Ethereum and Blockchain. - michaelchen0426/knowledge-sharing GitHub Wiki

Getting Started

The smart contract is written by Solidity and we used Ethereum for our blockchain development. Key components are:

Geth as our ethereum client node. Details are here https://github.com/ethereum/go-ethereum/wiki/geth.
solc-js as our Solidity complier. Details are here https://github.com/ethereum/solc-js.
Ropsten as our testnet of Blockchain.
Remix is a good online Ethereum IDE. We can try our script and connect to test account.

Firstly, we need to install all above components:

brew tap ethereum/ethereum
brew install solidity

Use solc-js to compile Solidity code. It will generate json file which contains ABI, Bin and MetaData.

cd ./Ethereum
solc --combined-json=abi,bin,metadata --output-dir . player.sol

Clone the repository to a directory of your choosing:

git clone https://github.com/ethereum/go-ethereum

Building geth requires the Go compiler:

brew install go

Finally, build the geth program using the following command.

cd go-ethereum
make geth

If you see some errors related to header files of Mac OS system library, install XCode Command Line Tools, and try again.

xcode-select --install

Geth --testnet --rpc -rpcapi=”eth,net,web3,personal,txpool” --syncmode=light

geth attach http://127.0.0.1:8545

After we run above command, we are able to connect to Geth client via JS code by using the url http://127.0.0.1:8545 in our script.

cd ./Ethereum
npm install
node deploy.js