* client/finality-grandpa: Add regression test observer polling network

Ensure `Future` implementation of `ObserverWork` is polling its
`NetworkBridge`. Regression test for bug introduced in d4fbb897 and
fixed in 7d58ceeb

.

When polled, `NetworkBridge` forwards reputation change requests from
the `GossipValidator` to the underlying `dyn Network`. This test
triggers a reputation change by calling `GossipValidator::validate` with
an invalid gossip message. After polling the `ObserverWork` which should
poll the `NetworkBridge`, the reputation change should be forwarded to
the test network.

* Nits

Co-authored-by: Max Inden <[email protected]>

* Adding Serde:Deserialise to UncheckExtrinsics

to be able to use the ChainApi RPC from the client side

* Update primitives/runtime/src/generic/unchecked_extrinsic.rs

Co-authored-by: Bastian Köcher <[email protected]>

* Initial version.

* Fix tests.

* Refactor using StorageValueRef.

* Add tests and apply review suggestions.

* Bump runtime.

Co-authored-by: Gavin Wood <[email protected]>

* Small follow-up docs improvements in rent module

* Update frame/contracts/src/rent.rs

Co-Authored-By: thiolliere <[email protected]>

* Use a shorter version of the sentence

Co-authored-by: thiolliere <[email protected]>

* Initial approach

* Introduce the pallet-contracts-common crate

* Add rent::compute_rent_projection

* Wire everything together

* Fix build error.

* Rename EvictionDate → EvictionAt.

* Clean.

* Renaming and cleaning.

* Add documentation for rent_projection RPC.

* Add documentation for rent_projection runtime API.

* Refactor rent_budget.

Merge it with subsistence_treshold.

* Bump impl_version

* Constrain RPC impl with Block::Header::Number.

* Rename pallet-contracts-common into -primitives

* Add a comment for `compute_rent_projection` on the usage

* Small tidying

* Update to the latest crate names

* Add to post initial rename fixes

* Cleanup transaction pool deps

* Fix it properly

* Fix doc test

* Expose information about the extrinsic in the metadata

This pr exposes some information about the extrinsic used in the runtime
via metadata. The following information are exposed:

- Version of the extrinsic
- List of all signed extensions used by the extrinsic.

* Increment `spec_version`

To my knowledge, we don't keep wasm blobs checked in anymore.

It changes the way we extended the CLI functionalities of substrate to allow more flexibility. (If this was not clear, here is another version: it changes the `sc_cli` API to allow more flexibility).

This touches a few important things:
 - the startup of the async task with tokei:
    This was in node and node-template and I moved it to substrate. The idea is to have 1 time the code that handles unix signals (SIGTERM and SIGINT) properly. It is however possible to make this more generic to wait for a future instead and provide only a helper for the basic handling of SIGTERM and SIGINT.
 - increased the version of structopt and tokei
 - no more use of structopt internal's API
 - less use of generics

Related to #4643 and https://github.com/paritytech/cumulus/pull/42: the implementation of "into_configuration" and "get_config" are similar but with better flexibility so it is now possible in cumulus to have the command-line arguments only of the run command for polkadot if we want

Related to https://github.com/paritytech/cumulus/issues/24 and https://github.com/paritytech/cumulus/issues/34 : it will now be possible to make a configuration struct for polkadot with some overrides of the default parameters much more easily.

I don't see any good reason to build with --release to test this but this step takes 8-8:30 min on the CI and I suspect we would save some time by using the debug build instead.

Patch d4fbb897 reintegrated the periodic neighbor packet worker, by
moving its logic into a `Future` implementation on `NetworkBridge` which
needs to be polled by its upper layer.

Polling by the upper layer was implemented within the `Future`
implementation of the `VoterWork` struct but not within the `Future`
implementation of the `ObserverWork` struct. This patch adds polling of
the `NetworkBridge` to the latter.

* Identity should bound additional fields

* ump rutnime

* Add `get_global` for `Sandbox`

This pr adds `get_global` to retrieve a `global` variable from an
instantiated sandbox wasm blob.

* Bump `spec_version`

* Update primitives/wasm-interface/src/lib.rs

Co-Authored-By: Sergei Pepyakin <[email protected]>

* `get_global` -> `get_global_val`

Co-authored-by: Sergei Pepyakin <[email protected]>
Co-authored-by: Gavin Wood <[email protected]>

* Remove free transaction dos vectors.

* Bump spec version

* Indentation.

* Update frame/support/src/weights.rs

Co-authored-by: Bastian Köcher <[email protected]>

* LinkedMap doesn't implement StoragePrefixedMap

* fix test

* adding license fields to all crates

* Apply suggestions from code review

Co-Authored-By: Bastian Köcher <[email protected]>

Co-authored-by: Bastian Köcher <[email protected]>

A light client can not be a validator, so we should not set `authority
== true` in dev mode.

* Rpc api for offchain storage

* Replace Vec<u8> to Bytes, replace Mutex to RwLock

* Remove pub

* Modify copyright year

* Remove unneccessary duplication in generic asset create

* Increment impl_version due to refactoring generic_asset

* Display error message when checking has_api.

* Cargo.lock.

* Add SS58 network identifier for Centrifuge

* Bump version

* Update template to use decl_error

* Test for error on template

* Comments

* Reorder decl_* blocks: storage, event, error, module

* Remove TODOs

* Clarify comment on type Error = Error<T>

* Print extrinsic failed error always, not just on import

Before we printed the error of a transaction only when importing a
block, this pr changes it to print the error also at building the block.

* Increment `impl_version`

* Make sure to destroy state in case of error.

* Update client/src/call_executor.rs

* Update client/src/call_executor.rs

Co-authored-by: Bastian Köcher <[email protected]>

* WASM runtime switch to import memory

Up to now runtimes have exported their memory. To unify it with
sandboxing, this pr switches runtimes to import memory as well.

From a functional perspective, exporting/importing memory makes no
difference to the runtime.

To provide backwards compatibility, WASM exported memory is still supported.

* Revert debug stuff

* Revert some stuff

* Fixes for libp2p 0.15

* More work

* Update libp2p

* Update to libp2p 0.15

* transaction pool changes

* service & network changes

* address review

* reduce future pool