* Make `decl_error!` errors usable
This pr implements support for returning errors of different pallets in
a pallet. These errors need to be declared with `decl_error!`.
The pr changes the following:
- Each dispatchable function now returns a `DispatchResult` which is an
alias for `Result<(), DispatchError>`.
- `DispatchError` is an enum that has 4 variants:
- `Other`: For storing string error messages
- `CannotLookup`: Variant that is returned when something returns a
`sp_runtime::LookupError`
- `BadOrigin`: Variant that is returned for any kind of bad origin
- `Module`: The error of a specific module. Contains the `index`,
`error` and the `message`. The index is the index of the module in
`construct_runtime!`. `error` is the index of the error in the error
enum declared by `decl_error!`. `message` is the message to the error
variant (this will not be encoded).
- `construct_runtime!` now creates a new struct `ModuleToIndex`. This
struct implements the trait `ModuleToIndex`.
- `frame_system::Trait` has a new associated type: `ModuleToIndex` that
expects the `ModuleToIndex` generated by `construct_runtime!`.
- All error strings returned in any module are being converted now to `DispatchError`.
- `BadOrigin` is the default error returned by any type that implements `EnsureOrigin`.
* Fix frame system benchmarks
* clean up cargo.toml syntax
* bumping versions to 2.0
* bump networking to 0.8
* move consensus down to 0.8
* bump consensus pallets to 0.8.0, too
* Upping babe and aura pallets
* add remaining, missing version definitions
* missed some
* In progress, runtime io must switch to future proof root +
child_specific (unique id) + u32 type.
* Switch interface, sr-io seems ok, rpc could use similar interface to
sr-io, genesis json broken if there is child trie in existing encoding
genesis.
* test from previous implementation.
* fix proving test.
* Restore Keyspacedb from other branch, only apply to child trie.
* Removing unneeded child_info from child root (child info are stored
if things changed, otherwhise the root does not change).
* Switch rpc to use same format as ext: more future proof.
* use root from child info for trie backend essence.
* Breaking long lines.
* Update doc and clean pr a bit.
* fix error type
* Restore removed doc on merge and update sr-io doc.
* Switch child storage api to use directly unique id, if managed id
where to be put in place, the api will change at this time.
* Clean deprecated host interface from child.
* Removing assertion on child info (can fail depending on root
memoization).
* merging child info in the overlay when possible.
* child iteration by prefix using child_info.
* Using ChainInfo in frame support. ChainInfo gets redesign to avoid
buffers allocation on every calls.
* Add length of root to the data of child info.
* comments
* Encode compact.
* Remove child info with root.
* Fix try_update condition.
* Comment Ext child root caching.
* Replace tuples by struct with field
* remove StorageTuple alias.
* Fix doc tests, and remove StorageOverlay and ChildStorageOverlay
aliases.
Weiliang Li