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Show HN: Coinwall, a bitcoin paywall

coinwall.co

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Re: Show HN: Coinwall, a bitcoin paywall

#11

Post by marcell »

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.

Re: Show HN: Coinwall, a bitcoin paywall

#14

Post by jasonzemos »

I'm assuming the technology behind this is either of two things:

* An implementation of probabilistic nanopayments (https://en.bitcoin.it/wiki/Nanopayments)

* Massive amount of extremely small transactions.

I'd like to know if any consideration has been made for the amount of data hitting the blockchain when this scales. A flood of transactions will cause fees to rise higher than the principal payment.

Re: Show HN: Coinwall, a bitcoin paywall

#16

Post by nwh »

marcell wrote: post #15
jordanthoms wrote: post #13

Unfortunately bitcoin's potential for micropayments isn't so great at the moment, when the transaction fee is 5-10c.

It was lowered by 10x recently, to .5-.1c: https://github.com/bitcoin/bitcoin/pull/3305

It really hasn't been lowered. Most users aren't running the latest code, so you would struggle to ever get your transaction into a block that way.

Re: Show HN: Coinwall, a bitcoin paywall

#17

Post by dijxtra »

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.

Re: Show HN: Coinwall, a bitcoin paywall

#19

Post by Rygu »

marcell wrote: post #9
udfalkso wrote: post #3

Great concept. Experience still needs some work... How does the verification work? Do I have to register to verify that I've paid?

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/

Re: Show HN: Coinwall, a bitcoin paywall

#20

Post by rarestblog »

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 :)
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