Bitcoin mempool unconfirmed transactions. Understanding the Mempool Protocol.
Bitcoin mempool unconfirmed transactions. Things to know about Bitcoin mempool congestion.
Bitcoin mempool unconfirmed transactions Transactions remain in the mempool until they are confirmed in a block or dropped due to expiration. Transactions paying a higher fee per size (feerate) are usually included earlier than low feerate transactions. 00296592 BTC A high number of transactions in the mempool indicates a congested traffic which will result in longer average confirmation time and higher priority fees. While early versions of Bitcoin Because the new transaction has a higher fee than the transaction it is replacing, it is prioritized by the Bitcoin network, and this effectively cancels the old unconfirmed transaction. If you need a transaction to be May 17, 2023 · These rules are examples of transaction relay policy, a set of validation rules in addition to consensus which nodes apply to unconfirmed transactions. May 8, 2023 · The Bitcoin mempool, short for memory pool, is a temporary storage space for unconfirmed transactions waiting to be added to a block and included in the blockchain. Network Attacks or Spam Transactions: Malicious actors can flood the network with low-fee transactions, intentionally clogging the Mempool. According to mempool. 0, these are the ways a transaction can leave the mempool: The transaction was included in a block. dat resolved by #10330 in 0. Note that this only affects your own local Dec 6, 2023 · According to mempool. Factors like network congestion and transaction fees influence confirmation times, which users must understand to manage their cryptocurrency effectively. To remove an unconfirmed transaction with 0. Dec 21, 2023 · Blockchain unconfirmed transactions are transfers awaiting inclusion in a block, residing temporarily in the Mempool. After a transaction is verified by a node, it waits inside the Mempool until it’s picked up by a Bitcoin miner and inserted into a block. Known as Mempool Accelerator, the service will get “stuck transactions confirmed by paying an out-of-band fee,” the project noted . Apr 26, 2023 · At 4:30 p. Result A list of mempool transactions in arbitrary order. May 29, 2019 · 200k unconfirmed transactions. But how long do you have to wait? Make a note of the individual bitcoin address(es) that the unconfirmed transaction was sent from. Poor guy spent years of brute-force time for nothing. Bitcoin Explorer: The free, open-source, easy-to-setup, easy-to-use, self-hosted explorer Protect your privacy while enjoying the conveniences of public explorers. Bitcoin miners select transactions from their mempool to include in a new block. Network Confirmed transactions Unconfirmed transactions Failed transactions Mempool Figure 2: Life-cycle of a Bitcoin transaction. Child Pays For Parent (CPFP) is a fee bumping technique where a user spends an output from a low-feerate unconfirmed transaction in a child transaction with a high feerate in order to encourage miners to include both transactions in a block. Each mempool transaction is a dictionary with the following keys:--snip-- Dec 21, 2020 · The Bitcoin Memory Pool, or Bitcoin Mempool for short, is the ‘waiting room’ for all unconfirmed transactions on the Bitcoin network before they are (sequentially) aggregated into blocks. com. Bitcoin Mempool. How does Memory pool work? Now your transaction have arrived to the mempool. Without RBF, the process is more complicated. These blocks are the inspiration for our half-filled Nov 5, 2024 · The Bitcoin transaction mempool is a temporary storage area for unconfirmed transactions that are waiting for a miner to add them to a new block. space reports 134,986 unconfirmed transactions. The transactions are colored by the fee rate: the amount of fee they pay per virtual byte gas price they pay. 6 software to divert bitcoin unconfirmed transaction. The Bitcoin mempool, which holds unconfirmed transactions, plays a crucial role in determining transaction times. Aug 28, 2021 · Once this verification gets successful it will then get added to the mempool which is a place for unconfirmed Bitcoin transactions. Explanation. When we build new transactions, we need to estimate the feerate that'll get us a confirmation in the intended time frame. Using Electrum for example, you can manually edit a copy of your wallet (it's just a JSON file) and remove the transaction you want to reverse. m. 1/16/2025, 01:38:47. You can view the activity in the Bitcoin mempool on websites such as Blockchain. 00060941 BTC Nov 27, 2024 · An unconfirmed transaction is a transaction that was initiated but hasn’t been recorded on the blockchain yet. Sep 20, 2024 · The bot takes a few tens of seconds to brute-force the now-effectively-33-bit private key, and submits its own transaction consuming the same input but with a higher transaction fee; The bot's transaction thus replaces the poor guy's transaction, and is mined, giving the prize money to the bot. I want to analyze unconfirmed transactions, but there are more and more transactions in the memory pool, which leads to longer and longer analysis time of my program, so Oct 23, 2024 · Use Transaction Accelerators: Certain Bitcoin mining pools offer transaction acceleration services, which, for a fee, prioritize your unconfirmed transaction and include it in the next block. Importantly, the block height when the transaction entered the mempool might be different from one mempool to another, as transactions take time to propagate through the network and a new block might be mined while it's propagating. We run default bitcoin core settings. Find your Bitcoin directory; Delete mempool. As a result, the parent and child transactions clear simultaneously. In practice, unconfirmed transactions tend to be dropped by nodes after 14 days. However, the Explore the full Bitcoin ecosystem with The Mempool Open Source Project®. e, present inside the pool). It is easy to get confused as it seems like a single entity most of the time. In essence, the mempool is Bitcoin’s “waiting area” for transactions that each full node maintains for itself. Sep 12, 2023 · Releasing Transactions From the Bitcoin Mempool. A miner removes a transaction from the mempool and confirms it only when they add it to a block. space website invented the concept of visualizing a Bitcoin node's mempool as projected blocks. Overview . For force close transactions and some sweeps, you may attempt to retrieve the transaction from your local mempool if the transaction id is known: bitcoin-cli getrawtransaction "txid" If you are unable to broadcast a transaction or finding it in the local mempool despite a recent restart, you may have to temporarily increase the size of your Jun 8, 2017 · To apply -zapwallettxes to remove a transaction you also have to delete the mempool. Crypto Transaction Hijacker V8. Hash 594f-30e7. Wait for the Network to Clear : In cases of network congestion, sometimes the best option is to wait for the traffic to decrease, which can reduce the Jan 26, 2023 · Transactions with low fees may remain in the mempool for as long as 14 days. Sep 24, 2023 · Think of a mempool as a blockchain’s equivalent of a waiting room, with users sending Bitcoin in (or making inscriptions) and waiting for the transaction to get selected by a miner and inscribed into the public ledger. The issue of unconfirmed transactions came to a head in December 2017 during the peak of the cryptocurrency craze. May 16, 2022 · Blocks don't "carry" any unconfirmed transactions. During the transfer, I selected the option for a 7-day target confirmation time (1008 blocks) with the wallet’s suggested minimum fee. Every node keeps its own set of unconfirmed transactions that it has seen. the mempool log of unconfirmed transactions has spiked to Dec 21, 2022 · A bitcoin node is any computer that runs the bitcoin software, enforces the bitcoin consensus rules, and validates bitcoin transactions and blocks. Hence, if the transaction is not urgent you can wait until the mempool shrinks down and then initiate your transaction. Jan 29, 2022 · An unconfirmed Bitcoin transaction can be fixed in two ways: by using “replace-by-fee or RBF protocol” or “higher fee double-spend transaction. The most important ones are the following: Unconfirmed Transaction Count (this is the Mempool Bitcoin uses) Pending Transaction Fee (the fees that will be given to miners) Mempool Size (how large is the bitcoin mempool backlog) A mempool explorer is a tool that enables you to view real-time and historical information about a node's mempool, visualize its transactions, and search and view those transactions. Jul 21, 2023 · On the Bitcoin network, the average confirmation time for a BTC payment is approximately 10 minutes. The Bitcoin network can process approximately 3-6 transactions per second, with occasional peaks of up to 7-8 transactions per second. This makes the transaction a part of the blockchain, giving it its first confirmation. This represents a serious risk, as it undermines the integrity of the digital currency. The transaction or one of its unconfirmed ancestors conflicts with a transaction that was included in a block. Did you know? CPFP was conceptualized by Bitcoin developers to address low-fee transaction issues, enabling users to speed up confirmations by incentivizing miners with higher fees in subsequent transactions. SOFTWARE Crypto Transaction Hijacker V8. Sep 17, 2024 · Mempool: the waiting room for Bitcoin transactions “Mempool” is a combination of “memory” and “pool. The Bitcoin Mempool feature was added to the Bitcoin network after the BIP 35 (Bitcoin Improvement Proposal 35) by Jeff Garzik was approved. By definition, a transaction is confirmed when it's included in a block. Run Bitcoin Core with the -zapwallettxes option (or wait a few days until your wallet stops broadcasting the transaction and it falls out of the global transaction mempool). The network fee is necessary to complete the transaction and verify payment on the blockchain. Unconfirmed transactions, while an integral part of blockchain operation, bring with them certain risks. Here, you can monitor the most recent Bitcoin transactions live as they come into the mempool. So, he includes that unconfirmed transaction in a new transaction and pays a high-enough fee to encourage a miner to include both the original (parent) transaction and the new (child) transaction in a block. Jan 11, 2024 · While the Bitcoin mempool unconfirmed transactions never cause the loss of funds, they can pose significant risks for time-sensitive transfers. 0). Hash b865-43b9. Miners then take these transactions from the mempool and include them in blocks. But you can't rely on an unconfirmed transaction sticking around or on it being dropped. In this article, we will discuss the critical role of Bitcoin mempools in transaction processing and validation for the Bitcoin network. All unconfirmed transactions remain in the mempool until they are selected by miners to be included in a block. info block explorer. When a bitcoin miner finds a new block, they select transactions from the mempool to include in that block. It should be noted that CPFP is not a new protocol feature, like RBF. 12/24/2024, 08:02:39. Hash 51d3-e2dc. Dec 17, 2024 · 7 min read. Once a node has verified a transaction, it waits inside The number of pending bitcoin transactions in the mempool has surpassed 157,000, prompting a rise in high-priority transaction fees to $3. includes segwit discount). The mempool count metric tells how many transactions are causing the congestion whereas the {mempoolsize} chart is a better metric to estimate how long the congestion will last. Steps to Cancel a Bitcoin Transaction: Sep 8, 2023 · Risks of Blockchain Unconfirmed Transactions. 4 sat/vB. ” A Bitcoin transaction cannot be reversed However, the Bitcoin mempool remains a mystery for most. By mistake I chose a low feerate, and now the transaction is stuck in the mempool, and who knows if anyone will notice it. get_mempool(scripthash) New in version 1. These transactions remain in the mempool, awaiting validation and confirmation by miners. 1 day ago · Unconfirmed transactions end up in the mempool (memory pool), a temporary storage space or a queue of pending transactions. At that point, the transaction can no longer be reversed (unless the block is orphaned). A high number of transactions in the mempool indicates a congested traffic which will result in longer average confirmation time and higher priority fees. Here are a few ways to release transactions from the Bitcoin mempool. To incentivize Bitcoin miners to include the transaction users can either opt to pay additional fees or restart the payment. However, there are a few options to consider in case the bitcoin transaction is unconfirmed for too long: Bitcoin Transaction Accelerator: The most popular way to cancel a bitcoin transaction is by using a Bitcoin transaction accelerator. Double-Spending Implications. How Long Does a Bitcoin Transaction Normally Take? A Bitcoin transaction normally takes around 10-20 minutes to be included in the blockchain Jun 12, 2022 · Assume there there 100 unconfirmed transactions currently in the MemPool. Jan 1, 2019 · Please note that removing a transaction from your mempool will not affect any other node's mempool, and your transaction can still confirm in the future as long as it is valid. Dec 30, 2020 · Mempool. Bitcoin Mempool. scripthash The script hash as a hexadecimal string. At some point along the way, persistence was added to the mempool and an expiry period for transactions that remained in there past a certain amount of time. dat in the Bitcoin directory Aug 19, 2024 · The Bitcoin mempool is where unconfirmed transactions on the Bitcoin blockchain go for miners to include in a block. When the second transaction is included in a block, the first will be removed from the mempool because it'd be a double-spend. This prevents Double Spending. Mar 21, 2024 · It is a way for Bitcoin to store unconfirmed transactions before being confirmed in the blockchain. Due to the double whammy of overloaded exchanges and constant DDoS attacks, a whopping number of 200,000 Bitcoin transactions remained unconfirmed for over a day. These are special Transactions with too low a fee had a way to get mined, as the first 100 transactions in each block given that they were under 10 kilobytes in size were free. It can be likened to waiting rooms at a doctor's office. Also shows the sum of their serialized virtual sizes (i. Once a transaction is included in a block, it has one confirmation. Signature blockchain. Sep 2, 2024 · Usually, a bitcoin transaction takes up to 48 hours to show the confirmation status. 1/13/2025, 14:46:32. Tools like mempool. space the fee is 4. 14. . 0. Generally, Bitcoin can process about five transactions per second, and delays occur when the volume of transactions exceeds this The mempool contains unconfirmed transactions waiting to be included in a block. Why do Bitcoin transactions remain unconfirmed? May 5, 2023 · I use Bitcoin Core 22. The mempool is where all valid transactions wait to be confirmed by the Bitcoin network. As a temporary holding area for Bitcoin May 7, 2023 · In just under two weeks, the number of unconfirmed transactions on the Bitcoin network has skyrocketed from 134,000 to over 390,000, causing a bottleneck in the mempool. 92086705 BTC The Bitcoin network hashrate dropped significantly over the last four days sliding from a high of 161 EH/s to 90 EH/s on October 27. How a mempool works? The user creates a transaction and sends it to the network. Meanwhile, transaction fees vary, with a no-priority transaction costing a 2 Jul 19, 2023 · In a nutshell, all Bitcoin transactions first exist as ‘unconfirmed’ transactions in the mempool before they are permanently recorded on the Bitcoin blockchain. Understanding the Mempool Protocol. 1/09/2025, 17:22:54. 58. Bitcoin is the father of blockchain technology. In previous versions of Bitcoin Core, when sending transactions, the wallet software calculated your transaction fee. Bitcoin enabled everyone to make the peer-to-peer transactions they enjoy today; this guide will teach you how to get these transactions from the Bitcoin mempool. A transaction is confirmed only when a miner adds it to a block and Jul 13, 2023 · Now, transactions in a Bitcoin mempool are measured in weight units. Explore the full Bitcoin ecosystem with The Mempool Open Source Project®. Dive into the Bitcoin mempool and discover economic trends onchain. Miners select transactions from the mempool to include in the next block, prioritising those with higher fees because miners aren’t charities; they’re there for the money. May 26, 2022 · What is mempool? Bitcoin mempool is a set of all transactions that have not yet been confirmed and are waiting for their turn. These blocks are the inspiration for our half-filled Mar 11, 2024 · Pending transactions remain within Bitcoin’s mempool – a memory pool where payments are organized and queued. There are a number of websites that you can use to track the mempool as well as the number of unconfirmed transactions. Things to know about Bitcoin mempool congestion. ” Essentially, it represents the “waiting room” for Bitcoin transactions. space, there are more than 280,000 unconfirmed transactions on the BTC network. 57GB. Made for Bitcoiners by Bitcoiners. As mentioned earlier, unconfirmed transactions can potentially be double-spent. To grasp this idea Bitcoin Mempool. However, the actual Bitcoin transaction time can fluctuate significantly. 1/16/2025, 04:17:57. And the size of a block is such that it's roughly made up of 10 transactions. Bitcoin memory pool, commonly called a mempool, is a storage space for unconfirmed transactions. A little over a fortnight ago, the clutter in Bitcoin’s mempool was quite pronounced, boasting over 500,000 unconfirmed Historical and current size of our bitcoin node's mempool, or number of unconfirmed transactions waiting to be included in a block. Point 10 simply node stores that transaction whose input refers to the output of unconfirmed transaction (i. Leather Earn is now live! Explore the interface to connect with a directory of yield and Stacking service providers. TXID Previous fee New fee Status; 518914f4ac11cdd2ba28ef6454ddd499511c000c434f733ac499c69c6b3 6179b. These clustering heuristics ignore the information Feb 24, 2020 · Users can push unconfirmed transactions, or transactions with zero confirmations through the mempool, using 1 of the following 3 methods: RBF or Replace By Fee protocol – certain wallets allow the original transaction to be replaced by one with a higher transaction fee, which makes it more likely to be picked up by miners. 1. The transaction was replaced by a newer version (see BIP 125). 0), deprioritizing the original transaction will also make it easier to replace it, since the modified feerate is used as basis to evaluate a replacement. The data on this page is generated from my full node and is updated every minute. I sent a transaction. Hash d67a-5ffe. Dec 17, 2024 · Queued transactions are unconfirmed and waiting in the mempool, while pending transactions are already mined but awaiting multiple confirmations. 0 you have to: Shut down Bitcoin Core. Mar 29, 2018 · What Is The Bitcoin Mempool? The Bitcoin mempool is the pool of unconfirmed Bitcoin transactions on the Bitcoin network. Not just your transaction but there are 1000s of other unconfirmed transactions that are waiting in the mempool. Miners select transactions from the mempool to include in the next block they mine. Although most people refer to the mempool as a single entity, it is technically not. Hash ad8c-3fff. Jan 1, 2019 · I have a transaction stuck in the mempool that I sent I little over 2 months ago. This indeterminism is a source of confusion for users and wallets. Apr 12, 2024 · The mempool is a temporary storage area on each Bitcoin node where valid, unconfirmed transactions are held. Unconfirmed BTC payments and transactions are queued in these reserves until miners choose them. At the time of writing, there are roughly 393,000 unconfirmed Bitcoin transactions. This was for a payment, and when it didn't confirm quickly I used different wallet to send a separate payment with a higher fee, which confirmed quickly. Automatic removal: Unconfirmed transactions within a specific timeframe are automatically released from the mempool. space (Bitcoin) and Etherscan (Ethereum) help users monitor mempool activity, estimate fees, and predict transaction confirmation times. The stacked bars in the chart represent grouped and sorted transactions by their feerate. ET on Wednesday, data obtained from the web portal mempool. Jul 21, 2020 · Unconfirmed bitcoin transactions are also known as the transactions in the mempool. 38. time in mempool. Sep 15, 2023 · The quantity of unconfirmed bitcoin transactions has consistently exceeded the 500,000 mark, nearly touching 700,000 on September 6, 2023. Once a Bitcoin transaction happens on Bitcoin’s blockchain, it is not immediately added; instead, it goes into this pool of in-motion transactions. Oct 24, 2023 · Royalty-free stock vector ID: 1311840371 Transaction Selection: Priority Queue. Bitcoin nodes are. Mempool congestion is when there are many unconfirmed Bitcoin transactions waiting to be confirmed to the blockchain by miners, and this is similar to when waiting rooms are full of people Aug 26, 2024 · Bitcoin Mempool Summary. The Bitcoin Core mempool. Each transaction pays a fee and has a size. The A mempool explorer is a tool that enables you to view real-time and historical information about a node's mempool, visualize its transactions, and search and view those transactions. As transactions that use segwit features begin to be used, this change will allow more data to be included per block (with 100% of transactions using segwit features this is expected to be about 2 MB of data per block Oct 3, 2024 · Ensure that the unconfirmed transaction hash and wallet addresses you provide are correct to avoid any issues during the redirection process. The Memory Pool holds pending transactions before miners confirm them its size fluctuates with network activity. The Bitcoin mempool and the unconfirmed transactions associated with it are changing constantly. Bitcoin mempool refers to a waiting room that collects a valid pending (unconfirmed) transaction until it is processed & added to the block. If a transaction is small, or if the network is congested at the moment, some transactions might be stuck in the mempool for up to 72 hours. As soon as another block is mined on the Dec 12, 2024 · I initiated a Bitcoin transaction from Bitcoin Core to another wallet, and it has remained unconfirmed for more than 7 days. Unconfirmed BTC Transactions. (Issue with mempool. 1/13/2025, 15:34:07. Mar 3, 2023 · Bitcoin transaction. Aug 5, 2022 · Nodes store unconfirmed transactions in their memory pool (or mempool). Now when a miner completes the Proof of Work & successfully adds his block to the blockchain, any other miner who has even one of those 10 transactions in the current block he is trying to mine Mar 30, 2021 · Technically, every node checks this condition before adding the transaction in mempool. Metrics indicate that Bitcoin’s mempool, a Bitcoin Mempool. Hash 0016-b644. With cryptocurrencies like Bitcoin, unconfirmed transactions exist in the blockchain’s memory pool, more commonly known as the “mempool”. The Mempool is a “waiting area” for Bitcoin transactions that each full node maintains for itself. Sep 24, 2023 · The option to abandon a transaction is only available if a) it has not been abandoned before, b) neither the transaction or a conflicting transaction is confirmed, and c) the transaction is not in your own node’s mempool. 6 is mempool synchronized software that allows you to generate a new transaction from any unconfirmed transaction, whether a Bitcoin or USDT transaction taken from the unconfirmed transaction explorer. This upgrade introduced what is known as a SegWit feature. Then you can disable your internet connection, swap the edited copy of the wallet Jun 24, 2022 · Generally, we use txid any time we reference individual transactions. The Bitcoin Mempool (memory pool) is a collection of all transaction data in a block that have been verified by Bitcoin nodes, but are not yet confirmed. If the transaction is already confirmed or if RBF is disabled, then it is not possible to replace the transaction. space: Unconfirmed transaction backlog in the mempool For this example, I've sent an initial transaction with a low 1 sat/vbyte fee rate: So my 1 sat/vbyte transaction has been broadcasted and is awaiting confirmation - I can click on "View in Explorer" in the Blockstream Green app and it will open the Blockstream. Furthermore, memory pool usage has exceeded 300 MB and reached 1. e. Nov 18, 2017 · As of Bitcoin Core 0. The network’s Jul 29, 2024 · Bitcoin blockchain explorer Mempool has launched an off-chain service that aims to help users expedite unconfirmed transactions by paying an extra miner fee and service charge. get_mempool Return the unconfirmed transactions of a script hash. Each running full node on the Bitcoin network is connected to this mempool. See the real-time status of your transactions, get network info, and more. Bitcoin consensus rules require that the transaction which creates an output must appear earlier in the Feb 20, 2024 · blockchain. Unconfirmed Jul 20, 2024 · The Bitcoin mempool can be analyzed through a wide range of metrics. When processing transactions, network nodes give priority to and confirm them based on the potential profits they could generate, favouring those with greater rewards. Existing clustering heuristics focus only on transaction pat-terns presented by transactions already recorded in the Bitcoin blockchain. Jun 20, 2021 · If the original transaction signaled RBF, or your node uses the mempoolfullrbf startup option (enabled by default starting with Bitcoin Core 28. We base our estimate on tracking how long transactions were in our mempool before they got included in a block. Each node keeps their own record of unconfirmed transactions. As a user, you can’t directly control the release of a transaction from the Bitcoin mempool. Aug 5, 2024 · The Bitcoin blockchain’s mempool stores unconfirmed transactions. A stuck transaction may remain pending indefinitely, and those with the lowest fees may even be left Feb 14, 2019 · What is an unconfirmed Bitcoin transaction? An unconfirmed Bitcoin transaction is one that has been broadcast to the network but has not yet been included in a block on the blockchain. Note that even when you abandon a transaction it might still be retained by other nodes. As the mempool fills up, transactions with lower fees may be delayed until there is less congestion. scripthash. In times of high network congestion, your transaction could hang unconfirmed in the mempool for several hours or even days. dat as the transaction is otherwise reintroduced into the wallet when the mempool is imported. With Bitcoin started a new era of blockchain and decentralization. The mempool. This tool therefore allows you to divert any Sep 24, 2020 · I know there is a function that allows me to see all transactions that are in mempool, but is there a way to see every new transaction that enters mempool? Like log to file whenever new unconfirmed Nov 7, 2023 · Spike in Bitcoin Trading Volume: When there’s a sudden surge in Bitcoin trading, it can lead to a large number of unconfirmed transactions, causing the Mempool to become congested. 0. 15. I suspect this is due to the very low transaction fee I set. There is no universal default expiration time, because each node is free to decide how long they want to retain unconfirmed transactions. If the network becomes congested, there may be a backlog of transactions in the mempool and Bitcoin unconfirmed transaction stuck. 518914f4ac11cdd2ba28ef6454ddd499511c000c434f733ac499c69c6b36179b In this video I show you why your Bitcoin transaction is still unconfirmed and show you how to use the mempool on your umbrel full node or hosted on mempool. It's not possible to cause a transaction in the mempool to expire (become invalid) at a certain time in the future, if not yet mined. By default, Bitcoin Core nodes do not accept transactions below the 1sat/vB minimum relay feerate (“minrelaytxfee”), do not verify any signatures before checking this requirement, and do not 1 day ago · The Mempool Accelerator lets users speed up their pending Bitcoin transactions for a fee using Lightning or Cash App. Oct 3, 2023 · Bitcoin’s Transaction Backlog Nears End as Ordinal Inscriptions Wane. In decentralized cryptocurrencies there is no global transaction mempool. That’s the Bitcoin mempool in a nutshell. 01835821 BTC Jun 17, 2023 · What is the Cause of an Unconfirmed Bitcoin Transaction? An unconfirmed Bitcoin transaction can occur due to low transaction fee rate, size of the transaction, or a backlog of transactions in the network. 00138502 BTC Oct 22, 2024 · Meanwhile, all other unconfirmed transactions that pay lower fees land in a backlog, otherwise known as mempool. bywxdyouxcxrbpidyrbrzwgmtrxfwetkgrnnzuqwmx