metamask-extension/test/data/mock-estimates.json

{
  "fee-market": {
    "gasEstimateType": "fee-market",
    "gasFeeEstimates": {
      "low": {
        "minWaitTimeEstimate": 180000,
        "maxWaitTimeEstimate": 300000,
        "suggestedMaxPriorityFeePerGas": "3",
        "suggestedMaxFeePerGas": "53"
      },
      "medium": {
        "minWaitTimeEstimate": 15000,
        "maxWaitTimeEstimate": 60000,
        "suggestedMaxPriorityFeePerGas": "7",
        "suggestedMaxFeePerGas": "70"
      },
      "high": {
        "minWaitTimeEstimate": 0,
        "maxWaitTimeEstimate": 15000,
        "suggestedMaxPriorityFeePerGas": "10",
        "suggestedMaxFeePerGas": "100"
      },
      "estimatedBaseFee": "50",
      "networkCongestion": 0.5184,
      "latestPriorityFeeRange": ["1", "20"],
      "historicalPriorityFeeRange": ["2", "125"],
      "historicalBaseFeeRange": ["50", "100"],
      "priorityFeeTrend": "up",
      "baseFeeTrend": "down"
    },
    "estimatedGasFeeTimeBounds": {}
  }
}