Effective Proof of Stake (EPoS) (Harmony)
Web3 / mining staking
Effective Proof of Stake is Harmony's modified version of Proof of Stake that reduces validator rewards based on the percentage of total stake a validator controls, discouraging stake concentration and encouraging network decentralization. When a validator's stake exceeds a certain threshold, their rewards diminish proportionally, creating economic incentives to keep individual validators below a target size. This mechanism protects against the natural tendency of wealthy validators to accumulate more stake and power, a phenomenon known as stake centralization that can undermine network security and fairness in standard Proof of Stake systems. Example: Harmony's mainnet implements EPoS rules where validators exceeding 10% of total stake experience reduced reward multipliers, encouraging operators to either self-delegate less or run multiple independent validator nodes. Why it matters for mining and staking: EPoS directly addresses centralization risks inherent in Proof of Stake systems, ensuring fair participation rewards and distributed network control. This promotes healthier validator ecosystems and stronger security guarantees.
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