add: keep only debug_batchGetStorage; add tests

internal/ethapi/api.go

@@ -1925,33 +1925,7 @@ type DebugAPI struct {
 
 // NewDebugAPI creates a new instance of DebugAPI.
 func NewDebugAPI(b Backend) *DebugAPI {
-	return &DebugAPI{b: b}
-}
-
-// BatchGetStorageAt returns multiple storage slots for a single account at the given block.
-// Params: address, [hexKey...], blockNrOrHash
-// Returns values in the same order as input keys.
-func (api *DebugAPI) BatchGetStorageAt(ctx context.Context, address common.Address, hexKeys []string, blockNrOrHash rpc.BlockNumberOrHash) ([]hexutil.Bytes, error) {
-	state, _, err := api.b.StateAndHeaderByNumberOrHash(ctx, blockNrOrHash)
-	if state == nil || err != nil {
-		return nil, err
-	}
-	// Preallocate results
-	res := make([]hexutil.Bytes, len(hexKeys))
-	for i, k := range hexKeys {
-		key, _, err := decodeHash(k)
-		if err != nil {
-			return nil, fmt.Errorf("unable to decode storage key at index %d: %w", i, err)
-		}
-		v := state.GetState(address, key)
-		vv := make([]byte, len(v))
-		copy(vv, v[:])
-		res[i] = vv
-	}
-	if err := state.Error(); err != nil {
-		return nil, err
-	}
-	return res, nil
+    return &DebugAPI{b: b}
 }
 
 // BatchGetStorage returns multiple storage slots for multiple accounts at the given block.

internal/ethapi/batch_storage_test.go

@@ -0,0 +1,105 @@
+package ethapi
+
+import (
+    "context"
+    "testing"
+
+    "github.com/ethereum/go-ethereum/accounts"
+    "github.com/ethereum/go-ethereum/common"
+    "github.com/ethereum/go-ethereum/common/hexutil"
+    "github.com/ethereum/go-ethereum/core"
+    "github.com/ethereum/go-ethereum/core/state"
+    "github.com/ethereum/go-ethereum/core/types"
+    "github.com/ethereum/go-ethereum/core/vm"
+    "github.com/ethereum/go-ethereum/ethdb"
+    "github.com/ethereum/go-ethereum/event"
+    "github.com/ethereum/go-ethereum/params"
+    "github.com/ethereum/go-ethereum/rpc"
+)
+
+// storageBackend composes backendMock and overrides StateAndHeaderByNumberOrHash
+// to return a prepared in-memory StateDB for testing.
+type storageBackend struct {
+    *backendMock
+    state *state.StateDB
+}
+
+func (b *storageBackend) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*state.StateDB, *types.Header, error) {
+    return b.state, nil, nil
+}
+
+// Ensure storageBackend still satisfies the Backend interface by forwarding
+// the remaining methods via the embedded backendMock (compile-time check).
+var _ Backend = (*storageBackend)(nil)
+
+func TestDebugBatchGetStorage(t *testing.T) {
+    t.Parallel()
+
+    // Prepare an in-memory state database and set some storage values.
+    sdb, _ := state.New(types.EmptyRootHash, state.NewDatabaseForTesting())
+
+    addr1 := common.HexToAddress("0x1000000000000000000000000000000000000001")
+    addr2 := common.HexToAddress("0x2000000000000000000000000000000000000002")
+
+    keyA := common.HexToHash("0x01")
+    keyB := common.HexToHash("0x02")
+    keyC := common.HexToHash("0x03")
+
+    valA := common.HexToHash("0xaaa")
+    valB := common.HexToHash("0xbbb")
+    valC := common.HexToHash("0xccc")
+
+    sdb.SetState(addr1, keyA, valA)
+    sdb.SetState(addr1, keyB, valB)
+    sdb.SetState(addr2, keyC, valC)
+
+    // Wire the API with a backend that returns our state.
+    base := newBackendMock()
+    b := &storageBackend{backendMock: base, state: sdb}
+    api := NewDebugAPI(b)
+
+    // Build request: addr1 asks [keyB, keyA] (order test), addr2 asks [keyC, missing]
+    req := map[common.Address][]string{
+        addr1: {"0x02", "0x01"},
+        addr2: {"0x03", "0x04"},
+    }
+
+    got, err := api.BatchGetStorage(context.Background(), req, rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber))
+    if err != nil {
+        t.Fatalf("BatchGetStorage returned error: %v", err)
+    }
+
+    // Validate addr1 order and values
+    if len(got[addr1]) != 2 {
+        t.Fatalf("addr1 length mismatch: got %d want 2", len(got[addr1]))
+    }
+    if hexutil.Bytes(got[addr1][0]).String() != hexutil.Bytes(valB[:]).String() {
+        t.Fatalf("addr1[0] mismatch: got %s want %s", hexutil.Bytes(got[addr1][0]).String(), hexutil.Bytes(valB[:]).String())
+    }
+    if hexutil.Bytes(got[addr1][1]).String() != hexutil.Bytes(valA[:]).String() {
+        t.Fatalf("addr1[1] mismatch: got %s want %s", hexutil.Bytes(got[addr1][1]).String(), hexutil.Bytes(valA[:]).String())
+    }
+
+    // Validate addr2 values (existing and zero for missing)
+    if len(got[addr2]) != 2 {
+        t.Fatalf("addr2 length mismatch: got %d want 2", len(got[addr2]))
+    }
+    if hexutil.Bytes(got[addr2][0]).String() != hexutil.Bytes(valC[:]).String() {
+        t.Fatalf("addr2[0] mismatch: got %s want %s", hexutil.Bytes(got[addr2][0]).String(), hexutil.Bytes(valC[:]).String())
+    }
+    if hexutil.Bytes(got[addr2][1]).String() != hexutil.Bytes(common.Hash{}[:]).String() {
+        t.Fatalf("addr2[1] mismatch: got %s want %s (zero)", hexutil.Bytes(got[addr2][1]).String(), hexutil.Bytes(common.Hash{}[:]).String())
+    }
+}
+
+// Ensure backendMock compiles in this file by referencing needed imports
+// (no-ops; prevents unused import errors if interface evolves).
+var (
+    _ = accounts.Account{}
+    _ = core.ChainEvent{}
+    _ vm.Config
+    _ ethdb.Database
+    _ event.Subscription
+    _ params.ChainConfig
+)
+

internal/web3ext/web3ext.go

@@ -415,16 +415,11 @@ web3._extend({
 			call: 'debug_storageRangeAt',
 			params: 5,
 		}),
-		new web3._extend.Method({
-			name: 'batchGetStorageAt',
-			call: 'debug_batchGetStorageAt',
-			params: 3,
-		}),
-		new web3._extend.Method({
-			name: 'batchGetStorage',
-			call: 'debug_batchGetStorage',
-			params: 2,
-		}),
+        new web3._extend.Method({
+            name: 'batchGetStorage',
+            call: 'debug_batchGetStorage',
+            params: 2,
+        }),
 		new web3._extend.Method({
 			name: 'getModifiedAccountsByNumber',
 			call: 'debug_getModifiedAccountsByNumber',