[Contract]-Bonus matches with a points multiplier

[grantfox-oss]

Creators may want to make certain matches (e.g. a tournament final) worth more
than others to build excitement toward the end of a campaign.

Goal

Let a creator mark a match with a points_multiplier (e.g. 2 = double
points). Grading (Issue 3) multiplies the earned points by this value.

Requirements

1. Match struct gains:

   pub points_multiplier: u32, // 1 = normal (default), 2 = double, etc.

2. r#match::create_match (Issue 1) gains an optional
   points_multiplier: u32 param. New MatchError variant:

   • InvalidPointsMultiplier = 7 — points_multiplier == 0 || points_multiplier > 3
     (cap at 3x to keep totals bounded; document the cap as a named constant
     MAX_POINTS_MULTIPLIER in storage_types.rs)
   • If you don't want to change create_match's signature again so soon
     after Issue 1, an acceptable alternative is a separate
     set_match_points_multiplier(caller, match_id, multiplier) admin/creator-only
     function called before the match starts. Pick whichever the maintainers
     prefer — flag this in the PR description.

3. Grading change in oracle::submit_match_result (from Issue 3):

   let base_points = if exact_correct { POINTS_CORRECT_RESULT + POINTS_EXACT_SCORE }
                      else if result_correct { POINTS_CORRECT_RESULT }
                      else { 0 };
   let points = base_points * match_record.points_multiplier;

4. list_event_matches / get_match naturally surface points_multiplier
   since it's just a struct field — no extra view needed, but confirm the
   frontend types doc (if any) is updated.

Acceptance criteria

• Matches default to points_multiplier == 1 (no behavior change for
  existing/normal matches)
• A 2x match awards 0 / 2 / 8 points instead of 0 / 1 / 4
• Multiplier is validated at creation (1–3 inclusive)

Testing checklist

• test_create_match_with_double_points_multiplier
• test_create_match_invalid_multiplier_rejected — 0 and 4 both rejected
• test_grading_applies_points_multiplier — 2x match, exact score → points_earned == Some(8)
• test_leaderboard_reflects_multiplied_points (integration with Issue 4)

[jaynomyaro]

Hi! I’m a full-stack developer with a strong blockchain background. I’d love to handle this issue and can deliver a clean, reliable solution. Kindly assign it to me.

[sheyman546]

please i will love to work on this issue and i will submit within 24hr and with a quality pr

[Menjay7]

Hi! I came across this issue and would love to work on it. I have experience with similar tasks and I'm confident I can investigate, implement a clean solution, and thoroughly test it before submitting a PR. If the issue is still open, I would appreciate it if you could assign it to me. Thank you!

[anoncon]

Hi
I’d like to work on this issue if it’s available. I’m a full-stack Web2 & Web3 developer with solid open-source experience and can start working on it right away.

[samsolo247]

Hi Maintainer,

I’m a smart contract and full-stack developer and would love to contribute to this issue. I’m an experienced contributor with hands-on expertise in Rust, Soroban, Cairo, and TypeScript.

I’m passionate about building secure, scalable blockchain solutions, with a strong emphasis on writing clean and maintainable code. Based on the scope of this issue, I’m confident I can deliver a complete solution within 24 hours of assignment.

I’d greatly appreciate the opportunity to contribute and help move this forward.

[ghost-cy829]

I would like to work on this issue. I have experience with Rust and Soroban smart contract development. I will follow the acceptance criteria and add tests. Excited to contribute. Kindly assign.