mirror of
https://github.com/monero-project/monero-site.git
synced 2024-09-29 22:11:22 +00:00
25 lines
1.4 KiB
Markdown
25 lines
1.4 KiB
Markdown
---
|
|
layout: moneropedia
|
|
entry: "Payment ID"
|
|
terms: ["payment-ID", "payment-IDs"]
|
|
summary: "an optional flag that is added to identify transactions to merchants, consisting of 64 hexadecimal characters"
|
|
---
|
|
|
|
### 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 ID's and Integrated Addresses
|
|
|
|
Since the 0.9 Hydrogen Helix version, the Payment IDs can be encrypted and embedded in a payment address. The payment ID's 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 ID's. If you want to use the command line, you can generate Payment ID's 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```
|