This section contains information about some of the key tools and resources that will help developers start building applications on Celo.

Quick Start Guides

View the Developer Code Examples page to get started using the Celo SDKs with guided coding exercises.

Tools

SDKs

• ​ContractKit​

  • Javascript package of Celo blockchain utilities

  • Manage connections to the Celo blockchain, accounts, send transactions, interact with smart contracts, etc.

  • A set of wrappers around the core protocol smart contracts to easily connect with contracts related to governance, validators, on-chain exchange, etc.

  • Includes web3.js​

• ​Celo Ethers.js Wrapper (experimental)

  • A minimal wrapper to make ethers.js compatible with the Celo network

• ​use-contractkit​

  • A Web3Modal-like experience that injects ContractKit into your web-based application. Supports a variety of different wallets, including but not limited to Valora, Ledger, Metamask (Celo compatible fork) and any WalletConnect compatible wallets

• ​DappKit​

  • Easily connect to the Valora wallet with your React Native mobile application

  • Valora manages user account, private keys and transaction signing, so you can focus on building your dapp

  • Learn more and see the code with the Dappkit truffle box​

• ​Python SDK​

• ​Java SDK​

Infrastructure

• ​Valora provides a clean, intuitive UI where users can send transactions and interact with smart contracts

• ​Forno​

  • Node access service so you can connect your dapp to the Celo blockchain without having to run node infrastructure

• ​ODIS​

  • Oblivious decentralized identity service

  • Lightweight identity layer that makes it easy to send cryptocurrency to a phone number

• Blockscout block explorers

  • ​Alfajores testnet & mainnet​

• ​Stats.celo.org to check network activity and health

Networks

• ​Alfajores Testnet​

  • ​Faucet for free testnet CELO and cUSD

  • ​Forno supports connections to alfajores

  • Requires Alfajores Celo wallet for mobile device testing (please request, [email protected])

• ​Baklava testnet for validators and testing protocol changes

Ethereum Tools

• Similarities between Celo and Ethereum means you can use many of the most popular Ethereum developer tools.

  • Celo supports the EVM, so tools for writing smart contracts in Solidity (or any language that compiles to EVM bytecode) are compatible with Celo

  • ERC20, NFT (ERC721) and other smart contract interface standards are supported, see Celo for Ethereum Developers​

  • ​Truffle​

  • ​OpenZeppelin​

  • ​Remix​

  • Many more

Ongoing projects

• ​Community projects​

• ​Grant recipients​

• Web wallets

  • ​celowallet.app​

  • ​Celo Terminal​

Community

• Join our Discord​

• ​Discourse Forum​