where do struct names come from?

from internalType in the abi (solc includes it). abis without it get Tuple1, Tuple2… which still encode the same.

what input does it take?

a json abi, a whole foundry or hardhat artifact (the abi is pulled out of it), or human-readable lines like “function transfer(address to, uint256 amount) returns (bool)”.

ABI to interface

paste an abi, get a solidity interface with structs.

interface name

abijson abi, a foundry/hardhat artifact, or human-readable lines

[
  {
    "type": "function",
    "name": "balanceOf",
    "stateMutability": "view",
    "inputs": [
      {
        "name": "owner",
        "type": "address"
      }
    ],
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ]
  },
  {
    "type": "function",
    "name": "fill",
    "stateMutability": "payable",
    "inputs": [
      {
        "name": "order",
        "type": "tuple",
        "internalType": "struct Exchange.Order",
        "components": [
          {
            "name": "maker",
            "type": "address"
          },
          {
            "name": "amount",
            "type": "uint256"
          },
          {
            "name": "deadline",
            "type": "uint64"
          }
        ]
      },
      {
        "name": "signature",
        "type": "bytes"
      }
    ],
    "outputs": [
      {
        "name": "filled",
        "type": "uint256"
      }
    ]
  },
  {
    "type": "event",
    "name": "Filled",
    "anonymous": false,
    "inputs": [
      {
        "name": "maker",
        "type": "address",
        "indexed": true
      },
      {
        "name": "amount",
        "type": "uint256",
        "indexed": false
      }
    ]
  },
  {
    "type": "error",
    "name": "Expired",
    "inputs": [
      {
        "name": "deadline",
        "type": "uint64"
      }
    ]
  },
  {
    "type": "receive",
    "stateMutability": "payable"
  }
]

try

IExchange.sol

5 abi items · tap to copy

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IExchange {
    struct Order {
        address maker;
        uint256 amount;
        uint64 deadline;
    }

    event Filled(address indexed maker, uint256 amount);

    error Expired(uint64 deadline);

    function balanceOf(address owner) external view returns (uint256);
    function fill(Order calldata order, bytes calldata signature) external payable returns (uint256 filled);
    receive() external payable;
}

ABI to interface

IExchange.sol

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