How could I decode the input data of a transaction?

Question

I'm using web3j in java to get the input data of a transaction. I can get the data, but the problem is how can I decode this data.

Input data: "0x070ec83b000000000000000000000000000000000000000000000000000000000000016000000000000000000000000000000000000000000000000000000000015118f200000000000000000000000000000000000000000000000000000000000001a000000000000000000000000000000000000000000000000000000000000001e00000000000000000000000000000000000000000000000000.........."

String inputdata = null;

Optional<Transaction> tx = web3.ethGetTransactionByHash(txHash).send().getTransaction();

if (tx.isPresent()) {
    inputdata = tx.get().getInput();
}

//DECODE

byte[] bytes = Hex.decodeHex(inputdata.substring(2).toCharArray());
System.out.println(new String(bytes, "UTF-8"));

When you execute the code what you get is a variety of characters.

output

Perhaps the encoding is wrong. Try others, like US-ASCII. Namely, try this System.out.println(new String(bytes, "US-ASCII")) — Willy Wonka, Jan 09 '19 at 15:21
I did it as your suggestion and I get this "È;`Qò à ` à ` 1juan12.456.123-9Inacap45.566.963-8 odontologo0xasdasetcdasdaetc120920198232358" :/ — Nicolas Flores Muñoz, Jan 10 '19 at 23:15

score 0 · Answer 1 · answered Nov 04 '21 at 19:12

0

I'm not savvy with nodeJS but here's how to do it in python in case.

txn = web3.eth.get_transaction(txHash)                                  
txnInput = routerContract.decode_function_input(txn.input) 
print(txnInput)

answered Nov 04 '21 at 19:12

BJonas88

283
4
15

web3js does not have that function – darren z Jan 05 '22 at 19:11

How could I decode the input data of a transaction?

1 Answers1