eth_getUncleCountByBlockHash

The eth_getUncleCountByBlockHash method returns the number of uncles in a block from a block matching the given block hash. This lightweight method allows you to quickly check how many uncle blocks are referenced in a specific block without fetching the complete block data.

This method is useful for blockchain statistics, mining analysis, network health monitoring, and historical research. A high uncle count indicates network propagation issues or high mining competition. Note that uncle blocks only exist in Proof of Work Ethereum (pre-Merge, before September 2022), so recent blocks will always return 0x0. Each block can reference up to 2 uncle blocks maximum.

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