Live Playground

Interactive code examples you can edit and run directly in your browser.

Examples run against Conflux eSpace Testnet (chainId: 71). Sandpack runs inside a remote sandbox and cannot reach localhost, so only public RPC endpoints are supported.

Available examples

@cfxdevkit/core

EspaceClient — Connect EspaceClient, check connectivity, read block number, gas price, and block details
Balances — Query native CFX and ERC-20 token balances
ERC-20 Token Info — Batch-read token metadata with ERC20_ABI and client.publicClient.readContract

@cfxdevkit/wallet

HD Wallet / Mnemonic — Generate mnemonics, validate phrases, and derive HD wallet accounts (eSpace + Core addresses)

@cfxdevkit/contracts

Contract ABIs — Explore bundled ERC-20/ERC-721/ERC-1155 ABIs and live-read a testnet token
Deploy ERC-20 — Deploy a token using erc20BaseAbi + erc20BaseBytecode via wallet.deployContract