Transactions are signed messages regarding the transfer or generation of bitcoins. They are broadcasted through the network and, if accepted, integrated in the blockchain.

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Accepting 0-confirmation transactions and detecting double-spends with open source solution

I would like to accept 0-confirmation bitcoin for very small amounts. I am happy to accept zero-confirmation spends and am aware of the risks. However, the tool needs the ability to "flag" the ...
0
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1answer
90 views

Why is the address 1MAdS7aPszWG4EYgBpbF9mnGUi5ChbMu8d sending me Bitcoins?

I'm receiving 1 satoshi today from an odd address. This account has been very consistent in creating spammy transactions that distribute 1 satoshi to a lot of account. Any one know what's going on ...
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2answers
40 views

How do Bitcoin transactions work, and what does one need in order to send or receive one?

I am trying to understand how Bitcoin works and whether it is possible to manage a bitcoin transaction anonymously. If someone transfers a bitcoin, what do I need to sign it with? Can it be signed ...
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1answer
23 views

How to set a payment in Ripple without specifying currency issuers?

I want to send IOUs from one of my accounts to another through the use of the API. Both of the accounts trust the same IOU issuer, which is a separate address. According to the Transaction Format, I ...
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2answers
20 views

What's the minimum transaction with nxt?

Currently the minimum transaction on Bitcoin is 5430 Satoshi, and what about NXT?
3
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2answers
190 views

Why do transactions with lower input age require higher fees?

I am trying to understand how bitcoin fees work. I have understood well why transaction with many inputs require higher fees but I can't figure out why transaction spending virgin bitcoins would ...
2
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3answers
54 views

Inevitable dust spam

Given I have an account with balance 1BTC + 1 satoshi. I want to transfer 1BTC to another account and tribute 0.0001 BTC out of that 1BTC to the network as fee. Would my transaction being rejected for ...
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1answer
28 views

Can zero-fee txs get into a block?

What happens if a transaction is set to have zero fees? Can it get into a block? Also, if you updated a coin's code to accept zero-fee transactions, would this cause a hardfork? (e.g. made tx's in ...
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1answer
39 views

Blockchain.info automatic transaction

On Sep 17 I wanted to transfer 0.001 BTC from one Blockchain.info account (bitcoin address 1BFFtYPgtaZUHujDqiehqSseZvuUzJQxki) to another Blockchain.info account (bitcoin address ...
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0answers
20 views

Getting all transactions that ever occurred for a bitcoin address

I know you can use various APIs to get the balance for a given bitcoin address, but is there a way to total all the bitcoin that were ever received at a given address? A so-called "transaction ...
2
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1answer
53 views

Can't connect Electrum to a Network so that I can receive my bitcoins

I've looked everywhere for an answer but can't find the right one for my situation. I'm using the linux based tails OS with persistent setup with my electrum wallet. Everything works fine and LBC ...
2
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2answers
80 views

Can an output be spent in the block in which it is contained?

Is a Bitcoin block containing both a transaction that funds an output, and another transaction that immediately spends the same output, allowed by the protocol? Does such behavior occur "in the ...
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1answer
80 views

How long does it take for a transaction with 0 fees to be confirmed or rejected?

I have a problem with a transaction that has 0 btc fees: https://blockchain.info/tx/256301465d77affb6bc7087432a9130db48dd64efa28b0460fb674eda704f382 From what I understand, eventually this ...
2
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2answers
44 views

theoretical: mining without transactions

As fas as I know, mining means verifying transactions and thus keeping the bitcoin network alive. Today at a local meetup, some people have informed me that mining doesn't need transactions. They said ...
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0answers
20 views

Are transactions containing zero-value output accepted by miners?

Would miners generally accept a transaction that has one of its output values set to zero? Can the acceptance in this case depend also on the scriptPubKey associated with the zeroed output?
2
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1answer
79 views

Bitcoin payout based on real-life event

Just starting to learn bitcoin scripting. Can someone explain how to pay out based on some real-life event? I currently test from the command line with bitcoind -regtest
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1answer
31 views

How does the receiver of a transaction check the whole chain of ownership?

While reading Satoshi Nakamoto's paper on how bitcoin works, I got stuck on #2. In a chain of transactions, how can someone who has received the coin check the whole chain with just a signed hash of ...
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0answers
18 views

How to detect a rejected transaction?

If the nodes I connect to don't support the BIP 61 reject message, how do I know that my transaction was eventually rejected by the network (e.g. due to my bugs)? Is there any timeout or whatever ...
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1answer
48 views

Get a JavaScript notification when Bitcoin transaction arrives to a certain address

I'd like to implement a very simple address monitoring feature on a site I'm working on. I'd like to just be able to say "Listen to this address on the testnet for money to come in", and update the ...
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2answers
24 views

Are time, timereceived and blocktime in UTC?

I read around about the differences between time, blocktime and timereceived, but one question remains. Although I assume all times are UTC, I haven't seen that mentioning specifically anywhere. Does ...
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1answer
28 views

How are transactions efficiently distributed to network nodes before inclusion within blocks?

How does the bitcoin core efficiently distribute transactions so that they are added to node transaction pools to be inserted into a future block? I understand that each bitcoin node has a list of ...
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2answers
57 views

if the cap is 21 million bitcoin does this mean that there will be only 21 million transaction ?

so as the tittle says , and if I got right , a bitcoin is given to the first miner who got the right hash , so with 21 million cap does this mean the limit of transactions is also 21 million ...
2
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2answers
52 views

How do I spend Bitcoins from a specific address?

What's happening when I use importprivkey? Are the coins merged to my existing private key or is the new key added to my wallet? I want to import a private key, receive funds on it, and send the same ...
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1answer
58 views

Tie Breaking in bitcoin transaction

If two nodes broadcast different versions of the next block simultaneously , some nodes may receive one or the other first. In that case, they work on the first one they received but save the other ...
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1answer
52 views

solo mining payout maturity vs pool mining

When I mine in pools there are unconfirmed coins, but it seems unconfirmed times are far less than immature status in *coind wallet app... Any advice how I can get my coins quicker instead of waiting ...
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1answer
42 views

What is the maximum number of multisigaddresses you can create? [duplicate]

I have created a few multisig addresses, and just tried to create a 2 of 3 address, but it returned with the 'AddCScript() failed' error. What is the maximum number of m-sig addresses and where is ...
3
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2answers
53 views

What's an efficient model for redistribution of coins between wallets?

Let's say I have 50 addresses which have an average of 0.5 BTC. Some have two or three times the average balance, while others have less than 0.1% of the average. Many times per day an address is ...
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36 views

Transaction schedule

I`m thinking about building a business with a friend of mine. The business would use bitcoin as its primer currency, because we expect most of the transactions to be rather small amounts of money (1 ...
2
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1answer
60 views

Transactions within orphaned blocks

Scenario: You are running a bitcoind node and listening to the incoming blocks/transactions. You receive TX 1 which is put into your mempool. Block A is mined, and includes TX 1, which is ...
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1answer
26 views

To transact an amount less than minimum transaction amount

Lets consider minimum bitcoin transaction amount is $10 and is it possible to send an amount which is less than $10?
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Problem receiving - confirmations stuck?

I have tried to transfer some btc being a first time user from one wallet to another (both online version). It seems the btc was sent but the receiving wallet is still showing '0' 24 hours later. ...
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0answers
25 views

How can one know which money exchanges happen in Ripple?

In Ripple, money can be exchanged in two ways: a payment is sent from a person to another person 2 satisfying offers fulfill each other The Ripple wiki states When an offer is placed it will ...
0
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1answer
34 views

How many transactions in One Block?

Block is collection of transactions.Who can decide Number of transactions per block? and How transactions are selected in block? and How does the priority works for fee transactions? Thanks
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26 views

multiple parties to sign a transaction before being broadcast (or after, but either way be associated with)

Lets say someone was writing a transaction solely to denote the existence of something, or a timestamp, or writing something in OP_RETURN Could that transaction be signed by other addresses, kind of ...
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1answer
90 views

How to sign bitcoin transaction with 'bitcoind' and non-bitcoind-wallet private key?

My Target I want to create and sign bitcoin transactio using 'bitcoind' and 'bitcoin-cli' only. But the private key is unrelated to 'bitcoind' built-in wallet. That is, private / public key pair was ...
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1answer
57 views

How to calculate multisig address?

Given the transaction below, how can I - Identify this tx involves multisig What tool/s can I then use to calculate the resulting multisig address The second HEX address ...
2
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1answer
28 views

On quering the blockchain, can someone read what transaction took place? [closed]

Like considering the Alice Bob ex where Alice is the customer and Bob is the merchant. If Alice and Bob signed a contract where alice will pay bob on the delivery of a service. The transaction took ...
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1answer
55 views

How/when are transactions removed from the not-confirmed pool?

I am not clear as to how the removal of transactions from the non-confirmed pool happens. I have not found any descriptions explaining how the process works. Here are the scenarios as I see them: ...
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1answer
49 views

Three numbers after dash in transaction id

In Bitcoin Core the transaction id is appended with a dash and three numbers. They are usually 000. What do those numbers mean? For example: ...
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1answer
36 views

Include checksum in a transaction

Is it possible to include a file's checksum in a transaction? Not necessarily in Bitcoin's current blockchain due to the now limited OP_RETURN feature, but just in the blockchain/transaction concept ...
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3answers
31 views

Difference (if any) between proof-of-work in mining bitcoin vs verifying transaction

I'm trying to understand the proof-of-work idea for verifying a transaction. I think I understand why proof of work is needed to verify transactions (essentially to prevent spoofing/double spending ...
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2answers
45 views

What is the maximum number of output addresses I can send to with one bitcoin transaction?

I'm looking to make a faucet website, but was wondering what is the maximum number of output addresses one can send to with one bitcoin transaction?
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1answer
46 views

Is it possible to create a transaction with 2txin and 2txout?

Is it possible to create a transaction with 2txin and 2txout? If it is possible, then how does one sign this transaction? Or do I have to create two separate transactions? 1txin 1txout and 1txin ...
4
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2answers
78 views

What's the point of trading BTC if you're limited in the things you can buy

If you're trying to make a profit by trading BTC... fine, I get it. What other reasons are there to trade BTC?
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0answers
31 views

Is there an API that provides this functionality?

Sorry I couldn't make my title more descriptive, but it might be a little long winded. What I need is the following, and preferably an API that can support the popular crypto currencies, not just ...
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1answer
56 views

Is it possible that someone forks the chain?

I'm not sure I understood everything but all the clients always keep the longest chain, ok. So, what happen if an evil person inject bad transactions in a block and successfully mine it (given the ...
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1answer
60 views

Confirmation limit

When seeing transactions I see that the number of confirmations keeps increasing without any limit. I wanted to know if there is any time limit on including a already confirmed transaction in a block ...
0
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1answer
25 views

Bitcoin-qt transaction not initiated by the wallet owner

I was just mining for some Dogecoins with Eobot and parallel I had BGFminer set on solo mining + 4 pools from eclipse. The issue is that the moment the Eobot kicked in (it started on mining Dogecoins ...
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1answer
30 views

I cannot see the expected OP_CODE in transactions

According to different answers on this site the format of the standard TX claim script should be [OP_PUSH DER(R+S)+HashType OP_PUSH PubKey] The OP_PUSH code is 4C, 4D or 4E depending on push length. ...
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1answer
74 views

How to send money using blockchain API?

I am not very familiar with php but I just want to know how this works. I am trying to use the blockchain API to send some money for testing purposes but the transaction isn't taking place. My current ...