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For now, just a node.js module called "sentiment". It just counts up positive and negative words. However, I'm stashing everything in S3 and mongo db, so I can go back and re-score everything once I implement a less naive approach.
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I've been working on a little app to monitor the twitter stream for tweets about a few coins, analyze the sentiment, and plot it on a graph over time. I've found it's best to get feedback early and often. If you have any, please let me know. http://cryptopredicto.herokuapp.com/ |
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There are a lot of alt coins, with new ones coming up every day. I don't have time to track them - which ones are interesting, which ones are experiencing a surge in price, etc - so I was wondering if there are any funds out there where I can just deposit some BTC, and the fund invests in new/good alt-coins looking to generate a profit. Does it exist?
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Do you know how instawallet was hacked?
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$5, sorry, just fixed that. I was originally going to do $10, but decided to go with $5 to try and strike a balance. I want it to be for beginner's, not an easy way to buy bitcoins with a credit card.
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I've been working on a book for Bitcoin beginners over the last few months, and had a lot of questions along the way. Thank you to everyone here who helped answer those questions, or took the time to review the book! If you're interested, it's available at http://www.bitcoinbeginner.com. If anyone here would like a free copy, pm me or email me - john@bitcoinbeginner.com |
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Things I would like it covering: 1) A good introduction to money and the implications of bitcoin for Economy, namely for a Anarcho-capitalism model of society. 2) A good introduction for assymetric encryption 3) Elliptic curves and Elliptic curves cryptography background, the role of ECDSA in bitcoin (Key-pair generation, Signature Generation, and Signature Verification) 4) Crytography concepts: hashing, National Security Agency, etc. 5) Satoshi paper in very digestible bytes 6) More computer power meaning more irrevocability. The scarcity and rarity being given by the hard coded timely fashion and not by the electricity and computer resources used. 7) Making it clear that coins only exist as balances associated with a bitcoin address and that what you actually keep are the private keys.  Explaining that a private key is like a password that enables you to spend from a bitcoin address, that is made of 256 bits, that is, 256 zeros and ones, but is usually expressed in more condensed formats using hexadecimal numbering. 9) Explaining that private keys and public keys form a pair like a key and a locker and that the bitcoin address is very much the counter-part of the private key, that it follows directly from the public key. But their mathematical properties are very particular because it is possible to calculate in some fractions of a second the bitcoin address, in a pair, from its private key. But the reverse would take countless millions, if not billions of years as it would have to be done by trial and error, even if quantum computers were used. 10) Going through a simple version of Satoshi client code, ultra well commented, with UML diagrams and all software architecture behind it, all very well explained and documented. A kind of "Satoshi's Original Bitcoin Client - An Operational View" on steroids!!! 11) Commons myths, FAQ, http://blog.zorinaq.com/?e=66http://coinlab.com/pdfs/a-bitcoin-primer.pdfhttp://blog.oleganza.com/post/32725987418/bitcoin-non-technical-faqAn inpiration, and 99% transpiration... Much much more. Making us all code and technical savvys!! This sounds great, but not what I would expect in a "for Dummies" book. |
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Do any of the exchanges to trades between alt-currencies?
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Ah thank you. Blocks solve the double spend problem. Should have occurred to me.
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Why not just send every transaction to every client?
Is it
- because transactions are only validated during the creation of a block?
- so that there is a way to generate new bitcoins?
- so that new clients don't have to download old transactions, just the block chain?
- something else?
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Been thinking about this, but ended up operating normally... as long as bitcoin it's not illegal what is the point?
If it becomes illegal in the future, or just attracts attention from govenments, they can review every transaction that has ever occurred. |
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It seems to me that people use Coinbase because they can buy bitcoins at 1% over Mt. Gox from their bank account. This beats (?) using Mt. Gox directly because of ease of use and no bank transfer fee.
Now when Coinlab takes over Mt. Gox, and the fee goes down (for US folks), what's the benefit to continuing to use Coinbase?
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Just wanted to say that I used this the other day after the post on hacker news. Worked out well, got paid out without any problems. Looking forward to seeing more games!
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Thanks everyone. The more I learn about Bitcoin, the more amazed I am at how well designed it is. I know it builds off of some previous work, but there's just so many little details in the system are so well thought out and future-proof that I'm convinced that "Satoshi" must have been a group of people, and not just one guy.
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I think I found my own answer: https://en.bitcoin.it/wiki/Technical_background_of_Bitcoin_addressesAn address is a hash of the public key, so when a recipient claims the coins in a future transaction they both provide their public key (which can be hashed to prove it links to the address) and they sign the previous transaction (which can be decrypted with the public key) to prove they're the valid owner of that address. Does that make sense, and is it correct? |
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I'm trying to wrap my mind about how transactions are secured. I've read through the wiki and I grasp how inputs/outputs work, I'm still confused about how signing does. This is a representation of a bitcoin transaction that I've seen all over the place:  Since, I believe, most transactions are sent to a bitcoin address so the recipient's public key is not known in advance, how does the recipient claim the coins? To use a reddit-ism, please explain it like I'm five  |
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I think at some point the exchange rate starts to sound silly. If I tell a friend that 1 BTC is worth $1,000 dollars, he's going to laugh at me.
I would say, just on my gut, that > $100 is tough to swallow psychologically.
Since all transactions are written in satoshis, could the clients just move the decimal place at some point?
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