Documentation

Guides

Practical how-tos for testnet development across all major chains.

Deploy a smart contract with Remix IDE — no setup required

beginner

Use Remix IDE to write, compile and deploy a Solidity contract to Ethereum Sepolia directly from your browser — no Node.js, no CLI, no configuration.

solidity remix sepolia smart-contracts ethereum no-setup

Deploy your first smart contract on Sepolia with Hardhat

beginner

Step-by-step guide to writing, testing and deploying a Solidity smart contract to Ethereum Sepolia using Hardhat and ethers.js v6.

solidity hardhat sepolia smart-contracts ethereum

Build and deploy your first Solana program with Anchor

intermediate

Write, test and deploy a Solana on-chain program to Devnet using the Anchor framework — the standard toolkit for Solana development in Rust.

solana anchor rust devnet smart-contracts

Getting started with Bitcoin Signet

intermediate

Signet is the recommended Bitcoin testnet for serious development. Learn how to set it up with Bitcoin Core or a compatible wallet.

bitcoin signet bitcoin-core setup

How to connect MetaMask to a testnet

beginner

Step-by-step guide to adding Sepolia, Base Sepolia, Polygon Amoy and BNB Testnet to MetaMask.

metamask sepolia base polygon setup

Cross-chain deploy: same contract on Sepolia, Base and Polygon Amoy

intermediate

Deploy the same Solidity contract to three EVM testnets in one workflow using Foundry. Covers deterministic addresses with CREATE2 and multi-network verification.

solidity foundry sepolia base polygon cross-chain smart-contracts

Debug a failed transaction with cast

intermediate

How to diagnose and fix failed transactions on EVM testnets using Foundry's cast tool — decode revert reasons, simulate calls and trace execution.

foundry cast debugging transactions sepolia revert

Deploy a smart contract on Base Sepolia

beginner

Deploy and verify a Solidity contract on Base Sepolia using Foundry. Base is an Ethereum L2 by Coinbase — fast, cheap and EVM-compatible.

solidity foundry base base-sepolia smart-contracts l2

Deploy your first smart contract on Sepolia with Foundry

beginner

Step-by-step guide to writing, testing and deploying a Solidity smart contract to Ethereum Sepolia using Foundry — the fastest dev toolchain in 2026.

solidity foundry sepolia smart-contracts ethereum

How to fork a testnet locally with Foundry

intermediate

Use Foundry's fork mode to simulate Sepolia or Base Sepolia on your local machine — test against real state without spending testnet ETH.

foundry forking sepolia base testing local-development

How to get Sepolia ETH

beginner

The fastest ways to get Sepolia ETH in 2026 — faucets, requirements and what to do when they are rate-limited.

sepolia faucet ethereum getting-started