Developer Resources & Tools

General Information and Links

For assistance or questions please visit the xDai discord channel.

General Information

Block Size

Block Speed

Gas price

Patchset

Native token

Network ID

17,000,000 Gas

5 sec

1 GWei

Berlin

xDai

100

Blockchain Explorer

1) BlockScout is the official blockchain explorer for the xDai 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

https://rpc.xdaichain.com/

(alternative) https://xdai.poanetwork.dev

WebSockets WSS endpoint

wss://rpc.xdaichain.com/wss

(alternative) wss://xdai.poanetwork.dev/wss

Additional resources to connect to xDai network

Resource

URL

JSON RPC endpoint over HTTP (non-secure)

http://xdai.poanetwork.dev

JSON RPC endpoint via Cloudflare

https://dai.poa.network

WebSockets WS (non-secure)

ws://xdai.poanetwork.dev:8546

Archive node

https://xdai-archive.blockscout.com

Network ID (Decimal, Hexadecimal)

100

0x64

🚀 QuikNode also supports xDai. 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 an xDai archive node. Both free and paid levels available. https://getblock.io/nodes/stake

🌎 AnyBlock Analytics provides a JSON-RPC professional service for users. As xDai 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.

JSON-RPC Method Info

If using eth_getLogsto pull logs frequently WebSockets are recommended to push new logs as available.

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 xDai and the Ethereum Mainnet.

****xDai Bridge: ERC20-to-Native TokenBridge implementation, used for transferring Dai <-> xDai between Ethereum and the xDai chain.

****ETH-xDai Arbitrary Message Bridge: AMB between Ethereum and xDai for data, token and message transfers. Includes the Ominibridge application for transfer of any ERC20 cross-chain.

xDai Bridge Access

OmniBridge Access

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.

  • TheGraph supports xDai 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 xDai 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 xDai with Remix, simply choose injected web3 and add the xDai custom RPC to your metamask.

  • OpenZeppelin Defender: Manage smart contract administration including access controls, upgrades, and pausing. Works with Gnosis Safe Multisig.

  • Chainlink: xDai 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.

Dashboards & Monitoring

  • Dune Analytics: Dune supports xDai for data queries and custom dashboards. Visualize and compare data between contracts and chains (xDai and Ethereum support). Existing Dashboards:

  • Tenderly dashboard supports xDai 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

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