class OpenAssets::Payload
the open assets payload
Attributes
metadata[RW]
quantities[RW]
Public Class Methods
new(quantities = [], metadata = '')
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# File lib/openassets/payload.rb, line 14 def initialize(quantities = [], metadata = '') @quantities = quantities @metadata = metadata end
parse_from_payload(payload)
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parse open assets payload @return [Payload] a open assets payload object, if payload is invalid, return nil.
# File lib/openassets/payload.rb, line 21 def self.parse_from_payload(payload) buf = StringIO.new(payload) marker = buf.read(2) version = buf.read(2) return nil if marker != MARKER || version != VERSION count = Bitcoin.unpack_var_int_from_io(buf) return nil unless count quantities = [] count.times do quantities << LEB128.decode_unsigned(buf, buf.pos) end metadata_length = Bitcoin.unpack_var_int_from_io(buf) return nil if metadata_length.nil? || buf.length < metadata_length + buf.pos metadata = buf.read(metadata_length).each_byte.map(&:chr).join new(quantities, metadata) rescue # LEB128#decode_unsigned raise 'undefined method `unpack' for nil:NilClass' # for invalid format such as "018f8f" (the most significant bit of the last byte should be 0) nil end
Public Instance Methods
to_payload()
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generate binary payload
# File lib/openassets/payload.rb, line 43 def to_payload payload = String.new payload << MARKER payload << VERSION payload << Bitcoin.pack_var_int(quantities.size) << quantities.map{|q| LEB128.encode_unsigned(q).read }.join payload << Bitcoin.pack_var_int(metadata.length) << metadata.bytes.map{|b| sprintf("%02x", b)}.join.htb payload end