Fix BigInt serialization in parseJSON utility

Author: iamalwaysuncomfortable

sdk/src/utils.ts

@@ -6,7 +6,7 @@ export function logAndThrow(message: string): never {
 
 export function parseJSON(json: string): any {
     function revive(key: string, value: any, context: any) {
-        if (Number.isInteger(value) && value.length > 15) {
+        if (Number.isInteger(value)) {
             return BigInt(context.source);
         } else {
             return value;

sdk/tests/network-client.test.ts

@@ -357,7 +357,7 @@ describe('NodeConnection', () => {
                 expect(transactions.length).equal(4);
                 expect(transactions[0].status).equal("accepted");
                 expect(transactions[0].type).equal("execute");
-                expect(transactions[0].index).equal(0);
+                expect(transactions[0].index).equal(BigInt(0));
                 expect(transactions[0].finalize.length).equal(1);
                 expect(transactions[0].transaction.id).equal("at1fjy6s9md2v4rgcn3j3q4qndtfaa2zvg58a4uha0rujvrn4cumu9qfazxdd");
                 expect(transactions[0].transaction.type).equal("execute");