BuildBear is a platform for DApp development that provides private testnet sandboxes for EVM-compatible blockchains. The tutorial walks through creating a cross-chain bridge between Ethereum and Polygon sandboxes, implementing token swaps using Chainlink price feeds, deploying contracts with Foundry, verifying them with Sourcify, and building a Node.js relayer to handle cross-chain asset transfers. The guide covers sandbox setup, smart contract development, faucet usage, transaction debugging with Sentio, and end-to-end testing of bridging WETH and USDT tokens between chains.
Table of contents
Permalink Sign in to the BuildBear DashboardPermalink Create a SandboxPermalink FaucetPermalink Get ERC20 TokensPermalink Get Native TokensPermalink Plugins InstallationPermalink Contracts Verification APIPermalink BuildBear ExplorerPermalink Monitoring Transactions on BuildBear ExplorerPermalink Building a Cross-Chain Bridge with Node Relayer on BuildBearPermalink Project RepositoryPermalink Directory and Project StructurePermalink Create Sandboxes and Install PluginsPermalink Environment Variables & Wallet SetupPermalink Creating Contracts & ScriptsPermalink Configuring MakefilePermalink Install and BuildPermalink Deploy and VerifyPermalink Start the RelayerPermalink Interact and Bridge the AssetsPermalink Transaction Debugging with the Sentio PluginPermalink Destination: Release Tx202 Impressions