Returns the number of transactions in a block matching the given block number.
// Request curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_getBlockTransactionCountByNumber","params":["0xe8"],"id":1}' http://klaytn.blockpi.network/v1/rpc/your-api-key // Result { "jsonrpc": "2.0", "id":1, "result": "0xa" // 10 }