darkID-prototype/eth/instructions.md

• start node and blockchain syncing in testnet

geth --testnet --datadir ~/eth-testnet

• create first account (wallet)

geth --testnet --datadir ~/eth-testnet account new

• mine ethers in testnet

geth --testnet --datadir ~/eth-testnet --mine

• serve dapp running on localhost:8000 via RPC

geth --testnet --datadir ~/eth-testnet --rpc --rpccorsdomain "http://localhost:8000" --rpcapi eth,web3,personal

• generate ABI from contract.sol

solcjs --abi HelloWorldContract.sol

• generate the byte code

solcjs --bin HelloWorldContract.sol

• deploy contract via geth js console

  • open geth console

  geth --testnet --datadir ~/eth-testnet console
  

  • in the console create the contract using ABI and BYTE CODE result from compilation

  var abi = [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"}];
  var code = '0x60606040527f48656c6c6f20576f726c64000000000000000000000000000000000000000000600090600019169055341561003957600080fd5b5b609d806100486000396000f30060606040526000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff16806306fdde0314603d575b600080fd5b3415604757600080fd5b604d606b565b60405180826000191660001916815260200191505060405180910390f35b600054815600a165627a7a72305820f4c510e24a238337d5334b5b38a44e88ea53ef40f26aeb96eba4609cb72827cd0029';
  web3.personal.unlockAccount(eth.accounts[0], 'PASSWORD');
  var inputdata = ["pub", "h", "u", "sv", "signerid"];
  var contract = web3.eth.contract(abi).new(inputdata,{ from: eth.accounts[0], data: code, gas: 1000000 });
  web3.personal.lockAccount(eth.accounts[0]);
  

  • call the method in the contract

  contract.name()