Class: Bitcoin::Descriptor::MuSig

Inherits:
Expression show all
Defined in:
lib/bitcoin/descriptor/musig.rb

Overview

musig() descriptor class.

See Also:

Constant Summary collapse

CHAINCODE =

SHA256 of ‘MuSig2MuSig2MuSig2` github.com/bitcoin/bips/blob/master/bip-0328.mediawiki

'868087ca02a6f974c4598924c36b57762d32cb45717167e300622c7167e38965'.htb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Expression

#==, #args, #compressed_key?, #derive_path, #extract_pubkey, #to_script

Constructor Details

#initialize(keys, path = nil) ⇒ Bitcoin::Descriptor::MuSig

Constructor.

Raises:

  • (ArgumentError) 


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# File 'lib/bitcoin/descriptor/musig.rb', line 19

def initialize(keys, path = nil)
  raise ArgumentError, "keys must be an array." unless keys.is_a?(Array)
  unless path.nil?
    raise ArgumentError, "path must be String." unless path.is_a?(String)
    raise ArgumentError, "path must be start with /." unless path.start_with?("/")
  end
  validate_keys!(keys, path)
  @keys = keys
  @path = path
end

Instance Attribute Details

#keys ⇒ Object (readonly)

Returns the value of attribute keys.



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# File 'lib/bitcoin/descriptor/musig.rb', line 12

def keys
  @keys
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/bitcoin/descriptor/musig.rb', line 13

def path
  @path
end

Instance Method Details

#to_hex ⇒ String

Convert to single key with hex format.



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# File 'lib/bitcoin/descriptor/musig.rb', line 40

def to_hex
  sorted_key = Schnorr::MuSig2.sort_pubkeys(keys.map{|k| extract_pubkey(k).pubkey})
  agg_key = Schnorr::MuSig2.aggregate(sorted_key)
  if path.nil?
    agg_key.x_only_pubkey
  else
    ext_key = Bitcoin::ExtPubkey.new
    ext_key.pubkey = agg_key.q.to_hex
    ext_key.depth = 0
    ext_key.chain_code = CHAINCODE
    _, *paths = path.split('/')
    derived_key = derive_path(ext_key, paths)
    derived_key.key.xonly_pubkey
  end
end

#to_s(checksum: nil) ⇒ Object 



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# File 'lib/bitcoin/descriptor/musig.rb', line 56

def to_s(checksum: nil)
  desc = "#{type.to_s}(#{keys.join(',')})"
  desc << path if path
  checksum ? Checksum.descsum_create(desc) : desc
end

#top_level? ⇒ Boolean 



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# File 'lib/bitcoin/descriptor/musig.rb', line 34

def top_level?
  false
end

#type ⇒ Object 



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# File 'lib/bitcoin/descriptor/musig.rb', line 30

def type
  :musig
end