* WIP

* Add salt argument to instantiate call

* Fix lang compilation

* Fix salt to [u8; 4]

* Make create builder generic over Salt

* Use type state instead of ()

* Rename salt to salt_bytes

* Fmt

* Apply review suggestion: type state enum

* Apply review suggestion: separate impl block for salt_bytes getter

* Apply review suggestion: take salt bytes directly to avoid copy overhead

* Apply review suggestion: use Salt type state instead of leftover concrete type

* Apply review suggestion: fix doc tests

* [lang/ir] generalize conflicting attribute error reporting

# Conflicts:
#	crates/lang/ir/src/ir/chain_extension.rs

* [lang/macro] add UI tests for payable constructors

* fix docs (review suggestion)

Co-authored-by: Michael Müller <michi@parity.io>

* fix docs (review suggestion)

Co-authored-by: Michael Müller <michi@parity.io>

Co-authored-by: Michael Müller <michi@parity.io>

* add new tests for #[ink(namespace = ..)] and #[ink(selector = ..)] attrs

* [lang] implement new errors for ink! attributes: namespace, selector

* add #[ink(extension = N: u32)] attribute

* apply rustfmt

* [lang] add initial implementation of chain extension proc. macro

* [lang] rename AttributeArg -> AttributeFrag

* rename AttributeFrag::kind field to arg

* rename AttributeArgKind -> AttributeArg

Also introduce a new AttributeArgKind type and AttributeArg::kind method.

* [lang] apply rustfmt

* add Display impl for AttributeArgKind

* [lang] use AttributeArgKind in sanitize_attributes and ensure_first methods

* [lang/ir] improve error reporting for duplicate ink! attributes

* [lang/ir] refactoring and improvements to chain extension IR impl

* [lang/ir] add tests for IR implementation of chain extensions

* [lang/ir] remove some code dupe

* [lang/ir] add getters to ChainExtension

* [lang/ir] add re-exports for ChainExtension definitions

* [lang/codegen] add initial impl for ChainExtensions

* [env] add ChainExtension assoc type to the Environment trait

* [lang] initial impl to make it possible to use chain extension syntax

* [env] improvements to chain extensions API

Also removes the unstable crate feature guarding the feature.

* [lang/macro] add UI test for chain extension

* [lang/macro] register new UI test

* [lang/codegen] fix some codegen bugs with new chain extension feature

* [lang, env] apply rustfmt

* [lang/ir] apply clippy suggestions and fix outdated error messages

* [lang/ir] fix some tests and incorrect error messages

* [examples] apply clippy suggestion

* add ErrorCode to ink! chain extension trait

* add FromStatusCode trait to ink_lang

* add #[ink(expect_output)] and #[ink(expect_ok)] attributes

Also add their handling for the #[ink::chain_extension] proc. macro.

* add ink_lang::IsResultType trait

* add ChainExtensionMethodInputs iterator

* hide docs for IsResultType trait

* add some docs to chain extension codegen

* implement expect_ok and expect_output where bounds in codegen

* apply code review suggestions by (cmichi)

* add ReturnCode::into_u32 getter

* change return type of ext::call_chain_extension: RetCode -> u32

Chain extensions do not follow the general scheme of error return code because they have their own set of errors that is custom defined by the author of the chain extension.

* [lang] add ChainExtension trait

Not yet sure we need it.

* change EnvBackend::call_chain_extension signature

The new signature is much more low-level and supports all the different ways to call a chain extension method.
This commit already implements the chain extension call on the on-chain environment.
More work needs to be done to properly support this for the off-chain environment.

* remove old high-level API for calling chain extension methods

* [env] add new high-level module to handle chain extension calls

* rename ChainExtensionMethodInstance -> ChainExtensionMethod

* [env] add doc examples to chain extension method API

* apply rustfmt

* [env] clippy: allow complex type in ChainExtensionMethod type state

* silence some warnings

* re-export IsResultType from ink_lang crate

* [lang] remove FromStatusCode trait

This trait already exists in the ink_env crate.

* [lang] update codegen for chain extensions

Not yet done but close.

* [lang] update simple chain extension test

Compiles now again.

* apply rustfmt

* update some license headers

* [env] fix where bound

* extend chain extension test case to cover all cases

* add messages for read_small, access and unlock_access

* fix some bugs with chain extension method signatures in test

* fix some bugs and docs in chain extension test

* fix test

* update quickcheck to 1.0

* [env] implement chain extension calling for off-chain env

The new interface is much more lower-level and it is still impossible to use chain state from within the chain extension call. The latter must be fixed as soon as the off-chain environment receives its rework.

* apply rustfmt

* add docs to #[ink::chain_extension] proc. macro

* rename env_types -> env everywhere

* make doc examples for #[ink::chain_extension] compile

* add yet another technical limitation

* make link to simple.rs test case more stable (point to revision)

* fix docs (code suggestion)

Co-authored-by: Michael Müller <michi@parity.io>

* fix docs (code suggestion)

Co-authored-by: Michael Müller <michi@parity.io>

* fix docs (code suggestion)

Co-authored-by: Michael Müller <michi@parity.io>

* fix docs (code suggestion)

Co-authored-by: Michael Müller <michi@parity.io>

* add dev. note to Backend::call_chain_extension

* fix docs example (code suggestion)

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

* [env] chain extension: make doc examples/tests compile

* fix some doc comments according to review suggestions

* review suggestion: telling -> meaning

* fix docs (review suggestion)

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

* fix docs (review suggestion)

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

* improve docs (review suggestion)

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

* rename chain extension test file

* analyse_error_code add doc comments for possible errors

* rename expect_ok -> returns_result and expect_output -> handle_status

Some examples and docs might be invalidated or outdated.

* [lang/ir] improve error reporting for ink! namespace attribute with missing parameter

* [lang/*] implement new handle_status and returns_result attributes

* [env] apply rustfmt

Co-authored-by: Michael Müller <michi@parity.io>
Co-authored-by: Andrew Jones <ascjones@gmail.com>

Updates the requirements on [itertools](https://github.com/bluss/rust-itertools) to permit the latest version.
- [Release notes](https://github.com/bluss/rust-itertools/releases)
- [Changelog](https://github.com/rust-itertools/itertools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/bluss/rust-itertools/compare/v0.9.0...v0.10.0

)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Revert me: Remove `rules`

* Fix overwriting existing files

* Revert "Revert me: Remove `rules`"

This reverts commit cb7f6619.

* Fix overwriting existing files

* Revert me: Provoke doc failures

* [ci] Test workspace docs

* Revert "Revert me: Provoke doc failures"

This reverts commit cbc45cf0.

* Fix spaces

* Revert me: Provoke doc failures and see if `exit 1` can be removed

* Revert "Revert me: Provoke doc failures and see if `exit 1` can be removed"

This reverts commit d0e0878e.

* Supply `--all-features` to make artifacts reusable

* Use `RUSTDOCFLAGS=-Dwarnings`

* Revert me: Provoke doc failures

* Revert "Revert me: Provoke doc failures"

This reverts commit e0152681.

* Reuse artifacts of `docs` job for `publish-docs`

* Two spaces

* Two spaces

* Remove `test`, needs already covers this

* Revert me: Test if `publish-docs` job works

* Fix target dir path

* Revert "Revert me: Test if `publish-docs` job works"

This reverts commit 7554b987.

* Revert me: Publish for testing

* Revert "Revert me: Publish for testing"

This reverts commit 3b0ba224.

* CI: nightly tested ci image [skip ci]

* CI: add comment

* [storage] Implement `Drop` for `Pack`

* Implement comments

* Make `new_with_key` non-public

* Remove `new_with_key`

* Ensure topics are unique

* Remove unavailable method

* Fix salt appending in Wasm

* Remove salt param

* Add missing assignment

* Update crates/lang/src/events.rs

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

* Add suggestions

* Remove always inline

* Fix event hashing in examples

* Make nightly clippy happy

* Remove unnecessary return param

* Do not use internal type for hash calculation

* Hide internal type from docs

* Expose `PrefixedValue` from ink_env::topics

* Apply cargo fmt

* Apply cargo fmt

* Apply comments

* Apply comments

* Apply comments

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

* Remove dead impls

* Remove dead code from test (subtract not implemented for Key)

* Make nightly clippy happy

* Update to new cargo-contract cli commands

* Fail `build-all` if one of the individual builds fails

* Improve text

* Remove mentions of new .contract file

* Revert "Remove mentions of new .contract file"

This reverts commit a3c959ac.

* Improve readme text

* Make `Lazy::Drop` always clear up all its storage

* Fix typo: yet ➜ get

* Fix macro import

* Make tests off-chain since they interact with storage now due to Drop

* Make use of `REQUIRES_DEEP_CLEAN_UP`

* Clear up all footprint cells

* Fix typo: yet ➜ get

* Fix case

* Macro ➜ fn

* Migrate magic number to global const

* Replace format!

* Make nightly clippy happy

* Remove unnecessary return param

* Apply comments

* Update crates/storage/src/lazy/lazy_cell.rs

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

* Fix binding

* Add binding

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

* Fix naming

* Make logo visible in dark mode

* Close div correctly

* Add glow version of logo

* Tune height

* Bring centering back

* Revert "Bring centering back"

This reverts commit ab05c59b.

* Revert "Close div correctly"

This reverts commit 38a79257.

* Fix typo

* Fn does not need to take mutable self

* Fix naming: #[ink(implemenetation)] ➜ #[ink(impl)]

* #[ink(storage)] can not be applied to enum

* Fix typo: accesses ➜ accessed

* Fix typo: sturctures ➜ structures

* Fix typo: invariances ➜ invariants

* Fix comment

* Reduce code duplication in HashMap tests

* Add test api getters for used storage

* Add regression tests for complete storage clearance of nested Lazy's

* Always clear inner cell

* Bring costs of bug fix down

* Apply suggestions from code review

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

* Rename function

* Throw out convenience method, clarify variable names

* Clarify comment

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

* Use `cargo-contract` from container

* Remove generate-metadata command

* Simplify regression test

* Add asserts for Some/None

* Add assertions for expected ptr

* Introduce second regression test

* Introduce second regression test

* Fix syntax

* [ci] Check format of UI tests as well

* [lang] Apply our formatting guidelines to UI tests

* [ci] Make Gitlab happy

* [ci] Remove superfluous space

* [ci] Output rustfmt version

* [ci] Tune rustfmt params

* Remove todo's

* Migrate erc721 ui test contract to recent example contract

* Remove --version command used to debug

* Apply cargo fmt

* .gitlab-ci.yml formatting

* Add main fn

* Remove todo from stderr expect

* Adapt fixtures

* Revert "Adapt fixtures"

This reverts commit 174c012e.

* Adapt fixtures

* Advance ptr, even when 'None'

* Revert me: Add minimal contract which reproduces bug

* Fix typo: explicitely ➜ explicitly

* Add regression test

* Improve structure

* Revert "Revert me: Add minimal contract which reproduces bug"

This reverts commit 69cd40e2.

* Fix clippy error 'result_unit_err'

* Fix clippy error 'result_unit_err'

* Fix typo: sucesful ➜ successful

* Improve comment

* Remove no-op

* Remove type aliases for V1/V2

* fix: changed links to chats

* fix: changed links to chats

* Use variables

* Update README.md

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

* [storage] Remove iter_mut() for BinaryHeap

* [storage] Remove unused import

* Switch to discord badge with number of users in it

* Make matrix badge consistent with discord badge

* [lang] Improve invalid selector message

* [lang] Improve span

* [lang] Return syn::Error instead of panicking

* Make clippy happy

* [lang] Reduce code dup with non_hex_err

* [lang] Rename fn

* [lang] Fix err functions

* [lang] Add comments

* [lang] Remove unnecessary lifetime

* Fix typo: anonmyous ➜ anonymous

* Readme makeover

* Improve titles

* Migrate to table

* Remove default() impl

* Remove default() impl

* Fix id

* Update table

* Update title

* Shorten example instructions

* Link examples

* Link to lines

* Link to lines

* Link to lines

* [chores] implicitely ➜ implicitly

* [examples] Add demonstration of how to mock transferred_balance

* [lang] Fix clippy 'needless_lifetimes'

Error was:

explicit lifetimes given in parameter types where they could
be elided (or replaced with `'_` if needed by type declaration)

* [lang] Apply cargo fmt

* [examples] Fix param

* [chores] Fix typo: invokation ➜ invocation

* [chores] Fix typo: timstamp ➜ timestamp

* [chores] Fix typo: ininitialized ➜ initialized

* [env] Implement terminate_contract in off-chain env

* [examples] Add lock-until

* [env] Implement proper off-chain testing for ext_terminate

* Apply suggestions from code review

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

* [env] Fix Environment type

* [env] Derive Balance/AccountId from Environment

* [env] Fix types in macro

* [examples] Remove lock-until

* [examples] Add contract-terminate

* [examples] Add contract-transfer

* [examples] Make clippy happy

* [examples] Fix example name

* [examples] Remove Default impls

* [examples] Move macro to contract-terminate/test_utils

* [env] Migrate macro to fn which gets Environment type param

* [env] Add explanatory dev comment

* [examples] Allow clippy::new_without_default

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

* Execute fuzz stage on this branch, remove variable

* Move fuzz to first stage

* Fix ALL_CRATES

* Undo debugging changes

* Reduce number of tests for debugging

* Debug further

* Debug further

* Debug further

* Debug further

* Improve curl

* Fix markdown

* Exit 1 after fuzz tests failed

* Revert debugging changes

* Improve readability