PayString was previously known as PayID.
The reference PayString server is comprised of a simple Node.js HTTP server and a Postgres database.
In production environments, you should set up a reverse proxy like nginx in front of the Node.js HTTP server, as described at NGINX Reverse Proxy + SSL setup.
To run a PayString server in a production environment, you should:
- Give each component of the stack a vCPU and 500 MB of RAM
- Ensure there are at least two High-Availability replicas for each component
Here's how the requirements would break down:
- 1 vCPU + 500 MB RAM per nginx replica (2x)
- 1 vCPU + 500 MB RAM per PayString Node.js server replica (2x)
- 1 vCPU + 500 MB RAM per Postgres replica (2x)
Note that these are conservative requirements for an environment with a non-trivial amount of traffic. The PayString server is not resource-hungry. If you have an environment with smaller amounts of traffic, you may be able to run a PayString server with less robust specs.