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37. Time-Locks and Vesting

Block-height based authorization.

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Contracts enforce time-locks by comparing `burn-block-height` or `block-height` against scheduled target thresholds.

clarity
(asserts! (>= burn-block-height unlock-height) (err u400))

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Check your understanding

  1. 1. Why prefer burn-block-height over Stacks fast block height for vesting schedules?

  2. 2. What happens if an assertion against block-height fails?

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