core/state: do not ignore null addr while iterative dump (#27320)

fixes bug which caused the zero-address to be ignored during an iterative state-dump.

---------

Co-authored-by: Martin Holst Swende <martin@swende.se>

cmd/evm/internal/t8ntool/transition.go

@@ -389,7 +389,10 @@ type Alloc map[common.Address]core.GenesisAccount
 
 func (g Alloc) OnRoot(common.Hash) {}
 
-func (g Alloc) OnAccount(addr common.Address, dumpAccount state.DumpAccount) {
+func (g Alloc) OnAccount(addr *common.Address, dumpAccount state.DumpAccount) {
+	if addr == nil {
+		return
+	}
 	balance, _ := new(big.Int).SetString(dumpAccount.Balance, 10)
 	var storage map[common.Hash]common.Hash
 	if dumpAccount.Storage != nil {
@@ -404,7 +407,7 @@ func (g Alloc) OnAccount(addr common.Address, dumpAccount state.DumpAccount) {
 		Balance: balance,
 		Nonce:   dumpAccount.Nonce,
 	}
-	g[addr] = genesisAccount
+	g[*addr] = genesisAccount
 }
 
 // saveFile marshals the object to the given file

core/state/dump.go

@@ -44,7 +44,7 @@ type DumpCollector interface {
 	// OnRoot is called with the state root
 	OnRoot(common.Hash)
 	// OnAccount is called once for each account in the trie
-	OnAccount(common.Address, DumpAccount)
+	OnAccount(*common.Address, DumpAccount)
 }
 
 // DumpAccount represents an account in the state.
@@ -72,8 +72,10 @@ func (d *Dump) OnRoot(root common.Hash) {
 }
 
 // OnAccount implements DumpCollector interface
-func (d *Dump) OnAccount(addr common.Address, account DumpAccount) {
+func (d *Dump) OnAccount(addr *common.Address, account DumpAccount) {
-	d.Accounts[addr] = account
+	if addr != nil {
+		d.Accounts[*addr] = account
+	}
 }
 
 // IteratorDump is an implementation for iterating over data.
@@ -89,8 +91,10 @@ func (d *IteratorDump) OnRoot(root common.Hash) {
 }
 
 // OnAccount implements DumpCollector interface
-func (d *IteratorDump) OnAccount(addr common.Address, account DumpAccount) {
+func (d *IteratorDump) OnAccount(addr *common.Address, account DumpAccount) {
-	d.Accounts[addr] = account
+	if addr != nil {
+		d.Accounts[*addr] = account
+	}
 }
 
 // iterativeDump is a DumpCollector-implementation which dumps output line-by-line iteratively.
@@ -99,7 +103,7 @@ type iterativeDump struct {
 }
 
 // OnAccount implements DumpCollector interface
-func (d iterativeDump) OnAccount(addr common.Address, account DumpAccount) {
+func (d iterativeDump) OnAccount(addr *common.Address, account DumpAccount) {
 	dumpAccount := &DumpAccount{
 		Balance:   account.Balance,
 		Nonce:     account.Nonce,
@@ -108,10 +112,7 @@ func (d iterativeDump) OnAccount(addr common.Address, account DumpAccount) {
 		Code:      account.Code,
 		Storage:   account.Storage,
 		SecureKey: account.SecureKey,
-		Address:   nil,
+		Address:   addr,
-	}
-	if addr != (common.Address{}) {
-		dumpAccount.Address = &addr
 	}
 	d.Encode(dumpAccount)
 }
@@ -152,16 +153,20 @@ func (s *StateDB) DumpToCollector(c DumpCollector, conf *DumpConfig) (nextKey []
 			CodeHash:  data.CodeHash,
 			SecureKey: it.Key,
 		}
-		addrBytes := s.trie.GetKey(it.Key)
+		var (
+			addrBytes = s.trie.GetKey(it.Key)
+			addr      = common.BytesToAddress(addrBytes)
+			address   *common.Address
+		)
 		if addrBytes == nil {
 			// Preimage missing
 			missingPreimages++
 			if conf.OnlyWithAddresses {
 				continue
 			}
-			account.SecureKey = it.Key
+		} else {
+			address = &addr
 		}
-		addr := common.BytesToAddress(addrBytes)
 		obj := newObject(s, addr, data)
 		if !conf.SkipCode {
 			account.Code = obj.Code(s.db)
@@ -183,7 +188,7 @@ func (s *StateDB) DumpToCollector(c DumpCollector, conf *DumpConfig) (nextKey []
 				account.Storage[common.BytesToHash(s.trie.GetKey(storageIt.Key))] = common.Bytes2Hex(content)
 			}
 		}
-		c.OnAccount(addr, account)
+		c.OnAccount(address, account)
 		accounts++
 		if time.Since(logged) > 8*time.Second {
 			log.Info("Trie dumping in progress", "at", it.Key, "accounts", accounts,

core/state/state_test.go

@@ -18,6 +18,7 @@ package state
 
 import (
 	"bytes"
+	"encoding/json"
 	"math/big"
 	"testing"
 
@@ -92,6 +93,41 @@ func TestDump(t *testing.T) {
 	}
 }
 
+func TestIterativeDump(t *testing.T) {
+	db := rawdb.NewMemoryDatabase()
+	sdb, _ := New(types.EmptyRootHash, NewDatabaseWithConfig(db, &trie.Config{Preimages: true}), nil)
+	s := &stateTest{db: db, state: sdb}
+
+	// generate a few entries
+	obj1 := s.state.GetOrNewStateObject(common.BytesToAddress([]byte{0x01}))
+	obj1.AddBalance(big.NewInt(22))
+	obj2 := s.state.GetOrNewStateObject(common.BytesToAddress([]byte{0x01, 0x02}))
+	obj2.SetCode(crypto.Keccak256Hash([]byte{3, 3, 3, 3, 3, 3, 3}), []byte{3, 3, 3, 3, 3, 3, 3})
+	obj3 := s.state.GetOrNewStateObject(common.BytesToAddress([]byte{0x02}))
+	obj3.SetBalance(big.NewInt(44))
+	obj4 := s.state.GetOrNewStateObject(common.BytesToAddress([]byte{0x00}))
+	obj4.AddBalance(big.NewInt(1337))
+
+	// write some of them to the trie
+	s.state.updateStateObject(obj1)
+	s.state.updateStateObject(obj2)
+	s.state.Commit(false)
+
+	b := &bytes.Buffer{}
+	s.state.IterativeDump(nil, json.NewEncoder(b))
+	// check that DumpToCollector contains the state objects that are in trie
+	got := b.String()
+	want := `{"root":"0xd5710ea8166b7b04bc2bfb129d7db12931cee82f75ca8e2d075b4884322bf3de"}
+{"balance":"22","nonce":0,"root":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","codeHash":"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470","address":"0x0000000000000000000000000000000000000001","key":"0x1468288056310c82aa4c01a7e12a10f8111a0560e72b700555479031b86c357d"}
+{"balance":"1337","nonce":0,"root":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","codeHash":"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470","address":"0x0000000000000000000000000000000000000000","key":"0x5380c7b7ae81a58eb98d9c78de4a1fd7fd9535fc953ed2be602daaa41767312a"}
+{"balance":"0","nonce":0,"root":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","codeHash":"0x87874902497a5bb968da31a2998d8f22e949d1ef6214bcdedd8bae24cca4b9e3","code":"0x03030303030303","address":"0x0000000000000000000000000000000000000102","key":"0xa17eacbc25cda025e81db9c5c62868822c73ce097cee2a63e33a2e41268358a1"}
+{"balance":"44","nonce":0,"root":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","codeHash":"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470","address":"0x0000000000000000000000000000000000000002","key":"0xd52688a8f926c816ca1e079067caba944f158e764817b83fc43594370ca9cf62"}
+`
+	if got != want {
+		t.Errorf("DumpToCollector mismatch:\ngot: %s\nwant: %s\n", got, want)
+	}
+}
+
 func TestNull(t *testing.T) {
 	s := newStateTest()
 	address := common.HexToAddress("0x823140710bf13990e4500136726d8b55")