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Fix fungible unbalanced trait (#12569)

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* Fix fungible unbalanced trait

* Add simple decrease_balance test

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Fix decrease_balance_at_most

* Fix decrease_balance_at_most in fungibles

* Rename free_balanceto balance_on_free

* Use reducible_balance instead of balance_on_free

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
This commit is contained in:
zjb0807
2022-11-02 22:56:48 +13:00
committed by GitHub
parent 73a65711e8
commit a5d876f79a
4 changed files with 175 additions and 11 deletions
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substrate/frame/balances/src/lib.rs
+8 -4
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@@ -1149,15 +1149,19 @@ impl<T: Config<I>, I: 'static> fungible::Transfer<T::AccountId> for Pallet<T, I>
impl<T: Config<I>, I: 'static> fungible::Unbalanced<T::AccountId> for Pallet<T, I> {
fn set_balance(who: &T::AccountId, amount: Self::Balance) -> DispatchResult {
Self::mutate_account(who, |account| {
account.free = amount;
Self::mutate_account(who, |account| -> DispatchResult {
// fungibles::Unbalanced::decrease_balance didn't check account.reserved
// free = new_balance - reserved
account.free =
amount.checked_sub(&account.reserved).ok_or(ArithmeticError::Underflow)?;
Self::deposit_event(Event::BalanceSet {
who: who.clone(),
free: account.free,
reserved: account.reserved,
});
})?;
Ok(())
Ok(())
})?
}
fn set_total_issuance(amount: Self::Balance) {