{
  "schemaVersion": 1,
  "article": 6054,
  "reviewedAt": "2026-09-01",
  "evidenceBoundary": {
    "readOnly": true,
    "fixedPublicTransactions": 4,
    "feeHistoryBlockCountPerChain": 1024,
    "estimateScenarioCount": 8,
    "walletConnected": false,
    "transactionSent": false,
    "signatureCreated": false,
    "apiSecretUsed": false,
    "personalBalanceRead": false,
    "rankingClaim": false
  },
  "formulaBoundary": {
    "baseReceipt": "total = gasUsed * effectiveGasPrice + l1Fee + operatorFee; operatorFee is zero for both sampled Base transactions",
    "arbitrumReceipt": "total = gasUsed * effectiveGasPrice; poster = gasUsedForL1 * effectiveGasPrice; execution = total - poster",
    "baseEstimate": "50,000 execution-gas assumption plus GasPriceOracle.getL1FeeUpperBound(unsignedTxSize); this is not a final receipt",
    "arbitrumEstimate": "NodeInterface.gasEstimateComponents; gasEstimateForL1 is a poster-cost buffer denominated in child-chain gas",
    "blobField": "Base Jovian blobGasUsed is the transaction DA footprint; it is not proof that the user transaction directly consumed that amount of Ethereum blob gas"
  },
  "chains": {
    "base": {
      "name": "Base Mainnet",
      "chainId": "8453",
      "rpcAlias": "official-public-base",
      "receiptBlock": {
        "number": "50713856",
        "hash": "0x58d4b2fa8584e80e252bb61a3471c1380abc5c16fe3c3e70a23957b1389d5c30",
        "timestamp": "2026-08-31T22:57:39.000Z",
        "baseFeePerGasWei": "5000000",
        "daFootprint": "3477556"
      },
      "operatorParameters": {
        "operatorFeeScalar": "0",
        "operatorFeeConstant": "0",
        "daFootprintGasScalar": "148"
      },
      "feeHistory": {
        "method": "eth_feeHistory",
        "blockCount": 1024,
        "oldestBlock": "50712977",
        "newestBlock": "50714000",
        "observedMinimum": {
          "blockNumber": "50712977",
          "baseFeePerGasWei": "5000000"
        },
        "observedMaximum": {
          "blockNumber": "50713955",
          "baseFeePerGasWei": "5030833"
        },
        "scope": "fixed 1024-block observation window; not a long-term minimum, maximum, average, or SLA"
      },
      "receiptSamples": [
        {
          "sample": "zero-calldata-transfer",
          "transactionHash": "0xbdc017ca8e5bd53df7d9541b182ca9853e82ed6dcdd8c5bab2bfd07a700ade61",
          "blockNumber": "50713856",
          "blockHash": "0x58d4b2fa8584e80e252bb61a3471c1380abc5c16fe3c3e70a23957b1389d5c30",
          "observedAt": "2026-08-31T22:57:39.000Z",
          "transactionType": "2",
          "inputBytes": 0,
          "status": "1",
          "gasUsed": "21000",
          "effectiveGasPriceWei": "6000000",
          "executionFeeWei": "126000000000",
          "l1DataFeeWei": "487492768",
          "operatorFeeWei": "0",
          "totalFeeWei": "126487492768",
          "totalFeeEth": "0.000000126487492768",
          "receiptFields": {
            "l1GasUsed": "1600",
            "l1GasPrice": "48832874",
            "l1BaseFeeScalar": "2269",
            "l1BlobBaseFee": "2938256",
            "l1BlobBaseFeeScalar": "1055762",
            "blobGasUsed": "14800",
            "daFootprintGasScalar": "148"
          },
          "reconciles": true
        },
        {
          "sample": "large-calldata-contract-call",
          "transactionHash": "0x24609ff47cfd9c5ee325a86a172298a9cdba658dcd74c6415be89848a08fbf05",
          "blockNumber": "50713856",
          "blockHash": "0x58d4b2fa8584e80e252bb61a3471c1380abc5c16fe3c3e70a23957b1389d5c30",
          "observedAt": "2026-08-31T22:57:39.000Z",
          "transactionType": "2",
          "inputBytes": 1348,
          "status": "1",
          "gasUsed": "755382",
          "effectiveGasPriceWei": "6200000",
          "executionFeeWei": "4683368400000",
          "l1DataFeeWei": "1280823388",
          "operatorFeeWei": "0",
          "totalFeeWei": "4684649223388",
          "totalFeeEth": "0.000004684649223388",
          "receiptFields": {
            "l1GasUsed": "4203",
            "l1GasPrice": "48832874",
            "l1BaseFeeScalar": "2269",
            "l1BlobBaseFee": "2938256",
            "l1BlobBaseFeeScalar": "1055762",
            "blobGasUsed": "38776",
            "daFootprintGasScalar": "148"
          },
          "reconciles": true
        }
      ],
      "estimateScenarios": [
        {
          "sample": "observed-window-min-small",
          "blockNumber": "50712977",
          "blockHash": "0x64e421d37fe8a8c7f7115999bf0d47ce4ceeba8377f30d992f37cc43ca11a308",
          "observedAt": "2026-08-31T22:28:21.000Z",
          "unsignedTransactionBytes": 200,
          "executionGasAssumption": "50000",
          "headerBaseFeePerGasWei": "5000000",
          "executionFeeWei": "250000000000",
          "l1FeeUpperBoundWei": "1363923801",
          "operatorFeeWei": "0",
          "totalUpperBoundWei": "251363923801",
          "totalUpperBoundEth": "0.000000251363923801"
        },
        {
          "sample": "observed-window-min-large",
          "blockNumber": "50712977",
          "blockHash": "0x64e421d37fe8a8c7f7115999bf0d47ce4ceeba8377f30d992f37cc43ca11a308",
          "observedAt": "2026-08-31T22:28:21.000Z",
          "unsignedTransactionBytes": 2200,
          "executionGasAssumption": "50000",
          "headerBaseFeePerGasWei": "5000000",
          "executionFeeWei": "250000000000",
          "l1FeeUpperBoundWei": "13057659001",
          "operatorFeeWei": "0",
          "totalUpperBoundWei": "263057659001",
          "totalUpperBoundEth": "0.000000263057659001"
        },
        {
          "sample": "observed-window-max-small",
          "blockNumber": "50713955",
          "blockHash": "0x2c1be1748304565ee201d578d65c17fd167f903a1fc4617aa1fb0bc8ae99c9ab",
          "observedAt": "2026-08-31T23:00:57.000Z",
          "unsignedTransactionBytes": 200,
          "executionGasAssumption": "50000",
          "headerBaseFeePerGasWei": "5030833",
          "executionFeeWei": "251541650000",
          "l1FeeUpperBoundWei": "889502027",
          "operatorFeeWei": "0",
          "totalUpperBoundWei": "252431152027",
          "totalUpperBoundEth": "0.000000252431152027"
        },
        {
          "sample": "observed-window-max-large",
          "blockNumber": "50713955",
          "blockHash": "0x2c1be1748304565ee201d578d65c17fd167f903a1fc4617aa1fb0bc8ae99c9ab",
          "observedAt": "2026-08-31T23:00:57.000Z",
          "unsignedTransactionBytes": 2200,
          "executionGasAssumption": "50000",
          "headerBaseFeePerGasWei": "5030833",
          "executionFeeWei": "251541650000",
          "l1FeeUpperBoundWei": "8515735364",
          "operatorFeeWei": "0",
          "totalUpperBoundWei": "260057385364",
          "totalUpperBoundEth": "0.000000260057385364"
        }
      ]
    },
    "arbitrum": {
      "name": "Arbitrum One",
      "chainId": "42161",
      "rpcAlias": "official-public-arbitrum-one",
      "receiptBlock": {
        "number": "500440832",
        "hash": "0xe42b2e01306165226d08f4b609c445e7e30ed1372ecc5dfede66201f2d18d33e",
        "timestamp": "2026-08-31T22:59:43.000Z",
        "baseFeePerGasWei": "20000000"
      },
      "feeHistory": {
        "method": "eth_feeHistory",
        "blockCount": 1024,
        "oldestBlock": "500440468",
        "newestBlock": "500441491",
        "observedMinimum": {
          "blockNumber": "500440470",
          "baseFeePerGasWei": "20000000"
        },
        "observedMaximum": {
          "blockNumber": "500441487",
          "baseFeePerGasWei": "21248000"
        },
        "scope": "fixed 1024-block observation window; not a long-term minimum, maximum, average, or SLA"
      },
      "receiptSamples": [
        {
          "sample": "short-calldata-contract-call",
          "transactionHash": "0xb7bbde476fdf093fc600e4b39916e9795157913e2a54a78bdfd7232813283de5",
          "blockNumber": "500440832",
          "blockHash": "0xe42b2e01306165226d08f4b609c445e7e30ed1372ecc5dfede66201f2d18d33e",
          "observedAt": "2026-08-31T22:59:43.000Z",
          "transactionType": "2",
          "inputBytes": 4,
          "status": "1",
          "gasUsed": "1470652",
          "gasUsedForL1": "85",
          "executionGas": "1470567",
          "effectiveGasPriceWei": "20000000",
          "executionFeeWei": "29411340000000",
          "posterFeeWei": "1700000000",
          "totalFeeWei": "29413040000000",
          "totalFeeEth": "0.00002941304",
          "l1BlockNumber": "25878402",
          "timeboosted": false,
          "reconciles": true
        },
        {
          "sample": "large-calldata-contract-call",
          "transactionHash": "0x7951759d7fb4eec78894870ffe91bc7d53bd8d43d8e0c9cd16b4ebea643d636e",
          "blockNumber": "500440832",
          "blockHash": "0xe42b2e01306165226d08f4b609c445e7e30ed1372ecc5dfede66201f2d18d33e",
          "observedAt": "2026-08-31T22:59:43.000Z",
          "transactionType": "2",
          "inputBytes": 814,
          "status": "1",
          "gasUsed": "159833",
          "gasUsedForL1": "280",
          "executionGas": "159553",
          "effectiveGasPriceWei": "20000000",
          "executionFeeWei": "3191060000000",
          "posterFeeWei": "5600000000",
          "totalFeeWei": "3196660000000",
          "totalFeeEth": "0.00000319666",
          "l1BlockNumber": "25878402",
          "timeboosted": false,
          "reconciles": true
        }
      ],
      "estimateScenarios": [
        {
          "sample": "observed-window-min-small",
          "blockNumber": "500440470",
          "blockHash": "0x5de350693f7947a5317050eba9bb96801d744d1d250fc6462d1fe3cd2cdcb7a5",
          "observedAt": "2026-08-31T22:58:12.000Z",
          "inputBytes": 4,
          "headerBaseFeePerGasWei": "20000000",
          "nodeInterfaceBaseFeeWei": "20010000",
          "l1BaseFeeEstimateWei": "906777",
          "gasEstimate": "21347",
          "gasEstimateForL1": "117",
          "executionGas": "21230",
          "executionFeeWei": "424812300000",
          "posterFeeWei": "2341170000",
          "totalEstimateWei": "427153470000",
          "totalEstimateEth": "0.00000042715347",
          "reconciles": true
        },
        {
          "sample": "observed-window-min-large",
          "blockNumber": "500440470",
          "blockHash": "0x5de350693f7947a5317050eba9bb96801d744d1d250fc6462d1fe3cd2cdcb7a5",
          "observedAt": "2026-08-31T22:58:12.000Z",
          "inputBytes": 2048,
          "headerBaseFeePerGasWei": "20000000",
          "nodeInterfaceBaseFeeWei": "20010000",
          "l1BaseFeeEstimateWei": "906777",
          "gasEstimate": "56302",
          "gasEstimateForL1": "1767",
          "executionGas": "54535",
          "executionFeeWei": "1091245350000",
          "posterFeeWei": "35357670000",
          "totalEstimateWei": "1126603020000",
          "totalEstimateEth": "0.00000112660302",
          "reconciles": true
        },
        {
          "sample": "observed-window-max-small",
          "blockNumber": "500441487",
          "blockHash": "0x6fb0e1285fd0c3f2b78c666e527d21b438a5278658f973af14b1cedfc77784d4",
          "observedAt": "2026-08-31T23:02:27.000Z",
          "inputBytes": 4,
          "headerBaseFeePerGasWei": "21248000",
          "nodeInterfaceBaseFeeWei": "20004000",
          "l1BaseFeeEstimateWei": "1227199",
          "gasEstimate": "21389",
          "gasEstimateForL1": "159",
          "executionGas": "21230",
          "executionFeeWei": "424684920000",
          "posterFeeWei": "3180636000",
          "totalEstimateWei": "427865556000",
          "totalEstimateEth": "0.000000427865556",
          "reconciles": true
        },
        {
          "sample": "observed-window-max-large",
          "blockNumber": "500441487",
          "blockHash": "0x6fb0e1285fd0c3f2b78c666e527d21b438a5278658f973af14b1cedfc77784d4",
          "observedAt": "2026-08-31T23:02:27.000Z",
          "inputBytes": 2048,
          "headerBaseFeePerGasWei": "21248000",
          "nodeInterfaceBaseFeeWei": "20004000",
          "l1BaseFeeEstimateWei": "1227199",
          "gasEstimate": "56929",
          "gasEstimateForL1": "2391",
          "executionGas": "54538",
          "executionFeeWei": "1090978152000",
          "posterFeeWei": "47829564000",
          "totalEstimateWei": "1138807716000",
          "totalEstimateEth": "0.000001138807716",
          "reconciles": true
        }
      ]
    }
  },
  "interpretationLimits": [
    "The transactions have different call semantics, so calldata length alone does not explain execution gas.",
    "The fixed 1024-block windows show local observed minima and maxima, not universal low/high congestion.",
    "Base L1 fee upper bounds use unsigned serialized transaction sizes, not calldata bytes alone.",
    "NodeInterface estimates are pre-inclusion estimates and are not substituted for receipt values.",
    "No ETH or fiat price conversion is used; every amount is denominated in wei or ETH."
  ]
}