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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How fast can Ripple transfer money from bank to bank?

I had a debate last night on how fast Ripple is. If I am moving money from bank account a to bank account b, how long would it take? I was told by one person that adding a block takes 8 secs. Another ...
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Understanding speed vs. fees on various wallets, esp. Instawallet and original client

The Bitcoin Wiki don't say much about fees, more precisely if you have a choice between speed vs. fees (pay more, deliver faster). In fact, I don't yet even have a clue how fast are bitcoin ...
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757 views

What does a negative “confirmations” value in listtransactions mean?

I sent a transaction on a small altcoin, and running listtransactions an hour later or so says -1 confirmations. It is forked from Bitcoin Core 0.8 and barely modified. What does this mean?
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0 fee transactions - possible that they never confirm?

I've made a Bitcoin tipping service for reddit: https://news.bitcoin.com/bitcoin-tipping-reddit-minitip/ Currently users pay a flat 0.1 mBTC miner's fee to tip others since it's done entirely on-...
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What, other that Fees and Luck, controls the time to confirmation?

Are there any factors that contribute to how fast a transaction is confirmed other than the Fee (sat/B), and a little bit of luck? Does it matter what service is used? How large the transaction is? ...
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How many days the verification could take? [duplicate]

I first time bought a smaller piece of bitcoin and wanted to do some shopping from that, but I still my wallet contains only not confirmed bitcoins. My questions are: Why the confirmation takes so ...
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how long does it take to get 6 confirmations with confidence of 99%

I had this question in an exam but I was not very sure how to solve it: Suppose Bob the merchant wants to have a policy that orders will ship within x minutes after receipt of payment. What value of ...
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How important is the fee for speed of confirmation?

I am developing a Bitcoin application, so I am sending a lot of "toy" transactions for testing, with 0 fees. But it seems that those take forever to get confirmed. (Right now I am waiting 45 minutes ...
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-walletnotify on 6 confirmations instead of 1?

Pretty straight forward. Right now im using -walletnotify to run some node.js code when i get an incoming transaction and when theres 1 confirmation. However, after reading around, i found out that 1 ...
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Why transactions' average confirmation times becoming more chaotic?

According to this chart, Bitcoin's transactions' average confirmation times are varying much more widely than they were a year ago. Why would this be? Is it because the daily transaction rate has been ...
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Bitcoins reversed [duplicate]

I was wondering, are there bitcoins that don't get through the confirmation? What does it need for blockchain to cancel your transaction. Are there hacked bitcoins or how does that work?
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Do transactions with old UTXOs take longer to confirm?

Suppose I do a transaction with an UXTO created years ago. Would that take longer to confirm because miners would have to look further back in the transaction chain to verify it?
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How can I determine the number of confirmations of a transaction and its fee using the Blockchain.info DATA API?

How can I know if any given transaction has confirmations and has paid the miner's fee, using the BlockChain.info DATA API?
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Stuck Transaction for almost 2 days, have paid fees [duplicate]

Can anybody please help with 1 transaction, its stuck already for 2 days, altho I did pay fees, not sure whats the issue, other payments sent after this has been confirmed already https://blockchain....
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Transaction with 0.0002 BTC fee but not confirmed sice 2 days [duplicate]

I'm a Bitcoin noob. This is my second Bitcoin transaction and I'm getting very nervous. My wallet (KryptoKit on Chrome) doesn't have a possibility to change the fees or anything on transactions. ...
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71 confirmations?

I'm not too worried if this doesn't work for some reason as it's not much money but can someone tell me what this spent thing means? It's been about 10 hours https://blockchain.info/tx-index/...
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Can anyone help me understand why my transaction won't confirm [duplicate]

https://blockchain.info/tx/23bddd7a323f5e772d4e3cb24c1c0687c8fcfa79066a0986082a8c101f1ce648?show_adv=true I have a high transaction fee, and not double spending. Any Ideas?
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Can I get confirmation time from txid (tx_hash)?

I want to get how long it takes time to get first confirmation for each transactions. My plan is this below. I'm subscribing mempool txes notification from my bitcoind node and I will save it with ...
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Is it possible for two nodes to view blockchains differently?

Is there a chance, that at some point in time, two blocks will have different number of confirmations, according to different nodes? Like, with difference up to 3-4 confirmations? The problem I'm ...
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220 views

why did blockchain.info misstate the value of this transaction

Here is a transaction to SatoshiDice for 0.01 BTC: But examine the corresponding entry in blockchain.info: They think this: Total Input 0.01974 BTC Total Output 0.01973 BTC But that is ...
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What is the “confirmation” field in a block?

What is the importance of the "confirmation" field in a block? How many confirmations are required to accept a block in a blockchain?
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Armory client shows transaction unconfirmed

I am new to btc and am using the Armory client. Yesterday I transferred some btc to wallet from my MtGox account. The wallet showed the btc received within minutes, but, after 12 hours it still shows ...
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How would one monitor an address for a transaction and 1 confirmation in PHP?

I have a small PHP script with my static bitcoin address shown. When someone sends any btc to that address, how can I get the PHP script to check if the transaction has had 1 confirmation? Do I have ...
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Are Bitcoin transactions really “frictionless” given confirmation time?

One of the big selling points for Bitcoin is that transactions are frictionless. I understand this to mean that there is no middleman to take a cut. However, there are 2 major frictions I see. 1) ...
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How do I accept bitcoin payments at a real world store?

From what I understand, there are some requirements for using bitcoins at a physical store: Both the store owner and the client must have Internet access The client must have a cellphone or a laptop ...
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107 views

How long should I wait to consider that the transation is “definitely” confirmed?

When one transaction is broadcasted, what is the probability that it won't be confirmed? (By probability, I mean the observed probability on the blockchain. If a person intentionally spend twice 1 ...
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can someone explain what i did wrong here? (btc transaction with fee not confirming) [duplicate]

https://blockchain.info/tx/c782b48bba09dea21896b7c58292abaec81d7ce2db2975f30b77176dddad492c was the fee not high enough? i have never had an issue with fees using the recommended amount that bitcoin ...
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Using funds that have not been completely transferred yet for a new transaction

What happens if I start a new transaction with funds from a transaction which isn't 100% complete? Let's say, the incoming transaction shows 2/3 of the green dot, but the sum is counted as full by ...
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994 views

Does desktop wallet need to be online for the coins to mature?

Suppose, I've installed a new coin wallet, got synchronized with the network, now I've sent some coins to my wallet. Now, if I close my wallet (and stay offline), would it get maturity after X amount ...
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Transaction marked as “Newly generated coins” on Blockchain.info

On blockchain.info I saw a transaction labeled as "No inputs (newly generated coins)". Are these new coins generated from mining? How come that such a transaction can have 30 confirmations, while ...
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Streaming API for confirmed transactions?

Is there an API that makes streams transactions as they're confirmed? Everything I can find seems to just be putting out unconfirmed transactions in realtime, rather than waiting for confirmation. To ...
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Is there some sort of algorithm to calculate transaction speed?

I'm wondering if there's a way that I can calculate how long it will take for a transaction of x BTC paid a y fee to get z confirmations based on current difficulty
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How many confirmations do bitcoin escrow websites wait on average?

To me it seems very dangerous not to wait for 6 confirmations when running an escrow. The scenario I'm thinking of: a miner deposits a large sum of bitcoins the escrow waits for one or two ...
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What happens to transaction once all the blocks are mined?

Once all the bitcoin blocks are mined(21 million limit has been reached) then would calculating the nonce still be so power intensive since the reward at this point of time would only be the ...
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I bought 1BTC and the transaction was instantaneously, how?

So, I went to localbitcoin, I met a random guy at a Starbucks gave him the money and he transfered 1BTC with his cellphone to my blockchain.info account. I thought I would have to wait at very least ...
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Second, Third, Etc Confirmations taking a long time, why?

I have sent a bitcoin transaction of 0.18, you can see it here. https://live.blockcypher.com/btc/tx/22bacef7d4fb78e4e90cd04540daad257a39cb4ab4510f9e0efe5a88efaf0f87/ I included a fee of 0.002 even ...
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729 views

Can a transaction be in two blocks?

What happens with a valid block which contains a transaction which was already included in previous blocks? Is such a block accepted by other nodes in the network or discarded?
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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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Is the proposed “Miner Promise” method of accepting 0-confirmation transactions safe?

This thread proposes a method for miners to promise "that their next block/s will contain a specific transaction", and/or that "they won't mine a conflicting transaction". If adopted by a large ...
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Is there any way to make a transaction invalid if it is not confirmed before a certain block?

It seems like it would be useful to avoid replay attacks if your wallet could specify that a transaction must be confirmed before say the (current+100)th block before broadcasting it I guess there ...
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How do you calculate a reasonable transaction fee?

These days transactions are taking a very long time to confirm. Higher transaction fees could be a possible solution. I want to know how to calculate a reasonable transaction fee, which is not so ...
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How does ShapeShift operate on 0-1 confirmations

ShapeShift can exchange user's crypto currency almost instantly. They state that most transactions don't require any confirmations: Small deposits are processed with zero confirmations. Larger ...
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Why is 6 the number of confirms that is considered secure?

Why is 6 is the number of confirmations that is considered secure? I haven't found any mathematical explanation or otherwise that explains why it is 6 and not 5 or 7. Is there a historical reason for ...
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Has there ever been a successful double spend attack on the Bitcoin network? If not, is it really necessary to wait for confirmations?

There is a lot of concern about waiting for confirmations to avoid a double spend attack, but has there ever actually been a double spend attack? It seems to be that there are two types of double ...
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681 views

Bitcoin-cli balance minconf

When I use the getbalance command in bitcoin-cli and I set minconf to 1. Will it display the bitcoins with 1 confirmations and more? If this is true, what is a good amount of confirmations that will ...
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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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What technical properties does a confirmed Tx have that an unconfirmed Tx does not?

From a user perspective, each block confirmation reduces the probability that a transaction payment will be reversed. However from the perspective of the software, what happens when a transaction is ...
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Does a transaction with a lock time need more time to be confirmed?

I've made this transaction in the testnet: https://testnet.blockexplorer.com/tx/2f18c646a2b2ee8ee1f295bb5a0f5cc51c5e820a123a14b0c0e170f9777518bb It's a multisign tx with locktime. The locktime has ...
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what is the longest period for a transection to be confirm? [duplicate]

Today my friend transferred bitcoins to my account and up till now there still 0/no confirmation.so how long is actually the period for the transection to be confirm? it is almost 8hours ad still no ...
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How many confirmation do i have to wait before i can spend the inputs I already received?

Can I spend Inputs with 0 confirmations?? If I could, are there some restrictions?