Enum Error 

pub enum Error {
    Trap(Trap),
    AbortOnPanic {
        message: String,
    },
    BadReturnValue {
        actual: Option<ValueType>,
    },
    ReturnedPtrOutOfRange {
        pointer: u32,
        size: u32,
        memory_size: u32,
    },
    UnresolvedFunctionCalled {
        function: String,
        module_name: String,
    },
    ParamDecodeError,
    ParamOutOfRange {
        function: &'static str,
        param_num: usize,
        pointer: u32,
        length: u32,
    },
    Utf8Error {
        function: &'static str,
        param_num: usize,
        error: Utf8Error,
    },
    NoActiveTransaction,
    FinishedWithPendingTransaction,
    OutOfMemory {
        function: &'static str,
        requested_size: u32,
    },
    FreeError {
        pointer: u32,
    },
    StateVersionMismatch {
        parameter: TrieEntryVersion,
        specification: TrieEntryVersion,
    },
    ChildStorageRootTrieDoesntExist,
    BatchVerifyWithoutStarting,
    AlreadyBatchVerify,
    NoBatchVerify,
    HostFunctionNotImplemented {
        function: &'static str,
    },
}

Reason why the Wasm blob isn’t conforming to the runtime environment.

Variants

Trap(Trap)

Error in the Wasm code execution.

AbortOnPanic

Runtime has called the ext_panic_handler_abort_on_panic_version_1 host function.

Fields

message: String

Message generated by the runtime.

BadReturnValue

A non-i64 value has been returned by the Wasm entry point.

Fields

actual: Option<ValueType>

Type that has actually gotten returned. None for “void”.

ReturnedPtrOutOfRange

The pointer and size returned by the Wasm entry point function are invalid.

Fields

pointer: u32

Pointer that got returned.

size: u32

Size that got returned.

memory_size: u32

Size of the virtual memory.

UnresolvedFunctionCalled

Called a function that is unknown to the host.

Note: Can only happen if allow_unresolved_imports was true.

Fields

function: String

Name of the function that was unresolved.

module_name: String

Name of module associated with the unresolved function.

ParamDecodeError

Failed to decode a SCALE-encoded parameter.

ParamOutOfRange

One parameter is expected to point to a buffer, but the pointer is out of range of the memory of the Wasm VM.

Fields

function: &'static str

Name of the function being called where a type mismatch happens.

param_num: usize

Index of the invalid parameter. The first parameter has index 0.

pointer: u32

Pointer passed as parameter.

length: u32

Expected length of the buffer.

Depending on the function, this can either be an implicit length or a length passed as parameter.

Utf8Error

One parameter is expected to point to a UTF-8 string, but the buffer isn’t valid UTF-8.

Fields

function: &'static str

Name of the function being called where a type mismatch happens.

param_num: usize

Index of the invalid parameter. The first parameter has index 0.

error: Utf8Error

Decoding error that happened.

NoActiveTransaction

Called ext_storage_rollback_transaction_version_1 or ext_storage_commit_transaction_version_1 but no transaction was in progress.

FinishedWithPendingTransaction

Execution has finished while a transaction started with ext_storage_start_transaction_version_1 was still in progress.

OutOfMemory

Error when allocating memory for a return type.

Fields

function: &'static str

Name of the function being called.

requested_size: u32

Size of the requested allocation.

FreeError

Called ext_allocator_free_version_1 with an invalid pointer.

Fields

pointer: u32

Pointer that was expected to be freed.

StateVersionMismatch

Mismatch between the state trie version provided as parameter and the state trie version found in the runtime specification.

Fields

parameter: TrieEntryVersion

The version passed as parameter.

specification: TrieEntryVersion

The version in the specification.

ChildStorageRootTrieDoesntExist

Called ext_default_child_storage_root_version_1 or ext_default_child_storage_root_version_2 on a child trie that doesn’t exist.

BatchVerifyWithoutStarting

Runtime has tried to perform a signature batch verification before initiating a batch verification.

AlreadyBatchVerify

Runtime has tried to initiate a batch signatures verification while there was already one in progress.

NoBatchVerify

Runtime has tried to finish a batch signatures verification while none is in progress.

HostFunctionNotImplemented

The host function isn’t implemented.

Fields

function: &'static str

Name of the function being called.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Error

fn fmt(&self, __derive_more_f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.