metamask-extension/test/data/fetch-mocks.json

{
  "gasPricesBasic": {
    "average": 85,
    "fast": 200,
    "safeLow": 80
  },
  "metametrics": {
    "mockMetaMetricsResponse": true
  },
  "swaps": {
    "featureFlags": {
      "bsc": {
        "mobile_active": false,
        "extension_active": true,
        "fallback_to_v1": true
      },
      "ethereum": {
        "mobile_active": false,
        "extension_active": true,
        "fallback_to_v1": true
      },
      "polygon": {
        "mobile_active": false,
        "extension_active": true,
        "fallback_to_v1": false
      }
    }
  }
}