How Does a Transaction Get Added to the Mempool?
A transaction is created by a user and then broadcast to the network. Nodes that receive the transaction first validate it against a set of rules (e.g. correct format, valid signature, sufficient funds).
If valid, the node adds it to its local mempool and relays it to its peers.
Glossar
Transaction
Execution ⎊ A Transaction is the atomic unit of action recorded on a distributed ledger, representing the initiation and confirmation of a value transfer, a smart contract interaction, or the settlement of a derivative trade.
Mempool
Propagation ⎊ The mempool, within cryptocurrency networks, functions as a temporary holding area for unconfirmed transactions awaiting inclusion in a block.
Bitcoin
Architecture ⎊ Bitcoin, within a cryptocurrency context, represents a decentralized, peer-to-peer electronic cash system predicated on cryptographic proof rather than requiring a trusted third party.