/EOS.IO-cpp-client

This project aims to have a 100% standalone EOS client, to: build, sign and send transactions to an EOS node.

Primary LanguageC++MIT LicenseMIT

EOS C++ Client Application

This program aims to demonstrate that it is possible to run a client application in C++ for EOS.IO blockchain.

I profile this program to have an overview of the most required functions used in an EOS.IO client application.

Please make an issue for questions or errors.

Important

Pull submodules !

git submodule update --init --recursive

Requirements:

Run the setup.sh or follow the next commands to build required libs.

Make Secp256k1:

cd secp256k1/
./autogen.sh
./configure --enable-module-recovery --without-bignum
make
cd ..

Make cryptopp:

cd cryptopp/
make
cd ..

For abieos: use gcc-8 and g++-8 !

Before anything follow fix: EOSIO/abieos#88

Make abieos:

cd abieos/
git submodule update --init --recursive
mkdir build && cd build
cmake -DCMAKE_C_COMPILER=/usr/bin/gcc-8 -DCMAKE_CXX_COMPILER=/usr/bin/g++-8 ..
make
cd ..

Make the app

To build the app just:

make
./app

Steps to send a transaction

Here is a simple description of the steps inside the program.

From the eojs lib & source code of cleos, a transaction require to send these RPC requests and these steps:

  • get_info
  • get_block
  • get_raw_code_and_abi -> now its just get abi
  • get_required_keys -> useless for us here
  • build (using abieos) & sign transaction (secp256k1)
  • push_transaction

*Checked items are currently done.

requests image

Profiling

With Valgrind/Callgrind

Note: Compile without -pg . Also make sure to REMOVE gperftools include with ProfilerStart and ProfilerStop.

#Run the program:
valgrind --tool=callgrind ./app --push

#Visualize:
kcachegrind <previous file output>

profiling image

with gperftools/pperf

Note: Compile without -pg . Also make sure to ADD gperftools include with ProfilerStart and ProfilerStop.

It seems the program is to fast for gperftools. You still can get some results with CPUPROFILE_REALTIME=1 .

#Run the program:
CPUPROFILE_REALTIME=1 CPUPROFILE_FREQUENCY=10000000 LD_PRELOAD=/usr/local/lib/libprofiler.so.0.5.0 ./app --push

#Visualize:
./pprof -kcachegrind ./app ./profile.txt

Note: to install gperftools/pperf:

#For gperftools:
git clone https://github.com/gperftools/gperftools.git
./autorun.sh
./configure
make
sudo make install

#For pperf:
go get -u github.com/google/pprof
#Or:
git clone https://github.com/google/pprof.git
cd pprof && go build

Acknowledgement

This work has been supported by the French government, through the U CA JEDI and EUR DS4H Investments in the Future projects managed by the National Research Agency (ANR) with the reference number ANR-15-IDEX-0001 and ANR-17-EURE-0004.