Questions tagged [unconfirmed-transactions]

This tag should be used for unconfirmed transactions, transactions that have not yet been included in a block.

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Why does Bitcoin Core store the block height and the time of each transaction in the memory pool?

...given that one can be derived from the other? Surely the unsigned integer of height would be sufficient without the addition uint64_t of the time (to the second), wouldn't it?
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BTC invalid transaction: double spending attempt?

I'm writing because I need some help in understanding the below hash data. Thank you. https://www.blockchain.com/btc/tx/976e6d64a4c98cf15ac917b98a04333f896b7cd15c1f2fdfb18f6fee668b670c Is it a double ...
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31 views

Can transactions be held for a long time without being processed?

I am learning a little bit about the bitcoin technology and I have some basic questions about its p2p and transaction processing. First imagine that a bitcoin transaction has included a fee (maybe a ...
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24 views

Unconfirmed transaction in memory pool [duplicate]

In February 2021, I sent some bitcoin from bitcoin core account. I choose a low transaction fee. The transaction is down as 'unconfirmed, memory pool'. The bitcoin has not appeared at the receiving ...
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3answers
2k views

What (if anything) in the bitcoin protocol prevents bias against certain accounts?

The bitcoin protocol allows miners to choose which transactions to include when they create a block. They can't include any inauthentic transactions, but to allow for an open market of transaction ...
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10 views

my transaction is unconfirmed for days now why? [duplicate]

I have an unconfirmed transaction that has been sitting there for more 4 days now. Any assistance would be greatly appreciated. Thanks. https://www.blockchain.com/btc/tx/...
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1answer
58 views

Bitcoin transaction not confirmed since 3 days ago [duplicate]

Hello I might sound stupid but it’s been three days since I issued bitcoin transactions, all unconfirmed so far. I use Blockchain.com to manage my wallet and have done everything normally (I think, as ...
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74 views

Idea for zero confirmations transactions using “proof of risk”

I was wondering if the following could be implemented on Bitcoin or other cryptos, or maybe in the future with additional opcodes. Suppose Alice wants to send small transactions to others, without the ...
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27 views

Transaction not received? [duplicate]

Can someone help me? i did my first transaction From ID : 3FxvvRt1wpTHzN8xYVBXMsrGB6aTSrndBQ To ID: 3LSGTkzC62tgTALSGHF7Ztw1dPF5Vyg38B The adresses are right, not fault to find? Thanks
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34 views

Making regtest's generatetoaddress work with blocksonly=1

I'm setting up a regtest scenario in which I want to send transactions which should be included in new blocks created via the generatetoaddress RPC call. However, I want to disable transaction ...
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1answer
105 views

How to do RBF using the Ledger Nano / Ledger Live [duplicate]

Would anyone here please be able to tell me how to do RBF using the ledger nano- I can see the transaction has been stuck for about 12 hours now. The TX is ...
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32 views

I was scammed in march, but it showed where in bitcoin wallet app that there was 750 in bitcoin cash i neen help of retriving it [duplicate]

I was scammed in May and I saw in my bitcoin wallet app that there was 770 dollars in there how can I retrieve it
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1answer
132 views

Can an attacker flood the Bitcoin network with fake transactions?

We are in 2050. People show an ever-growing distrust in the global banking system and start transitioning to only using Bitcoin: most companies accept it as a form of payment, and people settle their ...
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Query regarding unconfirmed transactions [duplicate]

I got a bitcoin transferred to my wallet, it is unconfirmed but displaying the amount $500 in my Bitcoin address in my wallet. It had been almost a day but transaction is not confirmed in explorer but ...
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1answer
157 views

Unconfirmed btc transactions

Reason - Due to unconfirmed inputs. Can someone please explain what this means and could the sender do this intentionally. In other words to scam someone.
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I have a question. Can the price change if your transaction remain unconfirmed for a couple of hrs

I had to make a payment with bitcion to a wallet with specific amt. I made exact payment, but price bitcoin was going up. But my transaction was still unconfirmed till the evening. They rejected my ...
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30 views

Sent transaction on 30 march 2021 still unconfirmed in mempool what can i do? [duplicate]

I made small BTC transaction from my bitcoincore wallet to account of Binance on March 30, 2021. I did set the fee low. But i wait a month for the transaction to back to my wallet. But it said still ...
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67 views

How can I transfer unconfirmed transactions from wallet.dat to a new blockchain wallet

My question may not be very clear since I’m not really an expert in bitcoin and its technology. But in my possession I have just a wallet.dat files with an unconfirmed transaction on it. I followed a ...
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38 views

Automatically forward bitcoins from address A to Address C At 0 confirmations?

I run a bitcoin full node,at that node i have an Address A. Assuming that Address A receive an Amount from Address B.(i can get UTXO information from blockchain.info API) How can I automaticlly resend ...
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40 views

How to create a double spend to prioritize a new transaction over a previous unconfirmed transaction?

I'd like to generate a double spend transaction and increase the gas fees over the previous, unconfirmed transaction that has been stuck for a week. I know there's other answers regarding double spend ...
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289 views

How do I double spend using electrum for fix unconfirmed transaction

I have two Blockchain.com wallets.(Both of them are mine) Some days ago i did a big mistake. I sent 1100$ From wallet #1 to wallet #2. (10.0 sat/vB > As you see this is very very low) (TX LINK) And ...
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1answer
149 views

Blockchain.com wallet | 1178$ transaction with low fee = 10 satoshi | How fix unconfirmed issue

I have a blockchain.com wallet. yesterday i did a big mistake : I customized transaction fee and set it to 10 satoshi. Here is the tx link of that transaction. Now after 1 day it has n't confirm. Did ...
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2answers
187 views

I used edge wallet to send my bitcoin from my wallet to my cash app but i used a low fee soo its been unconfirmed for 10 days what can i do? [duplicate]

My transaction 5c8552a6744b3428d3ec4b5c0dd8b378ffeb4efd703b76a2b9d106250234d766 Has been unconfirmed for 10 days is there anything I can do to get it confirmed or do I just have to wait?
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1answer
170 views

Unconfirmed transaction: the status is "0 / unacknowledged, not in memory pool "

I started a transaction with bitcoin-0.21.0-win64, a Windows client. It may be that the fee is set too low, which leads to the unsuccessful transaction. What should I do in the future? What do I need ...
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1answer
84 views

Found Bitcoin Core Wallet with unconfirmed Transactions, anything to salvage? [duplicate]

I am currently looking through old .dat files and found a wallet with two "Received with" transactions that are unconfirmed. When I enter the address from the Label on blockchain.info the ...
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2answers
114 views

Is it okay to chain multiple unconfirmed transactions?

Is it okay to chain and broadcast multiple unconfirmed transactions? For example: I have two confirmed UTXOs UC1 and UC2. Using both as inputs, I then create and broadcast transaction T1, which ...
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17 views

Pending Transaction [duplicate]

I sent out bitcoin to a wallet with a low fee. It's 5 days now, it still says pending and when I try tracking the wallet ID it says "No transaction found". The funds were debited from my ...
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2answers
102 views

How can an output be spent while the transaction is in mempool

I have seen transactions on a block explorer where the transaction is in mempool (unconfirmed) but one of the outputs already appears as spent, I am curious how this works. This question is a ...
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0answers
20 views

Bitcoin TX ID not exist [duplicate]

I use the blockchain.com account send some btc to my trezor account in Feb 2021. Later I found the TX id had record in blockchain.com, even if mempool check... Also have. Later I found still not ...
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1answer
154 views

Can a unconfirmed transaction be lost or modified?

I am beginner and I am still learning fundamentals of block and bitcoin network. Suppose, I do a transaction on bitcoin network, it is marked as unconfirmed transaction and is stored in mempool of ...
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1answer
407 views

I set my transaction fee too low 2 months ago and blockchain says "transaction invalid", will I get my coins back? [duplicate]

About 2 months ago I sent BTC from my Mycelium wallet to an XMR exchange, however I set the transaction fee too low so it never got any confirmations. I found the transaction on blockchain.info and it ...
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45 views

My Bitcoin transaction remained unconfirmed for 20 days now [duplicate]

I sent a bitcoin transaction from one of my wallets into another wallet meant for trading. Its been 20 days now and the transaction remained unconfirmed. Please I need help because I sent this coin ...
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1answer
44 views

Unconfirmed translation [duplicate]

I sent 1500 from my wallet address last 2weeks transaction faild to confirm transaction id 1624600252fd611c8d07ae4f6a7922850ea52014d93265fa7340979e8fd55647
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2answers
196 views

Will nodes configured with a larger-than-default mempool automatically retransmit transactions that have been dropped from the default mempool?

If a transaction is sent and dropped from the default mempool before it is included in a block, but nodes with a larger-than-default mempool size exist that still have the transaction, will those ...
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13 views

Mycelium transaction [duplicate]

I made a transaction yesterday to my wallet,vthrn sent it to someone. It is showing pending. Can I cancel the transaction and have it go back to my wallet and send out again
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68 views

Sending less than 0.001 BTC from my Bitcoin Core Wallet not in memory pool

I recently managed to recover my wallet.dat and passphrase and have been trying to send the 0.00126913 BTC balance from my Bitcoin Core wallet into my Binance account, however the transactions stay ...
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1answer
35 views

my unconfirmed transactions hold for over 1 day [duplicate]

I have following 2 unconfirmed bitcoin incoming transaction for one day, can you please advise how to speed up? 1Eg8thYVMBTpXg78FQo2sXhxeFdZWB9DjN 1D3grbjFXZWUp1wCApLTHQ9GAxsyyAawkU
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1answer
38 views

Trust in bitcoin networking

I am new to the subject, but as I was studying I wasn't able to understand something and I would appreciate if anyone could help me. I understand that in most aspects bitcoin doesn't rely on trusting ...
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0answers
14 views

My transaction with 9.565sat/B not yet confirmed please help me out [duplicate]

https://www.blockchain.com/btc/tx/1a6e4f94d98f6ce9c7348c0b4187ecb67bbd2119943f8609b4cdfa1690ca5a10 That's the transaction link please help me do something about it I need to use the btc before 21 ...
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0answers
24 views

Why has there not been any confirmation for an entire hour? What do you recommend that I do to speed them up for myself and others? [duplicate]

I made a transaction an entire hour ago. Still in the damn "memory pool". I've had extremely varied experiences over the years with transaction speed, but I'm really starting to feel as if ...
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1answer
63 views

Why should I care about my transactions ever reaching the blockchain if I can spend them while unconfirmed?

From what I understand, I can use unconfirmed transactions because they are essentially already confirmed, they just need to reach the blockchain. This can create a chain of unconfirmed transactions, ...
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1answer
154 views

Transaction with a high fee keeps getting skipped... Reason why?

I was sent a transaction that has been unconfirmed for 3 days now - but the feerate is relatively high (53.8 sat/vB). Blocks have been confirming transactions with lower feerates for days, but for ...
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0answers
15 views

How do I cancel my Unconfirmed Blockchain Transaction? [duplicate]

I am using blockchain.com. I have made a bitcoin transaction of 0.0015 BTC to the address 1FCMXNiJTXB8pfEVpeaijtEAhcErW8Cbr1 . This is Coinexpay.cash exchange address. You can see the transaction at ...
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1answer
123 views

Please help out I send 109k to my client he was able to receive $50,000 please help

I send a bitcoin transaction of all coin my wallet which is $109,180 to my client wallet address giving to me. But he received $50,000 in is wallet address. And I sent all the coin my of 109180. ...
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1answer
41 views

Paid $4.26 on a $133 transfer - why unconfirmed? [duplicate]

I sent money to myself from a Bitpay wallet (using send Max) to a Cashapp wallet. Transaction id - 577b3fe1e372e2375bcfbb2c666cdc74fa766fd022592040a539154c9ff7d820 https://www.blockchain.com/btc/tx/...
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1answer
117 views

How to choose the transactions for a block?

From my understanding, the memory pool (or transaction pool) contains "open" or "unconfirmed" transactions that have to be validated and can be chosen (arbitrarily?) to be part of ...
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1answer
69 views

Do you have to keep broadcasting transactions until mined?

From what I know, you can broadcast a transaction including input addresses, output addresses, and amounts, which is signed by your private key. I often hear that your transaction might not be mined ...
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2answers
97 views

Mitigating a Double Spend Attack by Punishing the Attacker?

One of the main reasons it's not safe to accept Bitcoin with 0 confirmations is due to the possibility of a double spend (where Mr. Scammer first sends 1 BTC to Alice and then creates an identical ...
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1answer
113 views

Safely Accept Bitcoin Payments with 0 Confirmations [duplicate]

GAP600 is a service (that has processed $5 billion in cryptocurrency) which allows exchanges and payment service providers to process Bitcoin payments instantly (0 confirmation trx). It guarantees a ...
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1answer
160 views

How do light clients using compact block filters get relevant unconfirmed transactions?

I was discussing various light client models and we got into unconfirmed transactions. With the BIP37-based bloom filters, a light client would subscribe to updates from full node peers by submitting ...

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