cerc-io/go-ethereum
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common.BytesToHash(path) => crypto.Keaccak256(hash) in builder; BytesToHash produces same hash for e.g. []byte{} and []byte{\x00} - prefix \x00 steps are inconsequential to the hash result

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This commit is contained in:
Ian Norden 2020-05-08 11:58:22 -05:00
parent b5a9ea52e0
commit 5598d67872
2 changed files with 22 additions and 14 deletions
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5
statediff/builder.go
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@ -148,6 +148,7 @@ func (sdb *builder) collectDiffNodes(a, b trie.NodeIterator) (AccountsMap, error
if err != nil {
return nil, err
}
nodePathHash := crypto.Keccak256Hash(nodePath)
switch ty {
case Leaf:
var account state.Account
@ -166,11 +167,11 @@ func (sdb *builder) collectDiffNodes(a, b trie.NodeIterator) (AccountsMap, error
LeafKey: leafKey,
Account: &account,
}
diffAccounts[common.BytesToHash(encodedPath)] = aw
diffAccounts[nodePathHash] = aw
}
case Extension, Branch:
if sdb.config.IntermediateNodes {
diffAccounts[common.BytesToHash(nodePath)] = accountWrapper{
diffAccounts[nodePathHash] = accountWrapper{
NodeType: ty,
Path: nodePath,
NodeValue: node,

31
statediff/builder_test.go
View File

@ -349,6 +349,13 @@ func TestBuilder(t *testing.T) {
BlockNumber: block1.Number(),
BlockHash: block1.Hash(),
CreatedAccounts: []statediff.AccountDiff{
{
Path: []byte{'\x00'},
NodeType: statediff.Leaf,
LeafKey: testhelpers.BankLeafKey,
NodeValue: bankAccountAtBlock1LeafNode,
Storage: []statediff.StorageDiff{},
},
{
Path: []byte{'\x05'},
NodeType: statediff.Leaf,
@ -364,16 +371,16 @@ func TestBuilder(t *testing.T) {
Storage: []statediff.StorageDiff{},
},
},
DeletedAccounts: emptyAccountMap,
UpdatedAccounts: []statediff.AccountDiff{
{
Path: []byte{'\x00'},
DeletedAccounts: []statediff.AccountDiff{ // This leaf appears to be deleted since it is turned into a branch node
{ // It would instead show up in the UpdateAccounts as new branch node IF intermediate node diffing was turned on (as it is in the test below)
Path: []byte{},
NodeType: statediff.Leaf,
LeafKey: testhelpers.BankLeafKey,
NodeValue: bankAccountAtBlock1LeafNode,
NodeValue: bankAccountAtBlock0LeafNode,
Storage: []statediff.StorageDiff{},
},
},
UpdatedAccounts: emptyAccountMap,
},
},
{
@ -590,9 +597,10 @@ func TestBuilderWithIntermediateNodes(t *testing.T) {
BlockHash: block1.Hash(),
CreatedAccounts: []statediff.AccountDiff{
{
Path: []byte{},
NodeType: statediff.Branch,
NodeValue: block1BranchNode,
Path: []byte{'\x00'},
NodeType: statediff.Leaf,
LeafKey: testhelpers.BankLeafKey,
NodeValue: bankAccountAtBlock1LeafNode,
Storage: []statediff.StorageDiff{},
},
{
@ -613,10 +621,9 @@ func TestBuilderWithIntermediateNodes(t *testing.T) {
DeletedAccounts: emptyAccountMap,
UpdatedAccounts: []statediff.AccountDiff{
{
Path: []byte{'\x00'},
NodeType: statediff.Leaf,
LeafKey: testhelpers.BankLeafKey,
NodeValue: bankAccountAtBlock1LeafNode,
Path: []byte{},
NodeType: statediff.Branch,
NodeValue: block1BranchNode,
Storage: []statediff.StorageDiff{},
},
},