Function CreatePeginWitnessInner

src/pegins.cpp:508–540

template<typename T_tx_ref, typename T_merkle_block>
CScriptWitness CreatePeginWitnessInner(const CAmount& value, const CAsset& asset, const uint256& genesis_hash, const CScript& claim_script, const T_tx_ref& tx_ref, const T_merkle_block& merkle_block)
{
    std::vector<unsigned char> value_bytes;
    CVectorWriter ss_val(0, 0, value_bytes, 0);
    try {
        ss_val << value;
    } catch (...) {
        throw std::ios_base::failure("Amount serialization is invalid.");
    }

    // Strip witness data for proof inclusion since only TXID-covered fields matters
    CDataStream ss_tx(SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS);
    ss_tx << tx_ref;
    const auto* ss_tx_ptr = UCharCast(ss_tx.data());
    std::vector<unsigned char> tx_data_stripped(ss_tx_ptr, ss_tx_ptr + ss_tx.size());

    // Serialize merkle block
    CDataStream ss_txout_proof(SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS);
    ss_txout_proof << merkle_block;
    const auto* ss_txout_ptr = UCharCast(ss_txout_proof.data());
    std::vector<unsigned char> txout_proof_bytes(ss_txout_ptr, ss_txout_ptr + ss_txout_proof.size());

    // Construct pegin proof
    CScriptWitness pegin_witness;
    std::vector<std::vector<unsigned char>>& stack = pegin_witness.stack;
    stack.push_back(value_bytes);
    stack.push_back(std::vector<unsigned char>(asset.begin(), asset.end()));
    stack.push_back(std::vector<unsigned char>(genesis_hash.begin(), genesis_hash.end()));
    stack.push_back(std::vector<unsigned char>(claim_script.begin(), claim_script.end()));
    stack.push_back(tx_data_stripped);
    stack.push_back(txout_proof_bytes);
    return pegin_witness;
}

CScriptWitness CreatePeginWitness(const CAmount& value, const CAsset& asset, const uint256& genesis_hash, const CScript& claim_script, const CTransactionRef& tx_ref, const CMerkleBlock& merkle_block)
{