chain_getBlock - Astar RPC Method
Retrieve block data by hash on Astar. Essential for accessing block headers and extrinsics on Polkadot's leading dApp hub supporting EVM, WASM, and upcoming PolkaVM environments.
Retrieves complete block information from Astar, including the block header, extrinsics, and justifications.
Why Astar? Build on Polkadot's leading dApp hub supporting EVM, WASM, and upcoming PolkaVM environments with EVM + WASM + PolkaVM support, Build2Earn developer rewards, dApp Staking, and Soneium cross-layer integration.
Use Cases
The chain_getBlock method is essential for:
- Block explorers - Display complete block information
- Chain analysis - Analyze block production patterns
- Transaction verification - Confirm extrinsic inclusion for cross-chain DeFi, multi-VM smart contracts, and XCM-enabled interoperability with Ethereum and Cosmos
- Data indexing - Build historical blockchain databases
Best Practices
- Cache block data by hash -- blocks are immutable once finalized on Substrate chains
- Use
chain_getBlockHashfirst to resolve block number to hash before calling this method - Handle
nullresults gracefully for non-existent blocks - Combine with
chain_getFinalizedHeadfor consensus-safe block retrieval
Code Examples
Related Methods
chain_getBlockHash- Get block hash by numberchain_getHeader- Get block header onlychain_getFinalizedHead- Get finalized block hash
Astar RPC Guide
Production-ready JSON-RPC guide for Astar Network, covering endpoints, network specs, integration patterns, and troubleshooting for builders targeting Polkadot parachain 2006.
chain_getBlockHash
Get block hash by number on Astar. Essential for converting block numbers to hashes, historical queries, and blockchain navigation on Polkadot's leading dApp hub supporting EVM, WASM, and upcoming PolkaVM environments.