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Paul Hauner c5c7476518 Web3Signer support for VC (#2522)
[EIP-3030]: https://eips.ethereum.org/EIPS/eip-3030
[Web3Signer]: https://consensys.github.io/web3signer/web3signer-eth2.html

## Issue Addressed

Resolves #2498

## Proposed Changes

Allows the VC to call out to a [Web3Signer] remote signer to obtain signatures.


## Additional Info

### Making Signing Functions `async`

To allow remote signing, I needed to make all the signing functions `async`. This caused a bit of noise where I had to convert iterators into `for` loops.

In `duties_service.rs` there was a particularly tricky case where we couldn't hold a write-lock across an `await`, so I had to first take a read-lock, then grab a write-lock.

### Move Signing from Core Executor

Whilst implementing this feature, I noticed that we signing was happening on the core tokio executor. I suspect this was causing the executor to temporarily lock and occasionally trigger some HTTP timeouts (and potentially SQL pool timeouts, but I can't verify this). Since moving all signing into blocking tokio tasks, I noticed a distinct drop in the "atttestations_http_get" metric on a Prater node:

![http_get_times](https://user-images.githubusercontent.com/6660660/132143737-82fd3836-2e7e-445b-a143-cb347783baad.png)

I think this graph indicates that freeing the core executor allows the VC to operate more smoothly.

### Refactor TaskExecutor

I noticed that the `TaskExecutor::spawn_blocking_handle` function would fail to spawn tasks if it were unable to obtain handles to some metrics (this can happen if the same metric is defined twice). It seemed that a more sensible approach would be to keep spawning tasks, but without metrics. To that end, I refactored the function so that it would still function without metrics. There are no other changes made.

## TODO

- [x] Restructure to support multiple signing methods.
- [x] Add calls to remote signer from VC.
- [x] Documentation
- [x] Test all endpoints
- [x] Test HTTPS certificate
- [x] Allow adding remote signer validators via the API
- [x] Add Altair support via [21.8.1-rc1](https://github.com/ConsenSys/web3signer/releases/tag/21.8.1-rc1)
- [x] Create issue to start using latest version of web3signer. (See #2570)

## Notes

- ~~Web3Signer doesn't yet support the Altair fork for Prater. See https://github.com/ConsenSys/web3signer/issues/423.~~
- ~~There is not yet a release of Web3Signer which supports Altair blocks. See https://github.com/ConsenSys/web3signer/issues/391.~~
2021-09-16 03:26:33 +00:00
.github Updates to make crates publishable (#2472) 2021-09-03 01:10:25 +00:00
account_manager Updates to make crates publishable (#2472) 2021-09-03 01:10:25 +00:00
beacon_node Reduce network debug noise (#2593) 2021-09-14 08:28:35 +00:00
book Web3Signer support for VC (#2522) 2021-09-16 03:26:33 +00:00
boot_node Update sloggers to v2.0.2 (#2588) 2021-09-14 06:48:26 +00:00
common Web3Signer support for VC (#2522) 2021-09-16 03:26:33 +00:00
consensus Web3Signer support for VC (#2522) 2021-09-16 03:26:33 +00:00
crypto Updates to make crates publishable (#2472) 2021-09-03 01:10:25 +00:00
lcli v1.5.2 (#2595) 2021-09-13 23:01:19 +00:00
lighthouse Shutdown gracefully on panic (#2596) 2021-09-15 00:01:18 +00:00
scripts Fix typo of vars.env (#2574) 2021-09-07 03:14:03 +00:00
slasher Update sloggers to v2.0.2 (#2588) 2021-09-14 06:48:26 +00:00
testing Web3Signer support for VC (#2522) 2021-09-16 03:26:33 +00:00
validator_client Web3Signer support for VC (#2522) 2021-09-16 03:26:33 +00:00
.dockerignore Use OS file locks in validator client (#1958) 2020-11-26 11:25:46 +00:00
.editorconfig Add editorconfig template 2019-03-11 15:09:57 +11:00
.gitignore Delete uncompressed genesis states (#2092) 2020-12-16 03:44:05 +00:00
.gitmodules Replace EF tests submodule with a makefile 2019-09-08 04:19:54 +10:00
bors.toml Add Windows to Bors config (#2358) 2021-05-20 00:23:08 +00:00
Cargo.lock Web3Signer support for VC (#2522) 2021-09-16 03:26:33 +00:00
Cargo.toml Web3Signer support for VC (#2522) 2021-09-16 03:26:33 +00:00
CONTRIBUTING.md Update CONTRIBUTING.md (#751) 2020-01-03 10:45:53 +11:00
Cross.toml Ensure RUSTFLAGS is passed through on cross compile (#1529) 2020-08-17 10:06:06 +00:00
Dockerfile Update outdated dependencies (#2425) 2021-07-05 00:54:17 +00:00
Dockerfile.cross Multiarch docker GitHub actions (#2065) 2020-12-09 06:06:37 +00:00
LICENSE Update License to Apache 2.0 2019-04-15 16:47:35 +10:00
Makefile Bump libp2p to address inconsistency in mesh peer tracking (#2493) 2021-08-12 01:59:20 +00:00
README.md Fix readme typo (#2312) 2021-04-14 02:30:54 +00:00
SECURITY.md Add how users should report security vulnerabilities for this repository (#2562) 2021-09-07 01:54:05 +00:00

Lighthouse: Ethereum 2.0

An open-source Ethereum 2.0 client, written in Rust and maintained by Sigma Prime.

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