Resources for Developers

Reference documentation

ZKsync documentation: https://docs.zksync.io/build

Relevant Github repositories:

https://github.com/cronos-labs/cronos-zkevm
https://github.com/cronos-labs/era-contracts
https://github.com/zksync-sdk/zksync-ethers (Ethers library for Javascript)

Cronos zkEVM Mainnet URLs

Chain ID: 388
Token: zkCRO ("Cronos zkEVM CRO")
JSON RPC API (rate limited): https://mainnet.zkevm.cronos.org
WebSocket (rate limited): wss://ws.zkevm.cronos.org
Blockchain explorer: https://explorer.zkevm.cronos.org/
Gas price: The gas price of is currently fixed at 2500gwei
- This is subject to change and is expected to be dynamic in the next major release to be announced.
Developer portal: https://developers.zkevm.cronos.org/
Contract verification interface: https://explorer.zkevm.cronos.org/verifyContract
Bridge for ERC-20 tokens (Ethereum <=> Cronos zkEVM): https://zkevm.cronos.org/bridge

Cronos zkEVM Sepolia Testnet URLs

Chain ID: 240
Token: zkTCRO
JSON RPC API (rate limited): https://testnet.zkevm.cronos.org
WebSocket (rate limited): wss://ws.testnet.zkevm.cronos.org
Blockchain explorer: https://explorer.zkevm.cronos.org/testnet
- This is subject to change and is expected to be dynamic in the next major release to be announced.
Developer portal: https://developers.zkevm.cronos.org/
Contract verification interface: https://explorer.zkevm.cronos.org/testnet/verifyContract
zkTCRO faucet: https://zkevm.cronos.org/faucet
Demo project repository for smart contract developers
Testnet bridge for ERC-20 tokens (zkEVM testnet <=> Ethereum Sepolia): https://zkevm.cronos.org/bridge/testnet

Remix Plugin for zkEVM development

Remix users can leverage the zksync Remix plugin for their development. The plugin simplifies writing and deploying zkEVM smart contracts, making it accessible to both newcomers and experienced users. The plugin can be activated by searching with the keywords zksync

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Last updated 5 months ago