Coordinate restart with ConfigAck API #641
Description
In order to ensure that all the elements of a party receive the config block, the Consenter needs to wait for the party members to pull the new config block. We introduce the "ConfigAck" API, where the assembler, batcher and router notify the consenter when they had received the new config. Only then does the consenter of the party restart.
- Define ConfigAck API protos
- Send Acks from router batchers and assemblers
- Collect ConfigAcks in consenter