def _hash_and_save(self, node):
"""
Saves a node into the database and returns its hash
"""
validate_is_bin_node(node)
node_hash = keccak(node)
self.db[node_hash] = node
return node_hash
def if_branch_valid(branch, root_hash, key, value):
# value being None means the key is not in the trie
if value is not None:
validate_is_bytes(key)
# branch must not be empty
assert branch
for node in branch:
validate_is_bin_node(node)
db = {keccak(node): node for node in branch}
assert BinaryTrie(db=db, root_hash=root_hash).get(key) == value
return True
def root_node(self, node):
validate_is_bin_node(node)
self.root_hash = self._hash_and_save(node)