initial commit after branch change

Author: AryanGodara

__tests__/utils/calldataDecode.test.ts

@@ -0,0 +1,62 @@
+import { parseCalldataField } from '../../src/utils/calldata/requestParser';
+import { decodeCalldataField } from '../../src/utils/calldata/calldataDecoder';
+import assert from '../../src/utils/assert';
+import { CairoUint256 } from '../../src/utils/cairoDataTypes/uint256';
+import { AbiEnums, AbiStructs } from '../../src/types';
+
+describe('Encode-Decode CalldataField Flow', () => {
+  it('correctly encodes and decodes various types', () => {
+    // Setup
+    const structs: AbiStructs = {
+      SimpleStruct: {
+        type: 'struct',
+        name: 'SimpleStruct',
+        size: 2,
+        members: [
+          { name: 'id', type: 'felt', offset: 0 },
+          { name: 'value', type: 'core::integer::u256', offset: 0 },
+        ],
+      },
+    };
+    const enums: AbiEnums = {}; // Assuming no enums for this test
+    const simpleStructValue = { id: felt(123), value: new CairoUint256('0x1') };
+
+    // Create a simple iterator for each value
+    function* createIterator(value: any): Iterator<any> {
+      yield value;
+    }
+
+    // Encode
+    const encodedId = parseCalldataField(
+      createIterator(simpleStructValue.id),
+      { name: 'id', type: 'felt' },
+      structs,
+      enums
+    );
+    const encodedValue = parseCalldataField(
+      createIterator(simpleStructValue.value.toApiRequest()),
+      { name: 'value', type: 'core::integer::u256' },
+      structs,
+      enums
+    );
+
+    // Decode
+    const decodedId = decodeCalldataField(
+      typeof encodedId === 'string' ? [encodedId] : encodedId,
+      { name: 'id', type: 'felt' },
+      structs,
+      enums
+    );
+    const decodedValue = decodeCalldataField(
+      typeof encodedValue === 'string' ? [encodedValue] : encodedValue,
+      { name: 'value', type: 'core::integer::u256' },
+      structs,
+      enums
+    );
+
+    // Assertions
+    assert(decodedId.toEqual(simpleStructValue.id));
+    assert(decodedValue.toBigInt().toEqual(simpleStructValue.value.toBigInt()));
+    // assert(2 - 1 === 1, 'abcd');
+  });
+});

src/utils/cairoDataTypes/uint256.ts

@@ -133,4 +133,24 @@ export class CairoUint256 {
   toApiRequest() {
     return [CairoFelt(this.low), CairoFelt(this.high)];
   }
+
+  /**
+   * Construct CairoUint256 from calldata
+   * @param calldata Array of two strings representing the low and high parts of a uint256.
+   */
+  static fromCalldata(calldata: [string, string]): CairoUint256 {
+    if (calldata.length !== 2) {
+      throw new Error(
+        'Calldata must contain exactly two elements for low and high parts of uint256.'
+      );
+    }
+
+    // Validate each part to ensure they are within the acceptable range.
+    const [low, high] = calldata;
+    const validatedLow = CairoUint256.validateProps(low, UINT_256_LOW_MIN.toString());
+    const validatedHigh = CairoUint256.validateProps(high, UINT_256_HIGH_MIN.toString());
+
+    // Construct a new instance based on the validated low and high parts.
+    return new CairoUint256(validatedLow.low, validatedHigh.high);
+  }
 }