Don't hardcode network ID in Core classes

Author: joojis

integration_tests/Transaction.spec.ts

@@ -54,14 +54,12 @@ test("AssetTransferTransaction fromJSON", async () => {
         .createMintTransaction({ recipient: addressA });
     await sendTransactions({ transactions: [mintTx] });
     const firstAsset = await sdk.rpc.chain.getAsset(mintTx.hash(), 0);
-
-    const transferTx = await firstAsset.createTransferTransaction({
-        recipients: [
-            {
-                address: addressB,
-                amount: 100
-            }
-        ]
+    const transferTx = await sdk.core.createAssetTransferTransaction();
+    transferTx.addInputs(firstAsset);
+    transferTx.addOutputs({
+        assetType: firstAsset.assetType,
+        recipient: addressB,
+        amount: 100
     });
     sdk.key.signTransactionInput(transferTx, 0);
     const { parcelHash } = await sendTransactions({

src/core/Asset.ts

@@ -96,18 +96,16 @@ export class Asset {
         });
     }
 
-    public createTransferTransaction(
-        params: {
-            recipients: Array<{
-                address: AssetTransferAddress | string;
-                amount: number;
-            }>;
-            nonce?: number;
-            networkId?: NetworkId;
-        } = { recipients: [] }
-    ): AssetTransferTransaction {
+    public createTransferTransaction(params: {
+        recipients?: Array<{
+            address: AssetTransferAddress | string;
+            amount: number;
+        }>;
+        nonce?: number;
+        networkId: NetworkId;
+    }): AssetTransferTransaction {
         const { outPoint, assetType } = this;
-        const { recipients, nonce = 0, networkId = "tc" } = params;
+        const { recipients = [], nonce = 0, networkId } = params;
 
         return new AssetTransferTransaction({
             burns: [],