82 lines
1.8 KiB
Go
82 lines
1.8 KiB
Go
package state
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import "github.com/tendermint/merkleeyes/iavl"
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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 *Bonsai
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deliverTx SimpleDB
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checkTx SimpleDB
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persistent bool
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}
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func NewState(tree *iavl.IAVLTree, persistent bool) State {
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base := NewBonsai(tree)
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return State{
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committed: base,
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deliverTx: base.Checkpoint(),
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checkTx: base.Checkpoint(),
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persistent: persistent,
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}
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}
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func (s State) Size() int {
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return s.committed.Tree.Size()
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}
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func (s State) Committed() *Bonsai {
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return s.committed
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}
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func (s State) Append() SimpleDB {
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return s.deliverTx
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}
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func (s State) Check() SimpleDB {
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return s.checkTx
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}
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// Hash applies deliverTx to committed and calculates hash
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//
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// Note the usage:
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// Hash -> gets the calculated hash but doesn't save
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// BatchSet -> adds some out-of-bounds data
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// Commit -> Save everything to disk and the same hash
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func (s *State) Hash() ([]byte, error) {
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err := s.committed.Commit(s.deliverTx)
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if err != nil {
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return nil, err
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}
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s.deliverTx = s.committed.Checkpoint()
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return s.committed.Tree.Hash(), nil
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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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s.committed.Tree.BatchSet(key, value)
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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, error) {
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// commit (if we didn't do hash earlier)
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err := s.committed.Commit(s.deliverTx)
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if err != nil {
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return nil, err
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}
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var hash []byte
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if s.persistent {
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hash = s.committed.Tree.Save()
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} else {
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hash = s.committed.Tree.Hash()
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}
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s.deliverTx = s.committed.Checkpoint()
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s.checkTx = s.committed.Checkpoint()
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return hash, nil
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}
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