波卡（DOT）代幣經濟學

Polkadot’s native token, DOT, underpins the network’s security, governance, and parachain ecosystem. Its token economics are multifaceted, supporting a dynamic, scalable, and incentive-aligned blockchain environment. Below is a comprehensive breakdown of DOT’s issuance, allocation, usage, incentive, and locking mechanisms, including unlocking times.

Issuance Mechanism

• Initial Supply: DOT launched with an initial supply of 1 billion tokens.
• Inflation: DOT is an inflationary token. As of April 2024, the total supply had increased to approximately 1.43 billion due to annual inflation.
• Staking-Driven Inflation: The annual inflation rate is dynamically determined by the network’s “ideal staking rate” (which varies between 45% and 75% depending on the number of active parachain slots). When the system’s actual staking rate matches the ideal, all new DOT is distributed to stakers; otherwise, the remainder is allocated to the treasury.

Allocation Mechanism

• Parachain Slot Auctions: DOT is used to bid for parachain slots via a candle auction mechanism. Winning bids result in DOT being locked for the duration of the slot lease (up to 96 weeks).
• Crowdloans: Community members can contribute DOT to support projects in parachain slot auctions. All contributed DOT is locked for the lease duration and returned after expiration.
• Treasury: DOT not distributed to stakers is allocated to the on-chain treasury, which funds ecosystem development, grants, and bounties.

Usage and Incentive Mechanism

• Staking (Nominated Proof-of-Stake, NPoS):
  • Users can become validators or nominators. Validators secure the network and produce blocks, while nominators back validators with their stake.
  • Rewards are distributed based on “era points,” reflecting validator activity rather than just stake size.
• Governance:
  • DOT holders participate in on-chain governance, voting on proposals and referenda. Voting power can be increased by locking DOT for longer periods.
• Parachain Participation:
  • DOT is required for parachain slot auctions and crowdloans, incentivizing active participation in network expansion.
• Treasury Proposals and Bounties:
  • DOT funds are used for ecosystem proposals, with curators and contributors rewarded for their work.

Locking Mechanism

• Parachain Slot Auctions:
  • DOT is locked for the entire lease period (up to 96 weeks). After the lease, DOT is unlocked and returned to contributors.
• Governance Voting:
  • DOT can be locked to increase voting power. The longer the lock (up to 896 days), the greater the voting multiplier (up to 6x per DOT).
• Staking:
  • Staked DOT is locked for the duration of participation. Unstaking initiates an unbonding period before tokens become liquid.

Unlocking Time

• Parachain Slot Leases:
  • DOT is unlocked at the end of the lease (typically 96 weeks).
• Governance Locks:
  • Unlocking occurs after the chosen lock period (up to 896 days).
• Staking Unbonding:
  • There is a set unbonding period after unstaking before DOT becomes transferable.

Summary Table

Evolution: Polkadot 1.0 vs. 2.0

• Polkadot 1.0: Static core allocation—each parachain statically locked to a core, leading to inefficiencies.
• Polkadot 2.0: Dynamic core allocation—parachains share and dynamically occupy cores, optimizing resource use and scalability.

Key Takeaways

• DOT’s economics are designed to balance network security, governance, and ecosystem growth.
• Locking and unlocking mechanisms are central to incentivizing long-term participation and network health.
• The transition to dynamic core allocation in Polkadot 2.0 further enhances efficiency and scalability.

Polkadot’s token model is a sophisticated blend of inflationary issuance, incentive-aligned staking, flexible governance, and innovative resource allocation, all underpinned by robust locking and unlocking mechanisms to ensure network security and active participation.