Change Details

backports four commits from core PR 13033: f90c3a62f [index] TxIndex method to wait until caught up. 70d510d93 [index] Allow TxIndex sync thread to be interrupted. 94b4f8bbb [index] TxIndex initial sync thread. 34d68bf3a [index] Create new TxIndex class.

backports four commits from core PR 13033: f90c3a62f [index] TxIndex method to wait until caught up. 70d510d93 [index] Allow TxIndex sync thread to be interrupted. 94b4f8bbb [index] TxIndex initial sync thread. 34d68bf3a [index] Create new TxIndex class. Depends D2901

backports four commits from core PR 13033: f90c3a62f [index] TxIndex method to wait until caught up. 70d510d93 [index] Allow TxIndex sync thread to be interrupted. 94b4f8bbb [index] TxIndex initial sync thread. 34d68bf3a [index] Create new TxIndex class. Depends D2901