Geth console can t access smart contract

Question

I have created a Smart contract in truffle and deployed it in Ethereum private network. I am running MetaCoin box which I download from truffle official website.

I started my network using the following command:

geth --datadir ./myDataDir --networkid 1234 --rpc --rpcport 8546 --rpcapi "eth,net,web3"

Now I have entered the geth console but whenever I run any commands related to MetaCoin, I get error telling it is not defined:

> MetaCoin.at(<address>).address
ReferenceError: ‘MetaCoin’ is not defined

Answer 1

You are running commands using an object that you have not defined (MetaCoin). So when you run the above command, geth does not know what you are talking about. Before running the command, you need to create an object of MetaCoin. Run the below command and then you won’t get the error:

var MetaCoin = web3.eth.Contract(metaCoinJsonAbi, itsAddress);