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Refactor out MaxPossibleReward, fix staking arithmetic (#4041)

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* Refactor out MaxPossibleReward, fix staking arithmetic

* Fix rounding error in test
This commit is contained in:
Gavin Wood
2019-11-07 12:34:13 +01:00
committed by GitHub
parent dcee91412c
commit bb6b3db57e
6 changed files with 52 additions and 44 deletions
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substrate/srml/staking/reward-curve/src/lib.rs
+9
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@@ -323,6 +323,14 @@ fn compute_points(input: &INposInput) -> Vec<(u32, u32)> {
fn generate_piecewise_linear(points: Vec<(u32, u32)>) -> TokenStream2 {
let mut points_tokens = quote!();
let max = points.iter()
.map(|&(_, x)| x)
.max()
.unwrap_or(0)
.checked_mul(1_000)
// clip at 1.0 for sanity only since it'll panic later if too high.
.unwrap_or(1_000_000_000);
for (x, y) in points {
let error = || panic!(format!(
"Generated reward curve approximation doesn't fit into [0, 1] -> [0, 1] \
@@ -346,6 +354,7 @@ fn generate_piecewise_linear(points: Vec<(u32, u32)>) -> TokenStream2 {
quote!(
_sr_primitives::curve::PiecewiseLinear::<'static> {
points: & [ #points_tokens ],
maximum: _sr_primitives::Perbill::from_parts(#max),
}
)
}