Contract Deployment and Verification
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The Cronos blockchain network is transitioning away from the legacy Cronoscan block explorer and into the new .
The Cronos Explorer URLs are as follows:
Mainnet:
Testnet:
The documentation of the Cronos Explorer APIs are available at the following URLs:
Mainnet:
Testnet:
To interact with Cronos mainnet, you can use the public endpoint https:.//evm.cronos.org or an endpoint provided by a commercial vendor. You will need CRO in your self-custodial wallet in order to pay for transaction fees.
In , you will find a convenient example of Hardhat configuration for smart contract development on Cronos Testnet and Mainnet. Please refer to for a list of frequently used commands, and to the for more details.
In the hardhat.config.js file, you will notice that we currently recommend to set the gas price at 10100000000000 wei, but please for a more up to date value.
In order to enable users and fellow developers to do their own research, it is imperative that you publish your smart contract code on Cronos Explorer. This is called verifying your contracts.
The new Cronos Explorer supports smart contract verification either through the web interface or programmatically via Hardhat (we recommend to use Hardhat).
Contract Verification Via Explorer Hardhat:
After the contract verification is complete, the Cronos Explorer will display details about your smart contract code like shown below.
Contract Verification Via Explorer interface:
For verification via the web interface, visit the following URLs:
For verification via Hardhat, refer to the example provided in . Cronos is supported by Hardhat out of the box, you just need to configure the network parameters in hardhat.config.js . You will need an API key. To find out how to obtain an API key, refer to the .
Mainnet:
Testnet:
