Cronos General FAQ
- Cronos is an EVM-compatible (Ethereum Virtual Machine) chain powered by Ethermint, built on the Cosmos SDK, which allows rapid porting of apps and smart contracts from Ethereum and EVM-compatible chains. On Cronos, users pay transaction fees in the $CRO cryptocurrency.
- Crypto.org Chain is another Cosmos SDK chain which is primarily used for $CRO staking and as the backbone behind many Crypto.com applications. It aims to provide a fast transaction experience. (Croeseid Testnet is the testnet of Crypto.org Chain). On Crypto.org, users also pay transaction fees in the $CRO cryptocurrency.
If you are an application developer who is creating smart contracts in Solidity and would like to deploy decentralized applications in a permissionless environment, Cronos is suitable for your needs.
Cronos uses Proof of Authority (POA) consensus, a streamlined and scalable consensus mechanism derived from the Tendermint POS consensus.
There are currently 27 validators supporting the Cronos network, all leading infrastructure providers (see the list here).
Cronos validators are by invitation only at the moment. Application for new Cronos validators are not currently open. We will make an announcement once applications re-open.
- Ethereum Chain ID:
25 - Cosmos Chain ID:
cronosmainnet_25-1
- Cronos Mainnet: rate limit is 300 req/min/IP
- Cronos Testnet: rate limit of 500 req/min/IP
If the limit is exceeded, the IP gets blocked for 1 minute. If you are expecting to consistently make more requests than what limits allow, you may consider setting up your own full node or contacting a commercial JSON-RPC endpoint provider (see Dev Tools & Integrations). You can also reach out to us on Discord for assistance.
The current mempool setting works on a first-come-first-serve manner. The Cronos network does not yet support transaction prioritization using gas price or priority fee.