A Bitcoin transaction is a digital movement of BTC from one wallet address to another. But how exactly does this process work behind the scenes?
In this guide, we’ll break down how Bitcoin transactions happen — from a user’s point of view to what’s going on in the blockchain network.
Let’s say Ironman wants to send 1 BTC to Batman. Here’s how the transaction would unfold:
Ironman uses a software wallet installed on his laptop. To begin, he opens the app and selects “Send Bitcoin.”
Batman sends his BTC address (a long string of characters) to Ironman. This address tells the blockchain where to send the funds.
He copies Batman’s address, enters 1 BTC, double-checks everything, and hits “Send”.
Ironman’s wallet:
Once Ironman sends the transaction, here’s what happens in the Bitcoin network:
Ironman’s wallet connects to a Bitcoin node and sends:
The node checks:
If yes, the transaction is considered valid and passed to other nodes.
All valid transactions go into a temporary waiting area called the mempool.
Bitcoin miners select transactions from the mempool and group them into a block.
They compete to solve a complex math puzzle. The first to succeed “mines” the block and broadcasts it to the network.
Once verified, the block gets added to the Bitcoin blockchain. At this point:
Each additional block built on top of this one counts as another confirmation. Six confirmations is considered secure.
Bitcoin nodes (computers) around the world maintain and sync identical versions of the blockchain. Here’s what they do:
This decentralized consensus mechanism ensures that every transaction is trustworthy and tamper-resistant.
Miners are rewarded with:
Currently, each block rewards miners with 6.25 BTC, but this gets halved every four years in an event called the Bitcoin Halving.
Here’s what happens when you send Bitcoin:
Bitcoin’s network is fully transparent, secure, and runs without a central authority — making every transaction visible and verifiable on the blockchain.
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