Weight annotation. (#3157)

* Make extrinsics extensible.

Also Remove old extrinsic types.

* Rest of mockup. Add tips.

* Fix some build issues

* Runtiem builds :)

* Substrate builds.

* Fix a doc test

* Compact encoding

* Extract out the era logic into an extension

* Weight Check signed extension. (#3115)

* Weight signed extension.

* Revert a bit + test for check era.

* Update Cargo.toml

* Update node/cli/src/factory_impl.rs

* Update node/executor/src/lib.rs

* Update node/executor/src/lib.rs

* Don't use len for weight - use data.

* Operational Transaction; second attempt (#3138)

* working poc added.

* some fixes.

* Update doc.

* Fix all tests + final logic.

* more refactoring.

* nits.

* System block limit in bytes.

* Silent the storage macro warnings.

* More logic more tests.

* Fix import.

* Refactor names.

* Fix build.

* Update srml/balances/src/lib.rs

* Final refactor.

* Bump transaction version

* Fix weight mult test.

* Fix more tests and improve doc.

* Bump.

* Make some tests work again.

* Fix subkey.

* Remove todos + bump.

* First draft of annotating weights.

* Refactor weight to u64.

* More refactoring and tests.

* New convert for weight to fee

* more tests.

* remove merge redundancy.

* Fix system test.

* Bring back subkey stuff.

* a few stress tests.

* fix some of the grumbles.

* Final nits.

* Update srml/system/src/lib.rs

Co-Authored-By: DemiMarie-parity <48690212+DemiMarie-parity@users.noreply.github.com>

* Scale weights by 1000.

* Bump.

* Fix decl_storage test.

substrate/core/sr-primitives/src/weights.rs

@@ -163,10 +163,8 @@ impl<T> ClassifyDispatch<T> for SimpleDispatchInfo {
 
 impl Default for SimpleDispatchInfo {
 	fn default() -> Self {
-		// This implies that the weight is currently equal to 100, nothing more
-		// for all substrate transactions that do NOT explicitly annotate weight.
-		// TODO #2431 needs to be updated with proper max values.
-		SimpleDispatchInfo::FixedNormal(100)
+		// Default weight of all transactions.
+		SimpleDispatchInfo::FixedNormal(10_000)
 	}
 }