mirror of
https://github.com/monero-project/monero-site.git
synced 2024-11-05 16:07:36 +00:00
29 lines
1.7 KiB
Markdown
29 lines
1.7 KiB
Markdown
---
|
|
terms: ["payment-ID", "payment-IDs"]
|
|
summary: "an optional flag that is added to identify transactions to merchants, consisting of 64 hexadecimal characters"
|
|
---
|
|
|
|
{% include disclaimer.html translated="no" translationOutdated="no" %}
|
|
*Note:* Long Payment IDs have been removed since release 0.15; it's not possible to use them anymore. More info in the [blog post]({{ site.baseurl_root }}/2019/06/04/Long-Payment-ID-Deprecation.html) that announced their deprecation.
|
|
|
|
{% include disclaimer.html translated="no" translationOutdated="no" %}
|
|
### The Basics
|
|
|
|
Payment ID is an **arbitrary** and **optional** transaction attachment that consists of 32 bytes (64 hexadecimal characters) or 8 bytes (in the case of integrated addresses).
|
|
|
|
The Payment ID is usually used to identify transactions to merchants and exchanges: Given the intrinsic privacy features built into Monero, where a single public address is usually used for incoming transactions, the Payment ID is especially useful to tie incoming payments with user accounts.
|
|
|
|
### Compact Payment IDs and Integrated Addresses
|
|
|
|
Since the 0.9 Hydrogen Helix version, Payment IDs can be encrypted and embedded in a payment address. The Payment IDs of this type should be 64-bits and are encrypted with a random one-time key known only to the sender and receiver.
|
|
|
|
### Creating a Payment ID
|
|
It is recommended to use the official wallet's `integrated_address` command to automatically generate Integrated Addresses that contain Compact Payment IDs. If you want to use the command line, you can generate Payment IDs as follows:
|
|
|
|
Creating a compact Payment ID for an Integrated Address:
|
|
|
|
```# openssl rand -hex 8```
|
|
|
|
Creating an old-style Payment ID:
|
|
|
|
```# openssl rand -hex 32```
|