Method Unserialize

src/psbt.h:565–1160

    template <typename Stream>
    inline void Unserialize(Stream& s) {
        // Used for duplicate key detection
        std::set<std::vector<unsigned char>> key_lookup;

        // Read loop
        bool found_sep = false;
        while(!s.empty()) {
            // Read
            std::vector<unsigned char> key;
            s >> key;

            // the key is empty if that was actually a separator byte
            // This is a special case for key lengths 0 as those are not allowed (except for separator)
            if (key.empty()) {
                found_sep = true;
                break;
            }

            // Type is compact size uint at beginning of key
            SpanReader skey(s.GetType(), s.GetVersion(), key);
            uint64_t type = ReadCompactSize(skey);

            // Do stuff based on type
            switch(type) {
                case PSBT_IN_NON_WITNESS_UTXO:
                {
                    if (!key_lookup.emplace(key).second) {
                        throw std::ios_base::failure("Duplicate Key, input non-witness utxo already provided");
                    } else if (key.size() != 1) {
                        throw std::ios_base::failure("Non-witness utxo key is more than one byte type");
                    }
                    // Set the stream to unserialize with witness since this is always a valid network transaction
                    OverrideStream<Stream> os(&s, s.GetType(), s.GetVersion() & ~SERIALIZE_TRANSACTION_NO_WITNESS);
                    UnserializeFromVector(os, non_witness_utxo);
                    break;
                }
                case PSBT_IN_WITNESS_UTXO:
                    if (!key_lookup.emplace(key).second) {
                        throw std::ios_base::failure("Duplicate Key, input witness utxo already provided");
                    } else if (key.size() != 1) {
                        throw std::ios_base::failure("Witness utxo key is more than one byte type");
                    }
                    UnserializeFromVector(s, witness_utxo);
                    break;
                case PSBT_IN_PARTIAL_SIG:
                {
                    // Make sure that the key is the size of pubkey + 1
                    if (key.size() != CPubKey::SIZE + 1 && key.size() != CPubKey::COMPRESSED_SIZE + 1) {
                        throw std::ios_base::failure("Size of key was not the expected size for the type partial signature pubkey");
                    }
                    // Read in the pubkey from key
                    CPubKey pubkey(key.begin() + 1, key.end());
                    if (!pubkey.IsFullyValid()) {
                       throw std::ios_base::failure("Invalid pubkey");
                    }
                    if (partial_sigs.count(pubkey.GetID()) > 0) {
                        throw std::ios_base::failure("Duplicate Key, input partial signature for pubkey already provided");
                    }