GET /competition/{id}/participant/{wallet}

{
  "id": 10,
  "competitionId": 1,
  "walletAddress": "client|synthetic-wallet",
  "totalVolumeUsd": 1500.25,
  "keysEarned": 15,
  "keysSpent": 2,
  "grandPrizeEntry": true,
  "enrolledAt": "2026-08-01T00:00:00.000Z",
  "rank": 4,
  "availableKeys": {
    "total": 5,
    "canAfford": {
      "1": 0,
      "2": 1
    }
  },
  "chestOpens": [
    {
      "id": 100,
      "tierNumber": 1,
      "tierName": "Bronze",
      "keysUsed": 10,
      "status": "FULFILLED",
      "rewardPacks": [
        {
          "id": 1,
          "claimedBy": "client|synthetic-wallet",
          "claimedTransactionHash": "synthetic-transaction-hash",
          "items": [
            {
              "id": 1,
              "fulfillmentType": "galachain_mint",
              "fulfillmentSubType": "token",
              "collection": "SYNTHETIC",
              "category": "Unit",
              "type": "none",
              "additionalKey": "none",
              "quantity": 1,
              "dynamicMetadataId": "synthetic-metadata-id"
            }
          ]
        }
      ],
      "openedAt": "2026-08-01T00:00:00.000Z"
    }
  ]
}