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Merge pull request #54 from developerfred/improve-error-handling-code-runner
Add Asset Hub Operations Example
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‎src/lib/examples/AssetHubExample.ts‎

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import type { Network } from "../types/network";
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import { ExampleFactory } from "./factory";
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export class AssetHubExample extends ExampleFactory {
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constructor() {
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super({
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id: "asset-hub-operations",
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name: "Asset Hub Operations",
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description: "Demonstrate Asset Hub operations: foreign assets, teleport assets, and reserve transfers",
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level: "advanced",
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categories: ["assets", "xcm", "transfers", "parachains"],
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});
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}
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generateCode(network: Network): string {
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return `// Asset Hub Operations Example on ${network.name}
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${this.getImports(network, true)}
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// Connect to ${network.name} Asset Hub
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const client = createClient(
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withPolkadotSdkCompat(
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getWsProvider("${network.endpoint}")
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)
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);
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// Get the typed API using the descriptors
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const typedApi = client.getTypedApi(${network.descriptorKey});
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// Asset Hub operations demonstration
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const demonstrateAssetHubOperations = async () => {
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try {
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console.log("🚀 Starting Asset Hub operations demonstration...");
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// 1. Query foreign assets
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console.log("\\n🔍 Querying foreign assets:");
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const foreignAssets = await typedApi.query.ForeignAssets.Asset.getEntries();
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console.log("Found", foreignAssets.length, "foreign assets");
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if (foreignAssets.length > 0) {
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const firstAsset = foreignAssets[0];
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console.log("First asset details:", {
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assetId: firstAsset.key?.args?.[0],
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details: firstAsset.value
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});
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}
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// 2. Query asset balances
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console.log("\\n💰 Querying asset balances:");
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const aliceAddress = "${this.getTestAccount("alice")}";
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// Native token balance (DOT/KSM)
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const nativeBalance = await typedApi.query.System.Account.getValue(aliceAddress);
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console.log("Native balance:", nativeBalance.data.free.toString(), "${network.tokenSymbol}");
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// 3. Demonstrate asset transfer (would require foreign asset)
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console.log("\\n📤 Asset Transfer Example:");
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console.log("This would transfer foreign assets between accounts:");
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const transferTx = typedApi.tx.ForeignAssets.transfer({
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id: { parents: 0, interior: { X1: { PalletInstance: 50 } } }, // Example asset ID
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target: MultiAddress.Id("${this.getTestAccount("bob")}"),
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amount: 1000000000000n // 1000 tokens (adjust for decimals)
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});
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console.log("Asset transfer transaction created (not submitted in simulator)");
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// 4. Demonstrate teleport assets (XCM)
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console.log("\\n✈️ Teleport Assets Example:");
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console.log("This would teleport assets to another parachain:");
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const teleportTx = typedApi.tx.PolkadotXcm.teleport_assets({
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dest: {
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V4: {
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parents: 1,
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interior: {
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X1: { Parachain: 2000 } // Example parachain ID
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}
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}
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},
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beneficiary: {
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V4: {
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parents: 0,
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interior: {
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X1: { AccountId32: { id: "${this.getTestAccount("alice")}" } }
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}
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}
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},
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assets: {
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V4: [{
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id: { Concrete: { parents: 1, interior: "Here" } },
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fun: { Fungible: 1000000000000n }
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}]
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},
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fee_asset_item: 0
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});
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console.log("Teleport transaction created (not submitted in simulator)");
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// 5. Query reserve transfers
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console.log("\\n🔄 Reserve Transfer Example:");
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console.log("This would perform a reserve transfer to another parachain:");
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const reserveTransferTx = typedApi.tx.PolkadotXcm.reserve_transfer_assets({
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dest: {
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V4: {
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parents: 1,
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interior: {
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X1: { Parachain: 2000 }
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}
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}
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},
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beneficiary: {
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V4: {
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parents: 0,
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interior: {
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X1: { AccountId32: { id: "${this.getTestAccount("bob")}" } }
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}
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}
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},
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assets: {
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V4: [{
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id: { Concrete: { parents: 1, interior: "Here" } },
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fun: { Fungible: 500000000000n }
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}]
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},
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fee_asset_item: 0
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});
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console.log("Reserve transfer transaction created (not submitted in simulator)");
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// 6. Query asset metadata
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console.log("\\n📋 Asset Metadata:");
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try {
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const assetMetadata = await typedApi.query.ForeignAssets.Metadata.getEntries();
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console.log("Found metadata for", assetMetadata.length, "assets");
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if (assetMetadata.length > 0) {
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const firstMetadata = assetMetadata[0];
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console.log("Asset metadata:", {
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assetId: firstMetadata.key?.args?.[0],
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name: firstMetadata.value?.name?.toString(),
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symbol: firstMetadata.value?.symbol?.toString(),
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decimals: firstMetadata.value?.decimals?.toString()
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});
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}
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} catch (error) {
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console.log("Asset metadata not available or different structure");
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}
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// 7. Query asset approvals
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console.log("\\n✅ Asset Approvals:");
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try {
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const approvals = await typedApi.query.ForeignAssets.Approvals.getEntries();
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console.log("Found", approvals.length, "asset approvals");
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} catch (error) {
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console.log("Asset approvals query not available");
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}
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console.log("\\n✅ Asset Hub operations demonstration completed!");
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console.log("Note: Asset Hub operations typically require:");
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console.log("- Foreign asset registration on the hub");
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console.log("- Sufficient balance of the asset");
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console.log("- Proper XCM configuration between chains");
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console.log("- In a real application, you would sign and submit these transactions");
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} catch (error) {
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console.error("❌ Error in Asset Hub operations:", error);
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}
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};
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demonstrateAssetHubOperations().catch(console.error);
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`;
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}
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}

‎src/lib/examples/index.ts‎

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/* eslint-disable @typescript-eslint/ban-ts-comment */
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import { exampleRegistry } from "./factory";
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import { StakingOperationsExample } from "./StakingOperationsExample";
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import { AssetHubExample } from "./AssetHubExample";
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import { SimpleTransferExample } from "./SimpleTransferExample";
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import { NetworkDashboardExample } from "./NetworkDashboardExample";
@@ -10,6 +12,8 @@ import { AcalaDeFiExample } from "./AcalaDeFiExample";
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import type { Example, ExampleLevel } from "../types/example";
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import { PolkadotGovernanceExample } from "./PolkadotGovernanceExample";
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new AssetHubExample(),
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new StakingOperationsExample(),
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exampleRegistry.registerMany([

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