I do this document because I’ve seen several options on the
internet of how to obtain the Revert Reason of a transaction and in
my case I found a simpler way and also that avoids the problem of
special characters that appear in the conversion:
public static String getRevertReason(String revertReason)
{String errorMethodId = "0x08c379a0"; //
Numeric.toHexString(Hash.sha3("Error(string)".getBytes())).subs
tring(0, 10)if (revertReason.startsWith(errorMethodId)) {return
hexToAscii(revertReason.substring(274)).trim();}return
"Transaction failed";}public static String hexToAscii(String
hexStr) {StringBuilder output = new StringBuilder("");for (int
i = 0; i < hexStr.length(); i += 2) {String str =
hexStr.substring(i, i + 2);output.append((char)
Integer.parseInt(str, 16));}return output.toString();}
According to solidity documentation, I’m removing the initial part
corresponding to:
• Function selector for Error
• Data offset
• String length
and I would only be keeping the part corresponding to the
hexadecimal of the message and for this part I only do a conversion
from hexadecimal string to ascii string.
Example test:
@Testpublic void reason() throws Exception {String revertReason
=
"0x08c379a00000000000000000000000000000000000000000000000000000
