Impost

Impost /ˈimˌpōst/ noun a tax or compulsory payment

Impost is a PoW anti-spam solution, or for short, a PoW captcha. Instead of spying on your users and using heavy captchas, Impost uses PoW to impose a cost on sending requests. To a single user, this is a negligable few seconds, but at scale, it can be a significant deterrent to spam.

This is the impost monorepo, containing the following packages:

• @impost/widget: A web component that can be used to embed an Impost widget in your website.
• @impost/lib: A library that can be used to generate, solve, and verify proofs.

It also contains a solver package, which is the PoW solver written in Zig, @impost/lib is built on top of, an example of how to use the solver in a nuxt 3 project.