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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Conditional bitcoin scripting

Just starting to learn bitcoin scripting. Can someone provide a basic example of a conditional opcode script? I currently test from the command line with bitcoind -regtest
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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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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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25 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
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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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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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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 ...
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37 views

Spend the coins of a given private key

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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Difference between bitcoin and digitalcoin

What is the difference between Bitcoin and Digital coin? Is there any paper related to Digitalcoin?
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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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41 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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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 ...
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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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29 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 ...
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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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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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Is there a way to check if a CTransaction is multisig from code?

I see GetP2SHSigOpCount and GetLegacySigOpCount in CTransaction, but I don't know if I use one of them. I want to check if a tx is multisig (has multiple outputs).
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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 ...
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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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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
37 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
46 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 ...
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1answer
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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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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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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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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
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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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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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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 ...
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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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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
55 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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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 ...
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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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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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50 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 ...
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1answer
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Ripple - how to properly set flags?

At the moment I'm trying to add flags to my custom Ripple transactions that I submit through JSON RPC. However, when I send my request: { "id":1, "method":"sign", "params":[ { ...
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How to schedule a bitcoin transaction?

I just wanted to know if you could schedule a bitcoin transaction. For example I want to send some BTC to someone exactly at 4:00 pm but it is 1:00 pm at my current place. Is that possible so that my ...
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Explanation of what an OP_RETURN transaction looks like

How is OP_RETURN used and why was it introduced in the first place?
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I sent bitcoin from my qt wallet while it was unsynced to another wallet, do i have to wait for it to sync?

it says it has not been broadcasted yet with 0 of 6 confirmations. My wallet is stuck on a block right now.
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Harvesting transaction fees

So let's assume I don't care about energy consumption and mining the famous reward for discovered block. Is it possible to set up a workstation optimized to harvest just the transaction fees? Do I ...
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Standard Transactions and relaxation rules

We all know that there 5 common types of Standard transaction scripts. My question is if we create a script under what rules is it decided if it standard or non-standard? Under the hypothesis that ...
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Blockchain and Bitcoin client difference of amount

I just made a transfer of 0.06 BTC, you can look it up on Blockchain.info The problem now is that my receiving client (Multibit) doesn't show those 0.06 BTC, it only shows 0.0001 BTC have been spend ...
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How to properly use PreviousTxnID in a Ripple Transaction?

At the moment I am implementing a transaction overwriting with NOPs in Ripple. I want to store information about a transaction I am overwriting inside of the NOP. Looking at the PreviousTxnID field it ...
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Bitcoins being sent to another addres during a transaction

I realized a few days back, that if I send some bitcoins to someone, then it shows in blockchain an extra amount sent to my own wallet. So if I send 0.5 BTC from wallet A to B then blockchain shows ...
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Can you assume that all inputs to a Bitcoin transaction are controlled by the same person?

When you are looking at a Bicoin transaction in the block chain and it has inputs from multiple addresses is it safe to assume that those addresses are all controlled by the same ...
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2answers
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What does it mean to have -1 confirmations?

I have -1 confirmations for an inbound transaction on my Electrum wallet. What does is it mean to have -1 confirmations?
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Can a Ripple Transaction Sequence have gaps?

I am wondering whether a Ripple Transaction with a Sequence number that ships over a few numbers from the previous Sequence number be accepted as a valid transaction in the Ripple Network? For ...
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1answer
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Are there any tools to visualize where the transactions are coming from and going to?

We spent some time doing the visualization of the transaction flow between bitcoin wallets https://bitviz.visalyze.com and wanted to know if there are any tools that can not only track, but also ...