Update Hardhat tutorial to ethers v6 API#615
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The examples use ethers v5 API (`contract.deployed()`, `contract.address`), but `@nomicfoundation/hardhat-toolbox` ships with ethers v6. Copy-pasting causes tests and deployment to fail with `TypeError: contract.deployed is not a function`. Also, `hardhat.config.js` calls `require("dotenv")`, but dotenv is not installed in the dependency setup step.
Fixes:
- Added `dotenv` to the `npm install` command
- `await contract.deployed()` > `await contract.waitForDeployment()`
- `contract.address` > `await contract.getAddress()`
**Result:** The tutorial now matches the current Hardhat Toolbox, users can run setup, tests, and deployment without API fixes.
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The examples use ethers v5 API (
contract.deployed(),contract.address), but@nomicfoundation/hardhat-toolboxships with ethers v6. Copy-pasting causes tests and deployment to fail withTypeError: contract.deployed is not a function. Also,hardhat.config.jscallsrequire("dotenv"), but dotenv is not installed in the dependency setup step.Fixes:
dotenvto thenpm installcommandawait contract.deployed()>await contract.waitForDeployment()contract.address>await contract.getAddress()Result: The tutorial now matches the current Hardhat Toolbox, users can run setup, tests, and deployment without API fixes.