Import a local library

Why use this example

Use this pattern to test contract composition, external calls, events, and return values inside one reproducible run. The entry isolates import a local library so its input, result, and state changes stay easy to compare.

Solidity to run

import "./MathLib.sol"
MathLib.double(21)

Included local files

Solidity REPL creates these files before compiling the main entry, so its imports resolve without additional setup.

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.20;

library MathLib {
  function double(uint256 value) internal pure returns (uint256) {
    return value * 2;
  }
}

What to expect

The local MathLib.sol file resolves through the import and MathLib.double(21) returns 42.

Continue the investigation

Change a value, add another expression, or open Inspect after the run. Accepted entries remain available to the next entry, and the clean replay keeps the complete result reproducible.