Enumeratable accounts (#195)

* Merge remote-tracking branch 'origin/master' into gav-xts-dont-panic

* Update wasm.

* consensus, session and staking all panic-safe.

* Democracy doesn't panic in apply.

* Fix tests.

* Extra helper macro, council depanicked.

* Fix one test.

* Fix up all council tests. No panics!

* Council voting depanicked.

* Dispatch returns result.

* session & staking tests updated

* Fix democracy tests.

* Fix council tests.

* Fix up polkadot parachains in runtime

* Fix borked merge

* More Slicable support

Support general `Option` and array types.

* Basic storage types.

* Existential deposit for contract creation

* Basic implemnetation along with removals

* Fix tests.

* externalities builder fix.

* Tests.

* Fix up the runtime.

* Fix tests.

* Add generic `Address` type.

* Initial function integration of Address into Extrinsic.

* Fix build

* All tests compile.

* Fix (some) tests.

* Fix signing.

* Push error.

* transfer can accept Address

* Make Address generic over AccountIndex

* Fix test

* Make Council use Address for dispatch.

* Fix build

* Bend over backwards to support braindead derive.

* Repot some files.

* Fix tests.

* Fix grumbles

* Remove Default bound

* Fix build for new nightly.

* Make `apply_extrinsic` never panic, return useful Result.

* More merge hell

* Doesn't build, but might do soon

* Serde woes

* get substrate-runtime-staking compiling

* Polkadot builds again!

* Fix all build.

* Fix tests & binaries.

* Reserve some extra initial byte values of address for future format changes

* Make semantic of `ReservedBalance` clear.

* Fix panic handler.

* Integrate other balance transformations into the new model

Fix up staking tests.

* Fix runtime tests.

* Fix panic build.

* Tests for demonstrating interaction between balance types.

* Repot some runtime code

* Fix checkedblock in non-std builds

* Get rid of `DoLookup` phantom.

* Attempt to make transaction_pool work with lookups.

* Remove vscode settings

* New attempt at making transaction pool work.

* It builds again!

* --all builds

* Fix tests.

* New build.

* Test account nonce reset.

* polkadot transaction pool tests/framework.

* Address grumbles.

* Revert bad `map_or`

* Rebuild binaries, workaround.

* Avoid casting to usize early.

* reenable sync tests

substrate/demo/runtime/src/lib.rs

@@ -46,13 +46,16 @@ extern crate substrate_runtime_timestamp as timestamp;
 extern crate demo_primitives;
 
 use rstd::prelude::*;
-use demo_primitives::{AccountId, Balance, BlockNumber, Hash, Index, SessionKey, Signature};
+use demo_primitives::{AccountId, AccountIndex, Balance, BlockNumber, Hash, Index, SessionKey, Signature};
 use runtime_primitives::generic;
 use runtime_primitives::traits::{Convert, HasPublicAux, BlakeTwo256};
 
 #[cfg(any(feature = "std", test))]
 pub use runtime_primitives::BuildExternalities;
 
+// Workaround for https://github.com/rust-lang/rust/issues/26925 . Remove when sorted.
+#[derive(Clone, Copy, PartialEq, Eq)]
+#[cfg_attr(feature = "std", derive(Debug, Serialize, Deserialize))]
 /// Concrete runtime type used to parameterize the various modules.
 pub struct Concrete;
 
@@ -108,6 +111,7 @@ pub type Session = session::Module<Concrete>;
 impl staking::Trait for Concrete {
 	type Balance = Balance;
 	type DetermineContractAddress = BlakeTwo256;
+	type AccountIndex = AccountIndex;
 }
 
 /// Staking module for this concrete runtime.
@@ -152,16 +156,20 @@ impl_outer_dispatch! {
 	}
 }
 
+/// The address format for describing accounts.
+pub type Address = staking::Address<Concrete>;
 /// Block header type as expected by this runtime.
 pub type Header = generic::Header<BlockNumber, BlakeTwo256, Vec<u8>>;
 /// Block type as expected by this runtime.
 pub type Block = generic::Block<Header, UncheckedExtrinsic>;
 /// Unchecked extrinsic type as expected by this runtime.
-pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<AccountId, Index, Call, Signature>;
-/// Extrinsic type as expected by this runtime.
-pub type Extrinsic = generic::Extrinsic<AccountId, Index, Call>;
+pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Index, Call, Signature>;
+/// Extrinsic type as expected by this runtime. This is not the type that is signed.
+pub type Extrinsic = generic::Extrinsic<Address, Index, Call>;
+/// Extrinsic type that is signed.
+pub type BareExtrinsic = generic::Extrinsic<AccountId, Index, Call>;
 /// Executive: handles dispatch to the various modules.
-pub type Executive = executive::Executive<Concrete, Block, Staking,
+pub type Executive = executive::Executive<Concrete, Block, Staking, Staking,
 	(((((), Council), Democracy), Staking), Session)>;
 
 impl_outer_config! {

substrate/demo/runtime/wasm/Cargo.lock

@@ -543,6 +543,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "substrate-codec"
 version = "0.1.0"
+dependencies = [
+ "arrayvec 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "substrate-keyring"
@@ -647,6 +650,7 @@ version = "0.1.0"
 dependencies = [
  "hex-literal 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.64 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.64 (registry+https://github.com/rust-lang/crates.io-index)",
  "substrate-codec 0.1.0",
  "substrate-runtime-io 0.1.0",
  "substrate-runtime-primitives 0.1.0",
@@ -767,6 +771,7 @@ dependencies = [
  "hex-literal 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "safe-mix 0.1.0",
  "serde 1.0.64 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.64 (registry+https://github.com/rust-lang/crates.io-index)",
  "substrate-codec 0.1.0",
  "substrate-primitives 0.1.0",
  "substrate-runtime-io 0.1.0",