permalink, but provide the redirection addresses on coinwall. Or rather, coinwall could have a "Soundcloud/YT" referral url that the user fills in wh…

Yea, I was thinking of adding file upload support for music/videos is a next feature. Having support for Soundcloud/Youtube/etc. URLs is a neat idea and would make for an easy UX.

Another idea is to have a "set your own price" w/wo a minimum price, like with Bandcamp, where the download is like a post-donation gift. Also, once paid, the purchaser may want to be able to leave an email address or message to get further discounts in the future from the artist as VIP fans.

Re: Show HN: Coinwall, a bitcoin paywall

#24

Post by marcell »

rarestblog wrote: post #20
dijxtra wrote: post #17

Excellent concept... but I could not use it. It says "To view 46 words of content, send exactly 0.00015612 BTC ($0.10) to 12smAWhdY9aMFyEenX6NLVZDend5WJgfVc". I paid with this transaction: https://blockchain.info/tx/047a379b7530f98876818540356b66964... And nothing happened, not even after 2 confirmations.

Yes, excellent concept, but also did not work for me. Also attempt to refresh the page asks for another payment. In this moment of weakness you wish there was a "refund" button on BitCoin :)

Do you happen to have the transaction ID on hand for the failed payment?

Also, if you have a refund address, I can send the BTC back. It is a small amount, but still :)

Re: Show HN: Coinwall, a bitcoin paywall

#25

Post by marcell »

AgentME wrote: post #22
dijxtra wrote: post #17

Excellent concept... but I could not use it. It says "To view 46 words of content, send exactly 0.00015612 BTC ($0.10) to 12smAWhdY9aMFyEenX6NLVZDend5WJgfVc". I paid with this transaction: https://blockchain.info/tx/047a379b7530f98876818540356b66964... And nothing happened, not even after 2 confirmations.

I payed it, it confirmed practically instantly, said "loading content...", and never got past that step. When I refreshed, a new paywall was in place asking for another payment.

Do you happen to have the transaction ID on hand for the failed payment?

Also, if you have a refund address, I can send the BTC back. It is a small amount, but still :)

Re: Show HN: Coinwall, a bitcoin paywall

#26

Post by marcell »

dijxtra wrote: post #17

Excellent concept... but I could not use it. It says "To view 46 words of content, send exactly 0.00015612 BTC ($0.10) to 12smAWhdY9aMFyEenX6NLVZDend5WJgfVc". I paid with this transaction: https://blockchain.info/tx/047a379b7530f98876818540356b66964... And nothing happened, not even after 2 confirmations.

Did you get a "payment detected" message on the client side?

Also, if you have a refund address, I can send the BTC back. It is a small amount, but still :)

Re: Show HN: Coinwall, a bitcoin paywall

#30

Post by bowmessage »

Rygu wrote: post #19
marcell wrote: post #9

Earlier quoted context omitted.

No registration is required to pay or to make a paywall. Verification is done by assigning a slightly different payment amount to each person. For example, if you are charging 0.00015 BTC, the amount 0.00015001 and 0.00015002 may be used to distinguish two payments. These amounts are cycled every ~15 mins. Edit: Also, I may add support for BIP32 master public keys in the future. This would allow derivation of child p…

That is kind of confusing isn't it, because there's also a miner fee. Does your algorithm know how to subtract the miner fee to get the unique amount? Also, are your floating point operations (subtract, compare) done correctly? http://floating-point-gui.de/errors/comparison/

Anyone who uses floating point numbers in a bitcoin project is doing it wrong. Bitcoins have a fixed (for now) level of precision. 1 satoshi is currently the smallest discrete amount of bitcoin that can exist.

The miner's fee is separate from the amount sent, this is easy to distinguish.

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