feat(wasm-utxo): add network support utilities for fixtures

Extract fixture network filtering into a utility function. This improves
code organization and reduces duplication across test files. Now includes
bitcoincash and bitcoingold in fixture networks.

Issue: BTC-2656

Co-authored-by: llm-git <[email protected]>

Author: OttoAllmendinger

packages/wasm-utxo/test/fixedScript/finalizeExtract.ts

@@ -7,20 +7,10 @@ import {
   getExtractedTransactionHex,
   type Fixture,
 } from "./fixtureUtil.js";
+import { getFixtureNetworks } from "./networkSupport.util.js";
 
 describe("finalize and extract transaction", function () {
-  const supportedNetworks = utxolib.getNetworkList().filter((network) => {
-    return (
-      utxolib.isMainnet(network) &&
-      network !== utxolib.networks.bitcoincash &&
-      network !== utxolib.networks.bitcoingold &&
-      network !== utxolib.networks.bitcoinsv &&
-      network !== utxolib.networks.ecash &&
-      network !== utxolib.networks.zcash
-    );
-  });
-
-  supportedNetworks.forEach((network) => {
+  getFixtureNetworks().forEach((network) => {
     const networkName = utxolib.getNetworkName(network);
 
     describe(`network: ${networkName}`, function () {

packages/wasm-utxo/test/fixedScript/networkSupport.util.ts

@@ -0,0 +1,17 @@
+import * as utxolib from "@bitgo/utxo-lib";
+
+/**
+ * Get networks that have psbt fixtures
+ */
+export function getFixtureNetworks(): utxolib.Network[] {
+  return utxolib.getNetworkList().filter((network) => {
+    return (
+      // we only have fixtures for mainnet networks
+      utxolib.isMainnet(network) &&
+      // we don't have fixtures for bitcoinsv since it is not really supported any longer
+      network !== utxolib.networks.bitcoinsv &&
+      // we do have zcash fixtures but it is not fully implemented yet
+      network !== utxolib.networks.zcash
+    );
+  });
+}

packages/wasm-utxo/test/fixedScript/parseTransactionWithWalletKeys.ts

@@ -11,6 +11,7 @@ import {
   loadReplayProtectionKeyFromFixture,
   type Fixture,
 } from "./fixtureUtil.js";
+import { getFixtureNetworks } from "./networkSupport.util.js";
 
 function getExpectedInputScriptType(fixtureScriptType: string): InputScriptType {
   // Map fixture types to InputScriptType values
@@ -38,18 +39,7 @@ function getOtherWalletKeys(): utxolib.bitgo.RootWalletKeys {
 }
 
 describe("parseTransactionWithWalletKeys", function () {
-  const supportedNetworks = utxolib.getNetworkList().filter((network) => {
-    return (
-      utxolib.isMainnet(network) &&
-      network !== utxolib.networks.bitcoincash &&
-      network !== utxolib.networks.bitcoingold &&
-      network !== utxolib.networks.bitcoinsv &&
-      network !== utxolib.networks.ecash &&
-      network !== utxolib.networks.zcash
-    );
-  });
-
-  supportedNetworks.forEach((network) => {
+  getFixtureNetworks().forEach((network) => {
     const networkName = utxolib.getNetworkName(network);
 
     describe(`network: ${networkName}`, function () {

packages/wasm-utxo/test/fixedScript/signAndVerifySignature.ts

@@ -14,6 +14,7 @@ import {
   type Fixture,
   loadReplayProtectionKeyFromFixture,
 } from "./fixtureUtil.js";
+import { getFixtureNetworks } from "./networkSupport.util.js";
 
 type SignatureStage = "unsigned" | "halfsigned" | "fullsigned";
 
@@ -279,18 +280,7 @@ function runTestsForFixture(
 }
 
 describe("verifySignature", function () {
-  const supportedNetworks = utxolib.getNetworkList().filter((network) => {
-    return (
-      utxolib.isMainnet(network) &&
-      network !== utxolib.networks.bitcoincash &&
-      network !== utxolib.networks.bitcoingold &&
-      network !== utxolib.networks.bitcoinsv &&
-      network !== utxolib.networks.ecash &&
-      network !== utxolib.networks.zcash
-    );
-  });
-
-  supportedNetworks.forEach((network) => {
+  getFixtureNetworks().forEach((network) => {
     const networkName = utxolib.getNetworkName(network);
 
     describe(`network: ${networkName}`, function () {