feat: implement get_cells_capacity api

Author: shaojunda

lib/ckb/indexer/api.rb

@@ -15,6 +15,11 @@ def get_cells(search_key:, order: "asc", limit: DEFAULT_LIMIT, after_cursor: nil
         result = rpc.get_cells(search_key.to_h, order, Utils.to_hex(limit), after_cursor)
         CKB::Indexer::Types::LiveCells.from_h(result)
       end
+
+      def get_cells_capacity(search_key)
+        result = rpc.get_cells_capacity(search_key.to_h)
+        CKB::Indexer::Types::CellsCapacity.from_h(result)
+      end
     end
   end
 end

lib/ckb/indexer/types/cells_capacity.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+module CKB
+	module Indexer
+		module Types
+			class CellsCapacity
+				attr_reader :block_number, :block_hash, :capacity
+
+				# @param block_number [String | Integer] integer or hex number
+				# @param block_hash [String]
+				# @param capacity [String | Integer]
+				def initialize(capacity:, block_number:, block_hash:)
+					@capacity = Utils.to_int(capacity)
+					@block_hash = block_hash
+					@block_number = Utils.to_int(block_number)
+				end
+
+				def self.from_h(hash)
+					return if hash.nil?
+
+					new(
+						capacity:  hash[:capacity],
+						block_hash:  hash[:block_hash],
+						block_number: hash[:block_number]
+					)
+				end
+
+				def to_h
+					{
+						capacity: Utils.to_hex(capacity),
+						block_hash: block_hash,
+						block_number: block_number
+					}
+				end
+			end
+		end
+	end
+end

lib/ckb/indexer/types/types.rb

@@ -4,6 +4,7 @@
 require_relative "live_cell"
 require_relative "live_cells"
 require_relative "search_key_filter"
+require_relative "cells_capacity"
 
 module CKB
   module Indexer