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Fix semantics of ExistenceRequirement::KeepAlive. (#3796)

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* Fix semantics of ExistenceRequirement::KeepAlive.

* Bump runtime version
This commit is contained in:
Gavin Wood
2019-10-11 13:59:26 +02:00
committed by GitHub
parent 4dbc9265ee
commit eba7df9a7b
4 changed files with 49 additions and 3 deletions
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substrate/srml/support/src/traits.rs
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@@ -156,6 +156,9 @@ impl<Imbalance: Drop> OnUnbalanced<Imbalance> for () {
#[derive(Copy, Clone, Eq, PartialEq)]
pub enum ExistenceRequirement {
/// Operation must not result in the account going out of existence.
///
/// Note this implies that if the account never existed in the first place, then the operation
/// may legitimately leave the account unchanged and still non-existent.
KeepAlive,
/// Operation may result in account going out of existence.
AllowDeath,