Transactions are considered having occurred when they’re included in a brand new web page within the listing of all Bitcoin transactions.
Every web page within the listing known as a “block”. The listing itself is a transaction journal referred to as the Bitcoin “blockchain”.
Each Bitcoin pockets that works as Bitcoin’s inventor initially meant will speak to some close by wallets (or different “nodes” within the Bitcoin community) to search out out about new unconfirmed transactions and new pages (blocks) within the transaction journal (blockchain). They every preserve their very own copy of the entire listing from the start of Bitcoin in 2008. This course of known as “synchronising”.
Some wallets could discard previous blocks which can be not of curiosity. That is referred to as pruning. It is not actually related to your state of affairs but when I do not point out it, somebody could really feel the necessity to level this out.
By speaking with others on the community, a pockets could uncover that it lacks particulars of some current transactions and inform you it’s “synchronising”.
If you ask a pockets to pay somebody. the pockets creates a transaction we name an unconfirmed transaction. This is sort of a draft transaction.
The unconfirmed transaction is simply considered having actually occurred when it’s added to a brand new web page (block) of the transaction listing (blockchain) by a miner. That is referred to as a affirmation of the transaction.
Till a pockets is synchronised, it might not find out about particulars of current transactions and so could not but know the end result of current transactions it has created.