Cardano Updates

dUSDCx

Add BEEP token metadata

Implements a faithful 1972 Atari Pong recreation that connects to the
MetaMask browser extension and rewards players with ETH for playing.

Game (pong/index.html):
- Vanilla JS + Canvas — no build step, open index.html directly
- Classic two-player local co-op (W/S vs ↑/↓), first to 11 wins
- Ball physics: angle-based paddle deflection, incremental speed-up
- Neon CRT aesthetic with ball trail and glow effects
- Responsive canvas scaling for any screen size
- MetaMask connect button (ethers.js v6 via CDN)
- Live pending-reward counter: +0.000010 ETH/rally, +0.0001 ETH/point,
  +0.0005 ETH win bonus
- Demo mode (no contract needed) + live mode when contract is deployed
- Claim Rewards button triggers MetaMask tx or demo modal

Smart contract (pong/contract/PongRewards.sol):
- Solidity 0.8.20, Hardhat-compatible
- Owner funds contract; players pull-claim their accrued ETH
- recordGame() / recordGameSelf() accrue rewards per session
- Per-session cap + hourly claim cooldown for anti-abuse
- Owner controls: setRates, setPaused, setRelayer, withdrawAll
- Full event log for off-chain indexing

Deployment tooling:
- hardhat.config.js wired for localhost / Sepolia / Mainnet
- deploy.js prints address and next steps
- README with quickstart, reward table, security notes

https://claude.ai/code/session_01E7hcwTtvR3c3XjozFsbpAa

Update actions/checkout from v2 to v4 in CI workflow

The checkout action was pinned to deprecated v2/v2.3.4 versions.
Updating to v4 brings security fixes, Node.js 20 runtime support,
and compatibility with current GitHub Actions runner environments.

https://claude.ai/code/session_012x2xVKvNxh8Y8E5tJ62a3Q