Proof of Stake

A consensus mechanism where validators stake tokens to secure the network.

Proof of Stake (PoS) is a consensus mechanism that selects validators to create new blocks based on the amount of cryptocurrency they have "staked" (locked up) as collateral. It's an alternative to Proof of Work that requires significantly less energy.

How It Works

Validators lock up a certain amount of tokens as a stake. The network randomly selects validators to propose new blocks, with selection probability proportional to the amount staked. Validators who act maliciously can have their stake "slashed" (partially or fully confiscated).

Advantages Over Proof of Work

Energy Efficiency: PoS uses ~99.95% less energy than PoW.

Lower Barrier: No expensive mining hardware required.

Alignment: Validators have a direct financial stake in the network's health.

Notable PoS Networks

Ethereum (since The Merge), Solana, Cardano, Polkadot, Avalanche, and Cosmos all use variations of Proof of Stake.

Frequently Asked Questions

What is Proof of Stake?

Proof of Stake (PoS) is a consensus mechanism where validators lock up cryptocurrency as collateral to earn the right to validate transactions. It uses ~99.95% less energy than Proof of Work and is used by Ethereum, Solana, Cardano, and many others.

How much can you earn from staking?

Staking yields vary by network: Ethereum ~3-5% APR, Solana ~6-8%, Cosmos ~15-20%. Returns come from newly minted tokens and transaction fees. Higher yields often come with higher inflation or risk.

What is slashing in Proof of Stake?

Slashing is the penalty for validator misbehavior (double-signing, extended downtime). A portion of the validator's staked tokens is destroyed, creating a strong economic incentive for honest, reliable operation.