// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.6.12;

contract MapMyAddress {
    mapping(address => bool) public mapped;
    
    event Mapped(address sender, string cardanoAddress);
    
    function mapAddress(string memory cardanoAddress) external {
        require(!mapped[msg.sender],"Already mapped");
        mapped[msg.sender] = true;
        emit Mapped(msg.sender,cardanoAddress);
    }
}

{
  "compilationTarget": {
    "contracts/MapMyAddress.sol": "MapMyAddress"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}