feat: add proof_getProofWithMeta JSON-RPC method

src/Nethermind/Nethermind.Facade/BlockchainBridge.cs

@@ -457,7 +457,8 @@ public Hash256[] GetPendingTransactionFilterChanges(int filterId) =>
 
         public Address? RecoverTxSender(Transaction tx) => ecdsa.RecoverAddress(tx);
 
-        public void RunTreeVisitor<TCtx>(ITreeVisitor<TCtx> treeVisitor, BlockHeader? baseBlock) where TCtx : struct, INodeContext<TCtx> => stateReader.RunTreeVisitor(treeVisitor, baseBlock);
+        public void RunTreeVisitor<TCtx>(ITreeVisitor<TCtx> treeVisitor, BlockHeader? baseBlock, ProofDiagnostics? diagnostics = null) where TCtx : struct, INodeContext<TCtx>
+            => stateReader.RunTreeVisitor(treeVisitor, baseBlock, diagnostics: diagnostics);
 
         public bool HasStateForBlock(BlockHeader? baseBlock) => stateReader.HasStateForBlock(baseBlock);
 

src/Nethermind/Nethermind.Facade/IBlockchainBridge.cs

@@ -51,7 +51,9 @@ public interface IBlockchainBridge : ILogFinder
         IEnumerable<FilterLog> GetLogs(BlockParameter fromBlock, BlockParameter toBlock, HashSet<AddressAsKey>? addresses = null, IEnumerable<Hash256[]?>? topics = null, CancellationToken cancellationToken = default);
 
         bool TryGetLogs(int filterId, out IEnumerable<FilterLog> filterLogs, CancellationToken cancellationToken = default);
-        void RunTreeVisitor<TCtx>(ITreeVisitor<TCtx> treeVisitor, BlockHeader? baseBlock) where TCtx : struct, INodeContext<TCtx>;
+        /// <inheritdoc cref="Nethermind.State.IStateReader.RunTreeVisitor{TCtx}"/>
+        void RunTreeVisitor<TCtx>(ITreeVisitor<TCtx> treeVisitor, BlockHeader? baseBlock, ProofDiagnostics? diagnostics = null) where TCtx : struct, INodeContext<TCtx>;
+
         bool HasStateForBlock(BlockHeader? baseBlock);
 
         Witness GenerateExecutionWitness(BlockHeader parent, Block block);

src/Nethermind/Nethermind.JsonRpc.Test/Modules/Proof/ProofRpcModuleMetaTests.cs

@@ -0,0 +1,145 @@
+// SPDX-FileCopyrightText: 2026 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Autofac;
+using FluentAssertions;
+using Nethermind.Blockchain;
+using Nethermind.Blockchain.Find;
+using Nethermind.Blockchain.Headers;
+using Nethermind.Blockchain.Receipts;
+using Nethermind.Config;
+using Nethermind.Consensus.Processing;
+using Nethermind.Core;
+using Nethermind.Core.Crypto;
+using Nethermind.Core.Specs;
+using Nethermind.Core.Test;
+using Nethermind.Core.Test.Builders;
+using Nethermind.Core.Test.Db;
+using Nethermind.Core.Test.Modules;
+using Nethermind.Crypto;
+using Nethermind.Db;
+using Nethermind.Evm.State;
+using Nethermind.Int256;
+using Nethermind.JsonRpc.Modules;
+using Nethermind.JsonRpc.Modules.Proof;
+using Nethermind.Logging;
+using Nethermind.Specs;
+using Nethermind.Specs.Forks;
+using Nethermind.State;
+using NUnit.Framework;
+
+namespace Nethermind.JsonRpc.Test.Modules.Proof;
+
+[Parallelizable(ParallelScope.None)]
+public class ProofRpcModuleMetaTests
+{
+    private IProofRpcModule _proofRpcModule = null!;
+    private IBlockTree _blockTree = null!;
+    private IDbProvider _dbProvider = null!;
+    private TestSpecProvider _specProvider = null!;
+    private WorldStateManager _worldStateManager = null!;
+    private IContainer _container = null!;
+
+    [SetUp]
+    public async Task Setup()
+    {
+        _dbProvider = await TestMemDbProvider.InitAsync();
+        _worldStateManager = TestWorldStateFactory.CreateWorldStateManagerForTest(_dbProvider, LimboLogs.Instance);
+
+        Hash256 stateRoot;
+        IWorldState worldState = new WorldState(_worldStateManager.GlobalWorldState, LimboLogs.Instance);
+        using (System.IDisposable _ = worldState.BeginScope(IWorldState.PreGenesis))
+        {
+            worldState.CreateAccount(TestItem.AddressA, 100_000);
+            worldState.CreateAccount(TestItem.AddressB, 200_000);
+            worldState.CreateAccount(TestItem.AddressC, 300_000);
+            worldState.Commit(London.Instance);
+            worldState.CommitTree(0);
+            stateRoot = worldState.StateRoot;
+        }
+
+        InMemoryReceiptStorage receiptStorage = new();
+        _specProvider = new TestSpecProvider(London.Instance);
+        BlockTreeBuilder blockTreeBuilder = Build.A.BlockTree(new Block(Build.A.BlockHeader.WithStateRoot(stateRoot).TestObject, new BlockBody()), _specProvider)
+            .WithTransactions(receiptStorage)
+            .OfChainLength(5);
+        _blockTree = blockTreeBuilder.TestObject;
+
+        _container = new ContainerBuilder()
+            .AddModule(new TestNethermindModule(new ConfigProvider()))
+            .AddSingleton<ISpecProvider>(_specProvider)
+            .AddSingleton<IBlockPreprocessorStep>(new CompositeBlockPreprocessorStep(new RecoverSignatures(new EthereumEcdsa(TestBlockchainIds.ChainId), _specProvider, LimboLogs.Instance)))
+            .AddSingleton<IBlockTree>(_blockTree)
+            .AddSingleton<IDbProvider>(_dbProvider)
+            .AddSingleton<IHeaderFinder>(blockTreeBuilder.HeaderStore)
+            .AddSingleton<IReceiptStorage>(receiptStorage)
+            .AddSingleton<IWorldStateManager>(_worldStateManager)
+            .Build();
+        _proofRpcModule = _container.Resolve<IRpcModuleFactory<IProofRpcModule>>().Create();
+    }
+
+    [TearDown]
+    public void TearDown() => _container.Dispose();
+
+    [Test]
+    public void Returns_proof_payload_alongside_meta()
+    {
+        ResultWrapper<AccountProofWithMeta> result = _proofRpcModule.proof_getProofWithMeta(
+            TestItem.AddressA, new HashSet<UInt256>(), BlockParameter.Earliest);
+
+        result.Result.ResultType.Should().Be(ResultType.Success);
+        AccountProofWithMeta payload = result.Data;
+
+        payload.Should().NotBeNull();
+        payload.Proof.Should().NotBeNull();
+        payload.Proof.Address.Should().Be(TestItem.AddressA);
+        payload.Proof.Balance.Should().Be(100_000);
+        payload.Proof.Proof.Should().NotBeNull();
+        payload.Proof.Proof.Length.Should().BeGreaterThan(0);
+    }
+
+    [Test]
+    public void Meta_counters_have_sane_values()
+    {
+        AccountProofWithMeta payload = _proofRpcModule.proof_getProofWithMeta(
+            TestItem.AddressA, new HashSet<UInt256>(), BlockParameter.Earliest).Data;
+
+        payload.Meta.Should().NotBeNull();
+        payload.Meta.NodeLookups.Should().BeGreaterThan(0,
+            "every proof generation must perform at least one node lookup");
+        payload.Meta.CacheHits.Should().BeGreaterThanOrEqualTo(0);
+        payload.Meta.CacheHits.Should().BeLessThanOrEqualTo(payload.Meta.NodeLookups,
+            "cache hits cannot exceed total lookups");
+        payload.Meta.MaxDepth.Should().BeGreaterThanOrEqualTo(0);
+    }
+
+    [Test]
+    public void Repeated_calls_increase_cache_hits_on_warm_path()
+    {
+        AccountProofWithMeta first = _proofRpcModule.proof_getProofWithMeta(
+            TestItem.AddressA, new HashSet<UInt256>(), BlockParameter.Earliest).Data;
+        AccountProofWithMeta second = _proofRpcModule.proof_getProofWithMeta(
+            TestItem.AddressA, new HashSet<UInt256>(), BlockParameter.Earliest).Data;
+
+        second.Meta.CacheHits.Should().BeGreaterThanOrEqualTo(first.Meta.CacheHits,
+            "warming the cache should not reduce hit count on identical query");
+    }
+
+    [Test]
+    public void Rejects_too_many_storage_keys()
+    {
+        HashSet<UInt256> storageKeys = new();
+        for (int i = 0; i < 1001; i++)
+        {
+            storageKeys.Add((UInt256)i);
+        }
+
+        ResultWrapper<AccountProofWithMeta> result = _proofRpcModule.proof_getProofWithMeta(
+            TestItem.AddressA, storageKeys, BlockParameter.Earliest);
+
+        result.Result.ResultType.Should().Be(ResultType.Failure);
+        result.ErrorCode.Should().Be(ErrorCodes.InvalidParams);
+    }
+}

src/Nethermind/Nethermind.JsonRpc/Modules/Proof/AccountProofWithMeta.cs

@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: 2026 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+using Nethermind.State.Proofs;
+
+namespace Nethermind.JsonRpc.Modules.Proof
+{
+    /// <summary>
+    /// Response payload of <c>proof_getProofWithMeta</c> — the EIP-1186 account proof plus
+    /// per-call diagnostics from <see cref="ProofMeta"/>.
+    /// </summary>
+    public class AccountProofWithMeta
+    {
+        /// <summary>EIP-1186 account proof, identical in shape to <c>eth_getProof</c>'s result.</summary>
+        public AccountProof Proof { get; set; } = null!;
+
+        /// <summary>Per-call diagnostics captured during proof construction.</summary>
+        public ProofMeta Meta { get; set; } = null!;
+    }
+}

src/Nethermind/Nethermind.JsonRpc/Modules/Proof/IProofRpcModule.cs

@@ -1,9 +1,12 @@
 // SPDX-FileCopyrightText: 2022 Demerzel Solutions Limited
 // SPDX-License-Identifier: LGPL-3.0-only
 
+using System.Collections.Generic;
 using Nethermind.Blockchain.Find;
+using Nethermind.Core;
 using Nethermind.Core.Crypto;
 using Nethermind.Facade.Eth.RpcTransaction;
+using Nethermind.Int256;
 
 namespace Nethermind.JsonRpc.Modules.Proof
 {
@@ -28,5 +31,14 @@ public interface IProofRpcModule : IRpcModule
             ExampleResponse = "{\"receipt\":{\"transactionHash\":\"0xfff473e0d10e9dcc18bb4585fb2ba17f682949996f5dfda41c20c425a53b4e71\",\"transactionIndex\":\"0x0\",\"blockHash\":\"0x539822db4041dac07f02819b1337f5f9d7291a996f80d9c05ada334c7a97264c\",\"blockNumber\":\"0x1\",\"cumulativeGasUsed\":\"0x0\",\"gasUsed\":\"0x0\",\"to\":null,\"contractAddress\":null,\"logs\":[],\"logsBloom\":\"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\",\"status\":\"0x0\",\"type\":\"0x0\"},\"txProof\":[\"0xf851a073ff16e6f3a3ca20ba99ad5bacc973e800ba7ec7092266fcd2520703613e3d9580808080808080a0a70de17dcf5a91c1b986463b4e8419665333b2a66e66f7127baae3d4d58d052d8080808080808080\",\"0xf86530b862f86080018252089400000000000000000000000000000000000000000181801ca0b4e030f395ed357d206b58d9a0ded408589a9e26f1a5b41010772cd0d84b8d16a04d9797a972bc308ea635f22455881c41c7c9fb946c93db6f99d2bd529675af13\"],\"receiptProof\":[\"0xf851a08e4cd3def722e9727e505d3798454165d832e1aabd5c56e5d0e4e9f0796a783280808080808080a05380738598f169c9e407a0f61558e53ea59a4c5e643aabc57679c7c0a3b761428080808080808080\",\"0xf9012f30b9012bf90128a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421825208b9010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c0\"],\"blockHeader\":\"0xf901f9a0b3157bcccab04639f6393042690a6c9862deebe88c781f911e8dfd265531e9ffa01dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347940000000000000000000000000000000000000000a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0541c8844bd420f79a5f7f8db723e2106160d350043de7cf76d78ea13ed0ff6c9a0e1b1585a222beceb3887dc6701802facccf186c2d0f6aa69e26ae0c431fc2b5db9010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000830f424001833d090080830f424183010203a02ba5557a4c62a513c7e56d1bf13373e0da6bec016755483e91589fe1c6d212e28800000000000003e8\"}")]
 
         ResultWrapper<ReceiptWithProof> proof_getTransactionReceipt([JsonRpcParameter(ExampleValue = "[\"0xfff473e0d10e9dcc18bb4585fb2ba17f682949996f5dfda41c20c425a53b4e71\", \"true\"]")] Hash256 txHash, bool includeHeader);
+
+        [JsonRpcMethod(IsImplemented = true,
+            Description = "Returns the same payload as `eth_getProof` plus per-call diagnostics: `nodeLookups` (total trie-node fetches), `cacheHits` (of those, served from the in-process trie store cache), and `maxDepth` (deepest level reached in the account or any storage trie, in nibbles). Useful as a client-agnostic proxy for the work an EL does to serve a proof. The `proof` field has the same shape and content as `eth_getProof`'s result; duplicate `storageKeys` are deduplicated, matching the existing `eth_getProof` behaviour.",
+            IsSharable = false,
+            ExampleResponse = "{\"proof\":{\"address\":\"0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2\",\"balance\":\"0x18232098799834c9a9e2b\",\"codeHash\":\"0xd0a06b12ac47863b5c7be4185c2deaad1c61557033f56c7d4ea74429cbb25e23\",\"nonce\":\"0x1\",\"storageHash\":\"0x...\",\"accountProof\":[\"0x...\"],\"storageProof\":[]},\"meta\":{\"nodeLookups\":\"0x6e\",\"cacheHits\":\"0x6e\",\"maxDepth\":8}}")]
+        ResultWrapper<AccountProofWithMeta> proof_getProofWithMeta(
+            [JsonRpcParameter(ExampleValue = "\"0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2\"")] Address accountAddress,
+            [JsonRpcParameter(ExampleValue = "[]", Description = "Storage keys to include in the proof; duplicates are deduplicated.")] HashSet<UInt256> storageKeys,
+            [JsonRpcParameter(ExampleValue = "\"latest\"")] BlockParameter? blockParameter);
     }
 }

src/Nethermind/Nethermind.JsonRpc/Modules/Proof/ProofMeta.cs

@@ -0,0 +1,26 @@
+// SPDX-FileCopyrightText: 2026 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+namespace Nethermind.JsonRpc.Modules.Proof
+{
+    /// <summary>
+    /// Per-call diagnostics returned by <c>proof_getProofWithMeta</c> alongside the EIP-1186 proof.
+    /// </summary>
+    public class ProofMeta
+    {
+        /// <summary>
+        /// Total trie-node fetches the proof construction triggered (account + any storage tries).
+        /// </summary>
+        public long NodeLookups { get; set; }
+
+        /// <summary>
+        /// Subset of <see cref="NodeLookups"/> served from the in-process trie store cache.
+        /// </summary>
+        public long CacheHits { get; set; }
+
+        /// <summary>
+        /// Deepest level the visitor reached in the account or any storage trie, in nibbles.
+        /// </summary>
+        public int MaxDepth { get; set; }
+    }
+}

src/Nethermind/Nethermind.JsonRpc/Modules/Proof/ProofRpcModule.cs

@@ -11,15 +11,18 @@
 using Nethermind.Core.Crypto;
 using Nethermind.Core.Specs;
 using Nethermind.Crypto;
+using Nethermind.Facade;
 using Nethermind.Facade.Eth;
 using Nethermind.Evm;
 using Nethermind.Blockchain.Tracing;
 using Nethermind.Blockchain.Tracing.Proofs;
 using Nethermind.Facade.Eth.RpcTransaction;
+using Nethermind.Int256;
 using Nethermind.JsonRpc.Data;
 using Nethermind.Serialization.Rlp;
 using Nethermind.State.OverridableEnv;
 using Nethermind.State.Proofs;
+using Nethermind.Trie;
 
 namespace Nethermind.JsonRpc.Modules.Proof
 {
@@ -31,9 +34,11 @@ public class ProofRpcModule(
         IBlockFinder blockFinder,
         IReceiptFinder receiptFinder,
         ISpecProvider specProvider,
-        IJsonRpcConfig jsonRpcConfig)
+        IJsonRpcConfig jsonRpcConfig,
+        IBlockchainBridge blockchainBridge)
         : IProofRpcModule
     {
+        private const int GetProofWithMetaStorageKeyLimit = 1000;
         private readonly HeaderDecoder _headerDecoder = new();
         private static readonly IRlpStreamEncoder<TxReceipt> _receiptEncoder = Rlp.GetStreamEncoder<TxReceipt>();
 
@@ -175,6 +180,46 @@ public ResultWrapper<ReceiptWithProof> proof_getTransactionReceipt(Hash256 txHas
             return ResultWrapper<ReceiptWithProof>.Success(receiptWithProof);
         }
 
+        public ResultWrapper<AccountProofWithMeta> proof_getProofWithMeta(Address accountAddress, HashSet<UInt256> storageKeys, BlockParameter? blockParameter)
+        {
+            if (storageKeys.Count > GetProofWithMetaStorageKeyLimit)
+            {
+                return ResultWrapper<AccountProofWithMeta>.Fail(
+                    $"storageKeys: {storageKeys.Count} is over the query limit {GetProofWithMetaStorageKeyLimit}.",
+                    ErrorCodes.InvalidParams);
+            }
+
+            SearchResult<BlockHeader> searchResult = blockFinder.SearchForHeader(blockParameter);
+            if (searchResult.IsError)
+            {
+                return ResultWrapper<AccountProofWithMeta>.Fail(searchResult);
+            }
+
+            BlockHeader header = searchResult.Object;
+
+            if (!blockchainBridge.HasStateForBlock(header!))
+            {
+                return ResultWrapper<AccountProofWithMeta>.Fail(
+                    $"No state available for block {header!.ToString(BlockHeader.Format.Short)}",
+                    ErrorCodes.ResourceUnavailable);
+            }
+
+            AccountProofCollector accountProofCollector = new(accountAddress, storageKeys);
+            ProofDiagnostics diagnostics = new();
+            blockchainBridge.RunTreeVisitor(accountProofCollector, header!, diagnostics: diagnostics);
+
+            return ResultWrapper<AccountProofWithMeta>.Success(new AccountProofWithMeta
+            {
+                Proof = accountProofCollector.BuildResult(),
+                Meta = new ProofMeta
+                {
+                    NodeLookups = diagnostics.NodeLookups,
+                    CacheHits = diagnostics.CacheHits,
+                    MaxDepth = diagnostics.MaxDepth,
+                },
+            });
+        }
+
         private AccountProof[] CollectAccountProofs(ITracer tracer, BlockHeader? baseBlock, ProofTxTracer proofTxTracer)
         {
             List<AccountProof> accountProofs = new();

src/Nethermind/Nethermind.State.Flat/FlatStateReader.cs

@@ -52,7 +52,7 @@ public ReadOnlySpan<byte> GetStorage(BlockHeader? baseBlock, Address address, in
 
     public byte[]? GetCode(in ValueHash256 codeHash) => codeHash == Keccak.OfAnEmptyString.ValueHash256 ? [] : codeDb[codeHash.Bytes];
 
-    public void RunTreeVisitor<TCtx>(ITreeVisitor<TCtx> treeVisitor, BlockHeader? baseBlock, VisitingOptions? visitingOptions = null) where TCtx : struct, INodeContext<TCtx>
+    public void RunTreeVisitor<TCtx>(ITreeVisitor<TCtx> treeVisitor, BlockHeader? baseBlock, VisitingOptions? visitingOptions = null, ProofDiagnostics? diagnostics = null) where TCtx : struct, INodeContext<TCtx>
     {
         StateId stateId = new(baseBlock);
 
@@ -62,7 +62,7 @@ public void RunTreeVisitor<TCtx>(ITreeVisitor<TCtx> treeVisitor, BlockHeader? ba
         ReadOnlyStateTrieStoreAdapter trieStoreAdapter = new(reader);
 
         PatriciaTree patriciaTree = new(trieStoreAdapter, logManager);
-        patriciaTree.Accept(treeVisitor, stateId.StateRoot.ToCommitment(), visitingOptions);
+        patriciaTree.Accept(treeVisitor, stateId.StateRoot.ToCommitment(), visitingOptions, diagnostics: diagnostics);
     }
 
     public bool HasStateForBlock(BlockHeader? baseBlock) => flatDbManager.HasStateForBlock(new StateId(baseBlock));