Etherscan verification fails when using library

Environment information

• brownie Version: v1.17.0
• solc Version: 0.8.9
• Python Version: 3.9
• OS: linux

pragma solidity 0.8.9;

library MerkleLib {

    function verifyProof(bytes32 root, bytes32 leaf, bytes32[] memory proof) public pure returns (bool) {
        bytes32 currentHash = leaf;

        for (uint i = 0; i < proof.length; i += 1) {
            currentHash = parentHash(currentHash, proof[i]);
        }

        return currentHash == root;
    }

    function parentHash(bytes32 a, bytes32 b) public pure returns (bytes32) {
        if (a < b) {
            return keccak256(abi.encode(a, b));
        } else {
            return keccak256(abi.encode(b, a));
        }
    }

}

contract Test {
    using MerkleLib for bytes32;

    constructor() {
        bytes32 root = bytes32(0);
        bytes32 leaf = bytes32(0);
        bytes32[] memory proof = new bytes32[](1);
        root.verifyProof(leaf, proof);
    }
}

This code compiles and runs. However, if I try to publish_source, it fails. Commenting out the verifyProof line allows it to be published. I believe this is not related to the recent flattener update, as this issue was on earlier versions of brownie as well.

[skellet0r]

ah ok I see, just verified myself and the culprit is unlinked libraries. Just will require properly adding the below to the standard json input sent to etherscan

    "libraries": {
      // The top level key is the the name of the source file where the library is used.
      // If remappings are used, this source file should match the global path
      // after remappings were applied.
      // If this key is an empty string, that refers to a global level.
      "myFile.sol": {
        "MyLib": "0x123123..."
      }

[skellet0r]

Odd, if you have a repo I could test against I can dig a little deeper to see what other layers are missing.