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2answers
86 views

Can the Bitcoin blockchain eliminate the need for Trusted Computing in Smart Contracts?

Let me preface this by saying that I'm a novice, but this is my rough understanding of how Bitcoin's blockchain works. (This is largely based on blog posts like this one.) If person A wants to ...
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0answers
19 views

Could PageRank be adapted to calculate credit ratings?

PageRank is a measure of the popularity of a page within a network of pages. A credit rating is a measure of the popularity of a trader within a network of traders. So could PageRank be adapted ...
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0answers
37 views

Are there already several ways to do “smart contracts” with cryptocurrencies?

I have heard a lot of "buzz" about Ethereum, but apparently its 1.0 version won't be released for a while yet. I have heard a lot of talk about "smart contracts" from people who admire Szabo, but I ...
4
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1answer
65 views

Is it possible (in some way or other) to expire a txout?

I read Contracts: Will this be possible? where part of the question related to expiring a transaction and one of the replies said that it would never be possible since it causes problems. ...
2
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1answer
44 views

Is there any way to send an output to a script which can then only be sent to one of two addresses?

Is the following scenario possible? I want to send money to a script. This script will require knowing a private key to spend, as usual, but the script is only valid if the money is being sent to one ...
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1answer
61 views

Given that contracts can be formed in the blockchain using scripts, couldn't a contract include a mechanism for facilitating chargebacks?

While I understand that chargebacks, or the lack thereof are an important feature for encouraging merchants to adopt bitcoin, the reverse may be true for consumers. There is probably a balance to be ...
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0answers
7 views

How can I make repeating transactions over a given interval? (time, blocks, or times replayed?)

I want to make a recurring payment that is enforced by the blockchain and the scripting engine. If I have the following fixed source address, funded with 100 BTC 16UwLL9Risc3QfPqBUvKofHmBQ7wMtjvM ...
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0answers
45 views

Does Amit Sahai's indistinguishability obfuscator enable Autonomous Virtual Corporations or “Agents”?

Given that an "Agent" is described as Agents are autonomous programs that maintain their own wallet, which they use to buy server time. Money is obtained by the agent selling services. If demand ...
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4answers
219 views

Are There Examples of Asset Backed Virtual Currencies?

Here is a very natural idea: an entity creates a new virtual currency with the following properties: Only that entity has the capability to issue new quantities of that currency That entity makes ...
2
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1answer
47 views

Could I mine a non-final transaction?

I know that non-final transactions (locktime in future and sequence number < MAX_UINT) are not "accepted by miners". However, I could not figure out the exact behavior. If I mined my own block ...
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2answers
328 views

Where are contracts used in the real world

I'd be interested to see some examples of Bitcoin contracts used right now. Websites that provide escrow services. Smart properties. Trading of contracts. Oracles. Or are they not really in use ...
0
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1answer
45 views

Would it be possible to make Trophys / Achievements from bitcoin experience

One Trophy could be: "First output signed" And many more milestones on the road to the more advanced usages of the network: "First multisign/multispend", "First completed ANYONECANPAY transaction" ...
6
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1answer
352 views

How to 'attach' metadata to a bitcoin receive address

I need to generate a receive address that is directly associated with some metadata, M, that forms part of a verifiable contract. I require that customers can verify that an address really was ...
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3answers
460 views

Hedging against the bubble popping - where's the leverage?

My friend has a rather large store of bitcoins that he bought about a month ago. I think it makes sense for him to hedge his recent gains, since the price run up looks like a bubble. What is a high ...
4
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1answer
180 views

Is Ripple's Contract language intended to be Turing complete or sub-Turing complete ?

The wiki seems to imply Turing-completeness because no restrictions on jumps are specified here https://ripple.com/wiki/Contracts#Foundational_Ops. Which is it and what (if any) is the actual ...
4
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3answers
375 views

Is there a listing of strange or unusual scripts found in transactions?

I'm studying scripts and am looking for strange or unusual scripts that have appeared in any of the *coin networks..(outside the standard ones listed on this page) Is any one person, or website ...
1
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1answer
127 views

In a given contract, should the “LockTime” timestamp include an extra hour for confirmations to prevent a double spend?

Anytime a transaction has a timestamp attached to it, and there are signed but not submitted transactions at play, shouldn't the holder of the non-submitted tx have to take into account the ...
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2answers
512 views

Bitcoin contracts. Are there good examples in the blockchain?

I have been checking the Bitcoin wiki for script and Bitcoin contracts and I have some doubts about advanced contracts. For instance, I have seen in many places references to password controlled ...
4
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1answer
587 views

Using Bitcoin contracts to run a betting site without the need for deposits?

There are a couple of bitcoin betting sites, but they all seem to require making a deposit with them. Is it possible to somehow use the Bitcoin contract system to establish a distributed betting pool? ...
3
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1answer
183 views

Contracts: Will this be possible?

I would like to know if this will be possible with Bitcoin: Create a key with the following features: Only be able to spend btc if a % of pre-definied keys allow it The own of the key need for ...
9
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1answer
438 views

How do I implement an escrow service using Bitcoin contracts?

I can see that Bitocin can provide escrow contracts. https://en.bitcoin.it/wiki/Contracts#Example_2:_Escrow_and_dispute_mediation Can someone provide a worked example or even better a pointer to a ...