blacktemplar 59adc5ba00 Implement key cache to reduce keystore loading times for validator_client (#1695) ... ## Issue Addressed #1618 ## Proposed Changes Adds an encrypted key cache that is loaded on validator_client startup. It stores the keypairs for all enabled keystores and uses as password the concatenation the passwords of all enabled keystores. This reduces the number of time intensive key derivitions for `N` validators from `N` to `1`. On changes the cache gets updated asynchronously to avoid blocking the main thread. ## Additional Info If the cache contains the keypair of a keystore that is not in the validator_definitions.yml file during loading the cache cannot get decrypted. In this case all the keystores get decrypted and then the cache gets overwritten. To avoid that one can disable keystores in validator_definitions.yml and restart the client which will remove them from the cache, after that one can entirely remove the keystore (from the validator_definitions.yml and from the disk). Other solutions to the above "problem" might be: * Add a CLI and/or API function for removing keystores which will update the cache (asynchronously). * Add a CLI and/or API function that just updates the cache (asynchronously) after a modification of the `validator_definitions.yml` file. Note that the cache file has a lock file which gets removed immediatly after the cache was used or updated.		2020-10-05 10:50:43 +00:00
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src	Implement key cache to reduce keystore loading times for validator_client (#1695)	2020-10-05 10:50:43 +00:00
tests	Support multiple BLS implementations (#1335)	2020-07-25 02:03:18 +00:00
Cargo.toml	Update external deps (#1711)	2020-10-05 08:22:19 +00:00