48832fedc3
Add parity-db variant for trie benchmarks ( #5827 )
...
* parity-db bench
* use arkady suggestion
2020-04-30 07:33:31 +00:00
0f401e4699
Move spawning tasks from thread pools to Service's TaskManager for block importing ( #5647 )
...
Co-Authored-By: Pierre Krieger <pierre.krieger1708@gmail.com >
2020-04-29 18:46:39 +02:00
d870eb23e1
Remove sp-runtime dependency from sp-phragmen ( #5786 )
...
* Remove sp-runtime dependency from sp-phragmen
* Use regular derive(Debug) instead of RuntimeDebug
2020-04-28 17:21:10 +02:00
4fa5941f44
Move sc-client into sc-service ( #5502 )
...
* Drop client from sc-network and sc-client-db, move LongestChain to sc-client-api
* move leaves, cht, in_mem to sc-client-api, drop client from sc-finality-grandpa
* drop sc-service from sc-rpc
* drop sc-service from sc-consensus-aura
* drop sc-client from manual-seal and babe
* drop sc-client from utils/frame/rpc/system and utils/frame/benchmarking-cli
* drop sc-client from bin/node and bin/node-template
* drop sc-client
* fix tests
* remove check -p sc-client from gitlab.yml
* fix warnings
* fixes ui test
* fix light client tests
* adds associated Client type to AbstractService
* adds UsageProvider to Client
* fixed ui test, again
* tried and failed to get node-cli to compile for wasm
* thanks to tomaka for helping me get node-cli to compile for wasmm
* ui test pls pas 🙏🏾
* all tests passing 🪄
* no_run documentation code
* rm -f documentation code
* ClientProvider
* fix mega trait
* move LongestChain to sc-consensus, use adds minimal bounds to AbstractService::Client
* adds license to sc-consensus
Co-authored-by: Benjamin Kampmann <ben@parity.io >
2020-04-28 11:59:31 +00:00
ee54eff488
Enable Offchain Equalise ( #5683 )
...
* Master.into()
* Remove debug stuff
* Better license
* Migrate away from SimpleDispatchInfo
* Fix test
* Revert "Migrate away from SimpleDispatchInfo"
This reverts commit dbdd27fa19948f16bd17defdc01d3dd32986df11.
* Move to offchain randomness
* Fix tests
* Fix tests more
2020-04-27 18:51:46 +02:00
33d00692d8
Add append api and use it to deposit events ( #5795 )
...
* use append api to deposit events
* use optimized append
* one more optimization
* fix bug
* fix issues
* address review
2020-04-27 18:06:59 +02:00
64ed36d093
Support reference-counting state backend. ( #5769 )
...
* Optimize pinning
* Ref counting state backend
* Style
Co-Authored-By: Wei Tang <hi@that.world >
* Update Cargo.lock
* Handle empty node
Co-authored-by: Wei Tang <hi@that.world >
2020-04-27 12:24:50 +02:00
72ee7d5797
feat/ocw/bookkeeping ( #5200 )
...
Co-Authored-By: Kian Paimani <5588131+kianenigma@users.noreply.github.com >
Co-Authored-By: Tomasz Drwięga <tomusdrw@users.noreply.github.com >
2020-04-24 16:46:19 +02:00
000c924b62
Integrate pallet_contracts gas with the weight system ( #5712 )
...
Co-Authored-By: Tomasz Drwięga <tomusdrw@users.noreply.github.com >
Co-Authored-By: Sergei Pepyakin <sergei@parity.io >
2020-04-24 10:48:13 +02:00
46677555ac
Allow missing functions when checking the new runtime's version ( #5741 )
2020-04-23 14:54:52 +02:00
624e95b1af
Fix leak in stream notifications ( #5739 )
2020-04-23 12:01:09 +02:00
421ef498f4
network: Only insert global addresses into the DHT. ( #5735 )
...
* network: Only insert global addresses into the DHT.
Currently every address reported via libp2p-identify is inserted into
the DHT which thus contains a multitude of unreachable addresses such
as from 127.0.0.0/8 or 10.0.0.0/8.
Issue #5099 suggested a dedicated service over UDP to gauge the
reachability of an address, which would however incur extra I/O costs
and be of limited use.
As an alternative and simpler tactic, this PR only allows global IP
addresses to be inserted into the DHT unless an explicit command-line
flag `--allow-non-global-addresses-in-dht` is given or a node is
started with `--dev`. This opt-in behaviour is meant to allow
site-local networks to still make use of a DHT.
* Enable non-global in more test setups.
* Replace command-line option with different name.
* Another test fix.
2020-04-23 09:52:20 +02:00
5db336c743
client/network-gossip: Move sink IO outside of state_machine ( #5669 )
...
* client/network-gossip: Move sink IO outside of state_machine
`ConsensusGossip` is supposed to be a deterministic state machine.
`GossipEngine` wrapping `ConsensusGossip` should handle IO operations.
This commit moves the `message_sink` IO operations to `GossipEngine`.
More specifically on incoming messages a `GossipEngine` calls
`ConsensusGossip::on_incoming` to validate and register the messages.
`ConsensusGossip` returns the valid messages which are then forwarded by
`GossipEngine` to the upper layer via the `message_sinks`.
* client/network-gossip: Adjust and extend tests
* Update client/network-gossip/src/bridge.rs
Co-authored-by: Benjamin Kampmann <ben.kampmann@googlemail.com >
2020-04-20 16:40:44 -04:00
4ffcf98d8d
Child trie api changes BREAKING ( #4857 )
...
Co-Authored-By: thiolliere <gui.thiolliere@gmail.com >
2020-04-20 15:21:22 +02:00
319a00fb1c
Add a crate to test the in-browser light client. ( #4887 )
...
Co-Authored-By: Pierre Krieger <pierre.krieger1708@gmail.com >
2020-04-20 14:45:13 +02:00
1d1caed335
Improve tracing ( #5698 )
...
* Improve tracing implementation
* Enable tracing in runtime interfaces
* Switch to `TRACE` level
2020-04-20 14:37:27 +02:00
bc6ebabf23
Force libp2p 0.18.1 ( #5689 )
2020-04-17 23:00:44 +02:00
fd2cb9ca83
Transaction versioning in the RuntimeVersion ( #5582 )
...
* Add transaction_version
* Semantic versioning for runtimes
* Move new field to bottom
* Versioning
* Runtime versioning stuff.
* Fix test
* Adds tests and fixes bugs
* Bump runtime
Co-authored-by: Bastian Köcher <git@kchr.de >
2020-04-17 12:10:31 +02:00
fea626ca84
Add prometheus registry to transaction pool, with couple of initial metrics ( #5657 )
...
* make new contructor
* add metrics to txpool
* fix review
* fix doc comment
* change to counters
* Update client/transaction-pool/src/metrics.rs
Co-Authored-By: Max Inden <mail@max-inden.de >
* Update client/transaction-pool/src/metrics.rs
Co-Authored-By: Max Inden <mail@max-inden.de >
* Update client/transaction-pool/src/metrics.rs
Co-Authored-By: Max Inden <mail@max-inden.de >
* Update client/transaction-pool/src/lib.rs
Co-Authored-By: Max Inden <mail@max-inden.de >
* Update client/transaction-pool/src/lib.rs
Co-Authored-By: Max Inden <mail@max-inden.de >
* use dedicated wrapper
Co-authored-by: Max Inden <mail@max-inden.de >
2020-04-17 11:02:45 +02:00
276b27a7d4
Add migration for transaction-payment ( #5673 )
2020-04-17 09:56:17 +02:00
762c741c55
Clean Phragmén Equlise API ( #5452 )
...
* Clean phragmen API and equalise()
* Stabilize new api
* Fix phragmen fuzzers
* More fixes
* Make fuzzers reproducible
* improvements
* Make equalize update assignments as well.
* total function for staked_assignment.
* Fix fuzzer build
* remvoe TODO
* Fix a bunch more.
* clean stray debug stuff
* Update primitives/phragmen/src/lib.rs
Co-Authored-By: thiolliere <gui.thiolliere@gmail.com >
* fix range function
* fix number generator
Co-authored-by: thiolliere <gui.thiolliere@gmail.com >
2020-04-17 09:53:30 +02:00
bc0b8fbddf
Add performance tracing to validate_transaction ( #5671 )
...
* Validate transaction timeouts
* Add timing
* Add tracing to transaction validation.
* Fix docs.
Co-authored-by: NikVolf <nikvolf@gmail.com >
2020-04-17 08:42:50 +02:00
372f8b2c7e
Batch signature verification ( #5023 )
...
* create parallel tasks extension
* make type system happy
* basic externalities
* test for dynamic extensions
* batching test
* remove premature verify_batch
* shnschnorrkel batch
* alter test
* shnschnorrkel test
* executive batching
* some docs
* also multi/any signatgures
* error propagation
* styling
* make verification extension optional
* experimental ed25519 parallelization
* some merge fallout
* utilize task executor
* merge fallout
* utilize task executor more
* another merge fallout
* feature-gate sp-io
* arrange toml
* fix no-std
* sr25519 batching and refactoring
* add docs
* fix name
* add newline
* fix block import test
* long sr25519 test
* blocking instead of parking
* move everything in crypto
* return batch_verify to check :)
* use condvars
* use multi-threaded executor for benches
* don't call via host interface
* try no spawning
* add true
* cleanup
* straighten batching
* remove signature check from this test (?)
* remove now pointless test
* remove another now useless test
* fix warnings
* Revert "remove another now useless test"
This reverts commit bbdec24bb67ed4373072daef7c863e1a8825bd8b.
* rethink the sp-io-part
* Revert "remove now pointless test"
This reverts commit 4d553066322e65782264caa6053d4cd5538df977.
* fix wording
* add wording
* add todo and fix
* return check and fix
* add logging in sp-io
* Update primitives/io/src/batch_verifier.rs
Co-Authored-By: cheme <emericchevalier.pro@gmail.com >
* address review and use std condvar
* account for early exit
* address reivew
* address review
* more suggestions
* add docs for batch verification
* remove unused
* more review suggestions
* move to sp-runtime
* add expects
* remove blocks
* use entry
* Update primitives/io/src/batch_verifier.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update primitives/externalities/src/extensions.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* update overlooked note
* remove stupid return
* Update primitives/io/src/lib.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update primitives/io/src/lib.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* fix wording
* bump spec_version
Co-authored-by: cheme <emericchevalier.pro@gmail.com >
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com >
2020-04-16 21:40:04 +02:00
36243068bd
update parity-util-mem ( #5668 )
2020-04-16 21:38:04 +02:00
9a60df2c56
Trie integrated benchmark ( #5616 )
2020-04-16 15:18:16 +02:00
240b304b4c
Upgrade sysinfo to 0.13.3 ( #5659 )
...
This release includes a fix for an out of bound access that was reported
by one of the validators.
2020-04-16 12:59:31 +02:00
84991146e3
don't use default features to drop some dependencies ( #5658 )
2020-04-16 12:08:16 +02:00
980b635c8d
Weights to u64 + Balances Weights ( #5446 )
...
Co-Authored-By: Kian Paimani <5588131+kianenigma@users.noreply.github.com >
2020-04-16 10:43:18 +02:00
20b11b1770
client: avoid spamming telemetry on initial sync ( #5651 )
2020-04-15 21:49:21 +02:00
24fc051c86
Removed subdb dependency ( #5646 )
2020-04-15 15:55:45 +02:00
91af5b6fcc
New database trait ( #5549 )
...
* Introduce trait
* The trait
* Generic
* Basic impls.
* Remove unneeded bounds
* Minor changes
* Switch over to the new DB trait
* Integrated parity-db and added CLI for db selection
* Default impl.
* Fix logs.
* Started integrating subdb
* Apply suggestions from code review
Co-Authored-By: Cecile Tonglet <cecile@parity.io >
* Apply suggestions from code review
Co-Authored-By: Nikolay Volf <nikvolf@gmail.com >
* Enable subdb
* Bump parity-db
* Fixed CLI macro
* Fixed browser build
* Fixed features
* Sort out features
* Use parity-db from crates.io
* Typo
Co-authored-by: arkpar <arkady.paronyan@gmail.com >
Co-authored-by: Cecile Tonglet <cecile@parity.io >
Co-authored-by: Nikolay Volf <nikvolf@gmail.com >
2020-04-15 14:38:39 +02:00
3426d662f7
Switch pre-release version to dev ( #5637 )
2020-04-15 13:18:08 +02:00
cff1390456
Report tasks metrics to Prometheus ( #5619 )
...
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
2020-04-15 11:10:03 +02:00
51f9bb3c0e
Prepping release of alpha.6 ( #5629 )
...
* bumping version
* cargo update
* adding changelog
2020-04-14 21:41:49 +02:00
5afa74254e
Bump trie-db ( #5627 )
...
* Bump trie-db
* Bumped version in Cargo.toml
2020-04-14 14:46:33 +02:00
d1261d3482
Introduce Fixed128 from ORML to sp_arithmetic ( #5614 )
...
* add fixed128
* fix build
* re-export
* fix test
* saturating_pow
* Update primitives/arithmetic/src/fixed128.rs
Co-Authored-By: Shawn Tabrizi <shawntabrizi@gmail.com >
Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com >
2020-04-14 10:07:59 +02:00
a5da816e89
Fix native version text on startup ( #5618 )
...
* Native version text was borked.
* Unfix benchmarking.
2020-04-13 19:06:48 +02:00
ac9a852028
Update to libp2p 0.18 ( #5602 )
...
* Update to libp2p 0.18
* Update Cargo.lock
* Also bump in browser-utils
2020-04-09 18:41:21 +02:00
92b39365e3
Benchmarks now use in-memory db & cache ( #5586 )
...
* in-mem state for benchmarks
* Use caching state
* Update Cargo.lock
Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com >
2020-04-09 11:27:39 +02:00
7cdfaff12b
Add new RPC method to get the chain type ( #5576 )
...
* Add new RPC method to get the chain type
This adds a new RPC method to get the chain type of the running chain.
The chain type needs to be specified in the chain spec. This should make
it easier for tools/UI to display extra information without needing to
rely on parsing the chain name.
* Update client/rpc-api/src/system/mod.rs
Co-Authored-By: Tomasz Drwięga <tomusdrw@users.noreply.github.com >
* Primitive crate
* Feedback
Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com >
2020-04-08 20:41:51 +02:00
0629f999ff
Reuse wasmtime instances, the PR ( #5567 )
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* Preserve a single wasmtime instance.
* Sketch of wasm instance reusing.
* Refactor and docs.
* Rename state_snapshot to util module.
* Renaming.
* Comments.
* Error handling
* More fixes.
2020-04-08 18:45:25 +02:00
c73398ab03
remove flakiness ( #5572 )
2020-04-08 11:49:32 +02:00
f8c8355ac7
libp2p-next ( #5278 )
...
* Adapt to rust-libp2p#1440.
* Further adapt to libp2p/master.
* Update to libp2p-0.17
* Finishing touches.
* Remove stray TODO.
* Incorporate review feedback.
* Remove unused import.
2020-04-08 09:23:21 +02:00
3da069e359
CLI: refactoring: remove Options from sc_service::Configuration's fields ( #5271 )
...
* WIP
Forked at: d6aa8e954cd6aa8e954cd6aa8e954cd6aa8e954cd6aa8e954cd6aa8e954cd6aa8e954cseunlanlege@gmail.com >
* Fail if using proc_macro and build.rs is not set properly
* Dropped all get_ in front of methods
* Clean-up
* Fixing proc macro missing env var
* Get the configuration inside the Runtime (needed for polkadot)
* Clean-up
* Get is_dev from argument like the others
* Get chain ID instead of chain spec from shared params
* &self is passed to spec_factory/load_spec
* Wrong text
* Fix example
* Officialize macro and made a cool doc
* Renamed spec_factory to load_spec (substrate_cli_configuration)
* Removed not so useful ChainSpec
* Renamed SubstrateCLI to SubstrateCli
* Added changelog for impl_version being full now
* Renamed Runtime to Runner
* Update changelog to show example
* Removed option on database cache size
* WIP
Forked at: d6aa8e954cd6aa8e954cd6aa8e954cd6aa8e954cd6aa8e954cd6aa8e954cd6aa8e954cbkchr@users.noreply.github.com >
* Update client/cli/src/commands/runcmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/commands/export_blocks_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/commands/check_block_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update bin/node/cli/src/command.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update bin/node/cli/src/command.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/commands/export_blocks_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Revert "Update client/cli/src/commands/export_blocks_cmd.rs"
This reverts commit 5906776953392c02beac6bc0bf50f8cbe1a12a01.
* Revert "Update client/cli/src/commands/check_block_cmd.rs"
This reverts commit f705f42b7f3d732be001141afee210fe46a1ef47.
* Revert "Update client/cli/src/commands/export_blocks_cmd.rs"
This reverts commit 8d57c0550164449e6eb2d3bacb04c750c714fcea.
* Revert "Update client/cli/src/commands/runcmd.rs"
This reverts commit 93e74cf5d2e1c0dc49cdff8608d59fc40fc59338.
* Revert "Update client/cli/src/commands/runcmd.rs"
This reverts commit 11d527ba345c0d79f0d3b5b071933d95474d0614.
* Update client/cli/src/commands/export_blocks_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/commands/import_blocks_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/commands/purge_chain_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Changed ::sc_cli to $crate in the macro
* fixed tests
* fixed conflicts
* Fixing test
* Update client/cli/src/commands/purge_chain_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/params/pruning_params.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Remove comment as suggested
* Apply suggestion
* Update client/cli/src/commands/purge_chain_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/commands/purge_chain_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/commands/purge_chain_cmd.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update utils/frame/benchmarking-cli/src/command.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/runner.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/runner.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/runner.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/params/pruning_params.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/params/node_key_params.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/params/network_params.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/lib.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Update client/cli/src/config.rs
Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com >
* Added doc
* Fixed error introduced after applying suggestion
* Revert "Update client/cli/src/params/pruning_params.rs"
This reverts commit 0574d06a4f1efd86e94c1214420a12e7a4be0099.
* Print error
* Apply suggestions from code review
* Remove useless Results
* Fixed CI failing on polkadot approval
Co-authored-by: Seun Lanlege <seunlanlege@gmail.com >
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com >
2020-04-07 11:38:07 +02:00
fb9bbf306d
Benchmark Offences Pallet ( #5411 )
...
* Add initial report_ofence bench.
* Remove unused imports
* Style nit
* Add nominators
* Remove logs.
* Nits.
* Add nominators param.
* Reorg, comment.
* Remove whitespaces.
* Apply review suggestion: move benchmark to own crate.
* Remove import.
* Remove line.
* Add feature flag.
* Pass can_report.
* Cleaning up.
* More cleaning
2020-04-07 11:36:57 +02:00
d3cc051419
Generate Unit Tests for Benchmarks ( #5527 )
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* Update to latest staking
* generate tests for benchmarking
* add tests, fix warnings
* starting on democracy
* impl_benchmark_tests
* Way more readable
* add test feature flag (does this work?)
* Fix `successful_origin` impl
* democracry benchmark tests
* Fix example benchmarks, add tests
* identity benchmark tests
* Update im-online benchmark tests
* try to add session benchmarking tests (problem with mock)
* staking and timestamp
* add test for treasury, issue with dynamic contains
* utility
* Vesting
* test instead of check
* hide until we figure out what is wrong
* add docs
* close code
* Create custom mock for session-pallet-benchmarking
* Use refcell pattern
* make un-pub
* test-linux-stable includes `runtime-benchmarks` feature
* Revert "test-linux-stable includes `runtime-benchmarks` feature"
This reverts commit a2dab38abd18ac3eb8a6220e4a00e687740bd38c.
* run tests in `--release`
* undo balance change
* build wasm
2020-04-07 11:35:00 +02:00
247822bb33
Additional Metrics collected and exposed via prometheus ( #5414 )
...
This PR refactors the metrics measuring and Prometheus exposing entity in sc-service into its own submodule and extends the parameters it exposes by:
- system load average (over one, five and 15min)
- the TCP connection state of the process (lsof), refs #5304
- number of tokio threads
- number of known forks
- counter for items in each unbounded queue (with internal unbounded channels)
- number of file descriptors opened by this process (*nix only at this point)
- number of system threads (*nix only at this point)
refs #4679
Co-authored-by: Max Inden <mail@max-inden.de >
Co-authored-by: Ashley <ashley.ruglys@gmail.com >
2020-04-04 15:13:35 +02:00
6847f8452e
Simple Staking Payouts ( #5406 )
...
* Simple Payouts
* explicit test for out of order claiming
* Add `payout_all` benchmark
* Fix merge
* add docs
* change event to controller
* Fix timestamp test warnings
* Revert "change event to controller"
This reverts commit 5d4a97832d47fe1273602d5410774d5421940c4e.
* Update Reward event doc
* Add "non-production" test
* add unlock chunk to test
* fix merge
* End payout early if no reward points
* payout_validator -> payout_stakers
* bring back payout nominator/validator, but limit their use to before migration era
* Add test for before migration
* New payout works for the era that we migrate
* Fix logic, check that migration era works
* Migrate Era tests (copypasta)
* Move comment
* Add mock back to external functions
* Fixes based on review from gui
* Update Cargo.lock
* Update Cargo.lock
* small docs update
Co-authored-by: joepetrowski <joe@parity.io >
2020-04-04 14:50:08 +02:00
6eea144f04
Use custom runner for import benchmarks ( #5477 )
...
* custom benchmark runner
* add license preamble
* delete old benchmarks
* update toml
* imporove macro
* tabs
* add size
* size fixes
* add docs for cli
2020-04-03 16:41:33 +02:00
7983a8184b
Remove unused dependency on safe-mix ( #5495 )
2020-04-03 01:25:13 +02:00
Nikolay Volf