# EF Research & Görli Testnet "Multi-Client Testnet for ETH 2.0"
Quik call with Hsiao-Wei, Danny, and Afri on March 1st, 2020

- TL;DR:
- Görli supporting ETH 2.0 testnet efforts would be much appreciated
- Danny et al. are super busy, and client teams are deep in their own work
- more manpower would be beneficial
- timing now is almost perfect

- Timing
- currently only single client testnets, mainly Prysm, Lighthouse, and Nimbus
- only Prysm testnet is really user-facing
- interoperability only on P2P-layer so far
- Danny wants to see multi-client testnet efforts to kick off in the next two months

- Client Status
- Prysmatic Labs Prysm being testnet ready
- Sigma Prime Lighthouse has a stable client, testnet ready
- Status Nimbus is in a similar boat to Lighthouse, only internal testnets so far
- ConsenSys Artemis/Teku is a little bit behind but well funded
- EF Trinity is in a similar spot to Teku
- ChainSafe Lodestar might never go in production as client but provides amazing modular tooling for developers
- Nethermind Cortex is very behind, just getting started
- Parity Shasper is discontinued
- Yeeth is discontinued
- Unclear: Harmony, Aleth

- Process (TBD)
- devops/blockchain operations can be started right now
- clients often try to sync other's testnets
- mainly testing synchronization for now
- next multi-client testing against Lighthouse and Prysm
- start coordinating multi-client testing after March 2020
- goal should be longer standing multi-client testnet and/or incentivized testnets
- but also short term testnets to break and fail quickly
- multi-client testnet open for users and validators
- optimistic start date mid April, early May 2020
- requires ceremony, could be coordinated by Görli
- requires deposit contract address
- test different interfaces for contract
- simulate the ceremony

- Other things
- consider incentivized adversarial network
- comms on Discord, can create private or public channels
- some work can be done today
- most of the teams will be in Paris next week
- Danny really wants to kick this of latest in April
- even though I didn't ask, they said additional grant funding would be available

- Research topics (for Afri and anyone else who's a bit behind in ETH 2.0)
- What's required to bootstrap a single-client testnet?
- What's required to make it a multi-client testnet?
- [What does the ceremony look like and what does it involve?](https://ethereum.stackexchange.com/questions/80258/what-does-the-beacon-chain-deposit-contract-ceremony-entail)
- How to generate/deploy the deposit contract (and where, Görli?)?
- [How are clients configuring networks, are there any standards on chain specifications?](https://ethereum.stackexchange.com/questions/80264/how-would-a-chain-specification-for-a-beacon-chain-look-like)

- Misc notes for incentivized testnets
- https://github.com/cosmos/game-of-stakes/blob/master/RULES.md
- https://github.com/cosmos/game-of-stakes

- Unrelated readlist (PoS)
- https://forum.kusama.network/t/elastic-validator-sets-on-kusama/194/3

-----

Lighthouse tooling:

> Basically you read the contract logs, block by block, until the eth1 block timestamp is greater than the minimum genesis time and the minimum number of active validators is met or exceeded. Then you deterministically plonk out a genesis state.
>
> We have a CLI utility that will read eth1 logs and produce a genesis.ssz file when it can.
>
> It’s in our `lcli` (Lighthouse CLI) tool. It contains a bunch of tools for creating testnets.
>
> With `lcli` you can produce a new testnet directory, deploy a deposit contract, generate a genesis state file and destroy the deposit contract when you’re done.
It’s not very well documented (beyond the `--help` flag) since it’s a bit of a developer tool.

~/.opt/lighthouse master
❯ ll target/release/lcli --help
Usage: ls [OPTION]... [FILE]...
List information about the FILEs (the current directory by default).
Sort entries alphabetically if none of -cftuvSUX nor --sort is specified.

Mandatory arguments to long options are mandatory for short options too.
  -a, --all                  do not ignore entries starting with .
  -A, --almost-all           do not list implied . and ..
      --author               with -l, print the author of each file
  -b, --escape               print C-style escapes for nongraphic characters
      --block-size=SIZE      with -l, scale sizes by SIZE when printing them;
                               e.g., '--block-size=M'; see SIZE format below
  -B, --ignore-backups       do not list implied entries ending with ~
  -c                         with -lt: sort by, and show, ctime (time of last
                               modification of file status information);
                               with -l: show ctime and sort by name;
                               otherwise: sort by ctime, newest first
  -C                         list entries by columns
      --color[=WHEN]         colorize the output; WHEN can be 'always' (default
                               if omitted), 'auto', or 'never'; more info below
  -d, --directory            list directories themselves, not their contents
  -D, --dired                generate output designed for Emacs' dired mode
  -f                         do not sort, enable -aU, disable -ls --color
  -F, --classify             append indicator (one of */=>@|) to entries
      --file-type            likewise, except do not append '*'
      --format=WORD          across -x, commas -m, horizontal -x, long -l,
                               single-column -1, verbose -l, vertical -C
      --full-time            like -l --time-style=full-iso
  -g                         like -l, but do not list owner
      --group-directories-first
                             group directories before files;
                               can be augmented with a --sort option, but any
                               use of --sort=none (-U) disables grouping
  -G, --no-group             in a long listing, don't print group names
  -h, --human-readable       with -l and -s, print sizes like 1K 234M 2G etc.
      --si                   likewise, but use powers of 1000 not 1024
  -H, --dereference-command-line
                             follow symbolic links listed on the command line
      --dereference-command-line-symlink-to-dir
                             follow each command line symbolic link
                               that points to a directory
      --hide=PATTERN         do not list implied entries matching shell PATTERN
                               (overridden by -a or -A)
      --hyperlink[=WHEN]     hyperlink file names; WHEN can be 'always'
                               (default if omitted), 'auto', or 'never'
      --indicator-style=WORD  append indicator with style WORD to entry names:
                               none (default), slash (-p),
                               file-type (--file-type), classify (-F)
  -i, --inode                print the index number of each file
  -I, --ignore=PATTERN       do not list implied entries matching shell PATTERN
  -k, --kibibytes            default to 1024-byte blocks for disk usage;
                               used only with -s and per directory totals
  -l                         use a long listing format
  -L, --dereference          when showing file information for a symbolic
                               link, show information for the file the link
                               references rather than for the link itself
  -m                         fill width with a comma separated list of entries
  -n, --numeric-uid-gid      like -l, but list numeric user and group IDs
  -N, --literal              print entry names without quoting
  -o                         like -l, but do not list group information
  -p, --indicator-style=slash
                             append / indicator to directories
  -q, --hide-control-chars   print ? instead of nongraphic characters
      --show-control-chars   show nongraphic characters as-is (the default,
                               unless program is 'ls' and output is a terminal)
  -Q, --quote-name           enclose entry names in double quotes
      --quoting-style=WORD   use quoting style WORD for entry names:
                               literal, locale, shell, shell-always,
                               shell-escape, shell-escape-always, c, escape
                               (overrides QUOTING_STYLE environment variable)
  -r, --reverse              reverse order while sorting
  -R, --recursive            list subdirectories recursively
  -s, --size                 print the allocated size of each file, in blocks
  -S                         sort by file size, largest first
      --sort=WORD            sort by WORD instead of name: none (-U), size (-S),
                               time (-t), version (-v), extension (-X)
      --time=WORD            with -l, show time as WORD instead of default
                               modification time: atime or access or use (-u);
                               ctime or status (-c); also use specified time
                               as sort key if --sort=time (newest first)
      --time-style=TIME_STYLE  time/date format with -l; see TIME_STYLE below
  -t                         sort by modification time, newest first
  -T, --tabsize=COLS         assume tab stops at each COLS instead of 8
  -u                         with -lt: sort by, and show, access time;
                               with -l: show access time and sort by name;
                               otherwise: sort by access time, newest first
  -U                         do not sort; list entries in directory order
  -v                         natural sort of (version) numbers within text
  -w, --width=COLS           set output width to COLS.  0 means no limit
  -x                         list entries by lines instead of by columns
  -X                         sort alphabetically by entry extension
  -Z, --context              print any security context of each file
  -1                         list one file per line.  Avoid '\n' with -q or -b
      --help     display this help and exit
      --version  output version information and exit

The SIZE argument is an integer and optional unit (example: 10K is 10*1024).
Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (powers of 1000).
Binary prefixes can be used, too: KiB=K, MiB=M, and so on.

The TIME_STYLE argument can be full-iso, long-iso, iso, locale, or +FORMAT.
FORMAT is interpreted like in date(1).  If FORMAT is FORMAT1<newline>FORMAT2,
then FORMAT1 applies to non-recent files and FORMAT2 to recent files.
TIME_STYLE prefixed with 'posix-' takes effect only outside the POSIX locale.
Also the TIME_STYLE environment variable sets the default style to use.

Using color to distinguish file types is disabled both by default and
with --color=never.  With --color=auto, ls emits color codes only when
standard output is connected to a terminal.  The LS_COLORS environment
variable can change the settings.  Use the dircolors command to set it.

Exit status:
 0  if OK,
 1  if minor problems (e.g., cannot access subdirectory),
 2  if serious trouble (e.g., cannot access command-line argument).

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Full documentation <https://www.gnu.org/software/coreutils/ls>
or available locally via: info '(coreutils) ls invocation'