mirror of
https://github.com/monero-project/monero-site.git
synced 2024-12-24 04:29:34 +00:00
87 lines
3.1 KiB
Markdown
87 lines
3.1 KiB
Markdown
{% include disclaimer.html translated="no" translationOutdated="no" %}
|
|
|
|
### Prove payments
|
|
|
|
When you send money to a party who then disputes the payment was made, you need to be able to prove the payment was made.
|
|
|
|
With Bitcoin, this is typically done by looking up the transaction ID, where the origin and destination addresses are
|
|
shown, along with the amount transacted.
|
|
|
|
Monero, however, is private: that information is not available publicly on the blockchain. The steps are therefore a bit
|
|
more involved.
|
|
|
|
To prove to Charlie that she made a payment to Bob, Alice must supply Charlie three pieces of information:
|
|
|
|
- the transaction ID, as is done in Bitcoin
|
|
- Bob's address, as is done with Bitcoin
|
|
- the transaction's key, which is new with Monero and other CryptoNote currencies
|
|
|
|
When Alice made the transaction, a one time key was automatically generated just for this transaction.
|
|
|
|
#### CLI
|
|
|
|
Alice can query it thus in monero-wallet-cli (new name for the old simplewallet):
|
|
|
|
> get_tx_key TXID
|
|
|
|
Alice would plug in her actual transaction ID instead of this TXID placeholder. All being well, the one time transaction key
|
|
will be displayed.
|
|
|
|
Note that this will only work if monero-wallet-cli is set to save transaction keys. To double check:
|
|
|
|
> set
|
|
|
|
If it's set to 0, set it to 1:
|
|
|
|
> set store-tx-info 1
|
|
|
|
#### GUI
|
|
|
|
Alice can open her monero-wallet-gui and go to the history page to see her transaction detail:
|
|
|
|
|
|
|
|
Here, she can copy the transaction ID and Bob's address by clicking on each of them.
|
|
Then she can click on `P` to get a payment proof (transaction key):
|
|
|
|
|
|
|
|
|
|
---
|
|
|
|
Alice can now send Charlie the transaction key along with transaction ID and Bob's address.
|
|
|
|
Note: if several transactions were made, this needs repeating for each such transaction.
|
|
|
|
### Check payments
|
|
|
|
Charlie now received those three pieces of information, and wants to check Alice is telling the truth: on an up to date
|
|
blockchain,
|
|
|
|
#### CLI
|
|
|
|
Charlie types in monero-wallet-cli:
|
|
|
|
> check_tx_key TXID TXKEY ADDRESS
|
|
|
|
The information supplied by Alice plugs neatly instead of the placeholders. monero-wallet-cli will use the transaction
|
|
key to decode the transaction, and display how much this particular transaction sent to this address.
|
|
|
|
Obviously, Charlie will want to double check with Bob the address is really his - same as with Bitcoin.
|
|
|
|
#### GUI
|
|
|
|
Charlie will open his monero-wallet-gui and go to the Advanced > Prove/Check page to fill the Check section with the informations provided by Alice:
|
|
|
|
|
|
|
|
Then clicking on Check will tell Charlie how much this particular transaction sent to this address, and how much confirmation the transaction had:
|
|
|
|
|
|
|
|
|
|
---
|
|
|
|
Obviously, Charlie will want to double check with Bob the address is really his - same as with Bitcoin.
|
|
|
|
Note: if several transactions were made, this needs repeating for each such transaction.
|