Questions tagged [confirmations]

Confirmations correspond to the number of blocks that are dependent on a given transaction. This includes the block containing that transaction and all blocks after it in the blockchain. The more confirmations a transaction has, the more likely is it that it will remain in the blockchain permanently.

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Custom bitcoin confirmation process

I am implementing a payment module for bitcoins. I have the following case. I need customers to be able to pay in bitcoins. But for some reasons I cannot use existing solutions like Bitpay. ...
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How to increment the number of confirmation of a transaction? [duplicate]

Sorry for this naive question, but honestly it is going to be a great help for me. Say I am tracking a specific bitcoin transaction('TX_1') form bitcoin core. A confirmed block had the transaction ...
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How to know whether my transaction is fraudlent after one confirmation?

Let's say if the transaction tx_1 has one confirmation. But the tx_1 is fraudulent. Can it be rolled back? Here I am storing the confirmed blocks and if my transaction is in the block-1 then the ...
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Why are Bitcoin transactions sometimes confirmed instantly if blocks are mined every 10 minutes?

I have a basic question on Bitcoin and blockchain: Sometimes transactions are confirmed almost instantly, but there should be a new block every 10 minutes, so how is it possible? A transaction can be ...
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Meaning of confirmation within n blocks? [duplicate]

I have a hard time understanding the meaning of below sentence: "To confirm within 48 blocks, a transaction fee of 1 satoshi/byte is required." I have 2 questions here: 1) Does this mean that the ...
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Does total size of the transaction affect confirmation time?

Suppose one pays 1 satoshi/byte for their transactions. Will the confirmation of the two transaction below be different? A) a transaction of 1 inputs and 1 output (~192 bytes) B) a transaction of ...
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How can low latency and high scalability be achieved with increased block size in BTC?

One of the solution to address low latency and high scalability in BTC is to increase block size. A single block takes 10 min on average for proof-of-work. Increased block will also take same time for ...
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784 views

BlockChain scalability: How does BlockChain process multiple parallel transactions?

I just did some introductory research into blockchain technology and this is a breakdown of my understanding of how it works: Scenario: Assume Trump wants to send Obama 5 bitcoins. As soon as this ...
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ways to improve bitcoin tx finalization time

On GDAX website, they claim that 3 confirmations is needed to finalize your tx in. I assume they've done thorough research on this and might've come up with some logic to protect themselves from ...
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When we're calling `getrawtransaction` how does Bitcoin-core calc and verify confirmations?

if a transaction has 10 confirmation, does bitcoin-core check if the txid exists in the last 10 blocks? or its calculated based on transaction block number?
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Confirmations in block and trasaction

From the bitcoin RPC, both gettransaction and getblock returns a confirmation number in their response, are they always the same? Is there a case a transaction's confirmations isn't the same as its ...
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Checking pending (not yet in the blockchain) transactions

Is there a service (like Blockexplorer) that shows pending transactions that have not (yet?) been included in the block chain?
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Is it possible to run a miner to confirm transactions for a target address?

If I want to make a bitcoin transaction I need to wait 3-6 confirmations for my transaction to be accepted (by say an exchange etc) Is it possible to run a miner so that it is listening out for ...
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Is every bitcoin transaction (eventualy) validated by every miner? [duplicate]

I can see that my bitcoin transfers becomes real when my exchange detects 2 or more confirmations. I believe each confirmation is a validation. Am I correct? If so, How many confirmations will have ...
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How can a block regarded as confirmed in bitcoin?

I am a little confused with confirmation mechanism in bitcoin PoW consensus. According to bitcoin wiki: After a transaction is broadcast to the Bitcoin network, it may be included in a block that ...
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How does SatoshiDice operate with 0 confirmations?

I understand they use your bet as an input, but what does that mean and how do they do it? Can they use the standard bitcoind as a server against which to run the API from?
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Confirmed Transaction

If a transaction gets a minimum of 3 confirmations, does that mean that the BTCs have reached the destination address? I have a case where the transaction has gone through multiple confirmations but ...
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Why maturity rule on coinbase tx requires too many confirmations w.r.t an arbitrary tx?

For an arbitrary tx, it is often said that 6 confirmations is sufficient. However, maturity rule states that coinbase tx can't be spent until it receives 101 confirmations. Why do we have this ...
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Will a Litecoin LTC transaction with a low fee of .001 confirm?

Will a low fee of less than .001 ltc confirm using the coinomi wallet? And if it doesn't how long do you have to wait for it to return the coins back to you?
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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 ...
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How does confirmation exactly work?

When user A sends Bitcoins to user B, user A signs the transaction with his private key. This signed transaction is being sent to the Bitcoin network and all the nodes collect, confirm and pack these ...
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Why did my Coinbase transaction take 4.5 hours to get in a block?

Why did this transaction take so long to be put in a block? I initiated a 7 BTC transfer at 6:13 PM Eastern Time from Coinbase to an external address in an over the counter transaction today. It was ...
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Bitcoin deposit stuck 0 confirmations high confidence/low priority [duplicate]

hi i have a deposit stuck in the blockchain im not understanding why, its been stuck for 7 hours now without any confirmations, what is the explanation behind why the transaction is stuck? https://...
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How to get my unconfirmed transaction to confirm. Stuck for 30 days [duplicate]

My coins were sent with low fees by bitclub advantage. Due to this, the transaction is marked on blockchain as 'unconfirmed transaction'. I have tried to get the sender to reverse the transaction or ...
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A Simple Question: Which blockchain (or ledger) do we query as a client?

As far as I know, every full node has a copy of the ledger (or its view) stored locally. A Generic Question: Which blockchain (ledger) do we query as a client? In my question query is a generic ...
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How long must I wait for a 15 sat/B transaction to be confirmed or dropped by the network? What else can be done? [duplicate]

I know my question will likely be marked as a duplicate, but I do not see how to apply that answer in the case of a Ledger Nano S wallet. Doesn't using the Bitcoin wallet software require downloading ...
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Bitcoin Transaction never confirmed even with a significant fee? [duplicate]

I just had some questions in regards to relating fee/byte to confirmation. From an exchange the withdrawal fee for bitcoin is fixed to 0.0005 btc but the bytes vary very much, and thus you get very ...
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How do I know how many confirmations a transaction has?

This is my first transaction and it's been since yesterday that I sent it. The website said wait for 4 confirmations then check email, but I haven't gotten any email so I don't know if it's gone ...
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Verifying that a transaction is in the blockchain

Let me first start off by saying im just learning about blockchain and the technical aspects. From my understanding, each transaction is cryptographically hashed, the hashes are paired and hashed ...
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Bitcoin transaction with 0.0001 BTC fee not getting confirmed? [duplicate]

I sent the following transaction a few hours ago with Bitcoin-QT: https://blockchain.info/tx/b5682b48484a8752be62c6b4036eaf8a8f005d9ea75cbff434476b7506a9e3a2 And the transaction still has not been ...
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Why are transactions taking so much longer in the last few days (2017-10-29)

I noticed that in recent blocks there has been lots of transactions that has been waiting for as many as 3 days. For example, just randomly picking a block 492200, which was produced on 2017-10-29 ...
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Can a low fee unconfirmed transaction prevent confirmations of following transactions?

To be more precise, consider the following situation: Address A gets an input of 4 BTC. You try to make a transaction from A to B with 1 BTC and a very low fee, which means its unconfirmed for a long ...
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Speeding up bitcoin transactions?

I am writing an app which trades bitcoins and one of the biggest problems I have run into is that it takes so long to move them from one wallet to another. I thinks it due too mtgox and other sites ...
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As a solo miner how can I prioritize my own unconfirmed transactions?

Is it possible to prioritize my own unconfirmed transaction through my mining machines without being in a pool? And if its possible how can I do that?
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What are Green Addresses?

What are Green Addresses? Is it true that they can solve the "confirmation delay" problem, and how does that work? Are there any drawbacks?
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Negative time estimation from estimatefees + mempool data

I am currently writing a time estimation tool for Bitcoin, and it gives me wrong estimations, so I am not sure if it's accurate and if I am not doing some error in logic. For example, I have this ...
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Fee Paid vs Confirmation Time

I there a graph correlating fee size and confirmation time? A graph where I can see the fee paid by transactions which got confirmed in less than 20 minutes. Is there a graph like that?
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Bitcoin-Qt wallet shows outgoing transaction as “Offline (0 confirmations)”

What is the meaning of a transaction status of "Offline (0 confirmations)" as opposed to "Unconfirmed (0 confirmations)" ? Does it mean that the transaction has not even been sent to the network yet? ...
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How Long to Verify Payment?

I wish to allow people to purchase items at my shop using bitcoin. I've heard however that blocks take 10 minutes on average to process and transactions may not even be processed in the next block if ...
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What happens if I spend a bitcoin that has 1 confirmation?

Take these two transactions that happen one after the other: Transactions: 1) Exchange A -> (1 confirmation) My Wallet 2) My Wallet (With a high fee) -> Exchange B (needs 20 confirmations) ...
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How many confirmations will Bitcoin core wait before I can send my coins out?

Using Bitcoin core 0.14, how many confirmations do I have to wait before I can send the coins out? Is there a method to wait X confirmations before sending coins out from specific addresses that have ...
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With 100% segwit transactions, what would be the max number of transaction confirmation possible on a block?

With 100% segwit transactions, what would be the max number of transaction confirmation possible on a block? And, how many utxo can be updated by a block full of segwit transactions?
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Who decides who verifies Alice's transaction?

Let's say the transaction got picked up into a block by miner A and into a block by miner B. Both are working on those separate blocks, and each block contains information about Alice's transaction ...
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Spending own generated unconfirmed change in the v.0.9.0 era

Reading about spending own generated unconfirmed change some time ago I stumbled upon this reddit thread that convinced me that doing so is a really bad idea and could prove catastrophic for any ...
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What factors determine how long confirmation takes?

Simple question... What are all the factors (all of them!) that determine how much time X number of confirmations of a transaction takes?
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How does transaction confirmation work through mining process? [duplicate]

Hi i am just a newbie in this thing but there is something i can not understand if blockchain keeps every transaction in it and creating a new block to blockchain takes so much time then doesn't it ...
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Creating An Altcoin: How to Lower or Increase Confirmation Times?

When Creating an Altcoin for fun, what variable/attribute do I change in main.cpp file to increase/lower the time it takes for confirmations to take place? Also can the confirmation times be changed ...
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What causes the 'uncertainty' when a block is still relatively new

I am currently looking into bitcoin and the underlying blockchain technology for an internship. More specifically, I am trying to grasp the confirmation process. Many sources I have used for my ...
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Do Miners get a reward for re-confirming blocks?

As far as I know, to ensure double-spending didn't happened and also for other security reasons, there is minimum number of confirmations that a transaction should have to be accepted. That value is ...