7dbc59efeb
## Issue Addressed #3302 ## Proposed Changes Move the `reqwest::Client` from being initialized per-validator, to being initialized per distinct Web3Signer. This is done by placing the `Client` into a `HashMap` keyed by the definition of the Web3Signer as specified by the `ValidatorDefintion`. This will allow multiple Web3Signers to be used with a single VC and also maintains backwards compatibility. ## Additional Info This was done to reduce the memory used by the VC when connecting to a Web3Signer. I set up a local testnet using [a custom script](https://github.com/macladson/lighthouse/tree/web3signer-local-test/scripts/local_testnet_web3signer) and ran a VC with 200 validator keys: VC with Web3Signer: - `unstable`: ~200MB - With fix: ~50MB VC with Local Signer: - `unstable`: ~35MB - With fix: ~35MB > I'm seeing some fragmentation with the VC using the Web3Signer, but not when using a local signer (this is most likely due to making lots of http requests and dealing with lots of JSON objects). I tested the above using `MALLOC_ARENA_MAX=1` to try to reduce the fragmentation. Without it, the values are around +50MB for both `unstable` and the fix. |
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