Function ChallengeNumber

src/test/miniscript_tests.cpp:123–123

With each leaf condition we associate a challenge number. * For hashes it's just the first 4 bytes of the hash. For pubkeys, it's the last 4 bytes. */

 * For hashes it's just the first 4 bytes of the hash. For pubkeys, it's the last 4 bytes.
 */
uint32_t ChallengeNumber(const CPubKey& pubkey) { return ReadLE32(pubkey.data() + 29); }
uint32_t ChallengeNumber(const std::vector<unsigned char>& hash) { return ReadLE32(hash.data()); }

//! A Challenge is a combination of type of leaf condition and its challenge number.