About

Imported from jeremylongshore/tons-of-skills-marketplace (skills/.curated/quicknode-hello-world/SKILL.md). Install upstream with npx skills add jeremylongshore/tons-of-skills-marketplace --skill quicknode-hello-world. Copyright stays with the author (MIT).

QuickNode Hello World

Name: quicknode-hello-world
Author: jeremylongshore

Overview

Make your first blockchain queries: get block number, check ETH balance, read a smart contract.

Prerequisites

Completed quicknode-install-auth with endpoint URL

Instructions

Step 1: Get Block Number

import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(process.env.QUICKNODE_ENDPOINT);

const blockNumber = await provider.getBlockNumber();
console.log(`Current block: ${blockNumber}`);

Step 2: Check ETH Balance

const address = '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045'; // vitalik.eth
const balance = await provider.getBalance(address);
console.log(`Balance: ${ethers.formatEther(balance)} ETH`);

Step 3: Read Smart Contract (ERC-20 Token)

const usdcAddress = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48';
const abi = ['function balanceOf(address) view returns (uint256)', 'function decimals() view returns (uint8)'];
const usdc = new ethers.Contract(usdcAddress, abi, provider);

const decimals = await usdc.decimals();
const balance = await usdc.balanceOf(address);
console.log(`USDC balance: ${ethers.formatUnits(balance, decimals)}`);

Step 4: Get Transaction Receipt

const txHash = '0xabc...'; // Any transaction hash
const receipt = await provider.getTransactionReceipt(txHash);
console.log(`Status: ${receipt?.status === 1 ? 'Success' : 'Failed'}`);
console.log(`Gas used: ${receipt?.gasUsed.toString()}`);

Output

Block number retrieved
ETH balance checked
ERC-20 contract read
Transaction receipt fetched

Error Handling

Error	Cause	Solution
`null` receipt	TX pending or invalid hash	Wait for confirmation or verify hash
`call revert exception`	Wrong ABI or address	Verify contract address and ABI
Balance is 0n	Address has no ETH	Try a known address like vitalik.eth

Resources

Next Steps

Build transaction workflows: quicknode-core-workflow-a

Use it

Copy one of these into your project. Installing also returns the manifest and these snippets.

yaml

targets:
  - https://api.opensmartroute.ai/api/v1/registry/jeremylongshore-tons-of-skills-marketplace-quicknode-hel-59624e/manifest   # or paste the manifest below

Manifest

An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.

jeremylongshore-tons-of-skills-marketplace-quicknode-hel-59624e.ocm.jsonjson

{
  "ocm": "1",
  "id": "jeremylongshore-tons-of-skills-marketplace-quicknode-hel-59624e",
  "kind": "skill",
  "name": "quicknode-hello-world",
  "description": "QuickNode hello world — blockchain RPC and Web3 infrastructure integration. Use when working with QuickNode for blockchain development. Trigger with phrases like \"quicknode hello world\", \"quicknode-hello-world\", \"blockchain RPC\".",
  "publisher": "jeremylongshore",
  "version": "1.0.0",
  "capabilities": {
    "domains": [
      "general_chat"
    ],
    "tags": [
      "skill-md",
      "saas",
      "quicknode",
      "blockchain",
      "web3",
      "rpc",
      "ethereum",
      "skills-sh"
    ],
    "languages": [
      "en"
    ]
  },
  "quality_prior": 0.6,
  "examples": [
    "QuickNode hello world — blockchain RPC and Web3 infrastructure integration. Use when working with QuickNode for blockchain development. Trigger with phrases like \"quicknode hello world\", \"quicknode-hello-world\", \"blockchain RPC\"."
  ],
  "primary": false,
  "metadata": {
    "source": {
      "provider": "skills.sh",
      "repository": "https://github.com/jeremylongshore/tons-of-skills-marketplace",
      "path": "skills/.curated/quicknode-hello-world/SKILL.md",
      "ref": "HEAD",
      "url": "https://github.com/jeremylongshore/tons-of-skills-marketplace/blob/HEAD/skills/.curated/quicknode-hello-world/SKILL.md",
      "key": "jeremylongshore/tons-of-skills-marketplace/skills/.curated/quicknode-hello-world/SKILL.md"
    },
    "compatibility": "Designed for Claude Code",
    "allowed_tools": [
      "Read,",
      "Write,",
      "Edit,",
      "Bash(npm:*),",
      "Bash(curl:*),",
      "Grep"
    ],
    "license": "MIT"
  },
  "instructions": "# QuickNode Hello World\n\n## Overview\n\nMake your first blockchain queries: get block number, check ETH balance, read a smart contract.\n\n## Prerequisites\n\n- Completed `quicknode-install-auth` with endpoint URL\n\n## Instructions\n\n### Step 1: Get Block Number\n\n```typescript\nimport { ethers } from 'ethers';\nconst provider = new ethers.JsonRpcProvider(process.env.QUICKNODE_ENDPOINT);\n\nconst blockNumber = await provider.getBlockNumber();\nconsole.log(`Current block: ${blockNumber}`);\n```\n\n### Step 2: Check ETH Balance\n\n```typescript\nconst address = '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045'; // vital",
  "cost": {
    "context_tokens": 534
  }
}

Fetch it by URL: GET /api/v1/registry/jeremylongshore-tons-of-skills-marketplace-quicknode-hel-59624e/manifest?version=1.0.0

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