Hardhat ABI Exporter

Export Ethereum smart contract ABIs on compilation via Hardhat.

Versions of this plugin prior to 2.0.0 were released as buidler-abi-exporter.

Installation

npm install --save-dev hardhat-abi-exporter
# or
yarn add --dev hardhat-abi-exporter

Usage

Load plugin in Hardhat config:

require('hardhat-abi-exporter');

Add configuration under the abiExporter key:

| option | description | default | | -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------ | | path | path to ABI export directory (relative to Hardhat root) | './abi' | | runOnCompile | whether to automatically export ABIs during compilation | false | | clear | whether to delete old ABI files in path on compilation and on clean | false | | flat | whether to flatten output directory (may cause name collisions) | false | | only | Array of String matchers used to select included contracts, defaults to all contracts if length is 0 | [] | | except | Array of String matchers used to exclude contracts | [] | | spacing | number of spaces per indentation level of formatted output | 2 | | pretty | whether to use interface-style formatting of output for better readability | false | | format | format type ("json", "minimal", "fullName"). Alternative to pretty | json | | filter | Function with signature (abiElement: any, index: number, abi: any, fullyQualifiedName: string) => boolean used to filter elements from each exported ABI | () => true | | rename | Function with signature (sourceName: string, contractName: string) => string used to rename an exported ABI (incompatible with flat option) | undefined |

Note that the configuration formatted as either a single Object, or an Array of objects. An Array may be used to specify multiple outputs.

abiExporter: {
  path: './data/abi',
  runOnCompile: true,
  clear: true,
  flat: true,
  only: [':ERC20$'],
  spacing: 2,
  pretty: true,
  format: "minimal",
}

// or

abiExporter: [
  {
    path: './abi/pretty',
    pretty: true,
  },
  {
    path: './abi/ugly',
    pretty: false,
  },
]

// or

abiExporter: [
  {
    path: './abi/json',
    format: "json",
  },
  {
    path: './abi/minimal',
    format: "minimal",
  },
  {
    path: './abi/fullName',
    format: "fullName",
  },
]

The included Hardhat tasks may be run manually:

npx hardhat export-abi
npx hardhat clear-abi
# or
yarn run hardhat export-abi
yarn run hardhat clear-abi

By default, the hardhat compile task is run before exporting ABIs. This behavior can be disabled with the --no-compile flag:

npx hardhat export-abi --no-compile
# or
yarn run hardhat export-abi --no-compile

The path directory will be created if it does not exist.

The clear option is set to false by default because it represents a destructive action, but should be set to true in most cases.

ABIs files are saved in the format [CONTRACT_NAME].json.

Development

Install dependencies via Yarn:

yarn install

Setup Husky to format code on commit:

yarn prepare