blockchain-express-middleware

Blockchain.info receive payments API express middleware

Express middleware for receiving bitcoin payments using blockchain.info payments receiving API without any fees.

• Generates unique payment addresses for each transaction using HD wallet.
• Displays payment request QR code with custom message.
• Provides payment state.
• Keeps track of state transitions.
• Supports multiple transactions to a single address.
• Supports underpayment and overpayment (amount state).
• Provides a working example express server application.
• Requires Blockchain.info receive API key and extended public key (xPub).
• Written in TypeScript, no need for extra typings.

Installation

This package is distributed via npm

npm install blockchain-express-middleware

Configuration

The example application requires API key (see this) and extended public key to work.

To set these, create a ".env" file in the project root directory with contents like:

SERVER_PORT=3000
SERVER_USE_SSL=false
SERVER_CERT=fullchain.pem
SERVER_KEY=privkey.pem

API_KEY=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
XPUB=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

APP_SECRET=XWzk3tMcPw8JTGfjZzDHdPKguAhh2Adw
APP_REQUIRED_CONFIRMATIONS=4

Commands

• yarn start to start the example application.
• yarn build to build the production version.
• yarn test to run tests.
• yarn coverage to gather code coverage.
• yarn lint to lint the codebase.
• yarn prettier to run prettier.
• yarn audit to run all pre-commit checks (prettier, build, lint, test)