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Update Snapshot & Root approach

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Update Snapshot & Root approach to get the root always from the db,
except in the cases that the tree is a snapshot, in which the root will
be in memory.
In this way, when a snapshot is performed and the original tree gets
modifyed, the snapshot will still point to the old root. Also, the root
obtained from the db, uses also the db.ReadTx, so if the root is being
modifyied in the current tx (db.WriteTx), when getting the root it will
be return the lastest version that is in the tx but not yet in the db.
This commit is contained in:
arnaucube
2021-08-11 19:30:31 +02:00
parent 2514b3188f
commit 5f6c35e435
6 changed files with 262 additions and 141 deletions
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8
vt_test.go
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@@ -98,7 +98,9 @@ func testVirtualTree(c *qt.C, maxLevels int, keys, values [][]byte) {
// compute hashes, and check Root
_, err = vTree.computeHashes()
c.Assert(err, qt.IsNil)
c.Assert(vTree.root.h, qt.DeepEquals, tree.root)
root, err := tree.Root()
c.Assert(err, qt.IsNil)
c.Assert(vTree.root.h, qt.DeepEquals, root)
}
func TestVirtualTreeAddBatch(t *testing.T) {
@@ -136,7 +138,9 @@ func TestVirtualTreeAddBatch(t *testing.T) {
// compute hashes, and check Root
_, err = vTree.computeHashes()
c.Assert(err, qt.IsNil)
c.Assert(vTree.root.h, qt.DeepEquals, tree.root)
root, err := tree.Root()
c.Assert(err, qt.IsNil)
c.Assert(vTree.root.h, qt.DeepEquals, root)
}
func TestGetNodesAtLevel(t *testing.T) {