Unclear EVM Transaction Gas Cost definitions in Explorer

hashgraph / hedera-mirror-node-explorer

Hedera Mirror Node Explorer for the Hedera Hashgraph DLT.

Apache License 2.0

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Unclear EVM Transaction Gas Cost definitions in Explorer #1188

Open simsonraj opened 3 months ago

simsonraj commented 3 months ago

Problem

Unable to deduce exactly how much an EVM transaction cost, For example, https://hashscan.io/testnet/transaction/1720118323.274715003 this transaction

1. Does the charged fee, include the EVM transaction fee? But the payer address denotes it from the Relay node's address only
1. The EVM transaction Fee deducted from the User app, doesn't add up 1470 gwei * 400,000k gas = 0.588 HBAR, but the explorer shows 0.488 But this adds up in EIP1559 https://hashscan.io/testnet/transaction/1720527355.193472003 And I also think the Max Fee & priority fee are being displayed as tinybar, not gwei? but the GasPrice is displayed in HBAR

Solution

A better display of how much each account was charged for each type of transaction would clear this confusion, also keeping the EVM transaction costs similar to the other explorers in gwei standard

Alternatives

No response

svienot commented 3 months ago

Hi @simsonraj -- HashScan essentially displays data returned by the mirror-node but you are correct there are at least a few inconsistencies:

Max Fee Per Gas and Max Priority Fee Per Gas are indeed in tinybar whereas the other amounts are in hbar.
In the case of an Ethereum transaction, instead of displaying Payer Account we should probably display both 'Sender Account' and 'Relay Account'.

I am still trying to figure out exactly how to add up the fee data returned by mirror node. May I ask why you say they add up in the other (EIP1559) transaction you mention?

simsonraj commented 3 months ago

Hi @simsonraj -- HashScan essentially displays data returned by the mirror-node but you are correct there are at least a few inconsistencies:

Max Fee Per Gas and Max Priority Fee Per Gas are indeed in tinybar whereas the other amounts are in hbar.

In the case of an Ethereum transaction, instead of displaying Payer Account we should probably display both 'Sender Account' and 'Relay Account'.

I am still trying to figure out exactly how to add up the fee data returned by mirror node. May I ask why you say they add up in the other (EIP1559) transaction you mention?

Because for the EIP 1559 txn, 21,000 (gas Used) * 125(gasPrice, ignoring the tip fees) = 0.02625000 + 1 HBAR transfer value = 1.02625000HBAR from the sender wallet