Retrieving the original message from an ETH transaction
Retrieving the original message from an ETH transaction
Loading saved threads...
Fulco Prinssen · External communityPost link
External question — Ethereum Stack Exchange
Author: Fulco Prinssen
Original post: https://ethereum.stackexchange.com/questions/102308
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Adaptation: HTML converted to plain text; contact email addresses removed.
When someone is simply sending ETH from one address to another, and assuming that person does not include a custom message in the transaction, then what exactly is the message that is sent on the network used to sign the transaction?
When reading the basis of how message signing works, I found that the following method and formula is used:
sign(keccak256("\x19Ethereum Signed Message:\n" + len(message) + message)))
...but if the signer does not include a message and only sends ETH, or perhaps maybe just uses MetaMask to send funds, what exactly does the message become?
(Side note: Doing a transaction decode shows that "data" field is simply "0x," but not sure if this data field is also correlated to the message itself or not).
Quote
Report
Mikko Ohtamaa · External communityPost link
External answer — Ethereum Stack Exchange
Author: Mikko Ohtamaa
Original post: https://ethereum.stackexchange.com/a/102310
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Adaptation: HTML converted to plain text; contact email addresses removed.
All Ethereum transaction contains a
data
field. This field can be
Empty
A payload to call a smart contract function
Any user given message
The payload in the data field is separate for signing a message. A signed message can be transferred offchain, like email and copy paste, and does not need to be a part of a transaction.
Quote
Report
Post Reply
Quoted from Forex.com.bd-Editorial External question — Ethereum Stack Exchange Author: Fulco Prinssen Source score (net votes, not local likes): 0 Original post: https://ethereum.stackexchange.com/questions/102308 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. When someone is simply sending ETH from one address to another, and assuming that person does not include a custom message in the transaction, then what exactly is the message that is sent on the network used to sign the transaction? When reading the basis of how message signing works, I found that the following method and formula is used: sign(keccak256("\x19Ethereum Signed Message:\n" + len(message) + message))) ...but if the signer does not include a message and only sends ETH, or perhaps maybe just uses MetaMask to send funds, what exactly does the message become? (Side note: Doing a transaction decode shows that "data" field is simply "0x," but not sure if this data field is also correlated to the message itself or not).
Checking account access…