Method: Klay::Key#sign

Defined in:
lib/klay/key.rb

#sign(blob, chain_id = nil) ⇒ String

Signs arbitrary data without validation. Should not be used unless really desired. See also: #personal_sign, #sign_typed_data, and Signature#recover.

Parameters:

  • blob (Object) —

    that arbitrary data to be signed.

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

    the chain id the signature should be generated on.

Returns:

  • (String) —

    a hexa-decimal signature.



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# File 'lib/klay/key.rb', line 72

def sign(blob, chain_id = nil)
  context = Secp256k1::Context.new
  compact, recovery_id = context.sign_recoverable(@private_key, blob).compact
  signature = compact.bytes
  v = Chain.to_v recovery_id, chain_id
  is_leading_zero = true
  [v].pack("N").unpack("C*").each do |byte|
    is_leading_zero = false if byte > 0 and is_leading_zero
    signature.append byte unless is_leading_zero and byte === 0
  end
  Util.bin_to_hex signature.pack "c*"
end