How It Works
Avalanche uses a novel consensus called Snowman, which operates through repeated random sub-sampling: each validator repeatedly queries small random subsets of other validators, and through iterated gossip, the network converges on consensus without a leader in under 1 second. The three built-in chains serve different purposes: the C-Chain (Contract Chain) is an EVM-compatible smart contract chain, the P-Chain (Platform Chain) coordinates validators and Subnets, and the X-Chain (Exchange Chain) handles AVAX transfers using a DAG structure. Avalanche Subnets allow any entity to launch a custom blockchain with its own validator set, VM, and rules while optionally requiring validators to also stake the C-Chain.
Consensus Mechanism: Proof of Stake (Snowman)
Proof of Stake consensus selects block proposers based on the amount of cryptocurrency staked as collateral. Validators risk losing their stake (slashing) if they act dishonestly, creating economic security without energy expenditure. Stake-weighted selection means larger stakers have proportionally greater influence on block production.
Key Architecture Facts
| Category | Layer 1 |
| Consensus | Proof of Stake (Snowman) |
| Launched | 2020 |
| Founder | Emin Gün Sirer |