Consensus Mechanism
The rules for how a blockchain network agrees on which transactions are valid. It's how thousands of computers stay in sync.
Example
Ethereum switching from energy-heavy mining to staking in 2022, cutting energy use by 99% while staying secure.
Related Terms
Core Concepts
⚙️How It Works
- 1
Transaction Submission
User submits a transaction to the network
- 2
Broadcast
Transaction is shared with all nodes across the network
- 3
Validation
Nodes independently verify the transaction follows all rules
- 4
Block Proposal
A validator proposes a block containing valid transactions
- 5
Finalization
Majority agreement makes the block permanent and irreversible
⚖️Proof of Work vs Proof of Stake
| Feature | pow | pos |
|---|---|---|
| Security Method | Computing power | Staked capital |
| Energy Use | Very high | Very low (~99% less) |
| Entry Barrier | Hardware cost | Token stake |
| Examples | Bitcoin | Ethereum, Solana |
| Attack Cost | 51% of hashrate | 51% of stake |