use alloc::{boxed::Box, vec::Vec};
use core::{
convert::TryFrom,
fmt::{Debug, Display, Formatter},
};
use failure::Fail;
use crate::{
bytesrepr::{Error, FromBytes, ToBytes, U8_SERIALIZED_LENGTH},
CLType, CLTyped,
};
#[doc(hidden)]
#[derive(Debug, Eq, PartialEq)]
pub struct TryFromIntError(());
#[derive(Debug)]
pub struct TryFromSliceForAccountHashError(());
#[repr(u32)]
pub enum ActionType {
Deployment = 0,
KeyManagement = 1,
}
#[doc(hidden)]
impl TryFrom<u32> for ActionType {
type Error = TryFromIntError;
fn try_from(value: u32) -> Result<Self, Self::Error> {
match value {
d if d == ActionType::Deployment as u32 => Ok(ActionType::Deployment),
d if d == ActionType::KeyManagement as u32 => Ok(ActionType::KeyManagement),
_ => Err(TryFromIntError(())),
}
}
}
#[repr(i32)]
#[derive(Debug, Fail, PartialEq, Eq, Copy, Clone)]
pub enum SetThresholdFailure {
#[fail(display = "New threshold should be greater than or equal to deployment threshold")]
KeyManagementThreshold = 1,
#[fail(display = "New threshold should be lower than or equal to key management threshold")]
DeploymentThreshold = 2,
#[fail(display = "Unable to set action threshold due to insufficient permissions")]
PermissionDeniedError = 3,
#[fail(
display = "New threshold should be lower or equal than total weight of associated keys"
)]
InsufficientTotalWeight = 4,
}
#[doc(hidden)]
impl TryFrom<i32> for SetThresholdFailure {
type Error = TryFromIntError;
fn try_from(value: i32) -> Result<Self, Self::Error> {
match value {
d if d == SetThresholdFailure::KeyManagementThreshold as i32 => {
Ok(SetThresholdFailure::KeyManagementThreshold)
}
d if d == SetThresholdFailure::DeploymentThreshold as i32 => {
Ok(SetThresholdFailure::DeploymentThreshold)
}
d if d == SetThresholdFailure::PermissionDeniedError as i32 => {
Ok(SetThresholdFailure::PermissionDeniedError)
}
d if d == SetThresholdFailure::InsufficientTotalWeight as i32 => {
Ok(SetThresholdFailure::InsufficientTotalWeight)
}
_ => Err(TryFromIntError(())),
}
}
}
pub const MAX_ASSOCIATED_KEYS: usize = 10;
pub const WEIGHT_SERIALIZED_LENGTH: usize = U8_SERIALIZED_LENGTH;
#[derive(PartialOrd, Ord, PartialEq, Eq, Clone, Copy, Debug)]
pub struct Weight(u8);
impl Weight {
pub fn new(weight: u8) -> Weight {
Weight(weight)
}
pub fn value(self) -> u8 {
self.0
}
}
impl ToBytes for Weight {
fn to_bytes(&self) -> Result<Vec<u8>, Error> {
self.0.to_bytes()
}
fn serialized_length(&self) -> usize {
WEIGHT_SERIALIZED_LENGTH
}
}
impl FromBytes for Weight {
fn from_bytes(bytes: &[u8]) -> Result<(Self, &[u8]), Error> {
let (byte, rem) = u8::from_bytes(bytes)?;
Ok((Weight::new(byte), rem))
}
}
impl CLTyped for Weight {
fn cl_type() -> CLType {
CLType::U8
}
}
pub const ACCOUNT_HASH_LENGTH: usize = 32;
pub const ACCOUNT_HASH_SERIALIZED_LENGTH: usize = 32;
pub type AccountHashBytes = [u8; ACCOUNT_HASH_LENGTH];
#[derive(PartialOrd, Ord, PartialEq, Eq, Hash, Clone, Copy)]
pub struct AccountHash(AccountHashBytes);
impl AccountHash {
pub const fn new(value: AccountHashBytes) -> AccountHash {
AccountHash(value)
}
pub fn value(&self) -> AccountHashBytes {
self.0
}
pub fn as_bytes(&self) -> &[u8] {
&self.0
}
}
impl TryFrom<&[u8]> for AccountHash {
type Error = TryFromSliceForAccountHashError;
fn try_from(bytes: &[u8]) -> Result<Self, TryFromSliceForAccountHashError> {
AccountHashBytes::try_from(bytes)
.map(AccountHash::new)
.map_err(|_| TryFromSliceForAccountHashError(()))
}
}
impl TryFrom<&alloc::vec::Vec<u8>> for AccountHash {
type Error = TryFromSliceForAccountHashError;
fn try_from(bytes: &Vec<u8>) -> Result<Self, Self::Error> {
AccountHashBytes::try_from(bytes as &[u8])
.map(AccountHash::new)
.map_err(|_| TryFromSliceForAccountHashError(()))
}
}
impl Display for AccountHash {
fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
write!(f, "{}", base16::encode_lower(&self.0))
}
}
impl Debug for AccountHash {
fn fmt(&self, f: &mut Formatter) -> core::fmt::Result {
write!(f, "AccountHash({})", base16::encode_lower(&self.0))
}
}
impl CLTyped for AccountHash {
fn cl_type() -> CLType {
CLType::FixedList(Box::new(CLType::U8), 32)
}
}
impl ToBytes for AccountHash {
fn to_bytes(&self) -> Result<Vec<u8>, Error> {
self.0.to_bytes()
}
fn serialized_length(&self) -> usize {
ACCOUNT_HASH_SERIALIZED_LENGTH
}
}
impl FromBytes for AccountHash {
fn from_bytes(bytes: &[u8]) -> Result<(Self, &[u8]), Error> {
let (bytes, rem) = <[u8; 32]>::from_bytes(bytes)?;
Ok((AccountHash::new(bytes), rem))
}
}
#[derive(PartialEq, Eq, Fail, Debug, Copy, Clone)]
#[repr(i32)]
pub enum AddKeyFailure {
#[fail(display = "Unable to add new associated key because maximum amount of keys is reached")]
MaxKeysLimit = 1,
#[fail(display = "Unable to add new associated key because given key already exists")]
DuplicateKey = 2,
#[fail(display = "Unable to add new associated key due to insufficient permissions")]
PermissionDenied = 3,
}
#[doc(hidden)]
impl TryFrom<i32> for AddKeyFailure {
type Error = TryFromIntError;
fn try_from(value: i32) -> Result<Self, Self::Error> {
match value {
d if d == AddKeyFailure::MaxKeysLimit as i32 => Ok(AddKeyFailure::MaxKeysLimit),
d if d == AddKeyFailure::DuplicateKey as i32 => Ok(AddKeyFailure::DuplicateKey),
d if d == AddKeyFailure::PermissionDenied as i32 => Ok(AddKeyFailure::PermissionDenied),
_ => Err(TryFromIntError(())),
}
}
}
#[derive(Fail, Debug, Eq, PartialEq, Copy, Clone)]
#[repr(i32)]
pub enum RemoveKeyFailure {
#[fail(display = "Unable to remove a key that does not exist")]
MissingKey = 1,
#[fail(display = "Unable to remove associated key due to insufficient permissions")]
PermissionDenied = 2,
#[fail(display = "Unable to remove a key which would violate action threshold constraints")]
ThresholdViolation = 3,
}
#[doc(hidden)]
impl TryFrom<i32> for RemoveKeyFailure {
type Error = TryFromIntError;
fn try_from(value: i32) -> Result<Self, Self::Error> {
match value {
d if d == RemoveKeyFailure::MissingKey as i32 => Ok(RemoveKeyFailure::MissingKey),
d if d == RemoveKeyFailure::PermissionDenied as i32 => {
Ok(RemoveKeyFailure::PermissionDenied)
}
d if d == RemoveKeyFailure::ThresholdViolation as i32 => {
Ok(RemoveKeyFailure::ThresholdViolation)
}
_ => Err(TryFromIntError(())),
}
}
}
#[derive(PartialEq, Eq, Fail, Debug, Copy, Clone)]
#[repr(i32)]
pub enum UpdateKeyFailure {
#[fail(display = "Unable to update the value under an associated key that does not exist")]
MissingKey = 1,
#[fail(display = "Unable to update associated key due to insufficient permissions")]
PermissionDenied = 2,
#[fail(display = "Unable to update weight that would fall below any of action thresholds")]
ThresholdViolation = 3,
}
#[doc(hidden)]
impl TryFrom<i32> for UpdateKeyFailure {
type Error = TryFromIntError;
fn try_from(value: i32) -> Result<Self, Self::Error> {
match value {
d if d == UpdateKeyFailure::MissingKey as i32 => Ok(UpdateKeyFailure::MissingKey),
d if d == UpdateKeyFailure::PermissionDenied as i32 => {
Ok(UpdateKeyFailure::PermissionDenied)
}
d if d == UpdateKeyFailure::ThresholdViolation as i32 => {
Ok(UpdateKeyFailure::ThresholdViolation)
}
_ => Err(TryFromIntError(())),
}
}
}
#[cfg(test)]
mod tests {
use std::{convert::TryFrom, vec::Vec};
use super::*;
#[test]
fn account_hash_from_slice() {
let bytes: Vec<u8> = (0..32).collect();
let account_hash = AccountHash::try_from(&bytes[..]).expect("should create account hash");
assert_eq!(&bytes, &account_hash.as_bytes());
}
#[test]
fn account_hash_from_slice_too_small() {
let _account_hash =
AccountHash::try_from(&[0u8; 31][..]).expect_err("should not create account hash");
}
#[test]
fn account_hash_from_slice_too_big() {
let _account_hash =
AccountHash::try_from(&[0u8; 33][..]).expect_err("should not create account hash");
}
#[test]
fn try_from_i32_for_set_threshold_failure() {
let max_valid_value_for_variant = SetThresholdFailure::InsufficientTotalWeight as i32;
assert_eq!(
Err(TryFromIntError(())),
SetThresholdFailure::try_from(max_valid_value_for_variant + 1),
"Did you forget to update `SetThresholdFailure::try_from` for a new variant of \
`SetThresholdFailure`, or `max_valid_value_for_variant` in this test?"
);
}
#[test]
fn try_from_i32_for_add_key_failure() {
let max_valid_value_for_variant = AddKeyFailure::PermissionDenied as i32;
assert_eq!(
Err(TryFromIntError(())),
AddKeyFailure::try_from(max_valid_value_for_variant + 1),
"Did you forget to update `AddKeyFailure::try_from` for a new variant of \
`AddKeyFailure`, or `max_valid_value_for_variant` in this test?"
);
}
#[test]
fn try_from_i32_for_remove_key_failure() {
let max_valid_value_for_variant = RemoveKeyFailure::ThresholdViolation as i32;
assert_eq!(
Err(TryFromIntError(())),
RemoveKeyFailure::try_from(max_valid_value_for_variant + 1),
"Did you forget to update `RemoveKeyFailure::try_from` for a new variant of \
`RemoveKeyFailure`, or `max_valid_value_for_variant` in this test?"
);
}
#[test]
fn try_from_i32_for_update_key_failure() {
let max_valid_value_for_variant = UpdateKeyFailure::ThresholdViolation as i32;
assert_eq!(
Err(TryFromIntError(())),
UpdateKeyFailure::try_from(max_valid_value_for_variant + 1),
"Did you forget to update `UpdateKeyFailure::try_from` for a new variant of \
`UpdateKeyFailure`, or `max_valid_value_for_variant` in this test?"
);
}
}