Exsat EVM trustless bridge

The contracts for staking and claiming rewards have been moved to https://github.com/exsat-network/evmutil-contracts. This repository now only contains the code for the trustless bridge for ERC20 tokens.

This repository contains the Solidity and Antelope contracts needed to support the trustless bridges.

Those contracts (both within solidity_contracts and antelope_contracts) enable communication and tokens moves between the EVM and Native environments.

Dependencies

• [Spring] (https://github.com/AntelopeIO/spring) 1.1 or greater
• [CDT Compiler] (https://github.com/AntelopeIO/cdt) 4.0 or greater
• [Vaulta EVM runtime contract] (https://github.com/VaultaFoundation/evm-contract)
• solc: (version 0.8.21 or greater)
  • Used to compile the .sol files.
  • We chose to use solcjs because it is more actively maintained than the solc available from the package manager.
    • First install node.js and npm.
    • Then install solcjs: npm install -g solc
  • Make sure to install at least version 0.8.21.
    • Confirm with solcjs --version.
• Install jq used to compile solidity contracts
  • apt-get install jq
• Install xxd used to compile solidity contracts
  • apt-get install xxd

Building the EVM bridge contract

git submodule update --init --recursive

mkdir build
cd build

export eosevm_DIR=<EVM_RUNTIME_BUILD_DIRECTORY>

cmake -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -Deosevm_DIR=<EVM_RUNTIME_BUILD_DIRECTORY> -Dspring_DIR=<SPRING_DIRECTORY> -Dcdt_DIR=<CDT_DIRECTORY> .. && make -j8

You will get the wasm and abi at:

./build/antelope_contracts/contracts/erc20/erc20.wasm
./build/antelope_contracts/contracts/erc20/erc20.abi

Running tests

cd build && ctest --output-on-failure --verbose 

Design details and deployment steps

Please refer to https://github.com/VaultaFoundation/evm-public-docs/tree/main/Trustless_bridge