Shieldz API Lets Developers Add Non-Custodial Crypto Payments in Minutes

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Shieldz has published a quickstart guide for its crypto payment API, aimed at developers who want to accept cryptocurrency directly into their own wallets without a third party holding funds. The integration involves three core steps: generating an invoice via a REST API call, redirecting the customer to a hosted checkout page, and verifying a signed webhook to confirm payment. Merchants settle in a single chosen token while customers can pay using Bitcoin, Ethereum, USDC, USDT, Zcash, and others. The platform charges no fees and offers official SDKs for Node, Python, Rust, and PHP, as well as an MCP server for AI agent use. Developers can test the full payment flow using a sandbox key and a simulate-payment tool before going live with real funds.

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Engineer builds DIY mmWave radar system for material classification

A developer named Gauthier Lechevalier has built a millimeter-wave (mmWave) radar system capable of classifying different materials. The project is documented on his personal website, where he shares technical details of the build. mmWave radar operates at high frequencies and can detect material properties beyond simple motion or distance sensing. The project has garnered attention on Hacker News, reflecting growing hobbyist interest in advanced radar technology.

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ProgrammingDEV Community ·

Developer Guide: Implementing Role-Based Access Control in Go with SQL

A software developer has published a technical walkthrough detailing how to build a role-based access control (RBAC) system using Go and SQL. The tutorial models a blog platform where three user roles — viewer, editor, and admin — are granted distinct permissions over post-related operations. The implementation relies on a relational database schema with linked tables for roles, permissions, users, and posts to manage access rules. The guide covers database migrations, entity setup, authorization logic, and route configuration for a working RBAC system. As a bonus, the tutorial also demonstrates adding an in-memory cache to reduce repeated database lookups when validating user permissions.

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ProgrammingDEV Community ·

Seven AI Coding Tools Ranked on End-to-End App Development Capabilities in 2026

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ProgrammingDEV Community ·

Developer Tests 7 Hyped AI Coding Tools: 4 Saved Time, 3 Did Not

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