core/lib/forge-std/src/StdJson.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
pragma experimental ABIEncoderV2;

import "./Vm.sol";

// Helpers for parsing keys into types.
library stdJson {

    Vm private constant vm = Vm(address(uint160(uint256(keccak256("hevm cheat code")))));

    function parseRaw(string memory json, string memory key)
        internal
        returns (bytes memory)
    {
        return vm.parseJson(json, key);
    }

    function readUint(string memory json, string memory key)
        internal
        returns (uint256)
    {
        return abi.decode(vm.parseJson(json, key), (uint256));
    }

    function readUintArray(string memory json, string memory key)
        internal
        returns (uint256[] memory)
    {
        return abi.decode(vm.parseJson(json, key), (uint256[]));
    }

    function readInt(string memory json, string memory key)
        internal
        returns (int256)
    {
        return abi.decode(vm.parseJson(json, key), (int256));
    }

    function readIntArray(string memory json, string memory key)
        internal
        returns (int256[] memory)
    {
        return abi.decode(vm.parseJson(json, key), (int256[]));
    }

    function readBytes32(string memory json, string memory key)
        internal
        returns (bytes32)
    {
        return abi.decode(vm.parseJson(json, key), (bytes32));
    }

    function readBytes32Array(string memory json, string memory key)
        internal
        returns (bytes32[] memory)
    {
        return abi.decode(vm.parseJson(json, key), (bytes32[]));
    }

    function readString(string memory json, string memory key)
        internal
        returns (string memory)
    {
        return abi.decode(vm.parseJson(json, key), (string));
    }

    function readStringArray(string memory json, string memory key)
        internal
        returns (string[] memory)
    {
        return abi.decode(vm.parseJson(json, key), (string[]));
    }

    function readAddress(string memory json, string memory key)
        internal
        returns (address)
    {
        return abi.decode(vm.parseJson(json, key), (address));
    }

    function readAddressArray(string memory json, string memory key)
        internal
        returns (address[] memory)
    {
        return abi.decode(vm.parseJson(json, key), (address[]));
    }

    function readBool(string memory json, string memory key)
        internal
        returns (bool)
    {
        return abi.decode(vm.parseJson(json, key), (bool));
    }

    function readBoolArray(string memory json, string memory key)
        internal
        returns (bool[] memory)
    {
        return abi.decode(vm.parseJson(json, key), (bool[]));
    }

    function readBytes(string memory json, string memory key)
        internal
        returns (bytes memory)
    {
        return abi.decode(vm.parseJson(json, key), (bytes));
    }

    function readBytesArray(string memory json, string memory key)
        internal
        returns (bytes[] memory)
    {
        return abi.decode(vm.parseJson(json, key), (bytes[]));
    }


}