> echo hello-> data: hello > info -> data: {"size":0} > commit -> data: 0x > append_tx abc-> code: OK > info -> data: {"size":1} > commit -> data: 0x750502FC7E84BBD788ED589624F06CFA871845D1 > query abc-> code: OK-> data: {"index":0,"value":"abc","exists":true} > append_tx def=xyz-> code: OK > commit -> data: 0x76393B8A182E450286B0694C629ECB51B286EFD5 > query def-> code: OK-> data: {"index":1,"value":"xyz","exists":true}