lighthouse/consensus/serde_utils/src/json_str.rs
Michael Sproul e961ff60b4 Implement standard keystore API (#2736)
## Issue Addressed

Implements the standard key manager API from https://ethereum.github.io/keymanager-APIs/, formerly https://github.com/ethereum/beacon-APIs/pull/151
Related to https://github.com/sigp/lighthouse/issues/2557

## Proposed Changes

- [x] Add all of the new endpoints from the standard API: GET, POST and DELETE.
- [x] Add a `validators.enabled` column to the slashing protection database to support atomic disable + export.
- [x] Add tests for all the common sequential accesses of the API
- [x] Add tests for interactions with remote signer validators
- [x] Add end-to-end tests for migration of validators from one VC to another
- [x] Implement the authentication scheme from the standard (token bearer auth)

## Additional Info

The `enabled` column in the validators SQL database is necessary to prevent a race condition when exporting slashing protection data. Without the slashing protection database having a way of knowing that a key has been disabled, a concurrent request to sign a message could insert a new record into the database. The `delete_concurrent_with_signing` test exercises this code path, and was indeed failing before the `enabled` column was added.

The validator client authentication has been modified from basic auth to bearer auth, with basic auth preserved for backwards compatibility.
2022-01-30 23:22:04 +00:00

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Rust

//! Serialize a datatype as a JSON-blob within a single string.
use serde::{
de::{DeserializeOwned, Error as _},
ser::Error as _,
Deserialize, Deserializer, Serialize, Serializer,
};
/// Serialize as a JSON object within a string.
pub fn serialize<T, S>(value: &T, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
T: Serialize,
{
serializer.serialize_str(&serde_json::to_string(value).map_err(S::Error::custom)?)
}
/// Deserialize a JSON object embedded in a string.
pub fn deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error>
where
D: Deserializer<'de>,
T: DeserializeOwned,
{
let json_str = String::deserialize(deserializer)?;
serde_json::from_str(&json_str).map_err(D::Error::custom)
}