84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
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package merkle
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import (
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"github.com/tendermint/merkleeyes/iavl"
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"github.com/tendermint/tmlibs/merkle"
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)
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// State represents the app states, separating the commited state (for queries)
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// from the working state (for CheckTx and AppendTx)
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type State struct {
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committed merkle.Tree
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deliverTx merkle.Tree
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checkTx merkle.Tree
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persistent bool
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}
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func NewState(tree merkle.Tree, persistent bool) State {
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return State{
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committed: tree,
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deliverTx: tree.Copy(),
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checkTx: tree.Copy(),
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persistent: persistent,
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}
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}
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func (s State) Committed() Bonsai {
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return Bonsai{s.committed}
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}
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func (s State) Append() Bonsai {
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return Bonsai{s.deliverTx}
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}
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func (s State) Check() Bonsai {
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return Bonsai{s.checkTx}
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}
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// Hash updates the tree
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func (s *State) Hash() []byte {
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return s.deliverTx.Hash()
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}
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// BatchSet is used for some weird magic in storing the new height
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func (s *State) BatchSet(key, value []byte) {
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if s.persistent {
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// This is in the batch with the Save, but not in the tree
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tree, ok := s.deliverTx.(*iavl.IAVLTree)
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if ok {
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tree.BatchSet(key, value)
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}
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}
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}
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// Commit save persistent nodes to the database and re-copies the trees
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func (s *State) Commit() []byte {
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var hash []byte
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if s.persistent {
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hash = s.deliverTx.Save()
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} else {
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hash = s.deliverTx.Hash()
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}
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s.committed = s.deliverTx
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s.deliverTx = s.committed.Copy()
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s.checkTx = s.committed.Copy()
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return hash
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}
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// Bonsai is a deformed tree forced to fit in a small pot
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type Bonsai struct {
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merkle.Tree
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}
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// Get matches the signature of KVStore
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func (b Bonsai) Get(key []byte) []byte {
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_, value, _ := b.Tree.Get(key)
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return value
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}
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// Set matches the signature of KVStore
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func (b Bonsai) Set(key, value []byte) {
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b.Tree.Set(key, value)
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}
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