blockchainlab

54 blockchain & smart-contract interview questions with concise answers linked to runnable labs and tools: EVM, Solidity, DeFi, security, L2s, Solana. Built by Blockchain Lab (blockchainlab.com)

Default community health files (issue/PR templates, contributing, code of conduct, security policy) for all Blockchains repositories

26 free client-side blockchain dev tools: Safe multisig tx builder, EIP-712 signer, bridge fee compare, token approvals & revoke, Solana tx & Bitcoin PSBT decoders, MEV sandwich checker, gas, ABI, tx decoder, ENS…

54 runnable blockchain labs: 45 Solidity/Foundry (security, DeFi, MEV, governance, Yul), 4 Noir ZK and 4 Cairo/Starknet labs — all tested in CI

grokhack.com /forge composer: app idea -> Grok app repo under Blockchains with CI + Pages

Blockchain Lab /forge engine: plain-language idea -> composed, tested repo under Blockchains

Curated Grok / xAI integrations, forked under Blockchains, for grokhack.com

Tested starter templates built on Blockchains forks: Foundry+OpenZeppelin, Chainlink feeds, Uniswap v4 hook, ERC-4337 smart account + paymaster, Hedera HTS, wagmi+RainbowKit dApp, circom & Noir ZK

Live Blockchain Lab blocks for onetouchswitch.com (touch.grok.me): Chainlink GBP/USD, stablecoin payout rails, USDC payout cost in GBP, OFAC payout screening, healthy RPC, receipts. JS client + MCP + CORS JSON API.

Typed TypeScript + Python SDK for the Blockchain Lab Open Data API: 20 versioned datasets (stablecoins, yields, bridges, DEX volumes, L2BEAT, hacks, OFAC, RPC health, chains, EIPs). Types generated from JSON Schemas.

Forge-composed: An NFT membership collection with ERC-2981 royalties, role-based minting, a pause switch, and a paid mint priced in USD using a Chainlink ETH/USD price feed

Composed by Blockchain Lab Forge: ERC-4626 WETH savings vault valued in USD by Chainlink ETH/USD, with USD cap, entry fee and roles (OpenZeppelin v5.7.0 + chainlink-evm from Blockchains forks)

Memecoin safety + desk toolkit for memecoin.markets (memecoin.grok.me): Solana/EVM token safety scanner (mint/freeze, Token-2022, honeypot, tax, LP, holders), new-pair radar, UK CGT + FIFO PnL with rotki export, launch checklist, portfolio. Zero-dep SDK, MCP, static JSON API.

Forge-composed: A community governance token with permit approvals, vote delegation and an on-chain governor with a timelock

Curated 2026 blockchain developer roadmap: 12 stages, each linked to concept explainers, primary docs, runnable labs and free tools. Link-checked weekly. Built by Blockchain Lab (blockchainlab.com)

Composed by Blockchain Lab Forge: gasless membership NFTs with ERC-4337 smart accounts + sponsoring paymaster (eth-infinitism v0.9.0 + OpenZeppelin v5.7.0 from Blockchains forks)

Nightly upstream sync for the curated Blockchains forks (merge-upstream + tracking branches) - feeds blockchainlab-index and the Blockchain Lab forge

Public X intel, mentions and hackathon feeds for blockchainlab.com (public post IDs/links/summaries only)

Explain any Etherscan/Basescan/Arbiscan/Polygonscan tx or address in one click: bookmarklet + Chrome MV3 extension using Blockchain Lab Tools. Built by Blockchain Lab (blockchainlab.com)

Free static JSON API for blockchain builders: 20 versioned datasets — chains, DeFi TVL, stablecoins, yields, bridges, DEX volumes, fees, L2BEAT L2 metrics, hacks, OFAC addresses, RPC health, EIPs/BIPs. Typed SDKs.