本文へ移動
cccskills
無料GitHub で公開

ethers-js

Interact with Ethereum and EVM blockchains using ethers.js. Use when a user asks to connect to Ethereum, read blockchain data, send transactions, interact with smart contracts, or build a dApp frontend.

インストール方法を見る

含まれるファイル(2)

  • SKILL.md2.9 KB
  • _scores.json1.7 KB

SKILL.md(原文)

インストールする前に、エージェントに与えられる指示の中身を確認できます。

ethers.js

Overview

ethers.js is the most popular library for interacting with Ethereum and EVM-compatible blockchains (Polygon, Arbitrum, Base, BSC). It handles wallet connections, contract interactions, transaction signing, and blockchain queries.

Instructions

Step 1: Setup

npm install ethers

Step 2: Read Blockchain Data

// lib/ethereum.ts — Read-only blockchain access
import { ethers } from 'ethers'

// Connect to Ethereum (read-only)
const provider = new ethers.JsonRpcProvider('https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY')

// Get ETH balance
const balance = await provider.getBalance('0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18')
console.log(ethers.formatEther(balance))    // "1.234"

// Get current block
const block = await provider.getBlockNumber()

// Get transaction
const tx = await provider.getTransaction('0x...')

Step 3: Interact with Smart Contracts

// Read from a contract (no wallet needed)
const USDC_ADDRESS = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'
const ERC20_ABI = [
  'function balanceOf(address) view returns (uint256)',
  'function decimals() view returns (uint8)',
  'function symbol() view returns (string)',
  'function transfer(address to, uint256 amount) returns (bool)',
]

const usdc = new ethers.Contract(USDC_ADDRESS, ERC20_ABI, provider)
const balance = await usdc.balanceOf('0x...')
const decimals = await usdc.decimals()
console.log(ethers.formatUnits(balance, decimals))    // "1000.00"

Step 4: Send Transactions

// Write to blockchain (needs wallet)
const wallet = new ethers.Wallet(process.env.PRIVATE_KEY!, provider)
const usdcWithSigner = usdc.connect(wallet)

// Transfer USDC
const tx = await usdcWithSigner.transfer(
  '0xRecipient...',
  ethers.parseUnits('100', 6)    // 100 USDC (6 decimals)
)
await tx.wait()    // wait for confirmation
console.log('TX hash:', tx.hash)

Step 5: Frontend (MetaMask)

// Connect to user's MetaMask wallet
const provider = new ethers.BrowserProvider(window.ethereum)
const signer = await provider.getSigner()
const address = await signer.getAddress()

Guidelines

  • ethers.js v6 is current — v5 syntax is different (avoid mixing).
  • Never expose private keys in frontend code — use MetaMask/WalletConnect for user wallets.
  • Use Alchemy, Infura, or QuickNode as RPC providers — don't run your own node unless needed.
  • Always await tx.wait() before confirming success — tx.hash alone doesn't mean it's mined.

レビュー

まだレビューはありません。使ってみた感想をお寄せください。

同じリポジトリのスキル

概要と使いどころ

Scripts and configures production rendering in Autodesk 3ds Max with the V-Ray and Corona renderers: output size and files, render elements, denoising, light mix, batch and command-line rendering, and network rendering. Use when a user asks to set up a production render, render several cameras in one batch, render from the command line or on a render farm, add render passes for compositing, or cut render time for archviz and product shots.

日本語の概要は準備中です。原文の説明を表示しています。

TerminalSkills/skills1632026年10月4日 更新

Covers scripting Autodesk 3ds Max, the 3D modeling and rendering application, with MAXScript and Python (pymxs): scene manipulation, object creation, material assignment, camera and light setup, batch operations, and file I/O. Use when tasks involve automating repetitive 3ds Max workflows, batch processing scenes, running scripts headless with 3dsmaxbatch, creating custom tools, or scripting scene setup for archviz, product visualization, or VFX.

日本語の概要は準備中です。原文の説明を表示しています。

TerminalSkills/skills1632026年10月4日 更新

3proxy

無料

3proxy is a small open-source proxy server that runs HTTP/HTTPS, SOCKS4/5, SNI and TCP/UDP port-mapping proxies from one config file. Use when a user asks to set up an HTTP or SOCKS5 proxy, add proxy users and passwords, write 3proxy access rules, chain or rotate upstream (parent) proxies, limit bandwidth, connections or monthly traffic per user, run 3proxy in Docker, or fix a 3proxy.cfg that will not start.

日本語の概要は準備中です。原文の説明を表示しています。

TerminalSkills/skills1632026年10月4日 更新

Builds Agent2Agent (A2A) servers and clients, the open protocol (originally from Google, now under the Linux Foundation) that lets AI agents from different frameworks call each other. Use when the user wants to create an A2A-compliant agent, build an Agent Card, implement task management, connect agents across frameworks, set up agent discovery, handle streaming responses, implement push notifications, or orchestrate multi-agent workflows. Trigger words: a2a, agent to agent, agent2agent, a2a protocol, a2a server, a2a client, agent card, agent interoperability, agent collaboration, multi-agent, agent discovery, a2a sdk, a2a task.

日本語の概要は準備中です。原文の説明を表示しています。

TerminalSkills/skills1632026年10月4日 更新

Plans a controlled experiment (A/B test) so its result can be trusted: writes the hypothesis, picks one primary metric and the guardrails, computes sample size and run time, specifies how visitors are assigned and when exposure is logged, and reads out the result with a confidence interval. Use when someone says "set up an A/B test", "split test this page", "how many visitors do I need", "how long should the experiment run", "is this result significant", "can I stop the test early", or wants to test a headline, price, layout or onboarding change against the current version.

日本語の概要は準備中です。原文の説明を表示しています。

TerminalSkills/skills1632026年10月4日 更新

ably

無料

Ably is a hosted realtime messaging service: clients publish and subscribe to named channels over WebSockets, see who is present, replay message history, and resume after a dropped connection. Use when a user asks to "add realtime updates", "push live notifications to the browser", "show who is online", "add a chat room with typing indicators", "publish from a serverless function", or "authenticate Ably clients without exposing the API key". Covers the ably 2.x JavaScript SDK (Realtime and REST), JWT token authentication, presence, history and rewind, batch publishing, and the @ably/chat 1.x SDK.

日本語の概要は準備中です。原文の説明を表示しています。

TerminalSkills/skills1632026年10月4日 更新

TerminalSkills のスキルをすべて見る

このスキルの問題を報告する