Error encoding arguments: Error: invalid bytes32 value (arg="", coderType="bytes32", value="0x6c", version=4.0.37) >

Question

pragma solidity ^0.4.20;

contract TestBytes32ToString{
    function bytes32ToString(bytes32 x) public pure returns(uint,uint,uint,string memory){
        bytes memory bytesString = new bytes(32);
        uint charCount = 0;
        for(uint i = 0; i < 32; i++){
            byte char = byte(bytes32(uint(x)*2**(8*i)));
            if(char != 0){
                  bytesString[charCount] = char;
                  charCount++;
            }
        }

        bytes memory bytesStringTrimmed = new bytes(charCount);
        for(i = 0; i < charCount; i++){
            bytesStringTrimmed[i] = bytesString[i];
        }
        return (uint(x),uint(x)*2**(8*0),uint(x)*2**(8*1),string(bytesStringTrimmed));
    }
}

When I execute the above code in the new layout of remix，I input "0x6c",then an error had occurred as follws:

Error encoding arguments: Error: invalid bytes32 value (arg="", coderType="bytes32", value="0x6c", version=4.0.37) 

But I did the same operation in the previous version of remix, it works.

Answer 1

That's because the value has to be 32 bytes long in the new layout, like:

0x6c00000000000000000000000000000000000000000000000000000000000000

From remix-ide github:

if you specify bytes32, then the value has to be 32 bytes long. If you don't mean that, you could use a shorter length, the types string or bytes.

Duplicated issue with the same question here.

Answer 2

Most of the time we try to provide string but it will be byte32 in following format. // 'ETH' as a bytes32 string '0x4554480000000000000000000000000000000000000000000000000000000000'

Do not forget to remove single cote at the time of input.