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Stretch Goals Feature - Reconnaissance (Crowdfund)

Entrypoints & Functions

  • set_stretch_goals(env: Env, milestones: Vec<i128>) (Auth: Organizer)
    • Validates milestones are strictly increasing.
    • Stores them in DataKey::StretchGoals.
    • Bug found: It currently immediately publishes StretchGoalReachedEvent for all milestones when setting them!
  • check_stretch_goals(env: &Env, new_raised: i128) (Internal)
    • Called automatically during pledging.
    • Checks if new_raised >= threshold for each milestone.
    • Marks DataKey::StretchTriggered(idx) as true.
    • Publishes StretchGoalReachedEvent for newly crossed milestones.

State Transitions

  • DataKey::StretchGoals: Set by set_stretch_goals.
  • DataKey::StretchTriggered(u32): Set to true by check_stretch_goals when crossed.

Events

  • StretchGoalReachedEvent { milestone_index: u32, threshold: i128 }
    • Emitted (incorrectly) in set_stretch_goals.
    • Emitted correctly in check_stretch_goals when threshold is met.

Panics / Errors

  • NotInitialized: set_stretch_goals called before contract is initialized (Organizer missing).
  • NotAuthorized: caller is not the organizer.
  • InvalidGoal: if milestones are not strictly increasing (m <= prev).

Overflow Surfaces

  • milestones elements are i128. Check against i128::MAX.
  • new_raised could be large, boundary values at exact threshold, threshold-1, threshold+1.

Plan

Create contracts/crowdfund/src/tests/test_feature_205.rs. Test happy path (set goals, pledge to cross them, check state/events). Test auth checks (non-organizer setting goals). Test boundary conditions (overflow/underflow, off-by-one). Test storage rollback on panic.