Merge pull request multiversx#1889 from multiversx/mdec-fixes

ManagedDecimal - 2 bug fixes

.github/workflows/actions.yml

@@ -16,7 +16,7 @@ jobs:
     name: Contracts
     uses: multiversx/mx-sc-actions/.github/workflows/contracts.yml@4ec1f927bd99ed90a816ded805daa75fd2040258
     with:
-      rust-toolchain: stable
+      rust-toolchain: 1.82
       path-to-sc-meta: framework/meta
       mx-scenario-go-version: v2.1.0-alpha
       coverage-args: --ignore-filename-regex='meta/src' --ignore-filename-regex='wasm-adapter' --ignore-filename-regex='benchmarks/' --ignore-filename-regex='tests/' --output ./coverage.md

.github/workflows/lldb-formatter-tests.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           default: true
-          toolchain: stable
+          toolchain: 1.82
 
       - name: Download vscode-lldb
         uses: robinraju/[email protected]

.github/workflows/plotter-test.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Install rust
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: 1.82
           target: wasm32-unknown-unknown
 
       - name: Run plotter tests

.github/workflows/proxy-compare.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           default: true
-          toolchain: stable
+          toolchain: 1.82
           target: wasm32-unknown-unknown
 
       - name: Install prerequisites

.github/workflows/template-test-current.yml

@@ -22,7 +22,7 @@ jobs:
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           default: true
-          toolchain: stable
+          toolchain: 1.82
           target: wasm32-unknown-unknown
 
       - name: Install prerequisites

.github/workflows/template-test-released.yml

@@ -22,7 +22,7 @@ jobs:
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           default: true
-          toolchain: stable
+          toolchain: 1.82
           target: wasm32-unknown-unknown
 
       - name: Install prerequisites

contracts/feature-tests/abi-tester/abi_tester_expected_main.abi.json

@@ -247,6 +247,21 @@
                 }
             ]
         },
+        {
+            "name": "process_managed_decimal",
+            "mutability": "mutable",
+            "inputs": [
+                {
+                    "name": "input",
+                    "type": "ManagedDecimal<10>"
+                }
+            ],
+            "outputs": [
+                {
+                    "type": "ManagedDecimal<usize>"
+                }
+            ]
+        },
         {
             "name": "esdt_local_role",
             "mutability": "mutable",

contracts/feature-tests/abi-tester/src/abi_proxy.rs

@@ -236,6 +236,19 @@ where
             .original_result()
     }
 
+    pub fn process_managed_decimal<
+        Arg0: ProxyArg<ManagedDecimal<Env::Api, ConstDecimals<10>>>,
+    >(
+        self,
+        input: Arg0,
+    ) -> TxTypedCall<Env, From, To, NotPayable, Gas, ManagedDecimal<Env::Api, usize>> {
+        self.wrapped_tx
+            .payment(NotPayable)
+            .raw_call("process_managed_decimal")
+            .argument(&input)
+            .original_result()
+    }
+
     pub fn esdt_local_role(
         self,
     ) -> TxTypedCall<Env, From, To, NotPayable, Gas, EsdtLocalRole> {

contracts/feature-tests/abi-tester/src/abi_tester.rs

@@ -110,6 +110,14 @@ pub trait AbiTester {
         (address, byte_array).into()
     }
 
+    #[endpoint]
+    fn process_managed_decimal(
+        &self,
+        input: ManagedDecimal<Self::Api, ConstDecimals<10>>,
+    ) -> ManagedDecimal<Self::Api, usize> {
+        input.into()
+    }
+
     #[endpoint]
     fn esdt_local_role(&self) -> EsdtLocalRole {
         EsdtLocalRole::None

contracts/feature-tests/abi-tester/wasm/src/lib.rs

@@ -6,9 +6,9 @@
 
 // Init:                                 1
 // Upgrade:                              1
-// Endpoints:                           29
+// Endpoints:                           30
 // Async Callback (empty):               1
-// Total number of exported functions:  32
+// Total number of exported functions:  33
 
 #![no_std]
 
@@ -31,6 +31,7 @@ multiversx_sc_wasm_adapter::endpoints! {
         optional_result => optional_result
         address_vs_h256 => address_vs_h256
         managed_address_vs_byte_array => managed_address_vs_byte_array
+        process_managed_decimal => process_managed_decimal
         esdt_local_role => esdt_local_role
         esdt_token_payment => esdt_token_payment
         esdt_token_data => esdt_token_data

framework/base/src/types/managed/wrapped/managed_decimal.rs

@@ -77,7 +77,7 @@ impl<M: ManagedTypeApi, D: Decimals> ManagedDecimal<M, D> {
             Ordering::Greater => {
                 let delta_decimals = from_num_decimals - scale_to_num_decimals;
                 let scaling_factor: &BigUint<M> = &delta_decimals.scaling_factor();
-                &self.data * scaling_factor
+                &self.data / scaling_factor
             },
         }
     }
@@ -128,6 +128,14 @@ impl<M: ManagedTypeApi, const DECIMALS: NumDecimals> ManagedDecimal<M, ConstDeci
     }
 }
 
+impl<M: ManagedTypeApi, const DECIMALS: NumDecimals>
+    From<ManagedDecimal<M, ConstDecimals<DECIMALS>>> for ManagedDecimal<M, NumDecimals>
+{
+    fn from(value: ManagedDecimal<M, ConstDecimals<DECIMALS>>) -> Self {
+        value.into_var_decimals()
+    }
+}
+
 impl<M: ManagedTypeApi, const DECIMALS: NumDecimals> TopEncode
     for ManagedDecimal<M, ConstDecimals<DECIMALS>>
 {
@@ -252,6 +260,10 @@ impl<M: ManagedTypeApi> TypeAbi for ManagedDecimal<M, NumDecimals> {
         TypeName::from("ManagedDecimal<usize>")
     }
 
+    fn type_name_rust() -> TypeName {
+        TypeName::from("ManagedDecimal<$API, usize>")
+    }
+
     fn is_variadic() -> bool {
         false
     }

framework/base/src/types/managed/wrapped/managed_decimal/managed_decimal_signed.rs

@@ -66,7 +66,7 @@ impl<M: ManagedTypeApi, D: Decimals> ManagedDecimalSigned<M, D> {
             Ordering::Greater => {
                 let delta_decimals = from_num_decimals - scale_to_num_decimals;
                 let scaling_factor: &BigUint<M> = &delta_decimals.scaling_factor();
-                &self.data * &scaling_factor.value
+                &self.data / &scaling_factor.value
             },
         }
     }

framework/scenario/tests/managed_decimal_test.rs

@@ -2,7 +2,8 @@ use multiversx_sc::{
     codec::test_util::{check_dep_encode_decode, check_top_encode_decode},
     derive::{debug_const_managed_decimal, debug_managed_decimal},
     types::{
-        BigFloat, BigInt, BigUint, ConstDecimals, ManagedDecimal, ManagedDecimalSigned, NumDecimals,
+        BigFloat, BigInt, BigUint, ConstDecimals, Decimals, ManagedDecimal, ManagedDecimalSigned,
+        NumDecimals,
     },
 };
 use multiversx_sc_scenario::api::StaticApi;
@@ -38,33 +39,83 @@ pub fn test_managed_decimal() {
         division,
         ManagedDecimal::<StaticApi, ConstDecimals<2>>::from(BigUint::from(5u64))
     );
+}
+
+fn assert_exact<D: Decimals>(dec: &ManagedDecimal<StaticApi, D>, raw_u64: u64, scale: usize) {
+    let raw_units = BigUint::from(raw_u64);
+    assert_eq!(dec.scale(), scale);
+    assert_eq!(dec.into_raw_units(), &raw_units);
+    assert_eq!(dec, &ManagedDecimal::from_raw_units(raw_units, scale));
+}
 
-    let fixed_4: ManagedDecimal<StaticApi, NumDecimals> =
+#[test]
+pub fn test_managed_decimal_rescale_unchanged() {
+    let dec: ManagedDecimal<StaticApi, NumDecimals> =
         ManagedDecimal::from_raw_units(BigUint::from(100u64), 2usize);
-    let fixed_5 = fixed_4.rescale(2usize);
+    assert_exact(&dec, 100u64, 2);
+    let rescaled = dec.rescale(2usize);
+    assert_exact(&rescaled, 100u64, 2);
     assert_eq!(
-        fixed_5,
+        rescaled,
         ManagedDecimal::from_raw_units(BigUint::from(100000000u64), 8usize)
     );
+}
 
-    let fixed_6: ManagedDecimal<StaticApi, ConstDecimals<2>> =
-        ManagedDecimal::from(BigUint::from(1500u64));
-    let fixed_7 = fixed_6.rescale(ConstDecimals::<8>);
+#[test]
+pub fn test_managed_decimal_rescale_up() {
+    let uint_value = 1500u64;
+    let dec: ManagedDecimal<StaticApi, ConstDecimals<2>> =
+        ManagedDecimal::from(BigUint::from(uint_value));
+    assert_exact(&dec, uint_value * 100, 2);
+    let rescaled = dec.rescale(ConstDecimals::<8>);
+    assert_exact(&rescaled, uint_value * 100000000, 8);
     assert_eq!(
-        fixed_7,
-        ManagedDecimal::<StaticApi, ConstDecimals<8>>::from(BigUint::from(1500u64))
+        rescaled,
+        ManagedDecimal::<StaticApi, ConstDecimals<8>>::from(BigUint::from(uint_value))
     );
+}
 
-    let fixed_8: ManagedDecimal<StaticApi, NumDecimals> =
-        ManagedDecimal::from_raw_units(BigUint::from(5u64), 5usize);
-    let fixed_9 = fixed_8.rescale(ConstDecimals::<3>);
+#[test]
+pub fn test_managed_decimal_rescale_down_1() {
+    // 1234.0000000 -> 1234.
+    let uint_value = 1234u64;
+    let dec: ManagedDecimal<StaticApi, ConstDecimals<7>> =
+        ManagedDecimal::from(BigUint::from(uint_value));
+    assert_exact(&dec, uint_value * 10000000, 7);
+    let rescaled = dec.rescale(ConstDecimals::<3>);
+    assert_exact(&rescaled, uint_value * 1000, 3);
+}
+
+#[test]
+pub fn test_managed_decimal_rescale_down_2() {
+    // 0.00009 -> 0.0000
+    let dec: ManagedDecimal<StaticApi, NumDecimals> =
+        ManagedDecimal::from_raw_units(BigUint::from(9u64), 5usize);
+    assert_exact(&dec, 9, 5);
+    let rescaled = dec.rescale(ConstDecimals::<4>);
+    assert_exact(&rescaled, 0, 4);
     assert_eq!(
-        fixed_9,
-        ManagedDecimal::<StaticApi, ConstDecimals<3>>::const_decimals_from_raw(BigUint::from(
-            500u64
-        ))
+        rescaled,
+        ManagedDecimal::<StaticApi, ConstDecimals<4>>::from(BigUint::zero())
     );
+}
 
+#[test]
+pub fn test_managed_decimal_rescale_down_3() {
+    // 1.00009 -> 1.0000
+    let dec: ManagedDecimal<StaticApi, NumDecimals> =
+        ManagedDecimal::from_raw_units(BigUint::from(100009u64), 5usize);
+    assert_exact(&dec, 100009, 5);
+    let rescaled = dec.rescale(ConstDecimals::<4>);
+    assert_exact(&rescaled, 10000, 4);
+    assert_eq!(
+        rescaled,
+        ManagedDecimal::<StaticApi, ConstDecimals<4>>::from(BigUint::from(1u64))
+    );
+}
+
+#[test]
+pub fn test_managed_decimal_from_big_float() {
     let float_1 = BigFloat::<StaticApi>::from_frac(3i64, 2i64);
     let fixed_float_1 = ManagedDecimalSigned::<StaticApi, ConstDecimals<1>>::from_big_float(
         &float_1,
@@ -166,6 +217,83 @@ pub fn test_addition_managed_decimal_signed() {
     assert_eq!(addition_4.trunc(), BigInt::from(1i64));
 }
 
+fn assert_exact_signed<D: Decimals>(
+    dec: &ManagedDecimalSigned<StaticApi, D>,
+    raw_u64: i64,
+    scale: usize,
+) {
+    let raw_units = BigInt::from(raw_u64);
+    assert_eq!(dec.scale(), scale);
+    assert_eq!(dec.into_raw_units(), &raw_units);
+    assert_eq!(dec, &ManagedDecimalSigned::from_raw_units(raw_units, scale));
+}
+
+#[test]
+pub fn test_managed_decimal_signed_rescale_unchanged() {
+    let dec: ManagedDecimalSigned<StaticApi, NumDecimals> =
+        ManagedDecimalSigned::from_raw_units(BigInt::from(100), 2usize);
+    assert_exact_signed(&dec, 100, 2);
+    let rescaled = dec.rescale(2usize);
+    assert_exact_signed(&rescaled, 100, 2);
+    assert_eq!(
+        rescaled,
+        ManagedDecimalSigned::from_raw_units(BigInt::from(100000000), 8usize)
+    );
+}
+
+#[test]
+pub fn test_managed_decimal_signed_rescale_up() {
+    let uint_value = -1500i64;
+    let dec: ManagedDecimalSigned<StaticApi, ConstDecimals<2>> =
+        ManagedDecimalSigned::from(BigInt::from(uint_value));
+    assert_exact_signed(&dec, uint_value * 100, 2);
+    let rescaled = dec.rescale(ConstDecimals::<8>);
+    assert_exact_signed(&rescaled, uint_value * 100000000, 8);
+    assert_eq!(
+        rescaled,
+        ManagedDecimalSigned::<StaticApi, ConstDecimals<8>>::from(BigInt::from(uint_value))
+    );
+}
+
+#[test]
+pub fn test_managed_decimal_signed_rescale_down_1() {
+    // -1234.0000000 -> -1234.
+    let uint_value = -1234;
+    let dec: ManagedDecimalSigned<StaticApi, ConstDecimals<7>> =
+        ManagedDecimalSigned::from(BigInt::from(uint_value));
+    assert_exact_signed(&dec, uint_value * 10000000, 7);
+    let rescaled = dec.rescale(ConstDecimals::<3>);
+    assert_exact_signed(&rescaled, uint_value * 1000, 3);
+}
+
+#[test]
+pub fn test_managed_decimal_signed_rescale_down_2() {
+    // 0.00009 -> 0.0000
+    let dec: ManagedDecimalSigned<StaticApi, NumDecimals> =
+        ManagedDecimalSigned::from_raw_units(BigInt::from(-9), 5usize);
+    assert_exact_signed(&dec, -9, 5);
+    let rescaled = dec.rescale(ConstDecimals::<4>);
+    assert_exact_signed(&rescaled, 0, 4);
+    assert_eq!(
+        rescaled,
+        ManagedDecimalSigned::<StaticApi, ConstDecimals<4>>::from(BigInt::zero())
+    );
+}
+
+#[test]
+pub fn test_managed_decimal_signed_rescale_down_3() {
+    // -1.00009 -> -1.0000
+    let dec: ManagedDecimalSigned<StaticApi, NumDecimals> =
+        ManagedDecimalSigned::from_raw_units(BigInt::from(-100009), 5usize);
+    assert_exact_signed(&dec, -100009, 5);
+    let rescaled = dec.rescale(ConstDecimals::<4>);
+    assert_exact_signed(&rescaled, -10000, 4);
+    assert_eq!(
+        rescaled,
+        ManagedDecimalSigned::<StaticApi, ConstDecimals<4>>::from(BigInt::from(-1))
+    );
+}
+
 #[test]
 pub fn test_substraction_managed_decimal_signed() {
     let fixed_1 = ManagedDecimalSigned::<StaticApi, ConstDecimals<2>>::from(BigInt::from(1i64));
@@ -260,30 +388,6 @@ pub fn test_devision_managed_decimal_signed() {
 
 #[test]
 pub fn test_rescale_managed_decimal_signed() {
-    let fixed_1: ManagedDecimalSigned<StaticApi, NumDecimals> =
-        ManagedDecimalSigned::from_raw_units(BigInt::from(-10000i64), 2usize);
-
-    let fixed_2 = fixed_1.rescale(3usize);
-    assert_eq!(
-        fixed_2,
-        ManagedDecimalSigned::from_raw_units(BigInt::from(-100000000i64), 6usize)
-    );
-
-    let fixed_3: ManagedDecimalSigned<StaticApi, ConstDecimals<2>> =
-        ManagedDecimalSigned::from(BigInt::from(-1500i64));
-    let fixed_4 = fixed_3.rescale(ConstDecimals::<8>);
-    assert_eq!(fixed_4.into_raw_units(), &BigInt::from(-150000000000i64));
-
-    let fixed_5: ManagedDecimalSigned<StaticApi, NumDecimals> =
-        ManagedDecimalSigned::from_raw_units(BigInt::from(-5i64), 5usize);
-    let fixed_6 = fixed_5.rescale(ConstDecimals::<3>);
-    assert_eq!(
-        fixed_6,
-        ManagedDecimalSigned::<StaticApi, ConstDecimals<3>>::const_decimals_from_raw(BigInt::from(
-            -500i64
-        ))
-    );
-
     let float_1 = BigFloat::<StaticApi>::from_frac(-3i64, 2i64);
     let fixed_float_1 = ManagedDecimalSigned::<StaticApi, ConstDecimals<1>>::from_big_float(
         &float_1,