hardhat-task-gen

Overview

hardhat-task-gen is a Hardhat plugin that automatically generates tasks from ABI files. This allows you to easily interact with smart contracts without manually defining Hardhat tasks.

Features

• Auto-generates Hardhat tasks from contract ABIs
• Supports overloaded functions with numbered suffixes
• Allows configurable task prefixes
• Handles payable functions with optional parameters
• Provides clear CLI commands for contract interactions

Installation

npm install --save-dev @adisakboonmark/hardhat-task-gen

Usage

1. Add the plugin to your Hardhat config (hardhat.config.ts or hardhat.config.js):

import "@adisakboonmark/hardhat-task-gen";

// or

require("@adisakboonmark/hardhat-task-gen");

2. Run the task generation command:

$ npx hardhat task-gen

3. Use the generated tasks to interact with your contracts:

$ npx hardhat task-gen:MyERC20:transfer --contract-address 0x123...456 --to 0xabc...123 --amount 1000

$ npx hardhat task-gen:MyERC721:name --contract-address 0x123...456

$ npx hardhat task-gen:MyERC1155:balanceOfBatch --contract-address 0x123...456 --accounts '["0xabc...123","0xabc...456"]' --ids '[0,1]'

4. Run the helper command:

$ npx hardhat task-gen:MyERC1155:balanceOfBatch --help
Hardhat version 2.22.18

Usage: hardhat [GLOBAL OPTIONS] task-gen:MyERC1155:balanceOfBatch --accounts <STRING> [--contract-address <STRING>] --ids <STRING>

OPTIONS:

  --accounts            Parameter of type address[] (for tuple and array, provide a JSON string)
  --contract-address    The contract address
  --ids                 Parameter of type uint256[] (for tuple and array, provide a JSON string)

task-gen:MyERC1155:balanceOfBatch: Calls balanceOfBatch function on MyERC1155

For global options help run: hardhat help

Environment Variables

ABI Directory

The plugin reads ABI files from the directory specified by the environment variable:

process.env.ABI_DIRECTORY || "./artifacts/contracts/"

If ABI_DIRECTORY is not set, it defaults to ./artifacts/contracts/.

Default Contract Address

When executing a generated task, the contract address is determined using:

const contract = new hre.ethers.Contract(
  taskArgs.contractAddress || process.env.TASK_GEN_CONTRACT_ADDRESS,
  contractABI,
  signer
);

If TASK_GEN_CONTRACT_ADDRESS is not set, you must provide the contract address explicitly using --contract-address.

Configuration

You can customize the task generation by modifying your Hardhat config:

module.exports = {
  taskGen: {
    outPath: "./tasks-generated", // Specify the output path for generated tasks.
    clear: true, // Clear existing artifacts before generating the tasks, and it will force-run compilation. 
    runOnCompile: false, // Generate tasks automatically on each compile.
    prefix: "task-gen", // Set a custom task prefix.
  },
};

Example Overloaded Commands

For a contract named MyERC1155 with overloaded functions totalSupply() and totalSupply(uint256):

npx hardhat task-gen:MyERC1155:transfer:1         # Calls the totalSupply() function
npx hardhat task-gen:MyERC1155:transfer:2 --id 0  # Calls the totalSupply(uint256) function

Example Commands Document

Full Version Example Document

📜 Hardhat Contract Commands

AwesomeCat

Function Name	Parameters	Outputs	Command
breed	catA tuple[id (uint256),gender (uint8)], catB tuple[id (uint256),gender (uint8)]	newCat tuple[id (uint256),gender (uint8)]	npx hardhat task-gen:AwesomeCat:breed:1 --contract-address <contractAddress:optional> --cat-a <catA> --cat-b <catB>
breed	catIdA (uint256), catIdB (uint256)	newCat tuple[id (uint256),gender (uint8)]	npx hardhat task-gen:AwesomeCat:breed:2 --contract-address <contractAddress:optional> --cat-id-a <catIdA> --cat-id-b <catIdB>
breedBatch	catIdsA (uint256[]), catIdsB (uint256[])	newCats tuple[[id (uint256),gender (uint8)]]	npx hardhat task-gen:AwesomeCat:breedBatch:1 --contract-address <contractAddress:optional> --cat-ids-a <catIdsA> --cat-ids-b <catIdsB>
breedBatch	catsA tuple[[id (uint256),gender (uint8)]], catsB tuple[[id (uint256),gender (uint8)]]	newCats tuple[[id (uint256),gender (uint8)]]	npx hardhat task-gen:AwesomeCat:breedBatch:2 --contract-address <contractAddress:optional> --cats-a <catsA> --cats-b <catsB>
cats	catId (uint256)	id (uint256), gender (uint8)	npx hardhat task-gen:AwesomeCat:cats --contract-address <contractAddress:optional> --cat-id <catId>
craftGender		output1 (uint8)	npx hardhat task-gen:AwesomeCat:craftGender --contract-address <contractAddress:optional>
exists	catId (uint256)	output1 (bool)	npx hardhat task-gen:AwesomeCat:exists --contract-address <contractAddress:optional> --cat-id <catId>
mintCat		output1 tuple[id (uint256),gender (uint8)]	npx hardhat task-gen:AwesomeCat:mintCat --contract-address <contractAddress:optional>
owners	owner (address)	id (uint256), gender (uint8)	npx hardhat task-gen:AwesomeCat:owners --contract-address <contractAddress:optional> --owner <owner>
parents	catId (uint256)	father tuple[id (uint256),gender (uint8)], mother tuple[id (uint256),gender (uint8)]	npx hardhat task-gen:AwesomeCat:parents --contract-address <contractAddress:optional> --cat-id <catId>

IMPORTANT

Invalid Casing in Parameter Names (#HH208)

Problem:

Parameters like _type, _amount use underscores, which violate camelCase formatting.

Solution:

Fix this issue by removing underscores from all parameter names to ensure camelCase compliance.