* Modify replay stage to ask db_ledger for updates instead of reading from upstream channel
* Add signal for db_ledger to update listeners about updates
* fix flaky test
* Add timeout to Replicator::new; used when polling for leader
* Add timeout functionality to replicator ledger download
Shares the same timeout as polling for leader
Defaults to 30 seconds
* Add docs for Replicator::new
* Add trait for RpcRequestHandler trait for RpcClient and add MockRpcClient for unit tests
* Add request_airdrop integration test
* Add timestamp_tx, witness_tx, and cancel_tx to wallet integration tests; add wallet integration tests to test-stable
* Add test cases
* Ignore plentiful sleeps in unit tests
* Use vote signer service in fullnode
* Use native types for signature and pubkey, and address other review comments
* Start local vote signer if a remote service address is not provided
* Rebased to master
* Fixes after rebase
* Also implement more storage contract logic
* Add transactions for proof validation,
* Move storage state members into system storage account userdata
* Remove logging init from storage program: saw a crash in a test
indicating the logger being init'ed twice.
* Add entry_height mining proof to indicate which segment the result is
for
* Add an interface to get storage miner pubkeys for a given entry_height
* Add an interface to get the current storage mining entry_height
* Set the tvu socket to 0.0.0.0:0 in replicator to stop getting entries
after the desired ledger segment is downloaded.
* Use signature of PoH height to determine which block to download for
replicator.
* Insert blobs into db_ledger in broadcast stage to support leader to validator transitions
* Add transmitting real slots to broadcast stage
* Handle real slots instead of default slots in window
* Switch to dummy repair on slots and modify erasure to support leader rotation
* Shorten length of holding locks
* Remove logger from replicator test
* Move more of the replicator logic into the replicator class
* Add support for the RPC interface to query the storage last_id value
that the replicator would sign and use to pick a block.
* Fix replicator connecting to gossip and change test to exercise that
scenario.