Decentralized Photo Sharing using The Ethereum based Blockchain Platform

• ethereum (geth)
• nodejs
• npm
• embark
• go-ipfs
• mist browser
• ntp

We have built and tested the software on Ubuntu 14.04 LTS on x64 architecture.

0. Install all the dependencies using

   bash install.sh

1. Run

    nohup ipfs daemon &
   

in the terminal. nohup and & enables us to work on the same terminal and put the process in the background.

2. Run

    ipfs swarm connect /ip4/<ip>/tcp/4001/ipfs/<ipfshash>
   

3. Include this in your genesis.json file for each. All nodes should have the same genesis block.

    {
        "nonce": "0x0000000000000042",
        "difficulty": "0x40000",
        "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "coinbase": "0x0000000000000000000000000000000000000000",
        "timestamp": "0x00",
        "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "extraData": "0x",
        "gasLimit": "0x4c4b40"
    }
   

4. Run

    $ geth --identity ”Sukhi” --rpc --rpcport ”8001” --rpccorsdomain ”*”
    --rpcaddr ”0.0.0.0” --datadir ”./node0” --port ”30301” --ipcapi ”ad-
    min,db,eth,debug,miner,net,shh,txpool,personal,web3” --rpcapi ”db,eth,net,web3”
    --autodag --networkid 1900 --nat ”any” init genesis.json
   

5. Run

    $ geth --identity ”Sukhi” --rpc --rpcport ”8001” --rpccorsdomain ”*”
    --rpcaddr ”0.0.0.0” --datadir ”./node0” --port ”30301” --ipcapi ”ad-
    min,db,eth,debug,miner,net,shh,txpool,personal,web3” --rpcapi ”db,eth,net,web3”
    --autodag --networkid 1900 --nat ”any” console on geth command line
   

6. Run admin.addPeer("enode://<enodehash>@<ip>:30301")

7. Make an account in geth by executing personal.newAccount("password")

8. Now set networkx proxy (http and https) to http://<ip>:1337

9. Mine the node. Run miner.start()

10. Type admin.addPeers on geth command line

11. Run

    $ mist –rpc node0/geth.ipc
    

in another terminal and open http://<ip>:8000 in address bar.

Start up MIST browser as follows:

mist --rpc geth.ipc