In the Bitcoin network, anyone can run a computer program called a “Full Node”.
A Full Node downloads the entire history of transactions from day one and verifies every new transaction against strict consensus rules.
🛡️ Why Nodes Matter
Even if a powerful miner tries to cheat by creating fake coins or altering past transactions, individual nodes will immediately flag it as invalid and reject it. Nodes ensure that power remains decentralized.
🧠 Today's Key Takeaway
- Full Nodes maintain copies of the ledger and enforce rules independently.
- No single entity can change the rules without node consensus.
