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ref: improve casting usage example #131

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Merged
bidzyyys merged 2 commits into from
Jan 19, 2026
Merged

ref: improve casting usage example #131

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b4a9be4
feat: improve example
ericnordelo Jan 13, 2026
be13839
feat: format files
ericnordelo Jan 13, 2026
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6 changes: 4 additions & 2 deletions math/fixed_point/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -16,10 +16,12 @@ Fixed-point decimal types with 9 decimals (10^9), matching Sui coin precision.
## Casting and helpers

```rust
use openzeppelin_fp_math::{casting_u128, sd29x9, ud30x9};
use openzeppelin_fp_math::{sd29x9, ud30x9};
use openzeppelin_fp_math::casting_u128::into_UD30x9;
use fun into_UD30x9 as u128.into_UD30x9;

let value = ud30x9::wrap(1000000000); // 1.0
let value = casting_u128::into_UD30x9(1000000000);
let value = 1000000000_u128.into_UD30x9(); // Casting

let positive = sd29x9::wrap(1000000000, false); // 1.0
let negative = sd29x9::wrap(1000000000, true); // -1.0
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6 changes: 4 additions & 2 deletions math/fixed_point/tests/ud30x9_tests.move
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Original file line number Diff line number Diff line change
@@ -1,10 +1,12 @@
#[test_only]
module openzeppelin_fp_math::ud30x9_tests;

use openzeppelin_fp_math::casting_u128;
use openzeppelin_fp_math::casting_u128::into_UD30x9;
use openzeppelin_fp_math::ud30x9::{Self, UD30x9};
use std::unit_test::assert_eq;

use fun into_UD30x9 as u128.into_UD30x9;

const MAX_VALUE: u128 = 0xFFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF;

// ==== Helpers ====
Expand Down Expand Up @@ -160,7 +162,7 @@ fun modulo_and_zero_helpers_match_u128() {
#[test]
fun casting_from_u128_matches_wrap() {
let raw = 987_654_321u128;
let casted = casting_u128::into_UD30x9(raw);
let casted = raw.into_UD30x9();
assert_eq!(casted.unwrap(), raw);

let manual = fixed(raw);
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