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Introduce safe types for handling imbalances (#2048)

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* Be a little safer with total issuance.

* PairT instead of _Pair

* Remove rev causing upset

* Remove fees stuff.

* Fix build (including tests)

* Update runtime, bump version

* Fix

* Handle gas refunds properly.

* Rename identifier

ala #2025

* Address grumbles

* New not-quite-linear-typing API

* Slimmer API

* More linear-type test fixes

* Fix tests

* Tidy

* Fix some grumbles

* Keep unchecked functions private

* Remove another less-than-safe currency function and ensure that
contracts module can never create cash.

* Address a few grumbles and fix tests
This commit is contained in:
Gav Wood
2019-03-20 14:07:28 +01:00
committed by Robert Habermeier
parent f9e224e7b8
commit dcd77a147c
49 changed files with 1108 additions and 1100 deletions
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substrate/srml/contract/src/exec.rs
+2 -2
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@@ -20,7 +20,7 @@ use crate::gas::{GasMeter, Token, approx_gas_for_balance};
use rstd::prelude::*;
use runtime_primitives::traits::{CheckedAdd, CheckedSub, Zero};
use srml_support::traits::WithdrawReason;
use srml_support::traits::{WithdrawReason, Currency};
use timestamp;
pub type BalanceOf<T> = <T as balances::Trait>::Balance;
@@ -520,7 +520,7 @@ fn transfer<'a, T: Trait, V: Vm<T>, L: Loader<T>>(
if would_create && value < ctx.config.existential_deposit {
return Err("value too low to create account");
}
<balances::Module<T>>::ensure_account_can_withdraw(transactor, value, WithdrawReason::Transfer, new_from_balance)?;
<balances::Module<T>>::ensure_can_withdraw(transactor, value, WithdrawReason::Transfer, new_from_balance)?;
let new_to_balance = match to_balance.checked_add(&value) {
Some(b) => b,