_bip0340_hash
ret = _bip0340_hash((const u8*)BIP0340_CHALLENGE, sizeof(BIP0340_CHALLENGE) - 1,
ret = _bip0340_hash((const u8*)BIP0340_AUX, sizeof(BIP0340_AUX) - 1,
ret = _bip0340_hash((const u8*)BIP0340_NONCE, sizeof(BIP0340_NONCE) - 1,
ret = _bip0340_hash((const u8*)BIP0340_NONCE, sizeof(BIP0340_NONCE) - 1,
ret = _bip0340_hash((const u8*)BIP0340_CHALLENGE, sizeof(BIP0340_CHALLENGE) - 1,
ret = _bip0340_hash((const u8*)BIP0340_CHALLENGE, sizeof(BIP0340_CHALLENGE) - 1,
ret = _bip0340_hash((const u8*)BIP0340_CHALLENGE, sizeof(BIP0340_CHALLENGE) - 1,