135 Why is my transaction not getting confirmed and what can I do about it? 2013-04-03T14:11:53.577

21 How does Satoshi Dice's 'zero confirmations' transaction system work technically? 2013-01-20T16:51:22.903

15 How secure is zero confirmations? 2014-01-20T14:36:24.053

12 How do I safely accept bitcoins without waiting for confirmations? 2011-09-01T03:16:01.907

11 Double spend attack by sending higher fee transaction directly to the pools possible? 2012-03-29T08:14:15.450

9 Could any standard fee transaction be double spent by using a higher fee? 2014-06-12T02:16:19.633

8 If Bitcoin transactions require ~10 min to clear, how can payments get recognized within seconds? 2015-01-18T01:50:37.627

8 What is the Lightning Network proposal? What problem is it trying to solve? 2016-08-26T21:49:00.487

7 What nodes are best for lessening the risk of loss from a race attack 2012-06-15T03:39:00.530

7 Can I spend a coin sent to myself before it confirms? 2012-07-31T18:35:49.193

5 0/confirmation race attack double spend transactions 2015-11-13T12:30:49.583

5 Double Spending before confirmation 2016-05-19T05:06:27.707

4 Get notified of incoming Bitcoin transaction, as soon as it broadcasted 2014-02-01T16:02:00.523

4 Could Bitcoins (or any other blockchain based cryptocurrency) feasibly ever be used for purchases that need to go through fast? 2015-08-01T11:09:24.573

4 It's possible to spend a BTC without fee to forge a payment? 2017-02-10T16:43:43.797

3 How can Blockchain.info wallet send unconfirmed bitcoins? 2014-05-17T08:50:49.597

3 Is there a way for merchants to insist on a tx fee to increase likelihood of the tx (eventually) being accepted into the blockchain? 2014-12-10T22:10:48.763

3 What does a merchant need to do to reject RBF transactions 2016-05-17T04:06:37.770

2 Why has this blockchain transaction not confirmed? 2015-10-27T17:32:14.437

2 can someone explain what i did wrong here? (btc transaction with fee not confirming) 2016-06-22T10:10:29.733

2 What restrictions are there to the application of opt-in RBF? 2016-11-07T10:47:30.230

2 0 fee transactions - possible that they never confirm? 2017-03-29T20:16:54.533

2 bcoin how to get zero confirmation 2017-07-31T12:23:50.230

2 What does "Green address verification" mean in the context of transaction validation? 2019-06-12T08:15:56.413

1 Instantaneous exchange/conversion of bitcoin into cash 2014-01-19T16:03:48.780

1 How big is the chance of double spending for 0, 1, 2, 3, 4, 5 and 6 confirmations? 2014-03-22T18:37:20.313

1 What is the risk of waiting for just one confirmation to validate a transaction, assuming the counterparty is not a miner? 2015-12-04T20:58:29.817

1 Can bitcoin be used for instant payment? 2016-09-13T04:59:25.287

1 bitcoin transaction is still unconfirmed after 30+ hours 2017-04-01T05:07:34.550

1 As a solo miner how can I prioritize my own unconfirmed transactions? 2017-11-28T01:27:40.823

1 Can low-cost purchases be accepted safely with no confirmations? 2018-03-18T04:31:15.000

1 confirmations: 0 vs confirmations: -1? 2018-10-01T16:02:57.253

1 Could decentralised proof of time in BCHSV solve for high PoW power consumption? 2019-01-12T07:09:49.130

0 Why is this unconfirmed? 2015-12-26T09:32:01.473

0 Transaction with 0.0002 BTC fee but not confirmed sice 2 days 2017-01-17T19:12:44.617

0 Bitcoin Transaction never confirmed even with a significant fee? 2017-12-19T04:21:24.543

0 0/unconfirmed and now no transactions anymore 2017-12-22T21:45:51.843

0 How to integrate 0-conf BCH payments into a web app? 2018-02-09T18:12:27.493

0 Wasn't 0-conf more secure than Visa, before blocks got full and RBF was added? 2018-02-16T23:53:25.103

0 what will be the best approach to accept Bitcoin payment instantly? 2018-03-28T10:51:49.333

0 ways to improve bitcoin tx finalization time 2018-04-18T21:12:06.810

0 How could a lightweight wallet determine the validity of 0-conf transaction? 2019-01-14T14:00:10.563

-1 Why were BTC not accepted in the Humble Borderlands Bundle? 2015-07-06T08:41:24.540