Developer Resources & Tools

For assistance or questions please visit the GC discord channel.
General Information
Block Size
Block Speed
Gas price
Patchset
Native token
Network ID
30M Gas
5 sec
~1.22 GWei at baseline. Can rise with high usage (1559)
London
xDai
100
Blockchain Explorer
1) BlockScout is the official blockchain explorer for the Gnosis Chain. With this full-featured, open-source explorer you can view transactions, accounts & balances, access data via the API, and read and verify smart contracts.
👉 https://blockscout.com/xdai/mainnet​
2) AnyBlock Analytics Explorer is convenient for exploring recent transactions and blocks and locating common information quickly.
👉 https://explorer.anyblock.tools/ethereum/poa/xdai/​
JSON RPC endpoints
Main RPC is a load balancer with 4 nodes, health checks, and failover.
Resource
URL
JSON RPC endpoint(s)
​https://rpc.gnosischain.com

3rd party
​✔
recommended https://rpc.ankr.com/gnosis​

✔
​https://gnosischain-rpc.gateway.pokt.network/

WebSockets WSS endpoint
wss://rpc.gnosischain.com/wss
Additional resources to connect to Gnosis Chain
Resource
URL
Network ID hex
Network ID (Decimal, Hexadecimal)
100
0x64
🚀 QuikNode supports GC. Devs can get their own custom endpoint for DApps or other needs. https://blog.quiknode.io/xdai-network-is-live-on-quiknode/​
​⚓
 Ankr offers API endpoint access available with a free tier up to 100K requests/day. Additional paid tiers are available for developers. https://www.ankr.com/​
​⏹
 GetBlock.io provides fast and easy API connection services to a GC archive node. Both free and paid levels available. https://getblock.io/nodes/stake​
​🌎
 AnyBlock Analytics provides a JSON-RPC professional service for users. As GC validators, they have a deep understanding of the network as well as the broader Ethereum ecosystem. https://www.anyblockanalytics.com/json-rpc​
​⏩
 Pocket decentralized infrastructure, 1-click endpoints and monitoring. https://www.portal.pokt.network. Learn more about their multi-chain infrastructure.
​💣
Blast infrastructure and dashboard for generating dedicated Gnosis Chain API endpoints. Learn more here.
JSON-RPC Method Info
Eth Wiki: https://eth.wiki/json-rpc/API​
Postman: https://documenter.getpostman.com/view/4117254/ethereum-json-rpc/RVu7CT5J?version=latest​
BlockScout info
GraphQL: https://blockscout.com/poa/xdai/graphiql​
RPC: https://blockscout.com/xdai/mainnet/api-docs​
Eth RPC: https://blockscout.com/xdai/mainnet/eth-rpc-api-docs​
If using eth_getLogsto pull logs frequently WebSockets are recommended to push new logs as available.
Gas Price Oracle
Gas Price Oracle: https://blockscout.com/xdai/mainnet/api/v1/gas-price-oracle​
​More info & params​
POSDAO Contracts
POSDAO consensus is implemented in Solidity. Proxy contracts should be read for values such as Random Numbers generated by the protocol. 
​✅
 List of current POSDAO contracts​
TokenBridge
There are two bridge implementations connecting GC and the Ethereum Mainnet.
****xDai Bridge: ERC20-to-Native TokenBridge implementation, used for transferring Dai <-> xDai between Ethereum and the Gnosis Chain.
****ETH-GC Arbitrary Message Bridge: AMB between Ethereum and GC for data, token and message transfers. Includes the Ominibridge application for transfer of any ERC20 cross-chain.
xDai Bridge Access
xDai Bridge UI at https://bridge.gnosischain.com/​
Interaction using method calls for smart contracts ​https://docs.tokenbridge.net/xdai-bridge/how-to-use-xdai-bridge-without-ui​
Bridge UI is built-in into AlphaWallet, BurnerWallet, BurnerFactory and other applications.
OmniBridge Access
Omnibridge is located at https://omni.gnosischain.com/. More information including method calls here.​
Compatible Testnets
​POA Sokol Testnet is updated with similar specifications and runs the Nethermind Client.
DApp Management & Developer Tools
See the dropdown menu under Developer Resources and Tools for tutorials related to many of these tools.
​Biconomy allows for gasless transactions and improved DApp UX.
​Gas Station Network supports Gnosis Chain for Ethless Transactions.
​TheGraph supports data indexing, querying and display.
​CurveGrid MultiBaas provides smart contract deployment, interaction and updating capabilities through a web UI as well as a comprehensive REST API.
​3Box:  Externally Owned Account (EOA) addresses are the same on GC as they are on other EVM networks, so no changes are needed to implement 3box functionality.
​Blocknative supports real-time notification & transaction monitoring and mempool streaming with API and SDK tools.
​Sourcify Smart Contract Source Verification. Contracts can also be verified with BlockScout.​
​Ethers.js lightweight javascript library - can be used as an alternative to web3.js for simple application development.
​Remix IDE:  It's easy to deploy to GC with Remix, simply choose injected web3 and add the GC custom RPC to your metamask.
​OpenZeppelin Defender: Manage smart contract administration including access controls, upgrades, and pausing. Works with Gnosis Safe Multisig.
​Chainlink: Price Feeds integration. 
​Brownie: Smart Contract Development tool suite. For a video overview of Brownie Features, see this tutorial series by the Curve Finance team.
​Gelato: Automate smart contract executions with a decentralized network of bots.
​Gnosis Safe: Multisig management
​Etherspot: Smart wallet SDK with multi-chain compatibility.
Dashboards & Monitoring
​Dune Analytics: Dune supports data queries and custom dashboards. Visualize and compare data between contracts and chains (GC and Ethereum support). Existing Dashboards:
​Staking Dashboard​
​Chain Usage Dashboard​
​Tenderly dashboard supports transaction inspection - smart contracts can also be pushed to the dashboard for real-time monitoring.
​Chainbeat provides monitoring and analytics tools for DApp developers.
​Dappquery analytics dashboard, customizable visualizations, smart contract alerts and scalable GraphQL API.
Token Faucets
Faucets for xDai transactions
Faucet #1 - xDai, Optimism and Arbitrum on GC faucets​
Faucet #2 - Stakely xDai Faucet​
Test Token Faucets
​Token faucet allows you to easily create ERC20 FAU tokens for testing purposes.
​Weenus ERC20 is also available to use for testing purposes.
Tenderly Dashboard Gas Profiler example
Additional Resources
General Migration Guide: Published prior to the rebrand, this is a fun and easy xDai migration guide from DAOHaus: https://medium.com/daohaus-club/daohaus-xdai-dapp-migration-83dca1fc590a​
GasRelay tutorial by Portis. With a few lines of code, gas fees are shifted to DApp owners rather than users, creating an intuitive user experience.
https://docs.portis.io/#/gas-relay​
Chain spec files and known bootnodes of the GC network
https://github.com/poanetwork/poa-chain-spec/tree/dai​
Netstats, an overview of GC Chain nodes http://dai-netstat.poa.network​
Anyblock Index (aka http://eth.events), so you can query it via the Elasticsearch API or search in PostgreSQL: https://account.anyblock.tools/status/​
Gnosis Safe on GC.​
Airdrops: Resources for creating airdrops on GC.