PoS is used in Decred to validate PoW mining work and approve or reject proposed rule changes to the consensus protocol. Decred holders time-lock, or stake DCR to obtain voting tickets. Ticket holders currently earn 5.80 DCR per block (1.16 per ticket * 5 tickets per block), or 30% of the block reward for voting.

Decred uses a lottery system to select the active voting tickets for a block from a pool based on pseudorandomness contained in the block header. Each ticket is randomly selected to vote from a current pool of 40,820 tickets using a Poisson distribution with an average selection time of ~ 28 days and a maximum time of ~ 142 days (4.7 months). If a ticket is not selected (0.5% chance), it expires and the original ticket price is refunded. Once a ticket has voted, missed or expired, the funds (ticket price plus the block reward minus the ticket fee) enter a 256 block (~ 20 hours) waiting period before being returned to the owner. Factoring in immaturity periods, Decred has an average staking lock-up of 30.74 days (29.07 days + 1.67 day immaturity period), though it can be as long as ~ 144 days.

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