Cryptocurrency transactions are confirmed on several blockchains, which can sometimes be overloaded. When this happens, you should include a higher transaction fee when sending funds so that the transaction is confirmed faster, otherwise you get stuck in the blockchain queue for long periods of time. Currently, bitcoin network traffic is unusually high due to the growing demand for block transactions. Block sizes are limited, so this means that transactions that exceed a block's capacity get stuck in a queue for bitcoin miners to confirm.
This queue of unconfirmed transactions is called a bitcoin mempool. A Bitcoin transaction often goes through several confirmations on the blockchain before it is completely erased. This is because there is a risk that unconfirmed transactions can be reversed or that the cryptocurrency will be spent twice. A commit occurs every time a new block is created.
Our nodes may lose synchronization with the rest of the network for short periods of time. This can cause transactions to remain in Pending status longer than normal. Usually, the delay is less than an hour and the transaction will eventually take place normally. At least, the way it's used today, it does.
Blockchain relies on encryption to provide its security and establish consensus on a distributed network. This essentially means that, in order to “prove that a user has permission to write to the chain, complex algorithms must be executed, which in turn require large amounts of computing power. Of course, this comes at a cost. Taking as an example the most well-known and widely used blockchain, Bitcoin, last year it was stated that the computing power required to keep the network running consumes as much energy as that used by 159 of the world's nations.
Although its potentially revolutionary applications are evident once the effort has been made to understand the principles of encryption and distributed ledger behind the blockchain, it takes a while, and a little reading, before the “man in the street” can see what makes blockchains potentially so useful. Technology experts talk about replacing the intermediary facilities traditionally provided by the financial services industry, such as payment clearing and fraud prevention. But as far as many are concerned, banks provide this service adequately, at a seemingly low cost to the end user. Here is a breakdown of some of the problems with blockchain that anyone thinking about using it should understand.
Before they are processed, transactions will not be recorded on the blockchain, as Mempool can still refuse them if fees are too low. Transactions on the Bitcoin network itself are not controlled or confirmed by BitPay, but by bitcoin miners, who group transactions into blocks and add those blocks to the Bitcoin blockchain, the shared historical record of all transactions. It is conceivable that, if they decide it is in their interest, the established financial services industry could, if not end the blockchain, drastically reduce its usefulness and restrict its availability. Popular cryptocurrency blockchains such as Bitcoin and Litecoin have been subjected to spam and dust attacks.
However, you shouldn't worry too much, as it will be processed whenever there is a massive pause in the Bitcoin blockchain and miners have nothing else to do. However, in my opinion, while these five problems could pose significant obstacles, blockchain technology is likely to evolve in the coming years. In theory, the principle extends to blockchain networks, which are used for something other than a store of value, for example, recording transactions or interactions in an IoT environment. Again, due to their complexity and their encrypted and distributed nature, blockchain transactions can take a while to process, no doubt compared to “traditional” payment systems, such as cash or debit cards.
Bitcoin transactions are confirmed by network nodes through cryptography and recorded on the blockchain, a public distributed ledger. Global events could rekindle an appetite for change, but until they do, blockchain could remain difficult for many to sell. The bitcoin transactions that are sent are grouped into a large queue called a mempool (also known as a memory pool) until the miners (who validate the new transactions and record them on the blockchain) confirm it. When a blockchain network experiences traffic spikes, it causes delays, a delay in transactions, and also increases transaction fees, as demand exceeds supply and miners can choose what they process.