Developer Resources

General information and links

General Information

POA Core

Block Size	Block Speed	Gas price	Patchset	Native token	Network ID
~17,000,000 Gas	5 sec	1 -10 GWei	Berlin	POA	99

To mitigate an ongoing denial-of-service attack, validators decided to increase the gas price to a range between 1-10 Gwei. Each validator can determine their own value within this range.

POA Sokol (Testnet)

Block Size	Block Speed	Gas price	Patchset	Native token	Network ID
~17,000,000 Gas	5 sec	1 GWei	Berlin	SPOA	77

Note: Sokol validators run the Nethermind client only.

Sokol Faucets

• Sokol Testnet Faucet: https://faucet.poa.network Get free 100 SPOA tokens for testing on the Sokol testnet

• ERC20 Test Token Faucet Can be used on Sokol or POA Core.

Blockchain Explorers

POA Core

BlockScout is the official blockchain explorer for the POA Network. With this full-featured, open-source explorer you can view transactions, accounts & balances, access data via the API and read and verify smart contracts.

• POA Core Network: https://blockscout.com/poa/core

2) AnyBlock Analytics Explorer is convenient for exploring recent transactions and blocks and locating basic information extremely quickly.

• Poa Core Network: https://explorer.anyblock.tools/ethereum/poa/core/

Sokol Testnet

BlockScout is the official blockchain explorer for the POA Network. With this full-featured, open-source explorer you can view transactions, accounts & balances, access data via the API and read and verify smart contracts.

• Sokol Testnet: https://blockscout.com/poa/sokol

2) AnyBlock Analytics Explorer is convenient for exploring recent transactions and blocks and locating basic information extremely quickly.

• Sokol Testnet: https://explorer.anyblock.tools/ethereum/poa/sokol

JSON RPC endpoints

There are endpoints provided by POA. They are used to connect to the network. Use these endpoints to connect with DApps or when connecting to the POA Network with MetaMask or other web3 wallets.

POA Core

POA Core Network	​
Main RPC (HTTP2)	​https://core.poa.network/
WebSockets	wss://core.poa.network/wss
Archive node (last 100k blocks)	https://core-archive.blockscout.com/
Network ID	99

Sokol Testnet

POA Sokol Testnet
Main RPC (HTTPS)	https://sokol.poa.network
WebSockets (Secure)	wss://sokol.poa.network/wss
Archive node (last 100k blocks)	http://sokol-archive.blockscout.com/
Network ID	77

Kovan Testnet

Kovan Testnet
Main RPC (HTTPS)	https://kovan.poa.network/
WebSockets	wss://kovan.poa.network/wss
Network ID	42

On-Chain Randomness Contract (RandomAuRa)

POA Core

Block	Date	Contract
14350721	03/31/2020	0x67e90a54AeEA85f21949c645082FE95d77BC1E70

POA Sokol (Testnet)

Block	Date	Contract
13391641	02/20/2020	0x8f2b78169B0970F11a762e56659Db52B59CBCf1B

The current implementation requires a chain running OpenEthereum or Nethermind AuRa consensus. The Random Number generation contract was introduced in this PR.

TokenBridge UI

TokenBridge UI at https://bridge.poa.net/

DApp Management & Developer Tools

• Pocket provides a decentralized API layer for DApp developers (IOS, Android & Web SDKs available) and blockchain users.
• TheGraph supports xDai data indexing, querying and display.
• AnyBlock Analytics provides ElasticSearch & SQL access
• Tenderly dashboard supports POA transaction inspection - smart contracts can also be pushed to the dashboard for real-time monitoring.

Tenderly Dashboard Gas Profiler example

Additional Resources

POA Mainnet

• Chain spec files and known bootnodes of the POA network https://github.com/poanetwork/poa-chain-spec/tree/core
• Netstats, an overview of POA Chain nodes https://core-netstat.poa.network
• DApps Deployed to POA: Partial list of deployed DApps along with statistics and links https://www.stateofthedapps.com/rankings/platform/po

Sokol Testnet

• Chain spec files and known bootnodes of the Sokol network
• Ethereum Networks Stats (Netstats) with a list of nodes on Sokol network. Nodes should have netstats agent installed to be listed in the netstats. https://sokol-netstat.poa.network
• Governance DApps: To use governance dapps please switch to Sokol network in your Nifty Wallet

  • Validators DApp: https://validators.poa.network/ In the DApp anyone can get information about validators of the Sokol network and their keys
  • Voting DApp: https://voting.poa.network/ In the DApp anyone can get information about governance decisions on the Sokol network.