SKALE-3334 add verificationVectorMult to response

DKGCrypto.cpp

@@ -182,15 +182,39 @@ vector <vector<string>> get_verif_vect(const char *encryptedPolyHex, int t, int
     HANDLE_TRUSTED_FUNCTION_ERROR(status, errStatus, errMsg.data());
 
     vector <string> g2Strings = splitString(pubShares.data(), ',');
-    vector <vector<string>> pubSharesVect;
+    vector <vector<string>> pubSharesVect(t);
     for (uint64_t i = 0; i < g2Strings.size(); i++) {
         vector <string> coeffStr = splitString(g2Strings.at(i).c_str(), ':');
-        pubSharesVect.push_back(coeffStr);
+        pubSharesVect[i] = coeffStr;
     }
 
     return pubSharesVect;
 }
 
+vector <vector<string>> getVerificationVectorMult(const std::string& encryptedPolyHex, int t, int n, size_t ind) {
+    auto verificationVector = get_verif_vect(encryptedPolyHex.c_str(), t, n);
+
+    vector<vector<string>> result(t);
+
+    for (size_t i = 0; i < t; ++i) {
+        libff::alt_bn128_G2 current_coefficient;
+        current_coefficient.X.c0 = libff::alt_bn128_Fq(verificationVector[i][0]);
+        current_coefficient.X.c1 = libff::alt_bn128_Fq(verificationVector[i][1]);
+        current_coefficient.Y.c0 = libff::alt_bn128_Fq(verificationVector[i][2]);
+        current_coefficient.Y.c1 = libff::alt_bn128_Fq(verificationVector[i][3]);
+        current_coefficient.Z = libff::alt_bn128_Fq2::one();
+
+        current_coefficient = current_coefficient * libff::power(libff::alt_bn128_Fr(ind + 1), i);
+        current_coefficient.to_affine_coordinates();
+
+        auto g2_str = convertG2ToString(current_coefficient);
+
+        result[i] = splitString(g2_str.c_str(), ':');
+    }
+
+    return result;
+}
+
 string
 getSecretShares(const string &_polyName, const char *_encryptedPolyHex, const vector <string> &_publicKeys,
                 int _t,

DKGCrypto.h

@@ -35,6 +35,8 @@ string gen_dkg_poly( int _t);
 
 vector <vector<string>> get_verif_vect(const char* encryptedPolyHex, int t, int n);
 
+vector <vector<string>> getVerificationVectorMult(const std::string& encryptedPolyHex, int t, int n, size_t ind);
+
 vector<string> splitString(const char* coeffs, const char symbol);
 
 string getSecretShares(const string& _polyName, const char* _encryptedPolyHex, const vector<string>& _publicKeys, int _t, int _n);

SGXWalletServer.cpp

@@ -388,7 +388,7 @@ Json::Value SGXWalletServer::getVerificationVectorImpl(const string &_polyName,
 
         shared_ptr <string> encrPoly = readFromDb(_polyName);
 
-        verifVector = get_verif_vect(encrPoly->c_str(), _t, _n);
+        verifVector = get_verif_vect(encrPoly.get(), _t, _n);
 
         for (int i = 0; i < _t; i++) {
             vector <string> currentCoef = verifVector.at(i);
@@ -603,6 +603,17 @@ Json::Value SGXWalletServer::complaintResponseImpl(const string &_polyName, int
         result["share*G2"] = *shareG2_ptr;
         result["dhKey"] = DHKey;
 
+        shared_ptr <string> encrPoly = readFromDb(_polyName);
+
+        verificationVectorMult = getVerificationVectorMult(encrPoly->c_str(), _t, _n, ind);
+
+        for (int i = 0; i < _t; i++) {
+            vector <string> currentCoef = verifVector.at(i);
+            for (int j = 0; j < 4; j++) {
+                result["verificationVectorMult"][i][j] = currentCoef.at(j);
+            }
+        }
+
 //        TODO: delete dh keys
 //        for (int i = 0; i < _n; i++) {
 //            string name = _polyName + "_" + to_string(i) + ":";