Deploy to testnet

app/controllers/api/v1/block_transactions_controller.rb

@@ -7,7 +7,7 @@ def show
         block = Block.find_by!(block_hash: params[:id])
         ckb_transactions = block.ckb_transactions.
           select(:id, :tx_hash, :block_id, :block_number, :block_timestamp, :is_cellbase, :updated_at).
-          order(:id)
+          order(is_cellbase: :desc, id: :asc)
 
         if params[:tx_hash].present?
           ckb_transactions = ckb_transactions.where(tx_hash: params[:tx_hash])

test/controllers/api/v1/block_transactions_controller_test.rb

@@ -339,6 +339,19 @@ class BlockTransactionsControllerTest < ActionDispatch::IntegrationTest
         assert_equal response_transaction, response.body
         assert_equal 1, json.dig("meta", "total")
       end
+
+      test "first tx should be cellbase" do
+        page = 1
+        page_size = 10
+        block = create(:block, :with_block_hash)
+        _ckb_transaction = create(:ckb_transaction, :with_multiple_inputs_and_outputs, block: block)
+        _cellbase_ckb_transaction = create(:ckb_transaction, block: block, is_cellbase: true)
+
+        valid_get api_v1_block_transaction_url(block.block_hash), params: {
+          page: page, page_size: page_size }
+
+        assert_equal true, json.dig("data").first["attributes"]["is_cellbase"]
+      end
     end
   end
 end