mratsim

ethereum/eth2.0-pm#193

Nimbus

• Mainnet launch, documentation

• Thanks for supporters, in particular those who supported us on Gitcoin over a year ago.

• Hot fixes yesterday, another scheduled today

• Release management: mailing lists, hash of releases

• Software:

mratsim

# beacon_chain
# Copyright (c) 2018-2020 Status Research & Development GmbH
# Licensed and distributed under either of
#   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
#   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.

import
  # Standard library
  std/[tables, os, options],

mratsim

#52 call - https://github.com/ethereum/eth2.0-pm/issues/191

Nimbus

Networking:
- Improve tracking of resources: streams, channels
- Gossipsub audit fixes (done late because 1.1 was not tested enough during its allocated phase)

Core:
- Toledo

mratsim

Agenda
https://github.com/ethereum/eth2.0-pm/issues/184
————————
————————
Testing and Release updates

Eth 1.0 release candidate WIP

Zinken

mratsim

import arraymancer
import sequtils
import random
import strformat

# https://d2l.ai/d2l-en.pdf 3.2 LinearRegressionImplementationfromScratch english version.
iterator data_iter[T](batch_size:Natural, features:Tensor[T], labels:Tensor[T]): (Tensor[T],Tensor[T]) =
  let num_examples = len(features)
  var indices = toSeq(countup(0,num_examples - 1))
  random.shuffle(indices)

mratsim

import
  # Internal
  ./milagro, ./common

proc PAIR_BLS12381_double(A: var ECP2_BLS12381, a, b, c: var FP2_BLS12381) {.importc, cdecl.}
proc PAIR_BLS12381_add(A, B: var ECP2_BLS12381, a, b, c: var FP2_BLS12381) {.importc, cdecl.}
proc ECP_BLS12381_set(P: var ECP_BLS12381, a, b: BIG_384): int {.importc, cdecl.}
proc PAIR_BLS12381_line(v: var FP12_BLS12381, A, B: var ECP2_BLS12381, Qx, Qy: ptr FP_BLS12381) {.importc, cdecl.}
proc PAIR_BLS12381_ate(r: var FP12_BLS12381, A: var ECP2_BLS12381, B: var ECP_BLS12381) {.importc, cdecl.}

mratsim

https://github.com/ethereum/eth2.0-pm/issues/181

Nimbus

Audit:
- Last phase of audit started
  - Validator core: secrets & keystores
  - Attestation/block proposal + Slashing protection
  - Gossipsub (1.1)
  - RPC

mratsim

Agenda: https://github.com/ethereum/eth2.0-pm/issues/178

Nimbus:

Audit:
- Highlighted several potential for malicious attestations or blocks
  to exhaust the system memory, so now use bounded buffer and explicit drops
  when late
  
Current focus:

mratsim

https://github.com/ethereum/eth2.0-pm/issues/173

Nimbus

Medalla:
1. Losing peers
2. Syncing performance
3. (very) High-memory usage for 2 caches:
    - epoch cache that in particular caches validators public keys
      was way too aggressive after a couple speed optimizations (gigabytes!)

mratsim

https://github.com/ethereum/eth2.0-pm/issues/171

Nimbus:

Medalla issues:

1. The increased number of attestations in Medalla revealed limits in our stack between libp2p and the beacon node. In particular we are doing the same work multiple times especially in periods of non-finality. This is fixed

2. Attestation processing bug: we wanted to optimize database loading by delaying
    the deserialisation of public keys/signatures. 2 approaches were explored