Where is the encrypted Monero amounts in a transaction?

Question

Looking at a monero transaction, I can't see any amounts. Where is this encrypted exactly? Take for example: https://moneroblocks.info/tx/9adbcfa8fe9011c2451b9636d3b68312047e93ec4477bf894687fb182a93a4c2

I can see the fee was: 0.000161200000 XMR

But all the amounts are hidden. Where in the transaction data is this hidden?

score 2 · Accepted Answer · answered Mar 27 '20 at 20:30

The encrypted/masked amounts are stored in the tx ecdhInfo field.

If you want to view these masked amounts on an explorer:

Visit: https://xmrchain.net/tx/9adbcfa8fe9011c2451b9636d3b68312047e93ec4477bf894687fb182a93a4c2/1
Scroll to the bottom and click "Show JSON representation of tx".

If you want to view in a daemon:

print_tx 9adbcfa8fe9011c2451b9636d3b68312047e93ec4477bf894687fb182a93a4c2 +json
...
"ecdhInfo": [ {                                                                                              
    "amount": "5ba540ef53551f4b"                                                                                   }, {                                                                                                       
    "amount": "10779889c631fda5"                                                                             
  }],

its encrypted with the private view key and address? what is the function for such a thing if I wanted to decrypted it? — Patoshi パトシ, Mar 27 '20 at 20:58
Decryption is covered in this answer: https://monero.stackexchange.com/a/11684/7493 — jtgrassie, Mar 27 '20 at 22:08

Mogens TrasherDK · Answer 2 · 2020-03-27T23:24:48.807

1

You will need the address/subaddress and private view key to decode the amounts.

Go to xmrchain.net and fill in the missing address and viewkey.

Edit: Here's some light reading for deeper knowledge of Monero. Transaction structure is described in detail in Appendix A/B.

edited Mar 27 '20 at 23:24

answered Mar 27 '20 at 18:31

Mogens TrasherDK

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i dont have any of that. i'm just viewing the blockchain as an outsider. i want to know where the amount is hidden in the Trasaction data that is given to us. – Patoshi パトシ Mar 27 '20 at 19:59

Where is the encrypted Monero amounts in a transaction?

2 Answers2