Cronos EVM Docs
  • Getting Started
    • Getting Started
    • Background
    • Architecture
    • Cronos roadmap
  • FOR USERS
    • 💳Crypto.com Card Top Up
    • 🔥Crypto Wallets
    • 🦊MetaMask Configuration
    • 🦁Brave Wallet
    • 🌉Bridges
      • From the Crypto.com App and Exchange
        • From the Crypto.com App
        • From the Crypto.com Exchange
      • IBC (Cronos POS Chain, other Cosmos chains)
        • Cronos Bridge Web App
      • Independent bridges
      • FAQs for Bridge transfers
      • FAQs for transactions from/to centralized exchanges
    • 🚰Testnet Faucet
    • 💡Tips & FAQs
    • 👮Key Principles for Wallet Security
    • GasTracker
  • FOR DAPP DEVELOPERS
    • 💡Founder FAQs
    • 🏅Hacker's Getting Started Resources
    • 📃Smart Contracts
      • Contract Development on Testnet
      • Contract Deployment and Verification
      • Contract Verification Export: Cronoscan To Cronos Explorer
      • Best Practices
      • Token Contract Addresses
    • 💻dApp Creation
      • Free and commercial RPC endpoints
      • Wallet integrations
      • Web3-wallet
      • JSON-RPC methods
      • Address Conversion
      • Swagger Playground
    • ⚙️Dev Tools & Integrations
      • All dev tools & integrations
      • Account Abstraction (Experimental)
      • Band Protocol
      • Banxa
      • GoldRush
      • Cronos Safe
      • Flair
      • Google Bigquery
      • Moralis
      • Pyth
      • Secret Network
      • SubQuery
      • Witnet
    • Crypto.com AI Agent SDK
  • FOR NODE HOSTS
    • Running nodes
      • Cronos Mainnet
        • Quicksync
        • State-sync
        • Public Node Sync
        • KSYNC
        • The "Huygen" upgrade guide (v0.6.* to v0.7.*)
        • The "v0.7.0-hotfix" upgrade guide (v0.7.* to v0.8.*)
        • The "Galileo" upgrade guide (v0.8.* to v1.0.*)
        • The "Titan" upgrade guide (v1.0.* to v1.1.0)
        • The "v1.2" upgrade guide (v1.1.* to v1.2.0)
        • The "v1.3" upgrade guide (v1.2.* to v1.3.0)
        • The "v1.4" Pallene upgrade guide (v1.3.* to v1.4.1)
        • Patching Unlucky & Duplicate Tx
      • Cronos Testnet
      • Devnet
      • Best Practices
      • Cronosd build with Nix
      • VersionDB
      • MemIAVL
      • Local State Sync
    • Cronosd
  • CRONOS PLAY
    • Introduction
    • Unity Engine
      • Current Version
      • Legacy Version
        • EVM
        • Login Example
        • Custom RPC
        • ERC20
        • ERC721
        • ERC1155
      • Useful Links
    • Unreal Engine
      • Installation and Enabling
      • Working with Blueprint
        • Actors and Blueprint Classes
        • Cronos Configuration
        • Connect Defi Desktop/Onchain Wallet with URI
        • Connect Wallets with QR Code
        • Connect WalletConnect Step by Step
        • WalletConnect 2.0 and Unreal Engine 5: Hello World Example
        • Wallet
        • ERC20
        • ERC721
        • ERC1155
        • Broadcast Transactions
        • Get Tokens or Transactions
      • Working with C++
        • Creating a C++ Project
        • Creating a child DefiWalletCoreActor
        • Querying a contract
        • Customizing Network
      • Demo
    • Cronos Play C++ SDK
    • Crypto.com Pay Integration
    • Cronos Play FAQ
  • Block Explorers
    • Block Explorer and API Keys
    • Cronos Explorer
    • Cronoscan
  • CRONOS CHAIN PROTOCOL
    • Chain ID and Address Format
    • Cronos General FAQ
    • Genesis
    • Modules
      • module_bank
      • module_distribution
      • module_slashing
      • module_feemarket
    • Chain Details
      • List of parameters
      • Technical glossary
      • Protocol Documentation
    • Common IBC Commands
  • Cronos zkEVM
    • Cronos zkEVM
  • Resources
    • Media / brand kit
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  1. CRONOS CHAIN PROTOCOL

Cronos General FAQ

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Last updated 1 year ago

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What is the difference between Cronos Chain and Cronos POS Chain?

  • 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.

  • Cronos POS Chain is another Cosmos SDK chain that 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 Cronos POS Chain). On Cronos POS Chain, 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.

Who is currently running as a validator on Cronos?

Cronos uses Proof of Authority (POA) consensus, a streamlined and scalable consensus mechanism derived from the Tendermint POS consensus.

There are currently 33 validators supporting the Cronos network, all leading infrastructure providers (see the ).

How can I become a Cronos validator?

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.

What is the chain-ID for Cronos Mainnet?

  • Ethereum Chain ID: 25

  • Cosmos Chain ID: cronosmainnet_25-1

What are the rate limits of the free JSON-RPC EVM endpoint for Cronos?

  • 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 for assistance.

If I increase the gas price, does it help to speed up my transaction?

Is there a bug bounty?

Yes. The current mempool setting works in a , where transaction prioritization happens based on the gas price or priority fee.

Yes, with HackenProof:

list here
Discord
priority gas fee manner
https://hackenproof.com/cronos