owasm 0.1.10

TODO
Documentation 
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#[repr(i32)]
#[derive(Debug, PartialEq, Clone)]
// An enum representing all kinds of errors we have in the system, with 0 for no error.
pub enum Error {
    NoError = 0,
    SpanTooSmallError = 1, // Span to write is too small.
    // Rust-generated errors during compilation.
    ValidationError = 2,           // Wasm code does not pass basic validation.
    DeserializationError = 3,      // Fail to deserialize Wasm into Partity-wasm module.
    SerializationError = 4,        // Fail to serialize Parity-wasm module into Wasm.
    InvalidImportsError = 5,       // Wasm code contains invalid import symbols.
    InvalidExportsError = 6,       // Wasm code contains invalid export symbols.
    BadMemorySectionError = 7,     // Wasm code contains bad memory sections.
    GasCounterInjectionError = 8,  // Fail to inject gas counter into Wasm code.
    StackHeightInjectionError = 9, // Fail to inject stack height limit into Wasm code.
    // Rust-generated errors during runtime.
    InstantiationError = 10, // Error while instantiating Wasm with resolvers.
    RuntimeError = 11,       // Runtime error while executing the Wasm script.
    OutOfGasError = 12,      // Out-of-gas while executing the Wasm script.
    BadEntrySignatureError = 13, // Bad execution entry point sigature.
    MemoryOutOfBoundError = 14, // Out-of-bound memory access while executing the wasm script
    // Host-generated errors while interacting with OEI.
    WrongPeriodActionError = 128, // OEI action to invoke is not available.
    TooManyExternalDataError = 129, // Too many external data requests.
    DuplicateExternalIDError = 130, // Wasm code asks data with duplicate external id.
    BadValidatorIndexError = 131, // Bad validator index parameter.
    BadExternalIDError = 132,     // Bad external ID parameter.
    UnavailableExternalDataError = 133, // External data is not available.
    RepeatSetReturnDataError = 134, // Set return data is called more than once.
    // Unexpected error
    UnknownError = 255,
}