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Can you please double-check this command for me and tell me if I screwed up the units?

eth.sendTransaction({ from: "blah", to: "blah", value:20000000000000000, nonce:5, gas:120000, gasPrice:80000000000 })

I had a little panic attack afterward about whether I was supposed to put gasPrice in wei or gwei. I checked the documentation and it says wei, but nevertheless I'd like the peace of mind of a second set of eyes.

If one screws it up and puts in a ridiculously high gas price beyond the available funds, will that burn up all of what's remaining in the account before it fails?

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You can use web3.toWei to easily convert amounts to wei from other units

eth.sendTransaction({
    from: "blah",
    to: "blah",
    value: web3.toWei(0.02, "ether"),
    nonce: 5,
    gas: 120000,
    gasPrice: web3.toWei(80, "gwei")
});

Also useful is web.fromWei to convert from wei to other units

> web3.fromWei("80000000000", "gwei");
"80"
> web3.fromWei("20000000000000000", "ether");
"0.02"
  • Thanks; this is very helpful! So my values were reasonable? i.e. My gasPrice was 80 gwei and I was sending 0.02 eth? What happens if you screw up and use a ballistic gas price either within or outside the means of your account balance? Does anything protect you from a typo with extra zeroes recklessly burning through all your account funds? – rkagerer Sep 14 '17 at 4:02
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    Gas price is a dynamic value, sometime during a popular ICO the cost goes up. You can use ethgasstation.info to determine the convenient price at given moment, ie how much time can you wait for a transaction to be mined vs the price you want to pay. A good wallet can calculate the total of a transaction, but otherwise if you have enough funds there's nothing that can save you if you put too many zeros in the gas price. – Ismael Sep 14 '17 at 7:41
  • Thanks that answers my question. Ethgasstation.info was down at the time so I just looked at gas prices of recent transactions on Etherscan.io and added a nice fat margin. – rkagerer Sep 18 '17 at 14:31

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