Class: BTC::AssetMarker

Inherits:
Object
  • Object
show all
Includes:
Opcodes
Defined in:
lib/btcruby/open_assets/asset_marker.rb

Constant Summary collapse

MAGIC = 
"\x4f\x41".freeze
VERSION1 = 
"\x01\x00".freeze
PREFIX_V1 = 
MAGIC + VERSION1

Constants included from Opcodes

Opcodes::OPCODE_NAME_TO_VALUE, Opcodes::OPCODE_VALUE_TO_NAME, Opcodes::OP_0, Opcodes::OP_0NOTEQUAL, Opcodes::OP_1, Opcodes::OP_10, Opcodes::OP_11, Opcodes::OP_12, Opcodes::OP_13, Opcodes::OP_14, Opcodes::OP_15, Opcodes::OP_16, Opcodes::OP_1ADD, Opcodes::OP_1NEGATE, Opcodes::OP_1SUB, Opcodes::OP_2, Opcodes::OP_2DIV, Opcodes::OP_2DROP, Opcodes::OP_2DUP, Opcodes::OP_2MUL, Opcodes::OP_2OVER, Opcodes::OP_2ROT, Opcodes::OP_2SWAP, Opcodes::OP_3, Opcodes::OP_3DUP, Opcodes::OP_4, Opcodes::OP_5, Opcodes::OP_6, Opcodes::OP_7, Opcodes::OP_8, Opcodes::OP_9, Opcodes::OP_ABS, Opcodes::OP_ADD, Opcodes::OP_AND, Opcodes::OP_BOOLAND, Opcodes::OP_BOOLOR, Opcodes::OP_CAT, Opcodes::OP_CHECKLOCKTIMEVERIFY, Opcodes::OP_CHECKMULTISIG, Opcodes::OP_CHECKMULTISIGVERIFY, Opcodes::OP_CHECKSIG, Opcodes::OP_CHECKSIGVERIFY, Opcodes::OP_CODESEPARATOR, Opcodes::OP_DEPTH, Opcodes::OP_DIV, Opcodes::OP_DROP, Opcodes::OP_DUP, Opcodes::OP_ELSE, Opcodes::OP_ENDIF, Opcodes::OP_EQUAL, Opcodes::OP_EQUALVERIFY, Opcodes::OP_FALSE, Opcodes::OP_FROMALTSTACK, Opcodes::OP_GREATERTHAN, Opcodes::OP_GREATERTHANOREQUAL, Opcodes::OP_HASH160, Opcodes::OP_HASH256, Opcodes::OP_IF, Opcodes::OP_IFDUP, Opcodes::OP_INVALIDOPCODE, Opcodes::OP_INVERT, Opcodes::OP_LEFT, Opcodes::OP_LESSTHAN, Opcodes::OP_LESSTHANOREQUAL, Opcodes::OP_LSHIFT, Opcodes::OP_MAX, Opcodes::OP_MIN, Opcodes::OP_MOD, Opcodes::OP_MUL, Opcodes::OP_NEGATE, Opcodes::OP_NIP, Opcodes::OP_NOP, Opcodes::OP_NOP1, Opcodes::OP_NOP10, Opcodes::OP_NOP2, Opcodes::OP_NOP3, Opcodes::OP_NOP4, Opcodes::OP_NOP5, Opcodes::OP_NOP6, Opcodes::OP_NOP7, Opcodes::OP_NOP8, Opcodes::OP_NOP9, Opcodes::OP_NOT, Opcodes::OP_NOTIF, Opcodes::OP_NUMEQUAL, Opcodes::OP_NUMEQUALVERIFY, Opcodes::OP_NUMNOTEQUAL, Opcodes::OP_OR, Opcodes::OP_OVER, Opcodes::OP_PICK, Opcodes::OP_PUSHDATA1, Opcodes::OP_PUSHDATA2, Opcodes::OP_PUSHDATA4, Opcodes::OP_RESERVED, Opcodes::OP_RESERVED1, Opcodes::OP_RESERVED2, Opcodes::OP_RETURN, Opcodes::OP_RIGHT, Opcodes::OP_RIPEMD160, Opcodes::OP_ROLL, Opcodes::OP_ROT, Opcodes::OP_RSHIFT, Opcodes::OP_SHA1, Opcodes::OP_SHA256, Opcodes::OP_SIZE, Opcodes::OP_SUB, Opcodes::OP_SUBSTR, Opcodes::OP_SWAP, Opcodes::OP_TOALTSTACK, Opcodes::OP_TRUE, Opcodes::OP_TUCK, Opcodes::OP_VER, Opcodes::OP_VERIF, Opcodes::OP_VERIFY, Opcodes::OP_VERNOTIF, Opcodes::OP_WITHIN, Opcodes::OP_XOR

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(output: nil, script: nil, data: nil, quantities: nil, metadata: nil) ⇒ AssetMarker

Returns a new instance of AssetMarker.



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# File 'lib/btcruby/open_assets/asset_marker.rb', line 16

def initialize(output: nil, script: nil, data: nil, quantities: nil, metadata: nil)
  if output || script
    script ||= output.script
    raise ArgumentError, "Script is not an OP_RETURN script" if !script.op_return_script?
    data = script.op_return_data
    raise ArgumentError, "No pushdata found in script" if !data || data.bytesize == 0
    @output = output
    @script = script
  end
  if data
    data = BTC::Data.ensure_binary_encoding(data)
    
    raise ArgumentError, "Data must be at least 6 bytes long (4 bytes prefix and 2 bytes for varints)" if data.bytesize < 6
    raise ArgumentError, "Prefix is invalid. Expected #{BTC.to_hex(PREFIX_V1)}" if data[0, PREFIX_V1.bytesize] != PREFIX_V1

    offset = PREFIX_V1.bytesize
    count, bytesread = WireFormat.read_varint(data: data, offset: offset)
    raise ArgumentError, "Cannot read Asset Quantity Count varint" if !count
    offset = bytesread
    @quantities = []
    count.times do
      qty, bytesread = WireFormat.read_uleb128(data: data, offset: offset)
      raise ArgumentError, "Cannot read Asset Quantity LEB128 unsigned integer" if !qty
      raise ArgumentError, "Open Assets limit LEB128 encoding for quantities to 9 bytes" if (bytesread - offset) > 9
      @quantities << qty
      offset = bytesread
    end
    metadata, bytesread = WireFormat.read_string(data: data, offset: offset)
    raise ArgumentError, "Cannot read Asset Metadata" if !metadata
    @metadata = metadata
    @data = data[0, bytesread]
  else
    # Initialize with optional attributes
    @quantities = quantities
    @metadata = metadata
  end
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/btcruby/open_assets/asset_marker.rb', line 12

def data
  @data
end

#metadata ⇒ Object

Returns the value of attribute metadata.



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# File 'lib/btcruby/open_assets/asset_marker.rb', line 10

def metadata
  @metadata
end

#output ⇒ Object (readonly)

Returns the value of attribute output.



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# File 'lib/btcruby/open_assets/asset_marker.rb', line 13

def output
  @output
end

#quantities ⇒ Object

Returns the value of attribute quantities.



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# File 'lib/btcruby/open_assets/asset_marker.rb', line 9

def quantities
  @quantities
end

#script ⇒ Object (readonly)

Returns the value of attribute script.



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# File 'lib/btcruby/open_assets/asset_marker.rb', line 14

def script
  @script
end