Questions tagged [transactions]

This tag should be used for questions related to transactions. Transactions are signed messages regarding the transfer or generation of bitcoins. They are broadcast throughout the Bitcoin network and, if accepted, integrated in the blockchain.

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3
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2answers
614 views

Where do the majority of Bitcoin transactions take place?

I'm new to Bitcoin and am trying to wrap my head around where and when bitcoins are used. I understand that Bitcoin is accepted by a lot of legitimate websites (now reddit, wordpress, etc) for ...
6
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1answer
529 views

Where can I learn more about BIP30; namely the exploit and the background discussion?

I'm having trouble understanding the bug that was fixed in BIP030, and how it would be exploited. Is the premise of this attack that there would have to be a netsplit and the chain was forked, then ...
0
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0answers
51 views

How Long for a transaction? [duplicate]

Possible Duplicate: How to debug a long “0/unconfirmed” status in the bitcoin client? I have sent a transaction to btc-e and 3 Hours later still no love I thought there was 6 new blocks per ...
8
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1answer
6k views

How is a Transaction ID generated & when does it change? (with a new sequence ID?)

I'm creating a non-mainstream client that processes and validates Bitcoin transactions and need to track transactions in my database. How is the TxID generated and when does it change? ...
9
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4answers
1k 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 ...
-3
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1answer
338 views

Can a new wallet receive money that was sent to it before the wallet was created? [duplicate]

Possible Duplicate: What would happen if two public keys had the same Base58 hash? A follow up from What happens if I mistype the address when making a payment? Suppose I accidentally (or ...
11
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2answers
4k views

Transactions with a wait time (using nLockTime)

I'd like to know if there are transactions that can only take place at some predefined moment. In principle, it should be possible to use the parameter nLockTime to wait for a particular block number: ...
3
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1answer
595 views

When does Blockchain.info show 127.0.0.1 as “first relayed by” for a transaction?

Does this mean the transaction had to come from a Blockchain.info/wallet user (or perhaps someone using Blockchain.info/pushtx)? Or could this indicate something else (e.g., a node from Tor even)?
9
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3answers
2k views

Can I buy or sell with bitcoins offline?

Is it possible to buy or sell something using Bitcoin, in an offline mode? In other words, if I had my wallet on my mobile phone and I wanted to send or receive money from another Bitcoin user who ...
3
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1answer
193 views

Tracking payments sent to scammers, and what they do with the money

I am interested in tracking payments sent to known scammers, and tracing where that money goes. Is there any website that compiles this information and shares it with others?
1
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0answers
111 views

Constructing (a Type of) Multi-party Transaction

I am looking to construct a raw transaction with the following properties: n addresses (call them a) input at least b BTC each. n addresses (call them a') may claim up to b BTC each as output. No ...
7
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4answers
508 views

How is it possible that transactions can be added to a block currently being mined?

It seems counter-intuitive that the current block can be hashed and transactions can be added to it, however that is what this thread indicates. Can someone help me connect the dots (not necessarily ...
5
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1answer
121 views

Verifying transation inputs

I have a question about practical implementation of one part of Bitcoin protocol. I'm reading the Protocol Rules for Bitcoin - "tx" messages and point 14 states that "For each input, if the ...
11
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2answers
2k views

How many bitcoins have been sent to Base58-invalid addresses?

Some bitcoins have been permanently lost when they are sent the the following addresses. The explanation I've found is that they contain characters that are invalid in Base58 ...
4
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1answer
2k views

Debug.log : How do I analyze an orphaned transaction?

The debug.log for my machine lists the following information while synching ERROR: FetchInputs() : 5b5e32cc97 mempool Tx prev not found e99babf87a stored orphan tx 5b5e32cc97 (mapsz 414) received: tx ...
4
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1answer
624 views

Does it make sense to “collect” smaller transactions balances into a single account during low activity?

My understanding is that it's possible for extra bitcoins to be left in several accounts within my wallet. The scattering of these coins into different accounts may cause future transactions to ...
3
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3answers
556 views

How many transactions have been included into the blockchain?

This website shows the number of bitcoin transactions per day, but I want to know how many there are total. How can I do this?
9
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2answers
8k views

Is it possible to view others' transactions in bitcoin client?

This seems like a really basic question, but I'm having trouble searching for answers on it. My understanding is that my bitcoin client (Bitcoin v0.7.1-beta) has basically theoretically downloaded the ...
2
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1answer
751 views

How does bitcoin handle unspent outputs from fresh transactions?

I read that Satoshidice uses one of the outputs from the bet transaction to fund the response transaction. Can anyone provide explanation/reference to how bitcoin handles such transactions. What is ...
4
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1answer
715 views

Password-based bitcoin transactions

I have been reading about the role of script in transactions and I gather it should be possible to do a Bitcoin transfer to a receiver who knows a password. Instead of checking an address, the script ...
4
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1answer
203 views

How to use Bitcoin software

I just downloaded Bitcoin on ubuntu and started as per the instructions in the README file. But, cannot understand the terms "Label", "Address" or any other for adding a new address or sending ...
4
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3answers
450 views

Alternative uses for last five decimal places of an individual Bitcoin (0.000xxxxx)

At the current conversion rates only the first three decimal points of an individual Bitcoin can be exchanged for a USD equivalent. e.g. 0.002 BTC equals 2 USD cents. That opens up possibilities for ...
5
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1answer
506 views

How many different destinations can a single transaction have?

I am building a web-app that needs to send money to different customer's addresses. I would like to minimize transaction costs and avoid unnecesary traffic, therefore I would like to pay all of them ...
6
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2answers
2k views

How do I send a transaction directly to a miner or pool for processing?

I am interested in sending a transaction directly to a miner or a pool for processing. I have general familiarity with Bitcoin-QT. What additional knowledge and steps must I have in order to send a ...
7
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1answer
4k views

Bitcoin C# .NET API

I am trying to get the address the bitcoins were last owned by or the "from" address, I know that if you send bitcoins back to that address not in all cases will the user actually get them but I still ...
14
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1answer
9k views

How does the wallet work, online and offline?

I've been reading about bitcoins and I've come across a few questions: How does the wallet actually work? From what I can gather, I use the wallet as a centralized service to store recieved coins, ...
8
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1answer
793 views

Is there a reason SatoshiDice & BitLotto use 0.00543210 BTC, and not 1 satoshi, to customize pay-to addresses?

SatoshiDice and BitLotto allow players to customize where winnings are sent by including an extra 0.00543210 BTC payment to the desired address as part of the entry transaction. Is there a technical ...
8
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2answers
1k views

Which is the reliability of a transaction timestamp?

Just one question. Where and how is the TIMESTAMP of a transaction generated? Is it reliable to develop a transactions notification system? Thank you! (I mean the time node below) { "hash":"...
11
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2answers
7k views

How to make free transactions?

I have to send a small amount 0.00001 btc to someone. The client requires a fee of 0.0005 btc (much more than the amount). This seems absurd. There should be a way to send coins for free, as mentioned ...
8
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2answers
563 views

How can an online system detect coins sent to its offline (cold) wallet?

Say, for security reasons, that a bitcoin business has an online wallet (aka hot wallet) with enough coins for day-to-day operations. The rest of the funds are in an offline wallet (aka cold wallet or ...
6
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2answers
447 views

Is it possible for a decentralized currency to have untraceable transactions?

I have been reading a bit about Bitcoin recently and am fascinated with the project and think it has great potential. However, one thing I think it needs in order to gain mass popularity is to make ...
5
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3answers
3k views

when I send money from my wallet, which address shows up as “sender”?

I have not yet sent money to anyone. I was wondering if there is any way to control which address shows up in the block chain as the sending address. Say I receive money on addresses A, B, C. I want ...
3
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1answer
2k views

Blockchain.info Receive Payments API problem

I am building a little online app to accept bitcoin payments in my website. I have a blockchain.info wallet and I am following their Receive Payments Api, which can be visited here: http://blockchain....
5
votes
1answer
624 views

What is the reputation of bitfloor?

It seems that bitfloor is a well designed trading platform, and a competitor to MtGox. However, the trading volume is low. How long has bitfloor been in business? Have there been any negative ...
4
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1answer
2k views

What is the structure of blk001.dat and blkindex.dat?

Can anyone tell me where I can read about the structure of the files blk0001.dat blk0002.dat blkindex.dat I know that in these files bitcoin is saving all the information about transactions. I ...
26
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4answers
38k views

What is a double spend?

What is a double spend? As someone who uses Bitcoin, what do I need to know about how the Bitcoin system prevents double spends? Are there still circumstances where they can occur?
35
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2answers
16k views

What is a Finney attack?

What is a Finney attack? Extra points for explaining its purpose, the prerequisites for it to be possible, how the attack can be performed and the origin of the name "Finney attack".
2
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2answers
3k views

Is it possible to earn BTC by processing transactions?

Where does the money go? Is it possible for any person to setup his wallet application to process transactions and make some more BTC?
9
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3answers
495 views

How can I assure my consumers they are actually paying the correct person? (prevent MITM attacks)

There are many network level attacks that give someone Man in the Middle ability to replace my Bitcoin address with their own. Since there is no way to cancel a transaction, and the best practice ...
3
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1answer
4k views

What does a Bitcoin transaction consist of?

I gather that 2400 transactions fit into a 1 MB block. That's 436 bytes per transaction record. But what's in a transaction record? Is there a good Powerpoint presentation that describes how Bitcoin ...
6
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2answers
979 views

Receiving bitcoins without open client?

If I am planning to accept bitcoins, does my client need to be running? Can I simply give out my public key and open the client later to receive? Does it depend on the client (I use MultiBit)? ...
1
vote
2answers
759 views

Balance still not available?

I just sent bitcoins from one wallet to another to make my life easier. This was the goal, anyway. My balance in my new wallet went up, but it's still not available after 3 hours. Why might this be? I'...
2
votes
2answers
2k views

Does blockchain.info show all transactions?

My client is still syncing, so I've been checking my transactions on blockchain.info. It only shows two transactions although I know I should have more than that when I search my address. I'm new to ...
1
vote
2answers
287 views

how http://blockchain.info/, http://blockexplorer.com/q or http://www.bitcoinmonitor.com/ works [duplicate]

Possible Duplicate: How can I read information from the blockchain? Can anyone tell me from where exactly sites like http://www.bitcoinmonitor.com/ http://blockchain.info/ can't post more ...
5
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2answers
591 views

What is the legal money range for a bitcoin transaction?

What is the legal money range for a bitcoin transaction message ? I am guessing that the lower limit is one satoshi but what about an upper limit aside from the maximum block size constraint ?
6
votes
1answer
261 views

Vouching for (or against) the reputation of a bitcoin user

Since it's possible to link non obfuscated transactions to a "user" does is make sense, or it is possible for anonymized users with an established transaction history to "vouch" for another? I'm ...
4
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2answers
12k views

Transfering Money From My Bank Account To Bitcoin? [duplicate]

Im quite confused about this bitcoin software/system. I have successfully sync'd to the network (took hours) and have recieved my address. Now, if someone is selling something for 5Bitcoins. What is ...
5
votes
1answer
612 views

How can one use multi signature transactions/addresses to improve the security of their services?

Multi signature transactions and addresses are heralded to be a good way to improve security of various Bitcoin services. However, how should one go about using them in order to achieve that goal? For ...
2
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1answer
352 views

How was the overflow bug of 2010 detected? Should UINT64_MAX value transactions be considered suspicious?

The overflow bug of 2010 was a result of a client that summed two values together and reaching INT64_MAX instead of UINT64_MAX. Should transactions of INT64_MAX (or any similar constant) be treated ...
4
votes
1answer
4k views

What is a transaction's step-by-step life cycle?

I'm trying to understand a transaction's lifetime and haven't yet found a technical, linear "timeline" of events that occur when a P2P transaction occurs. This is my understanding so far; please ...

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