How It Works
Aptos uses AptosBFT, a variant of HotStuff BFT consensus providing sub-second finality across a rotating leader model. The Block-STM (Software Transactional Memory) parallel execution engine processes transactions speculatively in parallel — most succeed without conflict, and conflicting transactions are automatically re-executed. This approach differs from Sui's object model: Aptos maintains traditional accounts, making it more familiar to Ethereum developers. The Move Prover formally verifies smart contract correctness, a rare capability that enables on-chain auditing during deployment.
Consensus Mechanism: Proof of Stake (AptosBFT)
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 (AptosBFT) |
| Launched | 2022 |
| Founder | Mo Shaikh & Avery Ching |