* Prices API
* Add current prices
* Historical prices persist
* Add mutexs
* multiple providers
* Handle startup
* Edge case where historical price is requested for current
* fix median edge case
* Don't return too old last price
* bug fixes
* price metrics and logging
* warnings
PR 320 introduced a bug that causes the `blocks` and `lengths` database
files to be located one directory level higher than it they should be.
The bug doesn't cause any functional problem, it only makes the
lightwalletd do more work (re-download the block cache), and it also
makes it not possible to switch between testnet and mainnet.
This patch locates the database files back where they belong.
- improved corruption recovery (don't back up by just 1 block at a time)
- move darksidewallet gRPCs to their own .proto file
- this force-push removes my commits for reorg testing using SetState
adityapk00
Aditya Kulkarni
adityapk00
Larry Ruane
Ben Wilson