Market.reveal_prediction() tier-3

[GoSTEAN]

Description: Reveal phase. Users present outcome, amount, salt; contract verifies the commitment and updates pools/odds.

Acceptance Criteria:

• Auth required; user must have prior commit
• Recompute hash(outcome + amount + salt) matches stored commit_hash
• Update YES/NO pool, odds, total_volume
• Move from pending commits to predictions map; clear pending entry
• Emit PredictionRevealed(user, market_id, outcome, amount)
• Unit + integration tests implemented and passing

Tests (minimum):

• Happy path reveal updates pools and odds
• Wrong salt/hash rejected
• Reveal without commit rejected
• YES and NO paths both verified
• Event payload correct

Files: contracts/contracts/boxmeout/src/market.rs
Dependencies: commit_prediction implemented; USDC token

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[Sandijigs]

@Sandijigs has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

hi My name is Sandra.
I have reviewed the issue and understand what needs to be done
I am a fullstack software/ Blockchain Engineer with over 6years of experience web2 experience(Fullstack) and 2 year web3 experience (JavaScript,TypeScript, Rust ,Python, Soroban,Solidity,(Backend, frontend, Mobile and smart contracts) ). I have contributed to several projects in the stellar ecosystem. . please Assign this Issue to me

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[aguilar1x]

@aguilar1x has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

Hey, I’m Matias Aguilar full-stack & smart contract dev in the Stellar ecosystem and Parhfinder role in stellar community.

I’ve been building RWA tooling and DeFi apps with Soroban, and I love tackling technical challenges with fast-moving teams. Super excited to jump in and help with this one!

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Congratulations, @aguilar1x! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on January 31, 2026.

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This issue has been marked as completed by a Drips Wave moderator for @aguilar1x as part of the Stellar Wave Program's 1st Wave 🥳

Moderator's reason: Substantial work has been submitted in PR:#44, but was not reviewed/merged within the Wave.

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ℹ️ Note: This issue was marked complete via moderation. Points were issued even though the GitHub issue remains open.