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Bastian Köcher
8e393aa5a8
* 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
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