diff --git a/libraries/plugins/peerplays_sidechain/CMakeLists.txt b/libraries/plugins/peerplays_sidechain/CMakeLists.txt
index 6a6faf16..a3910c9e 100644
--- a/libraries/plugins/peerplays_sidechain/CMakeLists.txt
+++ b/libraries/plugins/peerplays_sidechain/CMakeLists.txt
@@ -5,6 +5,7 @@ add_library( peerplays_sidechain
              sidechain_net_manager.cpp
              sidechain_net_handler.cpp
              sidechain_net_handler_bitcoin.cpp
+             bitcoin_utils.cpp
            )
 
 if (SUPPORT_MULTIPLE_SONS)
diff --git a/libraries/plugins/peerplays_sidechain/bitcoin_utils.cpp b/libraries/plugins/peerplays_sidechain/bitcoin_utils.cpp
new file mode 100644
index 00000000..8ed3021a
--- /dev/null
+++ b/libraries/plugins/peerplays_sidechain/bitcoin_utils.cpp
@@ -0,0 +1,713 @@
+#include <graphene/peerplays_sidechain/bitcoin_utils.hpp>
+#include <fc/io/raw.hpp>
+#include <fc/crypto/base58.hpp>
+#include <fc/crypto/elliptic.hpp>
+#include <fc/crypto/ripemd160.hpp>
+#include <fc/crypto/sha256.hpp>
+#include <secp256k1.h>
+
+namespace graphene { namespace peerplays_sidechain {
+
+static const unsigned char OP_0 = 0x00;
+static const unsigned char OP_1 = 0x51;
+static const unsigned char OP_2 = 0x52;
+static const unsigned char OP_3 = 0x53;
+static const unsigned char OP_4 = 0x54;
+static const unsigned char OP_5 = 0x55;
+static const unsigned char OP_6 = 0x56;
+static const unsigned char OP_7 = 0x57;
+static const unsigned char OP_8 = 0x58;
+static const unsigned char OP_9 = 0x59;
+static const unsigned char OP_10 = 0x5a;
+static const unsigned char OP_11 = 0x5b;
+static const unsigned char OP_12 = 0x5c;
+static const unsigned char OP_13 = 0x5d;
+static const unsigned char OP_14 = 0x5e;
+static const unsigned char OP_15 = 0x5f;
+static const unsigned char OP_16 = 0x60;
+
+static const unsigned char OP_IF = 0x63;
+static const unsigned char OP_ENDIF = 0x68;
+static const unsigned char OP_SWAP = 0x7c;
+static const unsigned char OP_EQUAL = 0x87;
+static const unsigned char OP_ADD = 0x93;
+static const unsigned char OP_GREATERTHAN = 0xa0;
+static const unsigned char OP_HASH160 = 0xa9;
+static const unsigned char OP_CHECKSIG = 0xac;
+
+class WriteBytesStream{
+public:
+   WriteBytesStream(bytes& buffer) : storage_(buffer) {}
+
+   void write(const unsigned char* d, size_t s) {
+      storage_.insert(storage_.end(), d, d + s);
+   }
+
+   bool put(unsigned char c) {
+      storage_.push_back(c);
+      return true;
+   }
+
+   void writedata8(uint8_t obj)
+   {
+       write((unsigned char*)&obj, 1);
+   }
+
+   void writedata16(uint16_t obj)
+   {
+       obj = htole16(obj);
+       write((unsigned char*)&obj, 2);
+   }
+
+   void writedata32(uint32_t obj)
+   {
+       obj = htole32(obj);
+       write((unsigned char*)&obj, 4);
+   }
+
+   void writedata64(uint64_t obj)
+   {
+       obj = htole64(obj);
+       write((unsigned char*)&obj, 8);
+   }
+
+   void write_compact_int(uint64_t val)
+   {
+      if (val < 253)
+      {
+          writedata8(val);
+      }
+      else if (val <= std::numeric_limits<unsigned short>::max())
+      {
+          writedata8(253);
+          writedata16(val);
+      }
+      else if (val <= std::numeric_limits<unsigned int>::max())
+      {
+          writedata8(254);
+          writedata32(val);
+      }
+      else
+      {
+          writedata8(255);
+          writedata64(val);
+      }
+   }
+
+   void writedata(const bytes& data)
+   {
+      write_compact_int(data.size());
+      write(&data[0], data.size());
+   }
+private:
+   bytes& storage_;
+};
+
+class ReadBytesStream{
+public:
+   ReadBytesStream(const bytes& buffer, size_t pos = 0) : storage_(buffer), pos_(pos), end_(buffer.size()) {}
+
+   size_t current_pos() const { return pos_; }
+   void set_pos(size_t pos)
+   {
+      if(pos > end_)
+         FC_THROW("Invalid position in BTC tx buffer");
+      pos_ = pos;
+   }
+
+   inline bool read( unsigned char* d, size_t s ) {
+     if( end_ - pos_ >= s ) {
+       memcpy( d, &storage_[pos_], s );
+       pos_ += s;
+       return true;
+     }
+     FC_THROW( "invalid bitcoin tx buffer" );
+   }
+
+   inline bool get( unsigned char& c )
+   {
+     if( pos_ < end_ ) {
+       c = storage_[pos_++];
+       return true;
+     }
+     FC_THROW( "invalid bitcoin tx buffer" );
+   }
+
+   uint8_t readdata8()
+   {
+       uint8_t obj;
+       read((unsigned char*)&obj, 1);
+       return obj;
+   }
+   uint16_t readdata16()
+   {
+       uint16_t obj;
+       read((unsigned char*)&obj, 2);
+       return le16toh(obj);
+   }
+   uint32_t readdata32()
+   {
+       uint32_t obj;
+       read((unsigned char*)&obj, 4);
+       return le32toh(obj);
+   }
+   uint64_t readdata64()
+   {
+       uint64_t obj;
+       read((unsigned char*)&obj, 8);
+       return le64toh(obj);
+   }
+
+   uint64_t read_compact_int()
+   {
+       uint8_t size = readdata8();
+       uint64_t ret = 0;
+       if (size < 253)
+       {
+           ret = size;
+       }
+       else if (size == 253)
+       {
+           ret = readdata16();
+           if (ret < 253)
+               FC_THROW("non-canonical ReadCompactSize()");
+       }
+       else if (size == 254)
+       {
+           ret = readdata32();
+           if (ret < 0x10000u)
+               FC_THROW("non-canonical ReadCompactSize()");
+       }
+       else
+       {
+           ret = readdata64();
+           if (ret < 0x100000000ULL)
+               FC_THROW("non-canonical ReadCompactSize()");
+       }
+       if (ret > (uint64_t)0x02000000)
+           FC_THROW("ReadCompactSize(): size too large");
+       return ret;
+   }
+
+   void readdata(bytes& data)
+   {
+      size_t s = read_compact_int();
+      data.clear();
+      data.resize(s);
+      read(&data[0], s);
+   }
+
+private:
+   const bytes& storage_;
+   size_t pos_;
+   size_t end_;
+};
+
+void btc_outpoint::to_bytes(bytes& stream) const
+{
+   WriteBytesStream str(stream);
+   // TODO: write size?
+   str.write((unsigned char*)hash.data(), hash.data_size());
+   str.writedata32(n);
+}
+
+size_t btc_outpoint::fill_from_bytes(const bytes& data, size_t pos)
+{
+   ReadBytesStream str(data, pos);
+   // TODO: read size?
+   str.read((unsigned char*)hash.data(), hash.data_size());
+   n = str.readdata32();
+   return str.current_pos();
+}
+
+void btc_in::to_bytes(bytes& stream) const
+{
+   prevout.to_bytes(stream);
+   WriteBytesStream str(stream);
+   str.writedata(scriptSig);
+   str.writedata32(nSequence);
+}
+
+size_t btc_in::fill_from_bytes(const bytes& data, size_t pos)
+{
+   pos = prevout.fill_from_bytes(data, pos);
+   ReadBytesStream str(data, pos);
+   str.readdata(scriptSig);
+   nSequence = str.readdata32();
+   return str.current_pos();
+}
+
+void btc_out::to_bytes(bytes& stream) const
+{
+   WriteBytesStream str(stream);
+   str.writedata64(nValue);
+   str.writedata(scriptPubKey);
+}
+
+size_t btc_out::fill_from_bytes(const bytes& data, size_t pos)
+{
+   ReadBytesStream str(data, pos);
+   nValue = str.readdata64();
+   str.readdata(scriptPubKey);
+   return str.current_pos();
+}
+
+void btc_tx::to_bytes(bytes& stream) const
+{
+   WriteBytesStream str(stream);
+   str.writedata32(nVersion);
+   if(hasWitness)
+   {
+      // write dummy inputs and flag
+      str.write_compact_int(0);
+      unsigned char flags = 1;
+      str.put(flags);
+   }
+   str.write_compact_int(vin.size());
+   for(const auto& in: vin)
+      in.to_bytes(stream);
+   str.write_compact_int(vout.size());
+   for(const auto& out: vout)
+      out.to_bytes(stream);
+   if(hasWitness)
+   {
+      for(const auto& in: vin)
+      {
+         str.write_compact_int(in.scriptWitness.size());
+         for(const auto& stack_item: in.scriptWitness)
+            str.writedata(stack_item);
+      }
+   }
+   str.writedata32(nLockTime);
+}
+
+size_t btc_tx::fill_from_bytes(const bytes& data, size_t pos)
+{
+   ReadBytesStream ds( data, pos );
+   nVersion = ds.readdata32();
+   unsigned char flags = 0;
+   vin.clear();
+   vout.clear();
+   hasWitness = false;
+   /* Try to read the vin. In case the dummy is there, this will be read as an empty vector. */
+   size_t vin_size = ds.read_compact_int();
+   vin.resize(vin_size);
+   pos = ds.current_pos();
+   for(auto& in: vin)
+      pos = in.fill_from_bytes(data, pos);
+   ds.set_pos(pos);
+   if (vin_size == 0) {
+       /* We read a dummy or an empty vin. */
+       ds.get(flags);
+       if (flags != 0) {
+          size_t vin_size = ds.read_compact_int();
+          vin.resize(vin_size);
+          pos = ds.current_pos();
+          for(auto& in: vin)
+             pos = in.fill_from_bytes(data, pos);
+          ds.set_pos(pos);
+          size_t vout_size = ds.read_compact_int();
+          vout.resize(vout_size);
+          pos = ds.current_pos();
+          for(auto& out: vout)
+             pos = out.fill_from_bytes(data, pos);
+          ds.set_pos(pos);
+          hasWitness = true;
+       }
+   } else {
+       /* We read a non-empty vin. Assume a normal vout follows. */
+      size_t vout_size = ds.read_compact_int();
+      vout.resize(vout_size);
+      pos = ds.current_pos();
+      for(auto& out: vout)
+         pos = out.fill_from_bytes(data, pos);
+      ds.set_pos(pos);
+   }
+   if (hasWitness) {
+      /* The witness flag is present, and we support witnesses. */
+      for (auto& in: vin)
+      {
+         unsigned int size = ds.read_compact_int();
+         in.scriptWitness.resize(size);
+         for(auto& stack_item: in.scriptWitness)
+            ds.readdata(stack_item);
+      }
+   }
+   nLockTime = ds.readdata32();
+   return ds.current_pos();
+}
+
+
+void add_data_to_script(bytes& script, const bytes& data)
+{
+   WriteBytesStream str(script);
+   str.writedata(data);
+}
+
+void add_number_to_script(bytes& script, unsigned char data)
+{
+   WriteBytesStream str(script);
+   if(data == 0)
+      str.put(OP_0);
+   else if(data == 1)
+      str.put(OP_1);
+   else if(data == 2)
+      str.put(OP_2);
+   else if(data == 3)
+      str.put(OP_3);
+   else if(data == 4)
+      str.put(OP_4);
+   else if(data == 5)
+      str.put(OP_5);
+   else if(data == 6)
+      str.put(OP_6);
+   else if(data == 7)
+      str.put(OP_7);
+   else if(data == 8)
+      str.put(OP_8);
+   else if(data == 9)
+      str.put(OP_9);
+   else if(data == 10)
+      str.put(OP_10);
+   else if(data == 11)
+      str.put(OP_11);
+   else if(data == 12)
+      str.put(OP_12);
+   else if(data == 13)
+      str.put(OP_13);
+   else if(data == 14)
+      str.put(OP_14);
+   else if(data == 15)
+      str.put(OP_15);
+   else if(data == 16)
+      str.put(OP_16);
+   else
+      add_data_to_script(script, {data});
+}
+
+bytes generate_redeem_script(std::vector<std::pair<fc::ecc::public_key, int> > key_data)
+{
+   int total_weight = 0;
+   bytes result;
+   add_number_to_script(result, 0);
+   for(auto& p: key_data)
+   {
+      total_weight += p.second;
+      result.push_back(OP_SWAP);
+      auto raw_data = p.first.serialize();
+      add_data_to_script(result, bytes(raw_data.begin(), raw_data.begin() + raw_data.size()));
+      result.push_back(OP_CHECKSIG);
+      result.push_back(OP_IF);
+      add_number_to_script(result, static_cast<unsigned char>(p.second));
+      result.push_back(OP_ADD);
+      result.push_back(OP_ENDIF);
+   }
+   int threshold_weight = 2 * total_weight / 3;
+   add_number_to_script(result, static_cast<unsigned char>(threshold_weight));
+   result.push_back(OP_GREATERTHAN);
+   return result;
+}
+
+/** The Bech32 character set for encoding. */
+const char* charset = "qpzry9x8gf2tvdw0s3jn54khce6mua7l";
+
+/** Concatenate two byte arrays. */
+bytes cat(bytes x, const bytes& y) {
+    x.insert(x.end(), y.begin(), y.end());
+    return x;
+}
+
+/** Expand a HRP for use in checksum computation. */
+bytes expand_hrp(const std::string& hrp) {
+    bytes ret;
+    ret.resize(hrp.size() * 2 + 1);
+    for (size_t i = 0; i < hrp.size(); ++i) {
+        unsigned char c = hrp[i];
+        ret[i] = c >> 5;
+        ret[i + hrp.size() + 1] = c & 0x1f;
+    }
+    ret[hrp.size()] = 0;
+    return ret;
+}
+
+/** Find the polynomial with value coefficients mod the generator as 30-bit. */
+uint32_t polymod(const bytes& values) {
+    uint32_t chk = 1;
+    for (size_t i = 0; i < values.size(); ++i) {
+        uint8_t top = chk >> 25;
+        chk = (chk & 0x1ffffff) << 5 ^ values[i] ^
+            (-((top >> 0) & 1) & 0x3b6a57b2UL) ^
+            (-((top >> 1) & 1) & 0x26508e6dUL) ^
+            (-((top >> 2) & 1) & 0x1ea119faUL) ^
+            (-((top >> 3) & 1) & 0x3d4233ddUL) ^
+            (-((top >> 4) & 1) & 0x2a1462b3UL);
+    }
+    return chk;
+}
+
+/** Create a checksum. */
+bytes bech32_checksum(const std::string& hrp, const bytes& values) {
+    bytes enc = cat(expand_hrp(hrp), values);
+    enc.resize(enc.size() + 6);
+    uint32_t mod = polymod(enc) ^ 1;
+    bytes ret;
+    ret.resize(6);
+    for (size_t i = 0; i < 6; ++i) {
+        ret[i] = (mod >> (5 * (5 - i))) & 31;
+    }
+    return ret;
+}
+
+/** Encode a Bech32 string. */
+std::string bech32(const std::string& hrp, const bytes& values) {
+    bytes checksum = bech32_checksum(hrp, values);
+    bytes combined = cat(values, checksum);
+    std::string ret = hrp + '1';
+    ret.reserve(ret.size() + combined.size());
+    for (size_t i = 0; i < combined.size(); ++i) {
+        ret += charset[combined[i]];
+    }
+    return ret;
+}
+
+/** Convert from one power-of-2 number base to another. */
+template<int frombits, int tobits, bool pad>
+bool convertbits(bytes& out, const bytes& in) {
+    int acc = 0;
+    int bits = 0;
+    const int maxv = (1 << tobits) - 1;
+    const int max_acc = (1 << (frombits + tobits - 1)) - 1;
+    for (size_t i = 0; i < in.size(); ++i) {
+        int value = in[i];
+        acc = ((acc << frombits) | value) & max_acc;
+        bits += frombits;
+        while (bits >= tobits) {
+            bits -= tobits;
+            out.push_back((acc >> bits) & maxv);
+        }
+    }
+    if (pad) {
+        if (bits) out.push_back((acc << (tobits - bits)) & maxv);
+    } else if (bits >= frombits || ((acc << (tobits - bits)) & maxv)) {
+        return false;
+    }
+    return true;
+}
+
+/** Encode a SegWit address. */
+std::string segwit_addr_encode(const std::string& hrp, uint8_t witver, const bytes& witprog) {
+    bytes enc;
+    enc.push_back(witver);
+    convertbits<8, 5, true>(enc, witprog);
+    std::string ret = bech32(hrp, enc);
+    return ret;
+}
+
+std::string p2wsh_address_from_redeem_script(const bytes& script, bitcoin_network network)
+{
+   // calc script hash
+   fc::sha256 sh = fc::sha256::hash(reinterpret_cast<const char*>(&script[0]), script.size());
+   bytes wp(sh.data(), sh.data() + sh.data_size());
+   switch (network) {
+   case(mainnet):
+      return segwit_addr_encode("bc", 0, wp);
+   case(testnet):
+   case(regtest):
+      return segwit_addr_encode("tb", 0, wp);
+   default:
+      FC_THROW("Unknown bitcoin network type");
+   }
+   FC_THROW("Unknown bitcoin network type");
+}
+
+bytes lock_script_for_redeem_script(const bytes &script)
+{
+   bytes result;
+   result.push_back(OP_0);
+   fc::sha256 h = fc::sha256::hash(reinterpret_cast<const char*>(&script[0]), script.size());
+   bytes shash(h.data(), h.data() + h.data_size());
+   add_data_to_script(result, shash);
+   return result;
+}
+
+bytes hash_prevouts(const btc_tx& unsigned_tx)
+{
+   fc::sha256::encoder hasher;
+   for(const auto& in: unsigned_tx.vin)
+   {
+      bytes data;
+      in.prevout.to_bytes(data);
+      hasher.write(reinterpret_cast<const char*>(&data[0]), data.size());
+   }
+   fc::sha256 res = fc::sha256::hash(hasher.result());
+   return bytes(res.data(), res.data() + res.data_size());
+}
+
+bytes hash_sequence(const btc_tx& unsigned_tx)
+{
+   fc::sha256::encoder hasher;
+   for(const auto& in: unsigned_tx.vin)
+   {
+      hasher.write(reinterpret_cast<const char*>(&in.nSequence), sizeof(in.nSequence));
+   }
+   fc::sha256 res = fc::sha256::hash(hasher.result());
+   return bytes(res.data(), res.data() + res.data_size());
+}
+
+bytes hash_outputs(const btc_tx& unsigned_tx)
+{
+   fc::sha256::encoder hasher;
+   for(const auto& out: unsigned_tx.vout)
+   {
+      bytes data;
+      out.to_bytes(data);
+      hasher.write(reinterpret_cast<const char*>(&data[0]), data.size());
+   }
+   fc::sha256 res = fc::sha256::hash(hasher.result());
+   return bytes(res.data(), res.data() + res.data_size());
+}
+
+const secp256k1_context_t* btc_get_context() {
+    static secp256k1_context_t* ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY | SECP256K1_CONTEXT_SIGN );
+    return ctx;
+}
+
+bytes der_sign(const fc::ecc::private_key& priv_key, const fc::sha256& digest)
+{
+   fc::ecc::signature result;
+   int size = result.size();
+   FC_ASSERT( secp256k1_ecdsa_sign( btc_get_context(),
+                                    (unsigned char*) digest.data(),
+                                    (unsigned char*) result.begin(),
+                                    &size,
+                                    (unsigned char*) priv_key.get_secret().data(),
+                                    secp256k1_nonce_function_rfc6979,
+                                    nullptr));
+   return bytes(result.begin(), result.begin() + size);
+}
+
+std::vector<bytes> signature_for_raw_transaction(const bytes& unsigned_tx,
+                                                 std::vector<uint64_t> in_amounts,
+                                                 const bytes& redeem_script,
+                                                 const fc::ecc::private_key& priv_key)
+{
+   btc_tx tx;
+   tx.fill_from_bytes(unsigned_tx);
+
+   FC_ASSERT(tx.vin.size() == in_amounts.size(), "Incorrect input amounts data");
+
+   std::vector<bytes> results;
+   auto cur_amount = in_amounts.begin();
+   // pre-calc reused values
+   bytes hashPrevouts = hash_prevouts(tx);
+   bytes hashSequence = hash_sequence(tx);
+   bytes hashOutputs = hash_outputs(tx);
+   // calc digest for every input according to BIP143
+   // implement SIGHASH_ALL scheme
+   for(const auto& in: tx.vin)
+   {
+      fc::sha256::encoder hasher;
+      hasher.write(reinterpret_cast<const char*>(&tx.nVersion), sizeof(tx.nVersion));
+      hasher.write(reinterpret_cast<const char*>(&hashPrevouts[0]), hashPrevouts.size());
+      hasher.write(reinterpret_cast<const char*>(&hashSequence[0]), hashSequence.size());
+      bytes data;
+      in.prevout.to_bytes(data);
+      hasher.write(reinterpret_cast<const char*>(&data[0]), data.size());
+      bytes serializedScript;
+      WriteBytesStream stream(serializedScript);
+      stream.writedata(redeem_script);
+      hasher.write(reinterpret_cast<const char*>(&serializedScript[0]), serializedScript.size());
+      uint64_t amount = *cur_amount++;
+      hasher.write(reinterpret_cast<const char*>(&amount), sizeof(amount));
+      hasher.write(reinterpret_cast<const char*>(&in.nSequence), sizeof(in.nSequence));
+      hasher.write(reinterpret_cast<const char*>(&hashOutputs[0]), hashOutputs.size());
+      hasher.write(reinterpret_cast<const char*>(&tx.nLockTime), sizeof(tx.nLockTime));
+      // add sigtype SIGHASH_ALL
+      uint32_t sigtype = 1;
+      hasher.write(reinterpret_cast<const char*>(&sigtype), sizeof(sigtype));
+
+      fc::sha256 digest = fc::sha256::hash(hasher.result());
+      //std::vector<char> res = priv_key.sign(digest);
+      //bytes s_data(res.begin(), res.end());
+      bytes s_data = der_sign(priv_key, digest);
+      s_data.push_back(1);
+      results.push_back(s_data);
+   }
+   return results;
+}
+
+bytes sign_pw_transfer_transaction(const bytes &unsigned_tx, std::vector<uint64_t> in_amounts, const bytes& redeem_script, const std::vector<fc::optional<fc::ecc::private_key> > &priv_keys)
+{
+   btc_tx tx;
+   tx.fill_from_bytes(unsigned_tx);
+   bytes dummy_data;
+   for(auto key: priv_keys)
+   {
+      if(key)
+      {
+         std::vector<bytes> signatures = signature_for_raw_transaction(unsigned_tx, in_amounts, redeem_script, *key);
+         FC_ASSERT(signatures.size() == tx.vin.size(), "Invalid signatures number");
+         // push signatures in reverse order because script starts to check the top signature on the stack first
+         for(unsigned int i = 0; i < tx.vin.size(); i++)
+            tx.vin[i].scriptWitness.insert(tx.vin[i].scriptWitness.begin(), signatures[i]);
+      }
+      else
+      {
+         for(unsigned int i = 0; i < tx.vin.size(); i++)
+            tx.vin[i].scriptWitness.push_back(dummy_data);
+      }
+   }
+
+   for(auto& in: tx.vin)
+   {
+      in.scriptWitness.push_back(redeem_script);
+   }
+
+   tx.hasWitness = true;
+   bytes ret;
+   tx.to_bytes(ret);
+   return ret;
+}
+
+bytes add_dummy_signatures_for_pw_transfer(const bytes& unsigned_tx,
+                                           const bytes& redeem_script,
+                                           unsigned int key_count)
+{
+   btc_tx tx;
+   tx.fill_from_bytes(unsigned_tx);
+
+   bytes dummy_data;
+   for(auto& in: tx.vin)
+   {
+      for(unsigned i = 0; i < key_count; i++)
+         in.scriptWitness.push_back(dummy_data);
+      in.scriptWitness.push_back(redeem_script);
+   }
+
+   tx.hasWitness = true;
+   bytes ret;
+   tx.to_bytes(ret);
+   return ret;
+}
+
+bytes partially_sign_pw_transfer_transaction(const bytes& partially_signed_tx,
+                                   std::vector<uint64_t> in_amounts,
+                                   const fc::ecc::private_key& priv_key,
+                                   unsigned int key_idx)
+{
+   btc_tx tx;
+   tx.fill_from_bytes(partially_signed_tx);
+   FC_ASSERT(tx.vin.size() > 0);
+   bytes redeem_script = tx.vin[0].scriptWitness.back();
+   std::vector<bytes> signatures = signature_for_raw_transaction(partially_signed_tx, in_amounts, redeem_script, priv_key);
+   FC_ASSERT(signatures.size() == tx.vin.size(), "Invalid signatures number");
+   // push signatures in reverse order because script starts to check the top signature on the stack first
+   unsigned witness_idx = tx.vin[0].scriptWitness.size() - 2 - key_idx;
+   for(unsigned int i = 0; i < tx.vin.size(); i++)
+      tx.vin[i].scriptWitness[witness_idx] = signatures[i];
+   bytes ret;
+   tx.to_bytes(ret);
+   return ret;
+}
+
+}}
diff --git a/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/bitcoin_utils.hpp b/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/bitcoin_utils.hpp
new file mode 100644
index 00000000..718bdd95
--- /dev/null
+++ b/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/bitcoin_utils.hpp
@@ -0,0 +1,78 @@
+#pragma once
+#include <graphene/peerplays_sidechain/defs.hpp>
+#include <fc/optional.hpp>
+
+namespace graphene { namespace peerplays_sidechain {
+
+enum bitcoin_network {
+   mainnet,
+   testnet,
+   regtest
+};
+
+bytes generate_redeem_script(std::vector<std::pair<fc::ecc::public_key, int> > key_data);
+std::string p2wsh_address_from_redeem_script(const bytes& script, bitcoin_network network = mainnet);
+bytes lock_script_for_redeem_script(const bytes& script);
+
+
+/*
+ * unsigned_tx - tx,  all inputs of which are spends of the PW P2SH address
+ * returns signed transaction
+ */
+bytes sign_pw_transfer_transaction(const bytes& unsigned_tx,
+                                   std::vector<uint64_t> in_amounts,
+                                   const bytes& redeem_script,
+                                   const std::vector<fc::optional<fc::ecc::private_key>>& priv_keys);
+
+bytes add_dummy_signatures_for_pw_transfer(const bytes& unsigned_tx,
+                                           const bytes& redeem_script,
+                                           unsigned int key_count);
+
+bytes partially_sign_pw_transfer_transaction(const bytes& partially_signed_tx,
+                                   std::vector<uint64_t> in_amounts,
+                                   const fc::ecc::private_key& priv_key,
+                                   unsigned int key_idx);
+
+struct btc_outpoint
+{
+   fc::uint256 hash;
+   uint32_t n;
+
+   void to_bytes(bytes& stream) const;
+   size_t fill_from_bytes(const bytes& data, size_t pos = 0);
+};
+
+struct btc_in
+{
+   btc_outpoint prevout;
+   bytes scriptSig;
+   uint32_t nSequence;
+   std::vector<bytes> scriptWitness;
+
+   void to_bytes(bytes& stream) const;
+   size_t fill_from_bytes(const bytes& data, size_t pos = 0);
+};
+
+struct btc_out
+{
+   int64_t nValue;
+   bytes scriptPubKey;
+
+   void to_bytes(bytes& stream) const;
+   size_t fill_from_bytes(const bytes& data, size_t pos = 0);
+};
+
+struct btc_tx
+{
+   std::vector<btc_in> vin;
+   std::vector<btc_out> vout;
+   int32_t nVersion;
+   uint32_t nLockTime;
+   bool hasWitness;
+
+   void to_bytes(bytes& stream) const;
+   size_t fill_from_bytes(const bytes& data, size_t pos = 0);
+};
+
+}}
+
diff --git a/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/defs.hpp b/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/defs.hpp
index 3bd94a49..ae1d222c 100644
--- a/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/defs.hpp
+++ b/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/defs.hpp
@@ -18,7 +18,7 @@ enum class sidechain_type {
    peerplays
 };
 
-using bytes = std::vector<char>;
+using bytes = std::vector<unsigned char>;
 
 struct prev_out
 {
diff --git a/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_bitcoin.hpp b/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_bitcoin.hpp
index 803b24de..9768066b 100644
--- a/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_bitcoin.hpp
+++ b/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_bitcoin.hpp
@@ -11,6 +11,14 @@
 
 namespace graphene { namespace peerplays_sidechain {
 
+class btc_txout
+{
+public:
+   std::string txid_;
+   unsigned int out_num_;
+   double amount_;
+};
+
 class bitcoin_rpc_client {
 public:
    bitcoin_rpc_client( std::string _ip, uint32_t _rpc, std::string _user, std::string _password) ;
@@ -21,6 +29,9 @@ public:
    void send_btc_tx( const std::string& tx_hex );
    std::string add_multisig_address( const std::vector<std::string> public_keys );
    bool connection_is_not_defined() const;
+   void import_address( const std::string& address_or_script);
+   std::vector<btc_txout> list_unspent();
+   std::string prepare_tx(const std::vector<btc_txout>& ins, const fc::flat_map<std::string, double> outs);
 
 private:
 
diff --git a/libraries/plugins/peerplays_sidechain/sidechain_net_handler_bitcoin.cpp b/libraries/plugins/peerplays_sidechain/sidechain_net_handler_bitcoin.cpp
index cdd3611e..40da9240 100644
--- a/libraries/plugins/peerplays_sidechain/sidechain_net_handler_bitcoin.cpp
+++ b/libraries/plugins/peerplays_sidechain/sidechain_net_handler_bitcoin.cpp
@@ -173,6 +173,120 @@ bool bitcoin_rpc_client::connection_is_not_defined() const
    return ip.empty() || rpc_port == 0 || user.empty() || password.empty();
 }
 
+void bitcoin_rpc_client::import_address(const std::string &address_or_script)
+{
+   const auto body = std::string("{\"jsonrpc\": \"1.0\", \"id\":\"pp_plugin\", \"method\": \"importaddress\", \"params\": [") +
+                     std::string("\"") + address_or_script + std::string("\"") + std::string("] }");
+
+   const auto reply = send_post_request( body );
+
+   if( reply.body.empty() )
+   {
+      wlog("Failed to import address [${addr}]", ("addr", address_or_script));
+      return;
+   }
+
+   std::string reply_str( reply.body.begin(), reply.body.end() );
+
+   std::stringstream ss(reply_str);
+   boost::property_tree::ptree json;
+   boost::property_tree::read_json( ss, json );
+
+   if( reply.status == 200 ) {
+      idump((address_or_script)(reply_str));
+      return;
+   } else if( json.count( "error" ) && !json.get_child( "error" ).empty() ) {
+      wlog( "Failed to import address [${addr}]! Reply: ${msg}", ("addr", address_or_script)("msg", reply_str) );
+   }
+}
+
+std::vector<btc_txout> bitcoin_rpc_client::list_unspent()
+{
+   const auto body = std::string("{\"jsonrpc\": \"1.0\", \"id\":\"pp_plugin\", \"method\": \"listunspent\", \"params\": [] }");
+
+   const auto reply = send_post_request( body );
+
+   std::vector<btc_txout> result;
+   if( reply.body.empty() )
+   {
+      wlog("Failed to list unspent txo");
+      return result;
+   }
+
+   std::string reply_str( reply.body.begin(), reply.body.end() );
+
+   std::stringstream ss(reply_str);
+   boost::property_tree::ptree json;
+   boost::property_tree::read_json( ss, json );
+
+   if( reply.status == 200 ) {
+      idump((reply_str));
+      if( json.count( "result" ) )
+      {
+         for(auto& entry: json.get_child("result"))
+         {
+            btc_txout txo;
+            txo.txid_ = entry.second.get_child("txid").get_value<std::string>();
+            txo.out_num_ = entry.second.get_child("vout").get_value<unsigned int>();
+            txo.amount_ = entry.second.get_child("amount").get_value<double>();
+            result.push_back(txo);
+         }
+      }
+   } else if( json.count( "error" ) && !json.get_child( "error" ).empty() ) {
+      wlog( "Failed to list unspent txo! Reply: ${msg}", ("msg", reply_str) );
+   }
+   return result;
+}
+
+std::string bitcoin_rpc_client::prepare_tx(const std::vector<btc_txout> &ins, const fc::flat_map<std::string, double> outs)
+{
+   std::string body("{\"jsonrpc\": \"1.0\", \"id\":\"pp_plugin\", \"method\": \"createrawtransaction\", \"params\": [");
+   body += "[";
+   bool first = true;
+   for(const auto& entry: ins)
+   {
+      if(!first)
+         body += ",";
+      body += "{\"txid\":\"" + entry.txid_ + "\",\"vout\":\"" + fc::to_string(entry.out_num_) + "\"}";
+      first = false;
+   }
+   body += "]";
+   first = true;
+   body += "{";
+   for(const auto& entry: outs)
+   {
+      if(!first)
+         body += ",";
+      body += "\"" + entry.first + "\":\"" + fc::to_string(entry.second) + "\"";
+      first = false;
+   }
+   body += "}";
+   body += std::string("] }");
+
+   const auto reply = send_post_request( body );
+
+   if( reply.body.empty() )
+   {
+      wlog("Failed to create raw transaction: [${body}]", ("body", body));
+      return std::string();
+   }
+
+   std::string reply_str( reply.body.begin(), reply.body.end() );
+
+   std::stringstream ss(reply_str);
+   boost::property_tree::ptree json;
+   boost::property_tree::read_json( ss, json );
+
+   if( reply.status == 200 ) {
+      idump((reply_str));
+      if( json.count( "result" ) )
+         return json.get_child("result").get_value<std::string>();
+   } else if( json.count( "error" ) && !json.get_child( "error" ).empty() ) {
+      wlog( "Failed to create raw transaction: [${body}]! Reply: ${msg}", ("body", body)("msg", reply_str) );
+   }
+   return std::string();
+}
+
 fc::http::reply bitcoin_rpc_client::send_post_request( std::string body )
 {
    fc::http::connection conn;
diff --git a/tests/peerplays_sidechain/bitcoin_utils_test.cpp b/tests/peerplays_sidechain/bitcoin_utils_test.cpp
new file mode 100644
index 00000000..878149cc
--- /dev/null
+++ b/tests/peerplays_sidechain/bitcoin_utils_test.cpp
@@ -0,0 +1,316 @@
+#include <boost/test/unit_test.hpp>
+#include <graphene/peerplays_sidechain/bitcoin_utils.hpp>
+#include <fc/crypto/hex.hpp>
+#include <fc/crypto/elliptic.hpp>
+#include <fc/crypto/base58.hpp>
+#include <secp256k1.h>
+
+using namespace graphene::peerplays_sidechain;
+
+BOOST_AUTO_TEST_CASE(tx_serialization)
+{
+   // use real mainnet transaction
+   // txid: 6189e3febb5a21cee8b725aa1ef04ffce7e609448446d3a8d6f483c634ef5315
+   // json: {"txid":"6189e3febb5a21cee8b725aa1ef04ffce7e609448446d3a8d6f483c634ef5315","hash":"6189e3febb5a21cee8b725aa1ef04ffce7e609448446d3a8d6f483c634ef5315","version":1,"size":224,"vsize":224,"weight":896,"locktime":0,"vin":[{"txid":"55d079ca797fee81416b71b373abedd8722e33c9f73177be0166b5d5fdac478b","vout":0,"scriptSig":{"asm":"3045022100d82e57d4d11d3b811d07f2fa4ded2fb8a3b7bb1d3e9f293433de5c0d1093c3bd02206704ccd2ff437e2f7716b5e9f2502a9cbb41f1245a18b2b10296980f1ae38253[ALL] 02be9919a5ba373b1af58ad757db19e7c836116bb8138e0c6d99599e4db96568f4","hex":"483045022100d82e57d4d11d3b811d07f2fa4ded2fb8a3b7bb1d3e9f293433de5c0d1093c3bd02206704ccd2ff437e2f7716b5e9f2502a9cbb41f1245a18b2b10296980f1ae38253012102be9919a5ba373b1af58ad757db19e7c836116bb8138e0c6d99599e4db96568f4"},"sequence":4294967295}],"vout":[{"value":1.26491535,"n":0,"scriptPubKey":{"asm":"OP_DUP OP_HASH160 95783804d28e528fbc4b48c7700471e6845804eb OP_EQUALVERIFY OP_CHECKSIG","hex":"76a91495783804d28e528fbc4b48c7700471e6845804eb88ac","reqSigs":1,"type":"pubkeyhash","addresses":["1EdKhXv7zjGowPzgDQ4z1wa2ukVrXRXXkP"]}},{"value":0.0002,"n":1,"scriptPubKey":{"asm":"OP_HASH160 fb0670971091da8248b5c900c6515727a20e8662 OP_EQUAL","hex":"a914fb0670971091da8248b5c900c6515727a20e866287","reqSigs":1,"type":"scripthash","addresses":["3QaKF8zobqcqY8aS6nxCD5ZYdiRfL3RCmU"]}}]}
+   // hex: "01000000018b47acfdd5b56601be7731f7c9332e72d8edab73b3716b4181ee7f79ca79d055000000006b483045022100d82e57d4d11d3b811d07f2fa4ded2fb8a3b7bb1d3e9f293433de5c0d1093c3bd02206704ccd2ff437e2f7716b5e9f2502a9cbb41f1245a18b2b10296980f1ae38253012102be9919a5ba373b1af58ad757db19e7c836116bb8138e0c6d99599e4db96568f4ffffffff028f1b8a07000000001976a91495783804d28e528fbc4b48c7700471e6845804eb88ac204e00000000000017a914fb0670971091da8248b5c900c6515727a20e86628700000000"
+   fc::string strtx("01000000018b47acfdd5b56601be7731f7c9332e72d8edab73b3716b4181ee7f79ca79d055000000006b483045022100d82e57d4d11d3b811d07f2fa4ded2fb8a3b7bb1d3e9f293433de5c0d1093c3bd02206704ccd2ff437e2f7716b5e9f2502a9cbb41f1245a18b2b10296980f1ae38253012102be9919a5ba373b1af58ad757db19e7c836116bb8138e0c6d99599e4db96568f4ffffffff028f1b8a07000000001976a91495783804d28e528fbc4b48c7700471e6845804eb88ac204e00000000000017a914fb0670971091da8248b5c900c6515727a20e86628700000000");
+   bytes bintx;
+   bintx.resize(strtx.length() / 2);
+   fc::from_hex(strtx, reinterpret_cast<char*>(&bintx[0]), bintx.size());
+   btc_tx tx;
+   BOOST_CHECK_NO_THROW(tx.fill_from_bytes(bintx));
+   BOOST_CHECK(tx.nVersion == 1);
+   BOOST_CHECK(tx.nLockTime == 0);
+   BOOST_CHECK(tx.vin.size() == 1);
+   BOOST_CHECK(tx.vout.size() == 2);
+   bytes buff;
+   tx.to_bytes(buff);
+   BOOST_CHECK(bintx == buff);
+}
+
+BOOST_AUTO_TEST_CASE(pw_transfer)
+{
+   // key set for the old Primary Wallet
+   std::vector<fc::ecc::private_key> priv_old;
+   for(unsigned i = 0; i < 15; ++i)
+   {
+      const char* seed = reinterpret_cast<const char*>(&i);
+      fc::sha256 h = fc::sha256::hash(seed, sizeof(i));
+      priv_old.push_back(fc::ecc::private_key::generate_from_seed(h));
+   }
+   // print old keys
+   for(auto key: priv_old)
+   {
+      fc::sha256 secret = key.get_secret();
+      bytes data({239});
+      data.insert(data.end(), secret.data(), secret.data() + secret.data_size());
+      fc::sha256 cs = fc::sha256::hash(fc::sha256::hash((char*)&data[0], data.size()));
+      data.insert(data.end(), cs.data(), cs.data() + 4);
+   }
+   std::vector<fc::ecc::public_key> pub_old;
+   for(auto& key: priv_old)
+      pub_old.push_back(key.get_public_key());
+   // old key weights
+   std::vector<std::pair<fc::ecc::public_key, int> > weights_old;
+   for(unsigned i = 0; i < 15; ++i)
+      weights_old.push_back(std::make_pair(pub_old[i], i + 1));
+   // redeem script for old PW
+   bytes redeem_old =generate_redeem_script(weights_old);
+
+   // Old PW address
+   std::string old_pw = p2wsh_address_from_redeem_script(redeem_old, bitcoin_network::testnet);
+   // This address was filled with testnet transaction 508a36d65de66db7c57ee6c5502068ebdcba996ca2df23ef42d901ec8fba1766
+   BOOST_REQUIRE(old_pw == "tb1qfhstznulf5cmjzahlkmnuuvs0tkjtwjlme3ugz8jzfjanf8h5rwsp45t7e");
+
+   bytes scriptPubKey = lock_script_for_redeem_script(redeem_old);
+
+   // key set for the new Primary Wallet
+   std::vector<fc::ecc::private_key> priv_new;
+   for(unsigned i = 16; i < 31; ++i)
+   {
+      const char* seed = reinterpret_cast<const char*>(&i);
+      fc::sha256 h = fc::sha256::hash(seed, sizeof(i));
+      priv_new.push_back(fc::ecc::private_key::generate_from_seed(h));
+   }
+   std::vector<fc::ecc::public_key> pub_new;
+   for(auto& key: priv_new)
+      pub_new.push_back(key.get_public_key());
+   // new key weights
+   std::vector<std::pair<fc::ecc::public_key, int> > weights_new;
+   for(unsigned i = 0; i < 15; ++i)
+      weights_new.push_back(std::make_pair(pub_new[i], 16 - i));
+   // redeem script for new PW
+   bytes redeem_new =generate_redeem_script(weights_new);
+   // New PW address
+   std::string new_pw = p2wsh_address_from_redeem_script(redeem_new, bitcoin_network::testnet);
+   BOOST_REQUIRE(new_pw == "tb1qzegrz8r8z8ddfkql8595d90czng6eyjmx4ur73ls4pq57jg99qhsh9fd2y");
+
+   // try to move funds from old wallet to new one
+
+   // get unspent outputs for old wallet with list_uspent (address should be
+   // added to wallet with import_address before). It should return
+   // 1 UTXO: [508a36d65de66db7c57ee6c5502068ebdcba996ca2df23ef42d901ec8fba1766:0]
+   // with 20000 satoshis
+   // So, we creating a raw transaction with 1 input and one output that gets
+   // 20000 - fee satoshis with createrawtransaction call (bitcoin_rpc_client::prepare_tx)
+   // Here we just serialize the transaction without scriptSig in inputs then sign it.
+   btc_outpoint outpoint;
+   outpoint.hash = fc::uint256("508a36d65de66db7c57ee6c5502068ebdcba996ca2df23ef42d901ec8fba1766");
+   // reverse hash due to the different from_hex algo
+   std::reverse(outpoint.hash.data(), outpoint.hash.data() + outpoint.hash.data_size());
+   outpoint.n = 0;
+   btc_in input;
+   input.prevout = outpoint;
+   input.nSequence = 0xffffffff;
+   btc_out output;
+   output.nValue = 19000;
+   output.scriptPubKey = lock_script_for_redeem_script(redeem_new);
+   btc_tx tx;
+   tx.nVersion = 2;
+   tx.nLockTime = 0;
+   tx.hasWitness = false;
+   tx.vin.push_back(input);
+   tx.vout.push_back(output);
+   bytes unsigned_tx;
+   tx.to_bytes(unsigned_tx);
+   std::vector<uint64_t> in_amounts({20000});
+   std::vector<fc::optional<fc::ecc::private_key>> keys_to_sign;
+   for(auto key: priv_old)
+      keys_to_sign.push_back(fc::optional<fc::ecc::private_key>(key));
+   bytes signed_tx =sign_pw_transfer_transaction(unsigned_tx, in_amounts, redeem_old, keys_to_sign);
+   // this is real testnet tx with id 1734a2f6192c3953c90f9fd7f69eba16eeb0922207f81f3af32d6534a6f8e850
+   BOOST_CHECK(fc::to_hex((char*)&signed_tx[0], signed_tx.size()) == "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");
+}
+
+BOOST_AUTO_TEST_CASE(pw_separate_sign)
+{
+   // key set for the old Primary Wallet
+   std::vector<fc::ecc::private_key> priv_old;
+   for(unsigned i = 0; i < 15; ++i)
+   {
+      const char* seed = reinterpret_cast<const char*>(&i);
+      fc::sha256 h = fc::sha256::hash(seed, sizeof(i));
+      priv_old.push_back(fc::ecc::private_key::generate_from_seed(h));
+   }
+   // print old keys
+   for(auto key: priv_old)
+   {
+      fc::sha256 secret = key.get_secret();
+      bytes data({239});
+      data.insert(data.end(), secret.data(), secret.data() + secret.data_size());
+      fc::sha256 cs = fc::sha256::hash(fc::sha256::hash((char*)&data[0], data.size()));
+      data.insert(data.end(), cs.data(), cs.data() + 4);
+   }
+   std::vector<fc::ecc::public_key> pub_old;
+   for(auto& key: priv_old)
+      pub_old.push_back(key.get_public_key());
+   // old key weights
+   std::vector<std::pair<fc::ecc::public_key, int> > weights_old;
+   for(unsigned i = 0; i < 15; ++i)
+      weights_old.push_back(std::make_pair(pub_old[i], i + 1));
+   // redeem script for old PW
+   bytes redeem_old =generate_redeem_script(weights_old);
+
+   // Old PW address
+   std::string old_pw = p2wsh_address_from_redeem_script(redeem_old, bitcoin_network::testnet);
+   // This address was filled with testnet transaction 508a36d65de66db7c57ee6c5502068ebdcba996ca2df23ef42d901ec8fba1766
+   BOOST_REQUIRE(old_pw == "tb1qfhstznulf5cmjzahlkmnuuvs0tkjtwjlme3ugz8jzfjanf8h5rwsp45t7e");
+
+   bytes scriptPubKey = lock_script_for_redeem_script(redeem_old);
+
+   // key set for the new Primary Wallet
+   std::vector<fc::ecc::private_key> priv_new;
+   for(unsigned i = 16; i < 31; ++i)
+   {
+      const char* seed = reinterpret_cast<const char*>(&i);
+      fc::sha256 h = fc::sha256::hash(seed, sizeof(i));
+      priv_new.push_back(fc::ecc::private_key::generate_from_seed(h));
+   }
+   std::vector<fc::ecc::public_key> pub_new;
+   for(auto& key: priv_new)
+      pub_new.push_back(key.get_public_key());
+   // new key weights
+   std::vector<std::pair<fc::ecc::public_key, int> > weights_new;
+   for(unsigned i = 0; i < 15; ++i)
+      weights_new.push_back(std::make_pair(pub_new[i], 16 - i));
+   // redeem script for new PW
+   bytes redeem_new =generate_redeem_script(weights_new);
+   // New PW address
+   std::string new_pw = p2wsh_address_from_redeem_script(redeem_new, bitcoin_network::testnet);
+   BOOST_REQUIRE(new_pw == "tb1qzegrz8r8z8ddfkql8595d90czng6eyjmx4ur73ls4pq57jg99qhsh9fd2y");
+
+   // try to move funds from old wallet to new one
+
+   // get unspent outputs for old wallet with list_uspent (address should be
+   // added to wallet with import_address before). It should return
+   // 1 UTXO: [508a36d65de66db7c57ee6c5502068ebdcba996ca2df23ef42d901ec8fba1766:0]
+   // with 20000 satoshis
+   // So, we creating a raw transaction with 1 input and one output that gets
+   // 20000 - fee satoshis with createrawtransaction call (bitcoin_rpc_client::prepare_tx)
+   // Here we just serialize the transaction without scriptSig in inputs then sign it.
+   btc_outpoint outpoint;
+   outpoint.hash = fc::uint256("508a36d65de66db7c57ee6c5502068ebdcba996ca2df23ef42d901ec8fba1766");
+   // reverse hash due to the different from_hex algo
+   std::reverse(outpoint.hash.data(), outpoint.hash.data() + outpoint.hash.data_size());
+   outpoint.n = 0;
+   btc_in input;
+   input.prevout = outpoint;
+   input.nSequence = 0xffffffff;
+   btc_out output;
+   output.nValue = 19000;
+   output.scriptPubKey = lock_script_for_redeem_script(redeem_new);
+   btc_tx tx;
+   tx.nVersion = 2;
+   tx.nLockTime = 0;
+   tx.hasWitness = false;
+   tx.vin.push_back(input);
+   tx.vout.push_back(output);
+   bytes unsigned_tx;
+   tx.to_bytes(unsigned_tx);
+   std::vector<uint64_t> in_amounts({20000});
+
+   // prepare tx with dummy signs
+   bytes partially_signed_tx = add_dummy_signatures_for_pw_transfer(unsigned_tx, redeem_old, 15);
+
+   // sign with every old key one by one
+   for(unsigned idx = 0; idx < 15; idx++)
+      partially_signed_tx = partially_sign_pw_transfer_transaction(partially_signed_tx, in_amounts, priv_old[idx], idx);
+
+   // now this is real testnet tx with id 1734a2f6192c3953c90f9fd7f69eba16eeb0922207f81f3af32d6534a6f8e850
+   BOOST_CHECK(fc::to_hex((char*)&partially_signed_tx[0], partially_signed_tx.size()) == "020000000001016617ba8fec01d942ef23dfa26c99badceb682050c5e67ec5b76de65dd6368a500000000000ffffffff01384a0000000000002200201650311c6711dad4d81f3d0b4695f814d1ac925b35783f47f0a8414f4905282f10473044022028cf6df7ed5c2761d7aa2af20717c8b5ace168a7800d6a566f2c1ae28160cae502205e01a3d91f5b9870577e36fbc26ce0cecc3e628cc376c7016364ec3f370703140147304402205c9a88cbe41eb9c6a16ba1d747456222cbe951d04739d21309ef0c0cf00727f202202d06db830ee5823882c7b6f82b708111a8f37741878896cd3558fb91efe8076401473044022009c3184fc0385eb7ed8dc0374791cbdace0eff0dc27dd80ac68f8cb81110f700022042267e8a8788c314347234ea10db6c1ec21a2d423b784cbfbaadf3b2393c44630147304402202363ce306570dc0bbf6d18d41b67c6488a014a91d8e24c03670b4f65523aca12022029d04c114b8e93d982cadee89d80bb25c5c8bc437d6cd2bfce8e0d83a08d14410148304502210087b4742e5cf9c77ca9f99928e7c7087e7d786e09216485628509e4e0b2f29d7e02207daf2eaee9fe8bf117074be137b7ae4b8503a4f6d263424e8e6a16405d5b723c0147304402204f1c3ed8cf595bfaf79d90f4c55c04c17bb6d446e3b9beca7ee6ee7895c6b752022022ac032f219a81b2845d0a1abfb904e40036a3ad332e7dfada6fda21ef7080b501483045022100d020eca4ba1aa77de9caf98f3a29f74f55268276860b9fa35fa16cfc00219dd8022028237de6ad063116cf8182d2dd45a09cb90c2ec8104d793eb3635a1290027cd6014730440220322193b0feba7356651465b86463c7619cd3d96729df6242e9571c74ff1c3c2902206e1de8e77b71c7b6031a934b52321134b6a8d138e2124e90f6345decbd543efb01483045022100d70ade49b3f17812785a41711e107b27c3d4981f8e12253629c07ec46ee511af02203e1ea9059ed9165eeff827002c7399a30c478a9b6f2b958621bfbc6713ab4dd30147304402206f7f10d9993c7019360276bbe790ab587adadeab08088593a9a0c56524aca4df02207c147fe2e51484801a4e059e611e7514729d685a5df892dcf02ba59d455e678101483045022100d5071b8039364bfaa53ef5e22206f773539b082f28bd1fbaaea995fa28aae0f5022056edf7a7bdd8a9a54273a667be5bcd11191fc871798fb44f6e1e35c95d86a81201483045022100a39f8ffbcd9c3f0591fc731a9856c8e024041017cba20c9935f13e4abcf9e9dc0220786823b8cd55664ff9ad6277899aacfd56fa8e48c38881482418b7d50ca27211014730440220361d3b87fcc2b1c12a9e7c684c78192ccb7fe51b90c281b7058384b0b036927a0220434c9b403ee3802b4e5b53feb9bb37d2a9d8746c3688da993549dd9d9954c6800147304402206dc4c3a4407fe9cbffb724928aa0597148c14a20d0d7fbb36ad5d3e2a3abf85e022039ef7baebbf08494495a038b009c6d4ff4b91c38db840673b87f6c27c3b53e7e01483045022100cadac495ea78d0ce9678a4334b8c43f7fafeea5a59413cc2a0144addb63485f9022078ca133e020e3afd0e79936337afefc21d84d3839f5a225a0f3d3eebc15f959901fd5c02007c21030e88484f2bb5dcfc0b326e9eb565c27c8291efb064d060d226916857a2676e62ac635193687c2102151ad794a3aeb3cf9c190120da3d13d36cd8bdf21ca1ccb15debd61c601314b0ac635293687c2103b45a5955ea7847d121225c752edaeb4a5d731a056a951a876caaf6d1f69adb7dac635393687c2102def03a6ffade4ffb0017c8d93859a247badd60e2d76d00e2a3713f6621932ec1ac635493687c21035f17aa7d58b8c3ee0d87240fded52b27f3f12768a0a54ba2595e0a929dd87155ac635593687c2103c8582ac6b0bd20cc1b02c6a86bad2ea10cadb758fedd754ba0d97be85b63b5a7ac635693687c21028148a1f9669fc4471e76f7a371d7cc0563b26e0821d9633fd37649744ff54edaac635793687c2102f0313701b0035f0365a59ce1a3d7ae7045e1f2fb25c4656c08071e5baf51483dac635893687c21024c4c25d08173b3c4d4e1375f8107fd7040c2dc0691ae1bf6fe82b8c88a85185fac635993687c210360fe2daa8661a3d25d0df79875d70b1c3d443ade731caafda7488cb68b4071b0ac635a93687c210250e41a6a4abd7b0b3a49eaec24a6fafa99e5aa7b1e3a5aabe60664276df3d937ac635b93687c2103045a32125930ca103c7d7c79b6f379754796cd4ea7fb0059da926e415e3877d3ac635c93687c210344943249d7ca9b47316fef0c2a413dda3a75416a449a29f310ab7fc9d052ed70ac635d93687c2103c62967320b63df5136ff1ef4c7959ef5917ee5a44f75c83e870bc488143d4d69ac635e93687c21020429f776e15770e4dc52bd6f72e6ed6908d51de1c4a64878433c4e3860a48dc4ac635f93680150a000000000");
+}
+
+BOOST_AUTO_TEST_CASE(pw_partially_sign)
+{
+   // key set for the old Primary Wallet
+   std::vector<fc::ecc::private_key> priv_old;
+   for(unsigned i = 0; i < 15; ++i)
+   {
+      const char* seed = reinterpret_cast<const char*>(&i);
+      fc::sha256 h = fc::sha256::hash(seed, sizeof(i));
+      priv_old.push_back(fc::ecc::private_key::generate_from_seed(h));
+   }
+   // print old keys
+   for(auto key: priv_old)
+   {
+      fc::sha256 secret = key.get_secret();
+      bytes data({239});
+      data.insert(data.end(), secret.data(), secret.data() + secret.data_size());
+      fc::sha256 cs = fc::sha256::hash(fc::sha256::hash((char*)&data[0], data.size()));
+      data.insert(data.end(), cs.data(), cs.data() + 4);
+   }
+   std::vector<fc::ecc::public_key> pub_old;
+   for(auto& key: priv_old)
+      pub_old.push_back(key.get_public_key());
+   // old key weights
+   std::vector<std::pair<fc::ecc::public_key, int> > weights_old;
+   for(unsigned i = 0; i < 15; ++i)
+      weights_old.push_back(std::make_pair(pub_old[i], i + 1));
+   // redeem script for old PW
+   bytes redeem_old =generate_redeem_script(weights_old);
+
+   // Old PW address
+   std::string old_pw = p2wsh_address_from_redeem_script(redeem_old, bitcoin_network::testnet);
+   // This address was filled with testnet transaction 508a36d65de66db7c57ee6c5502068ebdcba996ca2df23ef42d901ec8fba1766
+   BOOST_REQUIRE(old_pw == "tb1qfhstznulf5cmjzahlkmnuuvs0tkjtwjlme3ugz8jzfjanf8h5rwsp45t7e");
+
+   bytes scriptPubKey = lock_script_for_redeem_script(redeem_old);
+
+   // key set for the new Primary Wallet
+   std::vector<fc::ecc::private_key> priv_new;
+   for(unsigned i = 16; i < 31; ++i)
+   {
+      const char* seed = reinterpret_cast<const char*>(&i);
+      fc::sha256 h = fc::sha256::hash(seed, sizeof(i));
+      priv_new.push_back(fc::ecc::private_key::generate_from_seed(h));
+   }
+   std::vector<fc::ecc::public_key> pub_new;
+   for(auto& key: priv_new)
+      pub_new.push_back(key.get_public_key());
+   // new key weights
+   std::vector<std::pair<fc::ecc::public_key, int> > weights_new;
+   for(unsigned i = 0; i < 15; ++i)
+      weights_new.push_back(std::make_pair(pub_new[i], 16 - i));
+   // redeem script for new PW
+   bytes redeem_new =generate_redeem_script(weights_new);
+   // New PW address
+   std::string new_pw = p2wsh_address_from_redeem_script(redeem_new, bitcoin_network::testnet);
+   BOOST_REQUIRE(new_pw == "tb1qzegrz8r8z8ddfkql8595d90czng6eyjmx4ur73ls4pq57jg99qhsh9fd2y");
+
+   // try to move funds from old wallet to new one
+
+   // Spent 1 UTXO: [7007b77fcd5fe097d02679252aa112900d08ab20c06052f4148265b21b1f9fbf:0]
+   // with 29999 satoshis
+   // So, we creating a raw transaction with 1 input and one output that gets
+   // 29999 - fee satoshis with createrawtransaction call (bitcoin_rpc_client::prepare_tx)
+   btc_outpoint outpoint;
+   outpoint.hash = fc::uint256("7007b77fcd5fe097d02679252aa112900d08ab20c06052f4148265b21b1f9fbf");
+   // reverse hash due to the different from_hex algo
+   std::reverse(outpoint.hash.data(), outpoint.hash.data() + outpoint.hash.data_size());
+   outpoint.n = 0;
+   btc_in input;
+   input.prevout = outpoint;
+   input.nSequence = 0xffffffff;
+   btc_out output;
+   output.nValue = 29000;
+   output.scriptPubKey = lock_script_for_redeem_script(redeem_new);
+   btc_tx tx;
+   tx.nVersion = 2;
+   tx.nLockTime = 0;
+   tx.hasWitness = false;
+   tx.vin.push_back(input);
+   tx.vout.push_back(output);
+   bytes unsigned_tx;
+   tx.to_bytes(unsigned_tx);
+   std::vector<uint64_t> in_amounts({29999});
+
+   // prepare tx with dummy signs
+   bytes partially_signed_tx = add_dummy_signatures_for_pw_transfer(unsigned_tx, redeem_old, 15);
+
+   // sign with every old key one by one except the first one
+   for(unsigned idx = 1; idx < 15; idx++)
+      partially_signed_tx = partially_sign_pw_transfer_transaction(partially_signed_tx, in_amounts, priv_old[idx], idx);
+
+   // now this is real testnet tx with id e86455c40da6993b6fed70daea2046287b206ab5c16e1ab58c4dfb4a7d6efb84
+   BOOST_CHECK(fc::to_hex((char*)&partially_signed_tx[0], partially_signed_tx.size()) == "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");
+}