Should I use getTransactionCount() result in sendTransaction()?

Question

As I read, getTransactionCount() returns the number of transactions sent from an address. Which of below items should I consider?

Not to use returned nonce?
Use the returned nonce number as a parameter in sendTransaction() to avoid duplicate transactions?
Use the returned nonce number + 1 to avoid duplicate transactions?

score 1 · Accepted Answer · answered Mar 28 '20 at 17:00

In order to avoid the problem of double-spending, each transaction is sent with a nonce.

What is a nonce?

A nonce is an integer value that represents the number of transactions that have been performed from an account (ethereum adddress).

Which of the below items should I consider?

You should not use this, as some transaction with this nonce has already been submitted to the network.

Use the returned nonce number as a parameter in sendTransaction() to avoid duplicate transactions?

No, the reason is same as that of point 1

Yes

This is wrong! Nonce start at zero. You have to use the value that getTransactionCount returns. — Ismael, Apr 04 '20 at 17:33

score 0 · Answer 2 · answered Mar 28 '20 at 18:41

0

Use the returned nonce number + 1 to avoid duplicate transactions

answered Mar 28 '20 at 18:41

Mr_Mo

Provide a bit of explanation about the answer, always. – balajipachai Mar 29 '20 at 08:58
This is wrong! Nonce start at zero. You have to use the value that getTransactionCount returns. – Ismael Mar 31 '20 at 03:56

2 Answers2