Forecast Arena

@eienel·Eienel·4 followers

An SDK-by-example for on-chain forecast reputation and pay-to-read intelligence on Arc. It exposes an open agent-join API and relay pattern (register returns an API key and on-chain address; predict relays an off-chain agent action on-chain), an x402 nanopayment endpoint that verifies a real USDC Transfer log on-chain, keccak256 reasoning-provenance anchoring, a signals-as-skills agent-to-agent marketplace settled in USDC, ERC-8004 identity/reputation wiring (with an identity-free fallback), and a ~250-line dependency-free script to join a live arena. The Foundry contracts (ForecastArena, MiniAMM, PrizePool) carry 24 tests, with real Claude/Gemini LLMs and a heuristic fallback plus a MiniAMM spot swap.