def tag_prefix
import bend-collections-laws-crypto@1.0.0.0/src/crypto/secp256k1/schnorr.bend as Schnorrimport Base
18# "BIP0340/aux", "BIP0340/nonce", "BIP0340/challenge" in ASCII
19def tag_prefix(rest: List<&2, U32>) -> List<&2, U32>:
20 66 <> 73 <> 80 <> 48 <> 51 <> 52 <> 48 <> 47 <> rest