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use alloc::{fmt, vec::Vec};
use core::convert::{TryFrom, TryInto};
use failure::Fail;
use crate::{
bytesrepr::{self, FromBytes, ToBytes, U8_SERIALIZED_LENGTH},
AccessRights, CLType, CLTyped,
};
#[derive(Fail, Debug, Copy, Clone, PartialEq, Eq)]
#[repr(u8)]
pub enum Error {
#[fail(display = "Insufficient funds")]
InsufficientFunds = 0,
#[fail(display = "Source not found")]
SourceNotFound = 1,
#[fail(display = "Destination not found")]
DestNotFound = 2,
#[fail(display = "Invalid URef")]
InvalidURef = 3,
#[fail(display = "Invalid AccessRights")]
InvalidAccessRights = 4,
#[fail(display = "Invalid non-empty purse creation")]
InvalidNonEmptyPurseCreation = 5,
#[fail(display = "Storage error")]
Storage = 6,
#[fail(display = "Purse not found")]
PurseNotFound = 7,
}
impl From<PurseError> for Error {
fn from(purse_error: PurseError) -> Error {
match purse_error {
PurseError::InvalidURef => Error::InvalidURef,
PurseError::InvalidAccessRights(_) => {
Error::InvalidAccessRights
}
}
}
}
impl CLTyped for Error {
fn cl_type() -> CLType {
CLType::U8
}
}
#[doc(hidden)]
pub struct TryFromU8ForError(());
#[doc(hidden)]
impl TryFrom<u8> for Error {
type Error = TryFromU8ForError;
fn try_from(value: u8) -> Result<Self, Self::Error> {
match value {
d if d == Error::InsufficientFunds as u8 => Ok(Error::InsufficientFunds),
d if d == Error::SourceNotFound as u8 => Ok(Error::SourceNotFound),
d if d == Error::DestNotFound as u8 => Ok(Error::DestNotFound),
d if d == Error::InvalidURef as u8 => Ok(Error::InvalidURef),
d if d == Error::InvalidAccessRights as u8 => Ok(Error::InvalidAccessRights),
d if d == Error::InvalidNonEmptyPurseCreation as u8 => {
Ok(Error::InvalidNonEmptyPurseCreation)
}
_ => Err(TryFromU8ForError(())),
}
}
}
impl ToBytes for Error {
fn to_bytes(&self) -> Result<Vec<u8>, bytesrepr::Error> {
let value = *self as u8;
value.to_bytes()
}
fn serialized_length(&self) -> usize {
U8_SERIALIZED_LENGTH
}
}
impl FromBytes for Error {
fn from_bytes(bytes: &[u8]) -> Result<(Self, &[u8]), bytesrepr::Error> {
let (value, rem): (u8, _) = FromBytes::from_bytes(bytes)?;
let error: Error = value
.try_into()
.map_err(|_| bytesrepr::Error::Formatting)?;
Ok((error, rem))
}
}
#[derive(Debug, Copy, Clone)]
pub enum PurseError {
InvalidURef,
InvalidAccessRights(Option<AccessRights>),
}
impl fmt::Display for PurseError {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match self {
PurseError::InvalidURef => write!(f, "invalid uref"),
PurseError::InvalidAccessRights(maybe_access_rights) => {
write!(f, "invalid access rights: {:?}", maybe_access_rights)
}
}
}
}