Edit: Testing is done for now. Thread will be locked This thread is for testing my android app for this forum. The project thread is here: https://bitcointalk.org/index.php?topic=1195830.0I will be making test posts which, if everything goes as it should, show appear in this thread. If not, then they should appear in Project Development. If those posts do not show in this thread, I will be deleting them. When I am done testing, this thread will be deleted. Mods, if this is against the rules, please let me know. This is probably in the wrong place, but I can't create a self-moderated thread in meta, so I am making it here. This thread is self-moderated to prevent other people from spamming this thread. ABSOLUTELY NO ONE EXCEPT MYSELF IS ALLOWED TO POST IN THIS THREAD!!! |
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You should always wait for at least 1 confirmation on an incoming transaction before spending it. This protects against double spends and the current transaction malleability attack. You should also send transactions with a decent fee so that it actually gets confirmed. How much was the fee on the transaction that you sent?
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I have no clue how this happend or what to do. I searched my address on blockchain and this was above my address with red font "Warning! this bitcoin address contains transactions which may be double spends. You should be extremely careful when trusting any transactions to or from this address" What should/can i do?? The amount was really low, but i'm really scared to send money to anyone now  And can anyone please explain to me what double spending is? There appears to be an attack on the network that is exploiting transaction malleability. What is happening is that someone is modifying transactions so that the id changes but the actual payments stay the same. This is what makes it look like there is a double spend because the same inputs are spent but the txids are different. Don't worry, the warning should go away after one of those transactions (both spend to the same place) is confirmed. Just don't send transactions that spend unconfirmed inputs. |
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How much is the bounty?
How much is the bounty and should we use your project ? because I don't know C & C++ honestly so not going be able to use it however I may use C# AND GIVE IT a shoot .
Bounty is 200$ , that is not my project but it is a very good code to hack. you can go ahead and try with C# . https://github.com/znort987/blockparser/blob/4920bba202c648e83abade4a756edab03526524e/util.cpp#L248// Output script commonly found in block reward TX, pays to explicit pubKey
if(
likely(
65==script[0] && // OP_PUSHDATA(65)
0xAC==script[scriptSize-1] && // OP_CHECKSIG
67==scriptSize
)
) I will try this using java and bitcoin core rpc if that is ok with you. Unfortunately I'm no good at c++ so I cant modify blockparser |
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I did not receive the payment. |
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I'm asking if the Bitcoin's transaction hashes are random or can be calculated ?.
A transaction hash is the hash of the transaction. A "hash" is a computation that is done on data and results in a value that has useful properties, including relative uniqueness, the appearance of randomness, and an inability to recreate the original data. In Bitcoin, transaction hash = SHA256(SHA256(transaction)) So ? can it be calculated OR NOT  Like if you give me your btc address and i wanted to send you 5$ But i want to know AND CALCULATE the tx hash before sending the payment to you is it possible ? If you are sending the bitcoins, then you are creating the transaction, so you can know the hash after you create the transaction, but before it is published. But if you are the only one that knows the details of the transaction, then you are the only one that can know the transaction hash before the transaction is published. Edit: is there anything that i cant know the results of it only after i send the Bitcoin payment ? No once you create and sign the transaction, you know everything about it and can calculate the hash nothing else is learned street broadcasting it. |
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Hashes of the same data are always the same. However, the data inside a transaction is not always the same. A transaction includes a signature, which includes random numbers thus the data is not always known so the hash cannot be calculated without actually creating and signing a transaction.
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Are your time zone and system clock set correctly (to within 30 seconds)? They need to be for Google Authenticator (or anything using the same protocol) to work.
I was so positive that you were correct and that it was silly of me not to check this, but after changing the time and testing I still get different codes. Tails will automatically sync with TOR time, so I've gone into time and date, changed it to both the exact time (within 3 seconds) and tried setting my location and turning it to 'network time' and neither helped the situation. Foxpup : I have already tried that app a long with every other 2fa I could find. None spit out the correct codes. I had had this same issue on a ubuntu install which the time was correctly synced, so that would lead me to think that it is not a time issue? Though not 100% positive. I will up the bounty to .3 btc if anyone can get it working in tails. You will need to start with a root pass and sudo apt-get install chromium and then change your network proxy settings to 127.0.0.1 port 9050 to get chrome functional with a internet connection. Have you tried the extension I posted? |
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I did not get paid so far - when do you send payments?
We've not been paid yet - the campaign period only ended yesterday. I'm surprised that the spreadsheet has already been updated (quick work, izanagi!) - I imagine we'll get paid either today or in the next few days. I saw last couple of couple of weeks members got paid quite fast and now again same issue is it? I don't know - it seems way too early to be thinking that, the campaign period only ended yesterday. Yeah the campaign was ended yesterday,i wish today is payment,so payment was made by wangxinxi right? maybe we should waiting for him The OP says that we may need to wait for up to a week before getting paid. |
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If I have 100 Potential Activity in how many time and how many post to transform in Activity?
Or To have the TOTAL activity that I can get with an account, I have to sum potential with normal activity?
If you have 100 potential activity, then the most activity you can have at that time is 100. With 100 potential activity, then if you have 100 or more posts, your activity will be 100. If you have less than 100 posts, then you can keep posting and your activity will go up until it reaches 100. After that, you will need to wait for the next two week period to increase your activity. |
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Thanks for that.
It's actually moved to 19 now so it's put my mind at rest.
Anyone know how big the blockchain is?
At this time, the blockchain is around 40 Gb. It will only get larger, so the more recent you are, the more data there is that Bitcoin Core needs to process. |
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I cannot understand what do you mean by 'sending messages through your bitcoin wallet to another wallet.' Clarify further, please.
My knowledge of how bitcoin works is slightly limited..
those that might hold or send messages could be rewarded somehow in a network (wallet), if that network that transferred messages was also a wallet that holds bitcoins, then the wallet would also be some sort of encrypted communication system/device. or not?
What you are saying still does not make any sense. If you are looking for a p2p messaging system based on bitcoin, then check out bitmessage. |
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Helllo i read somewhere in next months the bitcoin maybe have some changes , my questions! what exactly are XT core ? the difference ? if the changes will be done , will be different from now the old bitcoin core , wallet.dat etc ... will work or all need update ? so sorry my english crap i know.
Bitcoin XT only implements bip101 which is for maximum block size increase. Nothing else changes. can please also tell me how much RAM i need for run bitcoind full node on windows 1GB it good ? and how much GB of traffic require a month ?
thanks in advance for the reply Help a nob !
1gb of ran is not enough. You will need at least 4 if not more. |
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bitcointalk.org is SMF 1.x. That's not going to work. submitThisOnce doesn't make the post. Just send an HTTP POST in the same way that the form does. Note that you need to pass a valid session key as "sc" (which the form does via a hidden <input>). Thanks. I will try that. |
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Are there any virtual bitcoin debit cards that I can get if I am in the US?
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Isn't this basically a pyramid scheme? After you run out of depositors, the whole thing collapses because there is not constant money flow to continue to pay out the older depositors.
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not possible. many people have tried to come up with solutions to prevent people from stealing bitcoin, but it is not possible. How exactly would you be able to link a private key to a person digitally? It cannot be done. Instead of focusing on making it impossible to spend Bitcoin from stolen private keys, you should focus on making it impossible to steal them in the first place. That is much easier to do.
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If you record the transaction id at purchase, then you will know which addresses sent the Bitcoin to pay for it. To prove that the person really did buy something, then you can ask them to sign a message with one of those addresses to prove themselves. The only problem is with exchange wallets like coinbase which don't give users control of the private keys so they can't sign anything.
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