DEV Community: BuildLabIG

BEP-20 Play-to-Earn en BNB Chain

BuildLabIG — Sat, 30 May 2026 23:56:57 +0000

Most Web3 tutorials show you how to deploy a token. Few show you how to build a game around it with real users playing and earning.
I built PlayMidas — a live Play-to-Earn game on BNB Chain with a BEP-20 token (MIDAS/MDS), Firebase auth, 4 minigames, wallet registration, and an admin panel. Then I packaged the entire foundation into a starter kit.
The stack

BEP-20 token on BNB Chain — verified on BSCScan
Solidity smart contract — 30M token supply
Firebase Auth — user authentication
Firestore — game state, scores, wallet registry
Vanilla JavaScript — frontend, no heavy framework
4 minigames — ready to extend or replace
Admin panel — manage users, balances, rewards

Why BNB Chain and not Ethereum?
Gas fees. Ethereum mainnet makes microtransactions in a game unviable. BNB Chain gives you EVM compatibility with fees low enough to actually reward players without burning the treasury.
What's inside
A verified BEP-20 smart contract ready to deploy, complete Firebase Auth and Firestore integration, 4 working minigames connected to the reward system, wallet registration flow so users link their BNB wallet to their game account, an admin panel to manage the economy, and full setup documentation.
The hardest part
Connecting Web2 (Firebase user accounts) with Web3 (on-chain wallets) cleanly. Users shouldn't need to understand blockchain to play — the starter kit abstracts this with a wallet registration flow that links Firebase UID to wallet address. Simple for the user, solid on the backend.
Who this is for

Web3 devs who want a working Play-to-Earn foundation without starting from zero
Developers building token-based games or reward systems
Anyone who wants a verified BEP-20 token with a real use case attached

Get it
PlayMidas is live at playmidas.xyz with real players and a verified contract on BSCScan.
👉 Get the starter kit on Gumroad — $19 USD
Custom development available: buildlabig@gmail.com

Web SaaS con Netlify Identity + MercadoPago + Stripe + Claude AI

BuildLabIG — Sat, 30 May 2026 23:55:53 +0000

I built ValorMercado.mx — a web SaaS tool currently live and used by professional appraisers in Mexico, with Netlify Identity auth, MercadoPago and Stripe payments, a credit system, and Claude AI integrated. Then I packaged the foundation into a starter kit.
The stack

Vanilla JavaScript + HTML/CSS — no framework bloat
Netlify Identity — auth without a backend
MercadoPago + Stripe — LATAM and international payments
PayPal — additional checkout option
Claude AI (Anthropic) — AI features via API
Credit system — users buy credits, spend credits

Why this stack?
Netlify Identity gives you auth with zero server cost. Combined with Netlify Functions for serverless backend logic, you can run a full SaaS with paying users and nearly zero operating cost. ValorMercado.mx runs this way in production today.
What's inside
Complete Netlify Identity auth flow with protected routes, MercadoPago and Stripe payment integration side by side, PayPal checkout option, a working credit system (buy credits, consume credits per action), Claude AI API integration ready to extend, and a clean project structure deployable to Netlify in minutes.
The part that took the most time
Getting three payment processors to coexist cleanly — each with their own webhook, their own success/failure callbacks, and all of them updating the same credit balance in the database. The starter kit has this logic already abstracted and working.
Who this is for

Devs who want to launch a SaaS fast without a heavy backend
Anyone integrating AI features with a credit/usage model
Developers targeting both LATAM (MercadoPago) and international (Stripe) users simultaneously

Get it
Live proof: ValorMercado.mx is running this stack with real paying users right now.
👉 Get the starter kit on Gumroad — $29 USD
Custom development available: buildlabig@gmail.com

I Built a Flutter App with Firebase + MercadoPago and Turned It Into a Starter Kit (Real Production Code)

BuildLabIG — Sat, 30 May 2026 23:50:19 +0000

Most Flutter tutorials show you how to build a todo app. This is not that.
I spent months building Valúa — a real Flutter app currently live on Google Play in Mexico, with paying customers, Firebase Auth, Firestore, and MercadoPago payments fully integrated. Then I packaged the entire foundation into a starter kit so other devs don't have to start from scratch.
Here's what I built, how it works, and why MercadoPago integration is harder than anyone tells you.
The stack

Flutter (Dart) — cross-platform mobile
Firebase Auth — email/password + Google Sign-In
Firestore — real-time database, user data persistence
MercadoPago — payment processing for LATAM (Mexico, Argentina, Brazil, Colombia)

Why MercadoPago and not Stripe?
If you're building for Latin America, this question answers itself. MercadoPago has 50M+ active users in LATAM, local payment methods (OXXO, bank transfer, credit/debit cards), and better conversion rates for Mexican and Argentine users than any international processor.
Stripe works great for USD. MercadoPago works for where your users actually are.
The problem? The Flutter + MercadoPago integration docs are scattered, incomplete, and half of them are outdated. I burned a lot of hours figuring it out. That's exactly what this starter kit solves.
What's inside
The kit includes complete Firebase Auth with email and Google Sign-In already configured, Firestore CRUD operations ready to use, MercadoPago Checkout Pro integration with deep link callbacks, and a clean folder structure ready to extend.
The part nobody tells you about is the deep links for payment callbacks. When MercadoPago redirects back to your app after payment, you need to handle it properly — miss this and your users complete payment but your app has no idea it happened. The starter kit has this already set up and working.
Who this is for

Flutter devs building for the Latin American market
Developers who want Firebase Auth + payments without setting it up from scratch
Anyone tired of integrating MercadoPago with incomplete docs

Get it
This is not a tutorial project. It's extracted from a real app with real paying users in production.
👉 Get the starter kit on Gumroad — $29 USD
If you want something fully custom built, reach out: buildlabig@gmail.com