Method SignatureCache

src/script/sigcache.cpp:20–37

#include <vector>

SignatureCache::SignatureCache(const size_t max_size_bytes)
{
    uint256 nonce = GetRandHash();
    // We want the nonce to be 64 bytes long to force the hasher to process
    // this chunk, which makes later hash computations more efficient. We
    // just write our 32-byte entropy, and then pad with 'E' for ECDSA and
    // 'S' for Schnorr (followed by 0 bytes).
    static constexpr unsigned char PADDING_ECDSA[32] = {'E'};
    static constexpr unsigned char PADDING_SCHNORR[32] = {'S'};
    m_salted_hasher_ecdsa.Write(nonce.begin(), 32);
    m_salted_hasher_ecdsa.Write(PADDING_ECDSA, 32);
    m_salted_hasher_schnorr.Write(nonce.begin(), 32);
    m_salted_hasher_schnorr.Write(PADDING_SCHNORR, 32);

    const auto [num_elems, approx_size_bytes] = setValid.setup_bytes(max_size_bytes);
    LogInfo("Using %zu MiB out of %zu MiB requested for signature cache, able to store %zu elements",
              approx_size_bytes >> 20, max_size_bytes >> 20, num_elems);
}

void SignatureCache::ComputeEntryECDSA(uint256& entry, const uint256& hash, const std::vector<unsigned char>& vchSig, const CPubKey& pubkey) const
{