simfony_as_rust::jet::signature_hash_modes

Function build_taptweak

Source 
pub fn build_taptweak(a: Pubkey, b: u256) -> u256
Expand description

Implementation of taproot_tweak_pubkey from BIP-0341.

§Panics

  1. The input x-only public key is off curve or exceeds the field size.
  2. The internal hash value t exceeds the secp256k1 group order.
  3. The generated tweaked point is infinity, and thus has no valid x-only public key.

Note that situations 2 and 3 are cryptographically impossible to occur.

§Cost

92813 mWU (milli weight units)