1.1 KiB
| layout | entry | terms | summary | ||
|---|---|---|---|---|---|
| moneropedia | Payment ID |
|
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.
Creating a Payment ID
One can create a Payment ID quickly from the command line using OpenSSL:
# openssl rand 32 -hex
or
# openssl rand 8 -hex to get a PaymentID for an Integrated Address.