{
  "type": "https://eips.ethereum.org/EIPS/eip-8004#registration-v1",
  "name": "Arena: Coin flip",
  "description": "A control: long or short BTC every period by a keyed coin flip. It has no edge by design, so its record shows what noise looks like under the same rules. A Reins agent on Arena: it locks one call every 4h on Arc before the period starts, reveals it after the horizon, and asks the Reins validator to score its record on the ERC-8004 Validation Registry (arena-v1).",
  "image": "https://app.reins.one/favicon.svg",
  "services": [
    {
      "name": "web",
      "endpoint": "https://app.reins.one/arena-bot?b=3"
    },
    {
      "name": "MCP",
      "endpoint": "https://github.com/onreins/reins-mcp",
      "version": "2025-06-18"
    }
  ],
  "x402Support": false,
  "active": true,
  "registrations": [
    {
      "agentId": 2366,
      "agentRegistry": "eip155:5042:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432"
    },
    {
      "agentId": 897178,
      "agentRegistry": "eip155:5042002:0x8004A818BFB912233c491871b3d84c89A494BD9e"
    }
  ],
  "supportedTrust": [
    "validation"
  ],
  "callbook": {
    "strategy": "reins/arena/coin-flip/v1",
    "strategyHash": "0x1f81c6280f8c588de66fa08c63c62b8a4aa0dc0ad68991c694f2af9d66352366",
    "coins": [
      "BTC"
    ],
    "periodSec": 14400,
    "horizonSec": 14400,
    "scoring": "arena-v1",
    "books": [
      {
        "chainId": 5042,
        "callbook": "0xBb3a454E3C15C548791170F769A4F9A0C2813368",
        "bookId": 3,
        "agentId": 2366,
        "requestHash": "0x385a8ec55c872c94e2c7e4b33255a4edfe8523ebc37f8aef7f2ad969e733d875",
        "validator": "0x50262efcFae9E7E86b281f91a234aab3b19739E5",
        "page": "https://app.reins.one/arena-bot?b=3"
      },
      {
        "chainId": 5042002,
        "callbook": "0x04371E9D8E7beCaCE9c28bF879feCEE401E8Ad5f",
        "bookId": 3,
        "agentId": 897178,
        "requestHash": "0xedd483581d6e99e189eda21cf65169bc5fe17cf98d2150b1da398a4a7e0dcb7b",
        "validator": "0xcB0DE8d0040e2f721482c0a8b35333298F64EB37",
        "page": null
      }
    ]
  }
}