Update config, gas calculations, receipt fields according to OP's Fjord

src/Nethermind/Chains/op-sepolia.json

@@ -8,6 +8,7 @@
         "bedrockBlockNumber": "0x0",
         "canyonTimestamp": "0x6553a790",
         "ecotoneTimestamp": "0x65D62C10",
+        "fjordTimestamp": "0x66575100",
         "l1FeeRecipient": "0x420000000000000000000000000000000000001A",
         "l1BlockAddress": "0x4200000000000000000000000000000000000015",
         "canyonBaseFeeChangeDenominator": "250",
@@ -60,6 +61,7 @@
     "eip4844TransitionTimestamp": "0x65D62C10",
     "eip5656TransitionTimestamp": "0x65D62C10",
     "eip6780TransitionTimestamp": "0x65D62C10",
+    "eip7212TransitionTimestamp": "0x66575100",
     "terminalTotalDifficulty": "0"
   },
   "genesis": {

src/Nethermind/Nethermind.Optimism.Test/GasCostTests.cs

@@ -0,0 +1,37 @@
+// SPDX-FileCopyrightText: 2022 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+using System.Collections;
+using Nethermind.Int256;
+using NUnit.Framework;
+
+namespace Nethermind.Optimism.Test;
+
+public class GasCostTests
+{
+    [TestCaseSource(nameof(FjordL1CostCalculationTestCases))]
+    public UInt256 Fjord_l1cost_should_match(UInt256 fastLzSize, UInt256 l1BaseFee, UInt256 blobBaseFee, UInt256 l1BaseFeeScalar, UInt256 l1BlobBaseFeeScalar) =>
+        OPL1CostHelper.ComputeL1CostFjord(fastLzSize, l1BaseFee, blobBaseFee, l1BaseFeeScalar, l1BlobBaseFeeScalar);
+
+    public static IEnumerable FjordL1CostCalculationTestCases
+    {
+        get
+        {
+            static TestCaseData MakeTestCase(string testCase, ulong result, ulong fastLzSize, ulong l1BaseFee, ulong blobBaseFee, ulong l1BaseFeeScalar, ulong l1BlobBaseFeeScalar)
+            {
+                return new TestCaseData(new UInt256(fastLzSize), new UInt256(l1BaseFee), new UInt256(blobBaseFee), new UInt256(l1BaseFeeScalar), new UInt256(l1BlobBaseFeeScalar))
+                {
+                    ExpectedResult = new UInt256(result),
+                    TestName = testCase
+                };
+            }
+
+            yield return MakeTestCase("Low compressed size", 3203000, 50, 1000000000, 10000000, 2, 3);
+            yield return MakeTestCase("Below minimal #1", 3203000, 150, 1000000000, 10000000, 2, 3);
+            yield return MakeTestCase("Below minimal #2", 3203000, 170, 1000000000, 10000000, 2, 3);
+            yield return MakeTestCase("Above minimal #1", 3217602, 171, 1000000000, 10000000, 2, 3);
+            yield return MakeTestCase("Above minimal #2", 3994602, 200, 1000000000, 10000000, 2, 3);
+            yield return MakeTestCase("Regular block #1", 2883950646753, 1044, 28549556977, 1, 7600, 862000);
+        }
+    }
+}

src/Nethermind/Nethermind.Optimism.Test/ReceiptDecoderTests.cs

@@ -8,7 +8,7 @@
 
 namespace Nethermind.Optimism.Test;
 
-public partial class ReceiptDecoderTests
+public class ReceiptDecoderTests
 {
     [TestCaseSource(nameof(DepositTxReceiptsSerializationTestCases))]
     public void Test_tx_network_form_receipts_properly_encoded_for_trie(byte[] rlp, bool includesNonce, bool includesVersion, bool shouldIncludeNonceAndVersionForTxTrie)

src/Nethermind/Nethermind.Optimism/IOptimismSpecHelper.cs

@@ -13,6 +13,7 @@ public interface IOptimismSpecHelper
     bool IsRegolith(BlockHeader header);
     bool IsCanyon(BlockHeader header);
     bool IsEcotone(BlockHeader header);
+    bool IsFjord(BlockHeader header);
     Address? Create2DeployerAddress { get; }
     byte[]? Create2DeployerCode { get; }
 }

src/Nethermind/Nethermind.Optimism/L1BlockGasInfo.cs

@@ -26,14 +26,16 @@ public readonly struct L1BlockGasInfo
     private readonly UInt256 _overhead;
     private readonly UInt256 _feeScalar;
     private readonly string? _feeScalarDecimal;
+    private readonly bool _isFjord;
     private readonly bool _isEcotone;
     private readonly bool _isRegolith;
 
-    private static readonly byte[] EcotoneL1AttributesSelector = [0x44, 0x0a, 0x5e, 0x20];
+    private static readonly byte[] BedrockL1AttributesSelector = [0x01, 0x5d, 0x8e, 0xb9];
+    private readonly IOptimismSpecHelper _specHelper;
 
-    public L1BlockGasInfo(Block block, bool isRegolith)
+    public L1BlockGasInfo(Block block, IOptimismSpecHelper specHelper)
     {
-        _isRegolith = isRegolith;
+        _specHelper = specHelper;
 
         if (block is not null && block.Transactions.Length > 0)
         {
@@ -45,7 +47,9 @@ public L1BlockGasInfo(Block block, bool isRegolith)
 
             Memory<byte> data = depositTx.Data.Value;
 
-            if (_isEcotone = data[0..4].Span.SequenceEqual(EcotoneL1AttributesSelector))
+            _isFjord = _specHelper.IsFjord(block.Header);
+
+            if (_isFjord || (_isEcotone = (_specHelper.IsEcotone(block.Header) && !data[0..4].Span.SequenceEqual(BedrockL1AttributesSelector))))
             {
                 if (data.Length != 164)
                 {
@@ -59,6 +63,7 @@ public L1BlockGasInfo(Block block, bool isRegolith)
             }
             else
             {
+                _isRegolith = true;
                 if (data.Length < 4 + 32 * 8)
                 {
                     return;
@@ -80,7 +85,12 @@ public readonly L1TxGasInfo GetTxGasInfo(Transaction tx)
 
         if (_l1GasPrice is not null)
         {
-            if (_isEcotone)
+            if (_isFjord)
+            {
+                UInt256 fastLzSize = OPL1CostHelper.ComputeFlzCompressLen(tx);
+                l1Fee = OPL1CostHelper.ComputeL1CostFjord(fastLzSize, _l1GasPrice.Value, _l1BlobBaseFee, _l1BaseFeeScalar, _l1BlobBaseFeeScalar);
+            }
+            else if (_isEcotone)
             {
                 l1GasUsed = OPL1CostHelper.ComputeDataGas(tx, _isRegolith);
                 l1Fee = OPL1CostHelper.ComputeL1CostEcotone(l1GasUsed.Value, _l1GasPrice.Value, _l1BlobBaseFee, _l1BaseFeeScalar, _l1BlobBaseFeeScalar);

src/Nethermind/Nethermind.Optimism/OPConfigHelper.cs

@@ -12,6 +12,7 @@ public class OptimismSpecHelper(OptimismParameters parameters) : IOptimismSpecHe
     private readonly ulong _regolithTimestamp = parameters.RegolithTimestamp;
     private readonly ulong? _canyonTimestamp = parameters.CanyonTimestamp;
     private readonly ulong? _ecotoneTimestamp = parameters.EcotoneTimestamp;
+    private readonly ulong? _fjordTimestamp = parameters.FjordTimestamp;
 
     public Address L1FeeReceiver { get; init; } = parameters.L1FeeRecipient;
 
@@ -35,6 +36,11 @@ public bool IsEcotone(BlockHeader header)
         return header.Timestamp >= _ecotoneTimestamp;
     }
 
+    public bool IsFjord(BlockHeader header)
+    {
+        return header.Timestamp >= _fjordTimestamp;
+    }
+
     public Address? Create2DeployerAddress { get; } = parameters.Create2DeployerAddress;
     public byte[]? Create2DeployerCode { get; } = parameters.Create2DeployerCode;
 }

src/Nethermind/Nethermind.Optimism/OPL1CostHelper.cs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 
 using System;
+using System.Buffers;
 using System.Linq;
 using System.Runtime.CompilerServices;
 using Nethermind.Core;
@@ -20,27 +21,55 @@ public class OPL1CostHelper(IOptimismSpecHelper opSpecHelper, Address l1BlockAdd
     private readonly StorageCell _overheadSlot = new(l1BlockAddr, new UInt256(5));
     private readonly StorageCell _scalarSlot = new(l1BlockAddr, new UInt256(6));
 
-    private static readonly UInt256 basicDevider = 1_000_000;
+    private static readonly UInt256 BasicDivisor = 1_000_000;
 
     // Ecotone
     private readonly StorageCell _blobBaseFeeSlot = new(l1BlockAddr, new UInt256(7));
     private readonly StorageCell _baseFeeScalarSlot = new(l1BlockAddr, new UInt256(3));
 
-    private static readonly UInt256 precisionMultiplier = 16;
-    private static readonly UInt256 precisionDevider = precisionMultiplier * basicDevider;
+    private static readonly UInt256 PrecisionMultiplier = 16;
+    private static readonly UInt256 PrecisionDivisor = PrecisionMultiplier * BasicDivisor;
+
+
+    // Fjord
+    private static readonly UInt256 L1CostInterceptNeg = 42_585_600;
+    private static readonly UInt256 L1CostFastlzCoef = 836_500;
+
+    private static readonly UInt256 MinTransactionSizeScaled = 100 * 1_000_000;
+    private static readonly UInt256 FjordDivisor = 1_000_000_000_000;
 
     [SkipLocalsInit]
     public UInt256 ComputeL1Cost(Transaction tx, BlockHeader header, IWorldState worldState)
     {
         if (tx.IsDeposit())
             return UInt256.Zero;
 
+        UInt256 l1BaseFee = new(worldState.Get(_l1BaseFeeSlot), true);
+
+        if (_opSpecHelper.IsFjord(header))
+        {
+            UInt256 blobBaseFee = new(worldState.Get(_blobBaseFeeSlot), true);
+
+            ReadOnlySpan<byte> scalarData = worldState.Get(_baseFeeScalarSlot);
+
+            const int baseFeeFieldsStart = 16;
+            const int fieldSize = sizeof(uint);
+
+            int l1BaseFeeScalarStart = scalarData.Length > baseFeeFieldsStart ? scalarData.Length - baseFeeFieldsStart : 0;
+            int l1BaseFeeScalarEnd = l1BaseFeeScalarStart + (scalarData.Length >= baseFeeFieldsStart ? fieldSize : fieldSize - baseFeeFieldsStart + scalarData.Length);
+            UInt256 l1BaseFeeScalar = new(scalarData[l1BaseFeeScalarStart..l1BaseFeeScalarEnd], true);
+            UInt256 l1BlobBaseFeeScalar = new(scalarData[l1BaseFeeScalarEnd..(l1BaseFeeScalarEnd + fieldSize)], true);
+
+            uint fastLzSize = ComputeFlzCompressLen(tx);
+
+            return ComputeL1CostFjord(fastLzSize, l1BaseFee, blobBaseFee, l1BaseFeeScalar, l1BlobBaseFeeScalar);
+        }
+
         UInt256 dataGas = ComputeDataGas(tx, _opSpecHelper.IsRegolith(header));
+
         if (dataGas.IsZero)
             return UInt256.Zero;
 
-        UInt256 l1BaseFee = new(worldState.Get(_l1BaseFeeSlot), true);
-
         if (_opSpecHelper.IsEcotone(header))
         {
             UInt256 blobBaseFee = new(worldState.Get(_blobBaseFeeSlot), true);
@@ -79,15 +108,146 @@ public static UInt256 ComputeDataGas(Transaction tx, bool isRegolith)
         return (ulong)(zeroCount * GasCostOf.TxDataZero + nonZeroCount * GasCostOf.TxDataNonZeroEip2028);
     }
 
+    // Fjord L1 formula:
+    // l1FeeScaled = baseFeeScalar * l1BaseFee * 16 + blobFeeScalar * l1BlobBaseFee
+    // estimatedSize = max(minTransactionSize, intercept + fastlzCoef * fastlzSize)
+    // l1Cost = estimatedSize * l1FeeScaled / 1e12
+    public static UInt256 ComputeL1CostFjord(UInt256 fastLzSize, UInt256 l1BaseFee, UInt256 blobBaseFee, UInt256 l1BaseFeeScalar, UInt256 l1BlobBaseFeeScalar)
+    {
+        UInt256 l1FeeScaled = l1BaseFeeScalar * l1BaseFee * PrecisionMultiplier + l1BlobBaseFeeScalar * blobBaseFee;
+        UInt256 fastLzCost = L1CostFastlzCoef * fastLzSize;
+
+        if (fastLzCost < L1CostInterceptNeg)
+        {
+            fastLzCost = 0;
+        }
+        else
+        {
+            fastLzCost -= L1CostInterceptNeg;
+        }
+
+        var estimatedSize = UInt256.Max(MinTransactionSizeScaled, fastLzCost);
+        return estimatedSize * l1FeeScaled / FjordDivisor;
+    }
+
     // Ecotone formula: (dataGas) * (16 * l1BaseFee * l1BaseFeeScalar + l1BlobBaseFee*l1BlobBaseFeeScalar) / 16e6
     public static UInt256 ComputeL1CostEcotone(UInt256 dataGas, UInt256 l1BaseFee, UInt256 blobBaseFee, UInt256 l1BaseFeeScalar, UInt256 l1BlobBaseFeeScalar)
     {
-        return dataGas * (precisionMultiplier * l1BaseFee * l1BaseFeeScalar + blobBaseFee * l1BlobBaseFeeScalar) / precisionDevider;
+        return dataGas * (PrecisionMultiplier * l1BaseFee * l1BaseFeeScalar + blobBaseFee * l1BlobBaseFeeScalar) / PrecisionDivisor;
     }
 
     // Pre-Ecotone formula: (dataGas + overhead) * l1BaseFee * scalar / 1e6
     public static UInt256 ComputeL1CostPreEcotone(UInt256 dataGasWithOverhead, UInt256 l1BaseFee, UInt256 feeScalar)
     {
-        return dataGasWithOverhead * l1BaseFee * feeScalar / basicDevider;
+        return dataGasWithOverhead * l1BaseFee * feeScalar / BasicDivisor;
+    }
+
+    // Based on:
+    // https://github.com/ethereum-optimism/op-geth/blob/7c2819836018bfe0ca07c4e4955754834ffad4e0/core/types/rollup_cost.go
+    // https://github.com/Vectorized/solady/blob/5315d937d79b335c668896d7533ac603adac5315/js/solady.js
+    [SkipLocalsInit]
+    public static uint ComputeFlzCompressLen(Transaction tx)
+    {
+        byte[] encoded = Rlp.Encode(tx, RlpBehaviors.SkipTypedWrapping).Bytes;
+
+        [SkipLocalsInit]
+        static uint FlzCompressLen(byte[] data)
+        {
+            uint n = 0;
+            uint[] ht = ArrayPool<uint>.Shared.Rent(8192);
+            try
+            {
+                uint u24(uint i) => data[i] | ((uint)data[i + 1] << 8) | ((uint)data[i + 2] << 16);
+                uint cmp(uint p, uint q, uint e)
+                {
+                    uint l = 0;
+                    for (e -= q; l < e; l++)
+                    {
+                        if (data[p + (int)l] != data[q + (int)l])
+                        {
+                            e = 0;
+                        }
+                    }
+                    return l;
+                }
+                void literals(uint r)
+                {
+                    n += 0x21 * (r / 0x20);
+                    r %= 0x20;
+                    if (r != 0)
+                    {
+                        n += r + 1;
+                    }
+                }
+                void match(uint l)
+                {
+                    l--;
+                    n += 3 * (l / 262);
+                    if (l % 262 >= 6)
+                    {
+                        n += 3;
+                    }
+                    else
+                    {
+                        n += 2;
+                    }
+                }
+                uint hash(uint v) => ((2654435769 * v) >> 19) & 0x1fff;
+                uint setNextHash(uint ip)
+                {
+                    ht[hash(u24(ip))] = ip;
+                    return ip + 1;
+                }
+                uint a = 0;
+                uint ipLimit = (uint)data.Length - 13;
+                if (data.Length < 13)
+                {
+                    ipLimit = 0;
+                }
+                for (uint ip = a + 2; ip < ipLimit;)
+                {
+                    uint d;
+                    uint r;
+                    for (; ; )
+                    {
+                        uint s = u24(ip);
+                        uint h = hash(s);
+                        r = ht[h];
+                        ht[h] = ip;
+                        d = ip - r;
+                        if (ip >= ipLimit)
+                        {
+                            break;
+                        }
+                        ip++;
+                        if (d <= 0x1fff && s == u24(r))
+                        {
+                            break;
+                        }
+                    }
+                    if (ip >= ipLimit)
+                    {
+                        break;
+                    }
+                    ip--;
+                    if (ip > a)
+                    {
+                        literals(ip - a);
+                    }
+                    uint l = cmp(r + 3, ip + 3, ipLimit + 9);
+                    match(l);
+                    ip = setNextHash(setNextHash(ip + l));
+                    a = ip;
+                }
+                literals((uint)data.Length - a);
+                return n;
+            }
+            finally
+            {
+                ArrayPool<uint>.Shared.Return(ht);
+            }
+        }
+
+        return FlzCompressLen(encoded);
     }
 }

src/Nethermind/Nethermind.Optimism/Rpc/OptimismEthRpcModule.cs

@@ -90,7 +90,7 @@ public OptimismEthRpcModule(
             OptimismTxReceipt[] receipts = receiptFinder.Get(block).Cast<OptimismTxReceipt>().ToArray() ?? new OptimismTxReceipt[block.Transactions.Length];
             bool isEip1559Enabled = specProvider.GetSpec(block.Header).IsEip1559Enabled;
 
-            L1BlockGasInfo l1BlockGasInfo = new(block, opSpecHelper.IsRegolith(block!.Header));
+            L1BlockGasInfo l1BlockGasInfo = new(block, opSpecHelper);
 
             OptimismReceiptForRpc[]? result = [.. receipts
                 .Zip(block.Transactions, (r, t) =>
@@ -153,7 +153,7 @@ public override async Task<ResultWrapper<Hash256>> eth_sendRawTransaction(byte[]
 
         Block block = foundBlock.Object;
 
-        L1BlockGasInfo l1GasInfo = new(block, _opSpecHelper.IsRegolith(block.Header));
+        L1BlockGasInfo l1GasInfo = new(block, _opSpecHelper);
         return ResultWrapper<OptimismReceiptForRpc?>.Success(
             new(txHash, (OptimismTxReceipt)receipt, gasInfo.Value, l1GasInfo.GetTxGasInfo(block.Transactions.First(tx => tx.Hash == txHash)), logIndexStart));
     }

src/Nethermind/Nethermind.Specs/ChainSpecStyle/ChainSpecLoader.cs

@@ -337,6 +337,8 @@ static AuRaParameters.Validator LoadValidator(ChainSpecJson.AuRaValidatorJson va
                 BedrockBlockNumber = chainSpecJson.Engine.Optimism.BedrockBlockNumber,
                 CanyonTimestamp = chainSpecJson.Engine.Optimism.CanyonTimestamp,
                 EcotoneTimestamp = chainSpecJson.Engine.Optimism.EcotoneTimestamp,
+                FjordTimestamp = chainSpecJson.Engine.Optimism.FjordTimestamp,
+
                 L1FeeRecipient = chainSpecJson.Engine.Optimism.L1FeeRecipient,
                 L1BlockAddress = chainSpecJson.Engine.Optimism.L1BlockAddress,
                 CanyonBaseFeeChangeDenominator = chainSpecJson.Engine.Optimism.CanyonBaseFeeChangeDenominator,