I have seen the following transaction:


And I've seen that the gas price is 0. How could I do the same? When I use web3 it says that transaction is underpriced, however if this guy has sent tokens at gasPrice 0 it must be possible. I've seen that some pools do accept transactions with gas price 0.

Do you know how I could send the tokens without setting a gas price? Is there a specific client that may allow me to do this?

I am aware of the implications of not setting a gas price, the transaction may not get mined and such. I just want to know how this can be done.

1 Answer 1


As you said, zero gas price transactions are totally valid but might take a looong time (eternity?) to mine. It seems at least Mist allows zero gas price transactions: Can I set the gas price to whatever I want?

In theory any client could allow it, but probably it's not supported in some clients due to not making much sense.

Upon googling I also stumbled upon a partially relevant, but interesting rant about zero gas price txs: https://www.reddit.com/r/ethereum/comments/7lx1do/a_christmas_mystery_sweepers_and_zero_gas_price/

P.S. The tx you linked has other txs with the same nonce and at least some of them have gas price above zero. But difficult to say of course what the user has tried to accomplish.

  • It's weird that the other transactions got dropped and this one got mined, isn't it?
    – Victor
    Commented Feb 13, 2018 at 7:52
  • could it be what is described in that reddit thread? this is blowing my mind, I can't fully grasp what's going on and how I could replicate this behavior
    – Victor
    Commented Feb 13, 2018 at 8:07
  • Sounds like something similar to the Reddit post. So, that's one option for what happened. Someone decided (for whatever reason) to mine a tx which gave them zero profits. Commented Feb 13, 2018 at 9:39
  • What if in testnet using POA like Kovan? Will transaction with 0 gas price go through?
    – Richard Fu
    Commented Jul 11, 2018 at 6:53
  • Sorry, I'm not very familiar with POA networks. Here's some info I found: ethereum.stackexchange.com/questions/47793/… Commented Jul 11, 2018 at 6:58

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