Class: BinaryCodec::STObject

Inherits:
SerializedType show all
Defined in:
lib/binary-codec/types/st_object.rb

Constant Summary collapse

OBJECT_END_MARKER_BYTE = 
[225]
OBJECT_END_MARKER = 
'ObjectEndMarker'.freeze
ST_OBJECT = 
'STObject'.freeze
DESTINATION = 
'Destination'.freeze
ACCOUNT = 
'Account'.freeze
SOURCE_TAG = 
'SourceTag'.freeze
DEST_TAG = 
'DestinationTag'.freeze

Instance Attribute Summary

Attributes inherited from SerializedType

#bytes

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from SerializedType

from_bytes, from_hex, from_json, get_type_by_name, #to_byte_sink, #to_bytes, #to_hex, #value_of

Constructor Details

#initialize(byte_buf = nil) ⇒ STObject

attr_reader :type, :bytes



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# File 'lib/binary-codec/types/st_object.rb', line 16

def initialize(byte_buf = nil)
  @bytes = byte_buf || Array.new(0)
end

Class Method Details

.check_for_duplicate_tags(obj1, obj2) ⇒ Object 



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# File 'lib/binary-codec/types/st_object.rb', line 184

def self.check_for_duplicate_tags(obj1, obj2)
  if obj1['SourceTag'] && obj2['SourceTag']
    raise 'Cannot have Account X-Address and SourceTag'
  end

  if obj1['DestinationTag'] && obj2['DestinationTag']
    raise 'Cannot have Destination X-Address and DestinationTag'
  end
end

.from(value, filter = nil, definitions = nil) ⇒ STObject

Creates a new STObject instance from a value.

Parameters:

  • value (STObject, String, Array<Integer>, Hash) —

    The value to convert.

  • filter (Proc, nil) (defaults to: nil) —

    Optional filter for fields.

  • definitions (Definitions, nil) (defaults to: nil) —

    Optional definitions.

Returns:



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# File 'lib/binary-codec/types/st_object.rb', line 25

def self.from(value, filter = nil, definitions = nil)
  return value if value.is_a?(STObject)
  definitions ||= Definitions.instance

  if value.is_a?(String)
    return STObject.new(hex_to_bytes(value))
  end

  if value.is_a?(Array)
    return STObject.new(value)
  end

  list = BytesList.new
  serializer = BinarySerializer.new(list)
  is_unl_modify = false

  # Use ::Hash explicitly to avoid shadowing by BinaryCodec::Hash
  unless value.is_a?(::Hash)
    raise StandardError, "STObject.from expects a Hash, got #{value.class}"
  end

  # Handle X-Addresses and check for duplicate tags
  processed_value = value.each_with_object({}) do |(key, val), acc|
    if val && val.is_a?(String) && AddressCodec::AddressCodec.new.valid_x_address?(val)
      handled = handle_x_address(key.to_s, val)
      check_for_duplicate_tags(handled, value)
      acc.merge!(handled)
    else
      acc[key.to_s] = val
    end
  end

  # Multisign special case: SigningPubKey should be empty if not provided or explicitly empty
  if processed_value['TransactionType'] && !processed_value.key?('SigningPubKey') && !processed_value.key?('TxnSignature')
     # This is an unsigned transaction, let's NOT add SigningPubKey yet.
     # Wait, xrpl.js adds it as empty when signing.
  end

  sorted_fields = processed_value.keys.map do |field_name|
    field = definitions.get_field_instance(field_name)
    raise "Field #{field_name} is not defined" if field.nil?
    field
  end.select(&:is_serialized).sort_by(&:ordinal)

  if filter
    sorted_fields = sorted_fields.select { |f| filter.call(f.name) }
  end

  sorted_fields.each do |field|
    associated_value = processed_value[field.name]
    next if associated_value.nil?

    # Special handling for SigningPubKey = "" during multisign
    # If the field is SigningPubKey and the value is "", it SHOULD still be serialized.
    # But wait, is_serialized for Blob (SigningPubKey) might be false if empty?
    # Actually, for SigningPubKey = "", it's 2 bytes: 73 (type 7 field 3) and 00 (length 0).
    
    # Special handling for UNLModify
    if field.name == 'UNLModify' # This might need more specific check depending on value
       is_unl_modify = true
    end
    is_unl_modify_workaround = (field.name == 'Account' && is_unl_modify)

    serializer.write_field_and_value(field, associated_value, is_unl_modify_workaround)
  end

  STObject.new(list.to_bytes)
end

.from_parser(parser, size_hint = nil) ⇒ STObject

Construct a STObject from a BinaryParser

Parameters:

  • parser (BinaryParser) —

    BinaryParser to read STObject from

  • size_hint (Integer) (defaults to: nil) —

    Optional size hint for the object

Returns:



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# File 'lib/binary-codec/types/st_object.rb', line 99

def self.from_parser(parser, size_hint = nil)
  list = BytesList.new
  bytes = BinarySerializer.new(list)

  until parser.end?
    begin
      field = parser.read_field
      break if field.name == OBJECT_END_MARKER

      associated_value = parser.read_field_value(field)

      bytes.write_field_and_value(field, associated_value)
      bytes.put(OBJECT_END_MARKER_BYTE) if field.type == ST_OBJECT
    rescue => e
      # If we fail to read a field (e.g. unknown header), we might have hit 
      # the end of the object without an end marker, or just malformed data.
      break
    end
  end

  STObject.new(list.to_bytes)
end

Instance Method Details

#to_json(_definitions = nil, _field_name = nil) ⇒ String

Method to get the JSON interpretation of self.bytes

Returns:

  • (String) —

    A stringified JSON object



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# File 'lib/binary-codec/types/st_object.rb', line 125

def to_json(_definitions = nil, _field_name = nil)
  definitions = _definitions || Definitions.instance
  parser = BinaryParser.new(to_hex)
  accumulator = {}

  until parser.end?
    begin
      # Check if we are at the end marker (0xE1) or if peek fails
      break if parser.peek == 0xE1
      
      field = parser.read_field
      break if field.name == 'ObjectEndMarker' # Break if the object end marker is reached
      
      # Special case: Blob fields might be empty (encoded as 0x00 length)
      if field.type == 'Blob' && !parser.end? && parser.peek == 0
        parser.read(1) # consume 0x00
        value = ""
      else
        value_obj = parser.read_field_value(field)
        value = value_obj.to_json(definitions, field.name)
        
        # Re-parse if it's a nested structure to keep it as a Hash/Array in the accumulator
        if field.type == 'STObject' || field.type == 'Amount' || field.type == 'STArray'
          value = JSON.parse(value) if value.is_a?(String)
        end
      end
      accumulator[field.name] = value
    rescue => e
      break
    end
  end

  # Existing tests expect a JSON string for STObject#to_json
  # To satisfy spec/binary-codec/types/st_object_spec.rb:10
  JSON.generate(accumulator)
end