Stuff

Stuf.md

Stuf

Installation

$ sudo add-apt-repository ppa:ethereum/ethereum
$ sudo apt-get update
$ sudo apt-get install ethereum

Private Network

• Make an account: geth account new.

• Save this to a file genesis.json.

   {
      "nonce": "0x0000000000000123",
      "timestamp": "0x0",
      "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
      "extraData": "0x0",
      "gasLimit": "0x8000000",
      "difficulty": "0x1",
      "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
      "coinbase": "0x3333333333333333333333333333333333333333",
      "alloc": {}
   }

• Run geth init genesis.json.

• For unsafe test usage, just unlock your primary account and start geth like this:

$ geth --rpc --networkid 12345 --mine --etherbase 0 --unlock 0 --password <(echo your-password-here)

• Connect to Ethereum node: geth attach

• Write a contract:

  • In browser solidity, type something like

   pragma solidity ^0.4.3;
  
   contract Ticker {
   	uint public val;
   	function tick() {
   		val+=1;
   	}
   }
  

  • Copy the code from the web3 deploy box and paste it into your terminal session with the geth javascript console.
  • This is give you the contract you wrote and expose its functions as elements of a javascript object.
  • Note: I know this is a completely stupid way to program. If you get sick of this, you can try cloning kidwai/ethereumjs-sandbox and following the README there, but I frankly haven't tested it very much, so you may run into issues (which you are free to report).

Testnet

• This is going to be rather slow right now, but you can repeat the above steps but when setting up your geth node, do geth --testnet account new, and geth --testnet --rpc ... instead. This is going to take you a while because you have to sync with the network. I suggest not doing this first.