diff options
Diffstat (limited to 'trie')
-rw-r--r-- | trie/database.go | 5 | ||||
-rw-r--r-- | trie/database_test.go | 33 |
2 files changed, 38 insertions, 0 deletions
diff --git a/trie/database.go b/trie/database.go index 739a98add..c39af85cf 100644 --- a/trie/database.go +++ b/trie/database.go @@ -17,6 +17,7 @@ package trie import ( + "errors" "fmt" "io" "sync" @@ -391,6 +392,10 @@ func (db *Database) node(hash common.Hash, cachegen uint16) node { // Node retrieves an encoded cached trie node from memory. If it cannot be found // cached, the method queries the persistent database for the content. func (db *Database) Node(hash common.Hash) ([]byte, error) { + // It doens't make sense to retrieve the metaroot + if hash == (common.Hash{}) { + return nil, errors.New("not found") + } // Retrieve the node from the clean cache if available if db.cleans != nil { if enc, err := db.cleans.Get(string(hash[:])); err == nil && enc != nil { diff --git a/trie/database_test.go b/trie/database_test.go new file mode 100644 index 000000000..65b65678b --- /dev/null +++ b/trie/database_test.go @@ -0,0 +1,33 @@ +// Copyright 2019 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package trie + +import ( + "testing" + + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/ethdb" +) + +// Tests that the trie database returns a missing trie node error if attempting +// to retrieve the meta root. +func TestDatabaseMetarootFetch(t *testing.T) { + db := NewDatabase(ethdb.NewMemDatabase()) + if _, err := db.Node(common.Hash{}); err == nil { + t.Fatalf("metaroot retrieval succeeded") + } +} |