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error rework, for polkadot convenience (#7446)

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Co-authored-by: Bernhard Schuster <bernhard@parity.io>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
This commit is contained in:
Bernhard Schuster
2020-10-28 15:04:56 +01:00
committed by GitHub
parent 1679919830
commit 9687759774
17 changed files with 152 additions and 128 deletions
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substrate/primitives/state-machine/src/error.rs
+7 -6
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@@ -22,9 +22,9 @@ use sp_std::fmt;
/// State Machine Error bound.
///
/// This should reflect Wasm error type bound for future compatibility.
pub trait Error: 'static + fmt::Debug + fmt::Display + Send {}
pub trait Error: 'static + fmt::Debug + fmt::Display + Send + Sync {}
impl<T: 'static + fmt::Debug + fmt::Display + Send> Error for T {}
impl<T: 'static + fmt::Debug + fmt::Display + Send + Sync> Error for T {}
/// Externalities Error.
///
@@ -32,17 +32,18 @@ impl<T: 'static + fmt::Debug + fmt::Display + Send> Error for T {}
/// would not be executed unless externalities were available. This is included for completeness,
/// and as a transition away from the pre-existing framework.
#[derive(Debug, Eq, PartialEq)]
#[cfg_attr(feature = "std", derive(thiserror::Error))]
pub enum ExecutionError {
/// Backend error.
#[cfg_attr(feature = "std", error("Backend error {0:?}"))]
Backend(crate::DefaultError),
/// The entry `:code` doesn't exist in storage so there's no way we can execute anything.
#[cfg_attr(feature = "std", error("`:code` entry does not exist in storage"))]
CodeEntryDoesNotExist,
/// Backend is incompatible with execution proof generation process.
#[cfg_attr(feature = "std", error("Unable to generate proof"))]
UnableToGenerateProof,
/// Invalid execution proof.
#[cfg_attr(feature = "std", error("Invalid execution proof"))]
InvalidProof,
}
impl fmt::Display for ExecutionError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "Externalities Error") }
}