handcash-mpp

This library implements the HandCash Machine Payments Protocol (MPP) to enable HTTP 402 challenge‑response payment flows on Bitcoin SV using HandCash.

It provides helpers for creating payment requests, handling hosted Pay and Connect Pay, issuing and verifying receipt JWTs, managing challenges, and verifying HandCash webhooks.

Designed to be used with @handcash/sdk, it supplies primitives such as issuePaymentRequiredWithHostedPay, connectPayAndIssueReceipt, and runMachinePaidHandler for building paid APIs.