remove js-xdr dependency, use cereal namespace

package.json

@@ -145,7 +145,6 @@
     "webpack-cli": "^5.0.1"
   },
   "dependencies": {
-    "@stellar/js-xdr": "^3.1.1",
     "@stellar/stellar-base": "11.1.0",
     "axios": "^1.6.8",
     "bignumber.js": "^9.1.2",

src/contract_client/client.ts

@@ -61,7 +61,7 @@ export class ContractClient {
     options: ContractClientOptions, 
     format: "hex" | "base64" = "hex"
   ): Promise<ContractClient> {
-    if (!options || !options.rpcUrl ) {
+    if (!options || !options.rpcUrl) {
       throw new TypeError('options must contain rpcUrl');
     }
     const { rpcUrl, allowHttp } = options;

src/contract_client/utils.ts

@@ -1,6 +1,4 @@
-// @ts-ignore
-import { XdrReader } from "@stellar/js-xdr";
-import { xdr } from "..";
+import { xdr, cereal } from "..";
 
 /**
  * The default timeout for waiting for a transaction to be included in a block.
@@ -89,9 +87,10 @@ export function implementsToString(obj: unknown): obj is { toString(): string }
  * Reads a binary stream of ScSpecEntries into an array for processing by ContractSpec
  */
 export function processSpecEntryStream(buffer: Buffer) {
-  const reader = new XdrReader(buffer);
+  const reader = new cereal.XdrReader(buffer);
   const res: xdr.ScSpecEntry[] = [];
-  while (reader._index < reader._length) {
+  while (!reader.eof){
+    // @ts-ignore 
     res.push(xdr.ScSpecEntry.read(reader));
   }
   return res;

src/soroban/server.ts

@@ -248,7 +248,6 @@ export class Server {
    * @returns {Promise<Buffer>}   a Buffer containing the WASM bytecode
    *
    * @throws {Error} If the contract or its associated WASM bytecode cannot be
-   * :
    *    found on the network.
    *
    * @example