feat: felt252 implementation

__tests__/cairo1.test.ts

@@ -76,5 +76,17 @@ describeIfDevnetSequencer('Cairo 1', () => {
 
       expect(toBigInt(balance[0])).toBe(100n);
     });
+
+    test('Cairo 1 Contract Interaction - with validation', async () => {
+      const cairo1Contract = new Contract(compiledHelloSierra.abi, contractAddress, account);
+
+      const tx = await cairo1Contract.increase_balance(100);
+
+      await account.waitForTransaction(tx.transaction_hash);
+
+      const balance = await cairo1Contract.get_balance();
+
+      expect(toBigInt(balance[0])).toBe(200n);
+    });
   });
 });

src/contract/default.ts

@@ -87,6 +87,11 @@ function buildEstimate(contract: Contract, functionAbi: FunctionAbi): ContractFu
   };
 }
 
+const detectCairoVersion = (abi: Abi) => {
+  if (!abi) return '0';
+  return abi.find((it) => 'state_mutability' in it) ? '1' : '0';
+};
+
 export class Contract implements ContractInterface {
   abi: Abi;
 
@@ -110,23 +115,28 @@ export class Contract implements ContractInterface {
 
   private callData: CallData;
 
+  private version: string = '0';
+
   /**
    * Contract class to handle contract methods
    *
    * @param abi - Abi of the contract object
    * @param address (optional) - address to connect to
    * @param providerOrAccount (optional) - Provider or Account to attach to
+   * @param cairoVersion (optional) - default '0', for Cairo 1 set '1'
    */
   constructor(
     abi: Abi,
     address: string,
-    providerOrAccount: ProviderInterface | AccountInterface = defaultProvider
+    providerOrAccount: ProviderInterface | AccountInterface = defaultProvider,
+    cairoVersion: string = detectCairoVersion(abi)
   ) {
     this.address = address && address.toLowerCase();
     this.providerOrAccount = providerOrAccount;
     this.callData = new CallData(abi);
     this.structs = CallData.getAbiStruct(abi);
     this.abi = abi;
+    this.version = cairoVersion;
 
     const options = { enumerable: true, value: {}, writable: false };
     Object.defineProperties(this, {

src/utils/calldata/cairo.ts

@@ -4,7 +4,7 @@ import { encodeShortString, isShortString, isText } from '../shortString';
 import { UINT_128_MAX, Uint256, isUint256 } from '../uint256';
 
 export const isLen = (name: string) => /_len$/.test(name);
-export const isTypeFelt = (type: string) => type === 'felt';
+export const isTypeFelt = (type: string) => type === 'felt' || type === 'core::felt252';
 export const isTypeFeltArray = (type: string) => type === 'felt*';
 export const isTypeArray = (type: string) => /\*/.test(type);
 export const isTypeTuple = (type: string) => /^\(.*\)$/i.test(type);

src/utils/calldata/index.ts

@@ -130,10 +130,11 @@ export class CallData {
     const { outputs } = this.abi.find((abi) => abi.name === method) as FunctionAbi;
     const responseIterator = response.flat()[Symbol.iterator]();
 
-    return outputs.flat().reduce((acc, output) => {
-      acc[output.name] = responseParser(responseIterator, output, this.structs, acc);
-      if (acc[output.name] && acc[`${output.name}_len`]) {
-        delete acc[`${output.name}_len`];
+    return outputs.flat().reduce((acc, output, idx) => {
+      const propName = output.name ?? idx;
+      acc[propName] = responseParser(responseIterator, output, this.structs, acc);
+      if (acc[propName] && acc[`${propName}_len`]) {
+        delete acc[`${propName}_len`];
       }
       return acc;
     }, {} as Args);