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Add arithmetic dispatch errors. (#8726)

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* Add arithmetic dispatch errors.

* Replace custom overflow errors.

* Replace custom underflow and division by zero errors.

* Replace overflow/underflow in token error.

* Add token and arithmetic errors in dispatch error equality test.

* Trigger CI.
This commit is contained in:
Shaun Wang
2021-05-10 20:14:02 +12:00
committed by GitHub
parent 655ebc95fb
commit 2a38b23062
12 changed files with 88 additions and 60 deletions
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substrate/frame/balances/src/lib.rs
+6 -8
View File
@@ -171,7 +171,7 @@ use frame_support::{
#[cfg(feature = "std")]
use frame_support::traits::GenesisBuild;
use sp_runtime::{
RuntimeDebug, DispatchResult, DispatchError,
RuntimeDebug, DispatchResult, DispatchError, ArithmeticError,
traits::{
Zero, AtLeast32BitUnsigned, StaticLookup, CheckedAdd, CheckedSub,
MaybeSerializeDeserialize, Saturating, Bounded, StoredMapError,
@@ -402,8 +402,6 @@ pub mod pallet {
VestingBalance,
/// Account liquidity restrictions prevent withdrawal
LiquidityRestrictions,
/// Got an overflow after adding
Overflow,
/// Balance too low to send value
InsufficientBalance,
/// Value too low to create account due to existential deposit
@@ -909,10 +907,10 @@ impl<T: Config<I>, I: 'static> Pallet<T, I> {
match status {
Status::Free => to_account.free = to_account.free
.checked_add(&actual)
.ok_or(Error::<T, I>::Overflow)?,
.ok_or(ArithmeticError::Overflow)?,
Status::Reserved => to_account.reserved = to_account.reserved
.checked_add(&actual)
.ok_or(Error::<T, I>::Overflow)?,
.ok_or(ArithmeticError::Overflow)?,
}
from_account.reserved -= actual;
Ok(actual)
@@ -1332,7 +1330,7 @@ impl<T: Config<I>, I: 'static> Currency<T::AccountId> for Pallet<T, I> where
// NOTE: total stake being stored in the same type means that this could never overflow
// but better to be safe than sorry.
to_account.free = to_account.free.checked_add(&value).ok_or(Error::<T, I>::Overflow)?;
to_account.free = to_account.free.checked_add(&value).ok_or(ArithmeticError::Overflow)?;
let ed = T::ExistentialDeposit::get();
ensure!(to_account.total() >= ed, Error::<T, I>::ExistentialDeposit);
@@ -1431,7 +1429,7 @@ impl<T: Config<I>, I: 'static> Currency<T::AccountId> for Pallet<T, I> where
Self::try_mutate_account(who, |account, is_new| -> Result<Self::PositiveImbalance, DispatchError> {
ensure!(!is_new, Error::<T, I>::DeadAccount);
account.free = account.free.checked_add(&value).ok_or(Error::<T, I>::Overflow)?;
account.free = account.free.checked_add(&value).ok_or(ArithmeticError::Overflow)?;
Ok(PositiveImbalance::new(value))
})
}
@@ -1554,7 +1552,7 @@ impl<T: Config<I>, I: 'static> ReservableCurrency<T::AccountId> for Pallet<T, I>
Self::try_mutate_account(who, |account, _| -> DispatchResult {
account.free = account.free.checked_sub(&value).ok_or(Error::<T, I>::InsufficientBalance)?;
account.reserved = account.reserved.checked_add(&value).ok_or(Error::<T, I>::Overflow)?;
account.reserved = account.reserved.checked_add(&value).ok_or(ArithmeticError::Overflow)?;
Self::ensure_can_withdraw(&who, value.clone(), WithdrawReasons::RESERVE, account.free)
})?;