cast-interface.md

cast interface

NAME

cast-interface - Generate a Solidity interface from a given ABI.

SYNOPSIS

cast interface [options] address_or_path

DESCRIPTION

Generates a Solidity interface from a given ABI.

The argument (address_or_path) can either be the path to a file containing an ABI, or an address.

If an address is provided, then the interface is generated from the ABI of the account, which is fetched from Etherscan.

ℹ️ Note

This command does not currently support ABI encoder v2.

OPTIONS

Interface Options

-n name
--name name
    The name to use for the generated interface. The default name is Interface.

-o path
    The path to the output file. If not specified, the interface will be output to stdout.

-p version
--pragma version
    The Solidity pragma version to use in the interface. Default: ^0.8.10.

-j
--json
    Output the contract's JSON ABI.

{{#include ../common/etherscan-options.md}}

{{#include common-options.md}}

EXAMPLES

1. Generate an interface from a file:

   cast interface ./path/to/abi.json

2. Generate an interface using Etherscan:

   cast interface -o IWETH.sol 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

3. Generate and name an interface from a file:

   cast interface -n LilENS ./path/to/abi.json

4. Fetch the JSON ABI of a contract on Etherscan:

   cast interface -o IWETH.sol -j 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

SEE ALSO

cast, cast proof