Got Error when submitting an array of striing arrays in a function in Solidity

Question

Got this error message in Remix IDE : transact to Countriesy.storeABatchOfCountries errored: Error encoding arguments: SyntaxError: JSON.parse: unexpected character at line 1 column 39 of the JSON data

My Function is supposed to take an array of 10 array of 6 string and store them inside the countriesMap mapping.

Here is the function code :

  //Function to store a batch of a maximum 10 countries in the Contract at the same time...
  function storeABatchOfCountries(string[6][10] calldata countriesData)
    external
    isOwner
  {
    uint8 _countryCounter;
    for (uint256 i = 0; i < countriesData.length; i++) {
      countriesMap[countriesData[i][5]] = Country(
        countriesData[i][0],
        countriesData[i][1],
        countriesData[i][2],
        countriesData[i][3],
        countriesData[i][4],
        countriesData[i][5],
        true
      );
      _countryCounter++;
    }
    numberOfCountries = _countryCounter;
  }

And Here is the data I'm submitting to it:

[
    ["+376", "Europe", "Andorra", "Euro", unicode"🇦🇩", "AD"],
    ["+971", "Asia", "United Arab Emirates", "Dirham", unicode"🇦🇪", "AE"],
    ["+93", "Asia", "Afghanistan", "Afghani", unicode"🇦🇫", "AF"],
    [
      "+1268",
      "North America",
      "Antigua and Barbuda",
      "Dollar",
      unicode"🇦🇬",
      "AG"
    ],
    ["+1264", "North America", "Anguilla", "Dollar", unicode"🇦🇮", "AI"],
    ["+355", "Europe", "Albania", "Lek", unicode"🇦🇱", "AL"],
    ["+374", "Asia", "Armenia", "Dram", unicode"🇦🇲", "AM"],
    [
      "+599",
      "North America",
      "Netherlands Antilles",
      "Guilder",
      unicode"🇧🇶",
      "AN"
    ],
    ["+244", "Africa", "Angola", "Kwanza", unicode"🇦🇴", "AO"],
    ["+672", "Antarctica", "Antarctica", "", unicode"🇦🇶", "AQ"]
  ]

Answer 1

Remove unicode keyword from list items like unicode"??". Json parser can't encode unicode word. It works only inside solidity code.

As an example consider following contract:

contract Flags {
   string public flag = unicode"??";

   function setFlag(string memory _flag) public {
       flag = _flag;
   }
}

and following test case in brownie:

from brownie import accounts, Flags

def test_unicode_string_setup():
    contract = Flags.deploy({'from': accounts[0]})
    assert contract.flag() == "??"

    # no unicode keyword    
    contract.setFlag("??", {'from': accounts[0]})
    assert contract.flag() == "??"