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Staking is a decentralization-based consensus system that aims to strengthen the Bitcoin network. The most common form of this is PoW (Proof-of-Work) where miners put in work to achieve consensus. PoS (Proof of Stake) is another popular consensus scheme. In PoS, validators stake (or lock) some of their wealth in order to be eligible to forge blocks in the chain. With this, Harmony has become the first sharding-based blockchain project to have integrated staking into its infrastructure.