diff --git a/libdevcore/BMPBN.h b/libdevcore/BMPBN.h
index 72881389e..347bd2010 100644
--- a/libdevcore/BMPBN.h
+++ b/libdevcore/BMPBN.h
@@ -124,6 +124,16 @@ inline T decode( const uint8_t* input, size_t length ) {
     return result;
 }
 
+template < class T >
+inline T decode_inv( const uint8_t* input, size_t length ) {
+    std::vector< uint8_t > vi;
+    if ( input && length ) {
+        for ( size_t i = 0; i < length; ++i )
+            vi.insert( vi.begin(), input[i] );
+    }
+    return decode< T >( vi.data(), vi.size() );
+}
+
 template < class T >
 inline std::string toHexStringWithPadding(
     const T& value, size_t nPadding = std::string::npos, bool bWith0x = true ) {
diff --git a/libweb3jsonrpc/SkaleStats.cpp b/libweb3jsonrpc/SkaleStats.cpp
index 12600d0ff..c9e649a42 100644
--- a/libweb3jsonrpc/SkaleStats.cpp
+++ b/libweb3jsonrpc/SkaleStats.cpp
@@ -897,34 +897,54 @@ Json::Value SkaleStats::skale_imaVerifyAndSign( const Json::Value& request ) {
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(1), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 contractPosition =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                // std::cout << "\"contractPosition\" is " << toJS( contractPosition ) << std::endl;
                 nPos += nFiledSize;
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(2), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 addressTo =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                // std::cout << "\"addressTo\" is " << toJS( addressTo ) << std::endl;
                 nPos += nFiledSize;
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(3), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 amount =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                // std::cout << "\"amount\" is " << toJS( amount ) << std::endl;
                 nPos += nFiledSize;
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(4), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 sizeOfName =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                // std::cout << "\"sizeOfName\" is " << toJS( sizeOfName ) << std::endl;
                 nPos += nFiledSize;
                 nFiledSize = sizeOfName.convert_to< size_t >();
+                // std::cout << "\"nFiledSize\" is " << nFiledSize << std::endl;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(5), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 std::string strName( "" );
                 strName.insert( strName.end(), ( ( char* ) ( vecBytes.data() ) ) + nPos,
                     ( ( char* ) ( vecBytes.data() ) ) + nPos + nFiledSize );
@@ -932,13 +952,21 @@ Json::Value SkaleStats::skale_imaVerifyAndSign( const Json::Value& request ) {
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(6), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 sizeOfSymbol =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                // std::cout << "\"sizeOfSymbol\" is " << toJS( sizeOfSymbol ) << std::endl;
                 nPos += 32;
                 nFiledSize = sizeOfSymbol.convert_to< size_t >();
+                // std::cout << "\"nFiledSize\" is " << nFiledSize << std::endl;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(7), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 std::string strSymbol( "" );
                 strSymbol.insert( strSymbol.end(), ( ( char* ) ( vecBytes.data() ) ) + nPos,
                     ( ( char* ) ( vecBytes.data() ) ) + nPos + nFiledSize );
@@ -946,15 +974,23 @@ Json::Value SkaleStats::skale_imaVerifyAndSign( const Json::Value& request ) {
                 //
                 nFiledSize = 1;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(8), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const uint8_t nDecimals = uint8_t( vecBytes[nPos] );
+                // std::cout << "\"nDecimals\" is " << nDecimals << std::endl;
                 nPos += nFiledSize;
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC20(9), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 totalSupply =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                // std::cout << "\"totalSupply\" is " << toJS( totalSupply ) << std::endl;
                 nPos += nFiledSize;
                 //
                 if ( nPos > cntMessageBytes ) {
@@ -1003,34 +1039,49 @@ Json::Value SkaleStats::skale_imaVerifyAndSign( const Json::Value& request ) {
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC721(1), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 contractPosition =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
                 nPos += nFiledSize;
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC721(2), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 addressTo =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
                 nPos += nFiledSize;
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC721(3), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 tokenID =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
                 nPos += nFiledSize;
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC721(4), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 sizeOfName =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
                 nPos += nFiledSize;
                 nFiledSize = sizeOfName.convert_to< size_t >();
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC721(5), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 std::string strName( "" );
                 strName.insert( strName.end(), ( ( char* ) ( vecBytes.data() ) ) + nPos,
                     ( ( char* ) ( vecBytes.data() ) ) + nPos + nFiledSize );
@@ -1038,13 +1089,19 @@ Json::Value SkaleStats::skale_imaVerifyAndSign( const Json::Value& request ) {
                 //
                 nFiledSize = 32;
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC721(6), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 const dev::u256 sizeOfSymbol =
-                    BMPBN::decode< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
+                    BMPBN::decode_inv< dev::u256 >( vecBytes.data() + nPos, nFiledSize );
                 nPos += 32;
                 nFiledSize = sizeOfSymbol.convert_to< size_t >();
                 if ( ( nPos + nFiledSize ) > cntMessageBytes )
-                    throw std::runtime_error( "IMA message to short" );
+                    throw std::runtime_error(
+                        skutils::tools::format( "IMA message too short, ERC721(7), nPos=%zu, "
+                                                "nFiledSize=%zu, cntMessageBytes=%zu",
+                            nPos, nFiledSize, cntMessageBytes ) );
                 std::string strSymbol( "" );
                 strSymbol.insert( strSymbol.end(), ( ( char* ) ( vecBytes.data() ) ) + nPos,
                     ( ( char* ) ( vecBytes.data() ) ) + nPos + nFiledSize );