This reverts commit e0ece29e.

This reverts commit 5888abaf.

* Fix typo

* Make minimum_balance docs clearer

* Fix transfer() docs

* [examples] Add missing accumulator/std

* Fix check-examples.sh

* Fix check-workspaces.sh

* Line up results

* Complete crates

* Update scripts/check-examples.sh

Co-authored-by: Hero Bird <robin.freyler@gmail.com>

* Introduce differentiation purely_std_crate/also_wasm_crate

* Include crates lang/codegen and metadata in CI testing

Co-authored-by: Hero Bird <robin.freyler@gmail.com>

* [releases] add release notes for ink! 3.0-rc2

* [*] bump crate versions to ink! 3.0-rc2

* [releases] add missing ink! 3.0-rc2 release note

* [benches] fix lazy benchmarks

* [*] fix Cargo.toml documentation links

* [readme] show CI status of master branch always

* [readme] misc improvements

* [storage] make re-export of LazyHashMap inline

* [releases] add notes about ink_core split

* [allocator] add some crate level docs

* [storage] impl scale_info::TypeInfo for ink_storage::alloc::Box

* [metadata] improve docs slightly

* [storage] re-introduce StorageLayout impl for storage::Box

* [chores] Fix typo entitiy ➜ entity

* [storage] Extract push_pull_works_for_primitive macro

* [storage] Add tests for Tuple

* [storage] Add tests for Option, Result, Box

* [storage] Add tests for Array

* [storage] Add fuzz tests for primitives

* [chores] Fix typo

* [storage] Add fuzz test for HashMap::defrag

* [storage] Improve unit tests

* [storage] Clarify TestResult::discard

* [storage] make Lazy::laze constructor crate private

* [storage] fix Lazy SpreadLayout impl behaving incorrectly when not used

* [storage] remove redundant state replacement in StorageEntry::push_packed_root

* [storage] add regression test for the fixed bug

* [storage] clean up code between LazyCell and StorageEntry

* [storage] apply rustfmt

* [chores] Fix typo

* [chores] Update list of topics

* [chores] ink ➜ ink!

* [chores] Update Riot channel link

* BinaryHeap::new()

* Failing FromIterator test

* Dumb push impl

* Dumb peek impl

* Naive push implementation

* Copy in some reference impls for inspiration

* WIP: use storage2::Vec and implement pop

* Fix sift_up

* Fix sift_down

* Test with heap from slice

* Add pass through clear impl

* Add storage trait impls

* Add binary_heap bench, start experimentation

# Conflicts:
#	core/Cargo.toml

* Add tests for push/pull from storage

* Get basic bench working for pushing largest value

* Fmt

* Prevent storage from being cleared in test env

* iter batched

* Make inline setup to test consistency

* Revert to iter_batch tests

* Add populated cache benches

* Fmt

* Factor out bench push

* Refactor benchmark loop on push

* Configure warm-up and measurement times to improve consistency

* Remove redundant test

* Refactor push benches

* Refactor push benches again

* Add Pop benchmark

* Fmt

* Add some comments to the benchmarks

* Remove some todos

* Use iter_batched_ref

* Fix pop benchmark name

* Add test for worst case O(log n) push

* Fmt

* Add push test

* Add peek and pop test

* Fix up sift comments and log tests

* Comments

* Add Reverse wrapper type for min heaps

* Fmt

* Peek mut

* Fmt

* Add empty tests

* Check complexity of pushing smallest value

* Test drop clears cells

* Fix stable build

* Basic property test

* Fix wasm build

* Fmt

* Derive Default, PartialEq, Eq

* Add property test to feature

* Fix doc links

* Fmt

* Remove commented out println

* Avoid potential false positive

* Add punctuation

* Comments

* Fmt

* [core] Fix comment

* [core] Remove unnecessary println

* [core] Store two children in one Cell

* [core] Add group_count() for fuzz tests

* [core] Apply cargo fmt

* [core] Fix imports for std env

* [core] Improve comments describing read/write ops

* [core] Improve feature switch

* [core] Improve code readability

* [core] Apply general comments

* [core] Add group.exists() and make more use of Group API

* [core] Major renaming

* [core] Implement AlwaysPacked for Children

* [core] Improve comments and panic messages

* [core] Improve comments

* [core] Improve comments

* [core] Improve comments

* [core] Improve comments

* [core] Improve comments

* [core] Improve comments

* [core] Migrate children.exists() to children.is_empty()

* [core] Fix children.is_empty()

* [core] Bring back PackedLayout impl

* Move binary_heap to crates

* Make it compile

* Fix up doc test and benches

* Fmt

* Fix license headers

* [core] Improve Children API

* [core] Use super instead of crate import

* [core] Fix comments

* [core] Rename Elements to ChildrenVector

* [core] Fix comments

* [core] Fix footprint

* [core] Improve count()

* [core] Move iterator to correct file

* [core] Restrain visibility

* [core] Fix comments

* [core] Fix imports

* [core] Rename ChildrenVector to ChildrenVec

* [core] Improve imports

* [storage] Use crate import instead of super

* [storage] Remove some pub(super)

* [storage] Add #[inline]

* [storage] Rename push_to to insert

* [storage] Add rational for child_count

* [storage] Apply cargo fmt

* [core] Give me back my blank line

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* BinaryHeap::new()

* Failing FromIterator test

* Dumb push impl

* Dumb peek impl

* Naive push implementation

* Copy in some reference impls for inspiration

* WIP: use storage2::Vec and implement pop

* Fix sift_up

* Fix sift_down

* Test with heap from slice

* Add pass through clear impl

* Add storage trait impls

* Add binary_heap bench, start experimentation

# Conflicts:
#	core/Cargo.toml

* Add tests for push/pull from storage

* Get basic bench working for pushing largest value

* Fmt

* Prevent storage from being cleared in test env

* iter batched

* Make inline setup to test consistency

* Revert to iter_batch tests

* Add populated cache benches

* Fmt

* Factor out bench push

* Refactor benchmark loop on push

* Configure warm-up and measurement times to improve consistency

* Remove redundant test

* Refactor push benches

* Refactor push benches again

* Add Pop benchmark

* Fmt

* Add some comments to the benchmarks

* Remove some todos

* Use iter_batched_ref

* Fix pop benchmark name

* Add test for worst case O(log n) push

* Fmt

* Add push test

* Add peek and pop test

* Fix up sift comments and log tests

* Comments

* Add Reverse wrapper type for min heaps

* Fmt

* Peek mut

* Fmt

* Add empty tests

* Check complexity of pushing smallest value

* Test drop clears cells

* Fix stable build

* Basic property test

* Fix wasm build

* Fmt

* Derive Default, PartialEq, Eq

* Add property test to feature

* Fix doc links

* Fmt

* Remove commented out println

* Avoid potential false positive

* Add punctuation

* Comments

* Fmt

* Move binary_heap to crates

* Make it compile

* Fix up doc test and benches

* Fmt

* Fix license headers

* [examples] Rustify return types

* [examples] Add trait-erc20 Example

* [examples] Improve readability

* [examples] Remove unneeded export

* [examples] Move definitions into module

* [examples] Commentify

* [examples] Improve comment

* [examples] Improve comment

* [examples] Fix typo

* [examples] Add Error::InsufficientAllowance

* [examples] Add Errors section in doc comments

* [examples] Make allowance_of_or_zero and balance_of_or_zero inplace

* [examples] Ensure allowance is only updated if transfer worked

* [examples] Apply cargo fmt

* [examples] Add test which would have catched allowance changing on failed transfer

* [examples] Apply cargo fmt

* [examples] Remove unnecessary assert for ()

* Add 0x prefix if missing

* Fmt

* [*] normalize authors for all ink! crates

* [lang, storage] add extern crate proc_macro

This is somehow needed for cargo publishing.

* [storage/derive] add missing info for publish

* [prelude] cargo publish cannot handle non-default lib.rs paths ...

* [primitives] add path for finding benchmarks

Needed by cargo unleash.

* debug (CI): putting reports in artifacts [skip ci]

* debug (CI): remove unneded jobs, revert lated

* change (doc): fix artifacts

* change (CI): CARGO_HOME goes to branch level to avoid collapses; pre-population for it

* change (CI): small fix to codecov

* change (CI): DRY prepop script

* change (CI): DRY prepop script

* change (CI): docstring for pre-pop cache script

* change (CI): no cache for codecov report

* [chores] add release notes for ink! 3.0

* [releases] 3.0: add note about trait definitions and implementations

* [*] bump all ink! crate versions to 3.0.0-rc1

* [releases] fix elipsis

* [releases] fix typo, improve sentences

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [releases] fix typo, improve sentences

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [releases] fix typo, improve sentences

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [releases] add note to lazy

* [releases] fix typo, improve sentences

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [releases] fix typo, improve sentences

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [releases] fix typo, improve sentences

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [releases] add missing release notes for ink! 2.1

* [releases] fix typo, improve sentences

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [releases] fix typo, improve sentences

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [releases] improve payable docs

* [*] update crate descriptions

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [env] rename Env -> EnvBackend, TypedEnv -> TypedEnvBackend

* [env] rename EnvError -> Error

* [*] rename ink_env::EnvTypes -> Environment

Namely rename:
ink_env::EnvTypes -> Environment
ink_env::DefaultEnvTypes -> DefaultEnvironment

* [*] update cfg-if dependency 0.1 -> 1.0

* [alloc] rename ink_alloc -> ink_allocator

* [env] forgot to rename in lib.rs

* [env, lang] fix some bugs with ink_env::EnvError -> Error renaming

* [ci] adjust renaming of ink_alloc -> ink_allocator

* [env] apply rustfmt

* [lang/macro] re-enable disabled UI test

* [examples] DNS: apply rustfmt

* [examples] ERC-20, ERC-721: apply rustfmt

* [env] remove unnecessary copy of no longer used mod.rs

* [env, lang] make crates compile again under newest Rust nightly

* [env] on-chain: enhance ScopedBuffer

Add append_encoded and take_appended methods.

* [env] remove old Topics trait

* [env] add new Topics infrastructure

* [env] implement new Topics infrastructure for on/off chain environments

* [env] remove dummy event

* [env] make env::topics::state mod externally accessible

It stays hidden in docs.

* [lang/codegen] generate proper Topics impls for ink! events

* [env] apply rustfmt

* [lang/codegen] fix codegen for events without topics

* [lang/macro] fix UI test

* [env] off-chain: clean-up slightly

* [examples] ERC-20: improve tests for event topics

* [env] remove commented-out line

* [lang/codegen] include event signature into topics

This is the same as it is done for non-anonymous Solidity events.
The signature of an ink! event is: ContractName::EventName.
E.g. for ERC-20's Transfer event it is: Erc20::Transfer

* [examples] ERC-20: adjust test for changes with event topics

* [lang/ir] add support for anonymous events

* [lang/codegen] add codegen for anonymous events

* [lang/ir] apply rustfmt

* [lang/macro] comment out failing unit test

Fails due to rustc version mismatch and some recent error display change.

* [examples] apply rustfmt

* Make public fields for InkProject and specs

* Make layout fields public

* Use scale-info from branch

* Add Deserialize derives, use ReadOnlyRegistry

* Deserialize contract metadata specs

* Deserialize layout2 specs

* WIP decode hex

* Use impl_serde crate for hex byte string serde

* Test for selector deserialization

* Fix up custom deserialization

* Export selector and add to_vec impl

* Fmt

* Fix up spec segments IntoCompact

* Make name public

* Update to latest scale-info master

* Replace pub fields with getters

* Replace pub fields with getters in spec

* Fix search replace error with any::TypeId

* Use scale-info 0.4

* Fmt

* Remove commented out getter

* Fix up other scale-info deps

* Clippy

* Fix up message and constructor spec builder method names

* Serialize empty bytes vec without 0x prefix

* [lang] add doc to ink_lang::test proc. macro

* [lang] add doc to ink_lang::trait_definition proc. macro

* [examples] add whitespace to separate trait methods

* [env] make it possible to use a primitive [u8; 32] as hash type

* [lang] add doc-comment to #[ink::contract] proc. macro

* [lang] add additional notes to #[ink::contract] docs

* [lang] document #[ink::contract] selector controlling

* [lang] add documentation for #[ink::contract] event definition and emitting

* [lang] add doc section explaining env interaction via #[ink::contract]

Explains Self::env() and self.env() interations.

* [ci] add doc generation for ink_lang_ir and ink_lang_codegen

* [lang/macro] fix docs

Co-authored-by: Michael Müller <mich@elmueller.net>

* [lang/macro] fix typo

Co-authored-by: Michael Müller <mich@elmueller.net>

* [ink/macro] fix typo

Co-authored-by: Michael Müller <mich@elmueller.net>

* [lang/macro] improve docs

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [lang/macro] fix typo

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [lang/macro] fix typo

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [lang/macro] fix typo

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [env] implement Clear for Hash in terms of Clear for [u8; 32]

* [storage] apply better formatting

* [storage] make clearer that we use DynamicAllocator in test

* [lang/macro] improve docs

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [lang/macro] fix typo

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [lang/macro] add note about payable constructors

* [lang/macro] fix payable messages example

* [lang/macro] add note about disabling dynamic storage allocator

* [lang/macro] improve section about compile_as_dependency

* [lang/macro] clear up EnvTypes SCALE encoding

* [lang/macro] fix docs

* [lang/macro] fix typo

Co-authored-by: Andrew Jones <ascjones@gmail.com>

Co-authored-by: Michael Müller <mich@elmueller.net>
Co-authored-by: Andrew Jones <ascjones@gmail.com>

* [env] remove crate-level re-exports for the hash module

* [env] rename ink_env::println -> debug_println

This makes the usage intent clearer.

* [lang] remove deprecated method

* [lang] hide all definitions that are only needed for codegen purposes

* [lang] remove False, move True

* [lang] remove unnecessary where bounds

* [lang] add EnvAccess forwarding for built-in crypto hashes

* [README] add ink_lang doc link

* [env] fix on-chain compilation

* [lang] apply clippy suggestion

* [*] split ink_core into ink_env and ink_storage

The workspace does not yet compile!

* [env] make compile again

* [env] fix doc tests

* [storage] make crate compile again

* [env] fix some doc comment links

* [README] flipper example: remove unused import

* [storage/derive] fix compilation of generated code

* [README] add ink_storage and ink_env doc links

* [env, primitives, storage] fix docs

* [lang] make compile again

* [lang/codegen] use absolute paths in #[ink::test] proc. macro

* [examples] make compile again

* [*] apply rustfmt

* [env] remove unneeded dependencies

* [storage] remove all unneeded dependencies and crate features

* [*] update outdated dependencies

* [env, lang] remove unused dependencies

* [*] fix comments

* [*] fix some intra doc links

* [ci] adjust to split ink_env and ink_storage crates

* [ci] forgot to handle split ink_env and ink_storage in docs

* [storage] fix fuzz tests

* [examples] apply rustfmt

* [examples] apply rustfmt (ERC-721)