Midnight Network Leaderboard DApp

A privacy-preserving leaderboard where players submit scores on-chain with three display modes and prove they own an entry using verifyOwnership — a ZK circuit that checks ownerCommitment(secretKey) matches the stored ownerHash without revealing the secret.

Runnable template: Copy templates/leaderboard-dapp/ for a complete Next.js project (contract + UI). Run npm install && npm run compact && npm run sync:assets && npm run dev after installing the 1AM wallet.

What this skill produces:

• contract/ — Compact leaderboard + TypeScript witnesses + compile scripts
• app/leaderboard/ — Next.js client UI (click game, privacy mode picker, leaderboard table)
• lib/midnight.ts — wallet session + patched indexer provider (copy from references/midnight-session.md or templates/leaderboard-dapp/lib/midnight.ts)
• lib/leaderboard.ts — deploy, submitScore, verifyOwnership, ledger decode
• lib/display-name.ts — decode anonymous hash bytes to generated names ("Crimson Tiger")
• public/zk/leaderboard/ — ZK proving assets synced from contract build

Shared references (canonical provider + troubleshooting — do not duplicate in prompts):

• references/midnight-session.md — createConnectedSession, indexer patch, deploy/call helpers
• references/gotchas.md — preprod deploy hangs, GraphQL offset: null, ZK asset paths
• references/versions.json — pinned @midnight-ntwrk/* versions