Ethereum blockchain dashboard

This is a simple visualization project for my ApolloChain demo/prototype.

It is based on web3.js and communicates directly with the local Ethereum node running on your machine. You should run your node with parameters like those:

geth --networkid 42 --nodiscover --rpc --rpccorsdomain "*" console

In order to allow the browser to communicate with the RPC API.

To build the project, run:

browserify viz.js -o main.js

Setup

You need to change the account variable to your account address, and contractAddress to the address of the ApolloTrade smart contract deployed on your blockchain.

If your Ethereum client's RPC port is different than the default, change the following line:

var web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));

abi.js contains the ABI for the smart contract.

How it works

The web3 API is used to display some information about the account:

• Ether balance
• Current block number

ApolloTrade smart contract functions are called to display specific information:

• ApolloCoin balance
• Energy balance

Then a filter is set up to scan all new blocks for transactions and display their contents.

getFunctionHashes() and findFunctionByHash() are used to decode the function hash found in the input parameter for the transaction. Then, web3's SolidityCoder internal class is used to decode the parameters for the function. This allows us to display the details of the ApolloTrade smart contract functions.